LF to 4 GHz High Linearity Y-Mixer ADL5350

LF to 4 GHz
High Linearity Y-Mixer
ADL5350
FUNCTIONAL BLOCK DIAGRAM
Broadband radio frequency (RF), intermediate frequency (IF),
and local oscillator (LO) ports
Conversion loss: 6.8 dB
Noise figure: 6.5 dB
High input IP3: 25 dBm
High input P1dB: 19 dBm
Low LO drive level
Single-ended design: no need for baluns
Single-supply operation: 3 V @ 19 mA
Miniature, 2 mm × 3 mm, 8-lead LFCSP
RoHS compliant
GND
RF
INPUT OR
OUTPUT
IF
OUTPUT OR
INPUT
ADL5350
RF
IF
3V
GND
VPOS
LO
LO
INPUT
05615-001
FEATURES
Figure 1.
APPLICATIONS
Cellular base stations
Point-to-point radio links
RF instrumentation
GENERAL DESCRIPTION
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The ADL5350 is a high linearity, up-and-down converting
mixer capable of operating over a broad input frequency range.
It is well suited for demanding cellular base station mixer designs
that require high sensitivity and effective blocker immunity. Based
on a GaAs pHEMT, single-ended mixer architecture, the ADL5350
provides excellent input linearity and low noise figure without
the need for a high power level LO drive.
In 850 MHz/900 MHz receive applications, the ADL5350
provides a typical conversion loss of only 6.7 dB. The input IP3
is typically greater than 25 dBm, with an input compression
point of 19 dBm. The integrated LO amplifier allows a low LO
drive level, typically only 4 dBm for most applications.
The high input linearity of the ADL5350 makes the device an
excellent mixer for communications systems that require high
blocker immunity, such as GSM 850 MHz/900 MHz and
800 MHz CDMA2000. At 2 GHz, a slightly greater supply
current is required to obtain similar performance.
The single-ended broadband RF/IF port allows the device to be
customized for a desired band of operation using simple external
filter networks. The LO-to-RF isolation is based on the LO
rejection of the RF port filter network. Greater isolation can be
achieved by using higher order filter networks, as described in
the Applications Information section.
The ADL5350 is fabricated on a GaAs pHEMT, high performance
IC process. The ADL5350 is available in a 2 mm × 3 mm, 8-lead
LFCSP. It operates over a −40°C to +85°C temperature range.
An evaluation board is also available.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2008 Analog Devices, Inc. All rights reserved.
ADL5350
TABLE OF CONTENTS
Features .............................................................................................. 1
Typical Performance Characteristics ..............................................7
Applications....................................................................................... 1
850 MHz Characteristics..............................................................7
Functional Block Diagram .............................................................. 1
1950 MHz Characteristics......................................................... 12
General Description ......................................................................... 1
Functional Description.................................................................. 17
Revision History ............................................................................... 2
Circuit Description .................................................................... 17
Specifications..................................................................................... 3
Implementation Procedure ....................................................... 17
850 MHz Receive Performance .................................................. 3
Applications Information .............................................................. 19
1950 MHz Receive Performance ................................................ 3
Low Frequency Applications .................................................... 19
Spur Tables......................................................................................... 4
High Frequency Applications ................................................... 19
850 MHz Spur Table..................................................................... 4
Evaluation Board ............................................................................ 21
1950 MHz Spur Table................................................................... 4
Outline Dimensions ....................................................................... 22
Absolute Maximum Ratings............................................................ 5
Ordering Guide .......................................................................... 22
ESD Caution.................................................................................. 5
Pin Configuration and Function Descriptions............................. 6
REVISION HISTORY
2/08—Revision 0: Initial Version
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Rev. 0 | Page 2 of 24
ADL5350
SPECIFICATIONS
850 MHz RECEIVE PERFORMANCE
VS = 3 V, TA = 25°C, LO power = 4 dBm, re: 50 Ω, unless otherwise noted.
Table 1.
Parameter
RF Frequency Range
LO Frequency Range
IF Frequency Range
Conversion Loss
SSB Noise Figure
Input Third-Order Intercept (IP3)
Input 1dB Compression Point (P1dB)
LO-to-IF Leakage
LO-to-RF Leakage
RF-to-IF Leakage
IF/2 Spurious
Supply Voltage
Supply Current
Min
750
500
30
2.7
Typ
850
780
70
6.7
6.4
25
19.8
29
13
19.5
−50
3
16.5
Max
975
945
250
3.5
Unit
MHz
MHz
MHz
dB
dB
dBm
dBm
dBc
dBc
dBc
dBc
V
mA
Conditions
Low-side LO
fRF = 850 MHz, fLO = 780 MHz, fIF = 70 MHz
fRF = 850 MHz, fLO = 780 MHz, fIF = 70 MHz
fRF1 = 849 MHz, fRF2 = 850 MHz, fLO = 780 MHz, fIF = 70 MHz;
each RF tone 0 dBm
fRF = 820 MHz, fLO = 750 MHz, fIF = 70 MHz
LO power = 4 dBm, fLO = 780 MHz
LO power = 4 dBm, fLO = 780 MHz
RF power = 0 dBm, fRF = 850 MHz, fLO = 780 MHz
RF power = 0 dBm, fRF = 850 MHz, fLO = 780 MHz
LO power = 4 dBm
1950 MHz RECEIVE PERFORMANCE
VS = 3 V, TA = 25°C, LO power = 6 dBm, re: 50 Ω, unless otherwise noted.
Table 2.
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Parameter
RF Frequency Range
LO Frequency Range
IF Frequency Range
Conversion Loss
SSB Noise Figure
Input Third-Order Intercept (IP3)
Input 1dB Compression Point (P1dB)
LO-to-IF Leakage
LO-to-RF Leakage
RF-to-IF Leakage
IF/2 Spurious
Supply Voltage
Supply Current
Min
1800
1420
50
2.7
Typ
1950
1760
190
6.8
6.5
25
19
13.5
10.5
11.5
−54
3
19
Max
2050
2000
380
3.5
Unit
MHz
MHz
MHz
dB
dB
dBm
dBm
dBc
dBc
dBc
dBc
V
mA
Conditions
Low-side LO
fRF = 1950 MHz, fLO = 1760 MHz, fIF = 190 MHz
fRF = 1950 MHz, fLO = 1760 MHz, fIF = 190 MHz
fRF1 = 1949 MHz, fRF2 = 1951 MHz, fLO = 1760 MHz, fIF = 190 MHz;
each RF tone 0 dBm
fRF = 1950 MHz, fLO = 1760 MHz, fIF = 190 MHz
LO power = 6 dBm, fLO = 1760 MHz
LO power = 6 dBm, fLO = 1760 MHz
RF power = 0 dBm, fRF = 1950 MHz, fLO = 1760 MHz
RF power = 0 dBm, fRF = 1950 MHz, fLO = 1760 MHz
LO power = 6 dBm
Rev. 0 | Page 3 of 24
ADL5350
SPUR TABLES
All spur tables are (N × fRF) − (M × fLO) mixer spurious products for 0 dBm input power, unless otherwise noted. N.M. indicates that a
spur was not measured due to it being at a frequency >6 GHz.
850 MHz SPUR TABLE
Table 3.
N
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
–20.6
–5.6
–69.2
–66.0
–92.6
≤–100
≤–100
≤–100
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
2
–19.2
–23.6
–50.5
–71.8
–91.6
≤–100
≤–100
≤–100
≤–100
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
3
–15.3
–19.6
–59.8
–68.1
–96.1
≤–100
≤–100
≤–100
≤–100
≤–100
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
4
–16.7
–31.9
–49.1
–70.2
–92.7
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
N.M.
N.M.
N.M.
N.M.
N.M.
5
–38.4
–28.7
–57.5
–67.4
–98.7
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
N.M.
N.M.
N.M.
N.M.
6
–26.6
–46.1
–51.0
–66.9
–90.2
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
N.M.
N.M.
N.M.
5
N.M.
N.M.
–74.6
–64.3
–76.5
–77.1
≤–100
≤–100
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
6
N.M.
N.M.
N.M.
–83.7
–80.0
–79.5
–93.4
≤–100
≤–100
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
7
–22.1
–48.5
–77.7
–70.8
–91.7
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
N.M.
N.M.
8
N.M.
–33.2
–65.8
–85.2
–88.8
–99.5
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
N.M.
9
N.M.
N.M.
–60.8
–87.3
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
10
N.M.
N.M.
N.M.
–72.2
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
11
N.M.
N.M.
N.M.
N.M.
–91.7
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
12
N.M.
N.M.
N.M.
N.M.
–88.6
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
13
N.M.
N.M.
N.M.
N.M.
N.M.
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
14
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
8
N.M.
N.M.
N.M.
N.M.
N.M.
–95.2
≤–100
–96.4
≤–100
≤–100
≤–100
N.M.
N.M.
N.M.
N.M.
N.M.
9
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
–99.2
≤–100
≤–100
≤–100
≤–100
≤–100
N.M.
N.M.
N.M.
N.M.
10
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
N.M.
N.M.
N.M.
11
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
N.M.
N.M.
12
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
N.M.
N.M.
13
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
N.M.
14
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
15
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
≤–100
05615–068
M
0
≤–100
–21.6
–50.0
–74.8
≤–100
≤–100
≤–100
≤–100
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
1950 MHz SPUR TABLE
N
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0
≤–100
–10.8
–48.2
–72.3
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
1
–13.1
–7.0
–61.2
–71.4
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
2
–32.8
–25.3
–41.2
–83.6
–91.4
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
3
–22.4
–27.7
–44.6
–64.5
–84.2
–90.8
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
4
N.M.
–33.9
–47.0
–62.4
–78.3
–82.3
≤–100
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
M
7
N.M.
N.M.
N.M.
N.M.
–92.0
–83.8
–94.5
–94.0
≤–100
≤–100
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
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Rev. 0 | Page 4 of 24
15
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
≤–100
≤–100
≤–100
≤–100
≤–100
05615–069
Table 4.
ADL5350
ABSOLUTE MAXIMUM RATINGS
Table 5.
Parameter
Supply Voltage, VS
RF Input Level
LO Input Level
Internal Power Dissipation
θJA
Maximum Junction Temperature
Operating Temperature Range
Storage Temperature Range
Rating
4.0 V
23 dBm
20 dBm
324 mW
154.3°C/W
135°C
−40°C to +85°C
−65°C to +150°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
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Rev. 0 | Page 5 of 24
ADL5350
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
RF/IF 1
8 RF/IF
GND2 2
ADL5350
LOIN 3
TOP VIEW
(Not to Scale)
NC 4
7 NC
6 VPOS
NC = NO CONNECT
05615-002
5 GND1
Figure 2. Pin Configuration
Table 6. Pin Function Descriptions
Pin No.
1, 8
Mnemonic
RF/IF
2, 5, Paddle
3
4, 7
6
GND2, GND1, GND
LOIN
NC
VPOS
Description
RF and IF Input/Output Ports. These nodes are internally tied together. RF and IF port separation is
achieved using external tuning networks.
Device Common (DC Ground).
LO Input. Needs to be ac-coupled.
No Connect. Grounding NC pins is recommended.
Positive Supply Voltage for the Drain of the LO Buffer. A series RF choke is needed on the supply line
to provide proper ac loading of the LO buffer amplifier.
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Rev. 0 | Page 6 of 24
ADL5350
TYPICAL PERFORMANCE CHARACTERISTICS
850 MHz CHARACTERISTICS
23
19
22
18
21
17
20
16
15
14
13
19
18
17
16
12
15
11
14
10
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
13
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
Figure 3. Supply Current vs. Temperature
05615-006
INPUT P1dB (dBm)
20
05615-003
SUPPLY CURRENT (mA)
Supply voltage = 3 V, RF frequency = 850 MHz, IF frequency = 70 MHz, RF level = 0 dBm, LO level = 4 dBm, TA = 25°C, unless otherwise noted.
Figure 6. Input P1dB vs. Temperature
10
22
9
20
SUPPLY CURRENT (mA)
CONVERSION LOSS (dB)
8
7
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6
5
4
3
2
18
+25°C
16
14
–40°C
+85°C
12
–20
0
20
40
60
80
TEMPERATURE (°C)
10
2.7
05615-004
0
–40
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.4
3.5
SUPPLY VOLTAGE (V)
Figure 4. Conversion Loss vs. Temperature
05615-007
1
Figure 7. Supply Current vs. Supply Voltage
28
7.4
27
7.2
CONVERSION LOSS (dB)
26
24
23
22
21
7.0
+85°C
6.8
+25°C
6.6
–40°C
6.4
20
18
–40
–20
0
20
40
60
TEMPERATURE (°C)
80
6.0
2.7
2.8
2.9
3.0
3.1
3.2
3.3
SUPPLY VOLTAGE (V)
Figure 5. Input IP3 (IIP3) vs. Temperature
Figure 8. Conversion Loss vs. Supply Voltage
Rev. 0 | Page 7 of 24
05615-008
6.2
19
05615-005
INPUT IP3 (dBm)
25
ADL5350
Supply voltage = 3 V, RF frequency = 850 MHz, IF frequency = 70 MHz, RF level = 0 dBm, LO level = 4 dBm, TA = 25°C, unless otherwise noted.
28
22
27
20
SUPPLY CURRENT (mA)
+85°C
25
+25°C
24
18
–40°C
16
14
+85°C
+25°C
23
2.9
3.0
3.1
3.2
3.3
3.4
3.5
SUPPLY VOLTAGE (V)
10
750
775
800
825
850
Figure 9. Input IP3 vs. Supply Voltage
925
950
975
7.6
7.4
22
CONVERSION LOSS (dB)
7.2
21
INPUT P1dB (dBm)
900
Figure 12. Supply Current vs. RF Frequency
23
–40°C
20
+25°C
19
+85°C
18
+85°C
7.0
6.8
+25°C
6.6
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17
6.4
–40°C
6.2
6.0
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
SUPPLY VOLTAGE (V)
5.8
750
05615-010
16
2.7
875
RF FREQUENCY (MHz)
05615-012
2.8
05615-009
22
2.7
12
800
850
900
950
RF FREQUENCY (MHz)
Figure 10. Input P1dB vs. Supply Voltage
05615-013
INPUT IP3 (dBm)
–40°C
26
Figure 13. Conversion Loss vs. RF Frequency
27.0
8.0
26.5
26.0
+85°C
25.5
INPUT IP3 (dBm)
7.0
6.5
6.0
–40°C
+25°C
25.0
24.5
24.0
23.5
23.0
5.5
5.0
2.7
2.8
2.9
3.0
3.1
3.2
3.3
SUPPLY VOLTAGE (V)
3.4
3.5
22.0
750
775
800
825
850
875
900
925
RF FREQUENCY (MHz)
Figure 14. Input IP3 vs. RF Frequency
Figure 11. Noise Figure vs. Supply Voltage
Rev. 0 | Page 8 of 24
950
975
05615-014
22.5
05615-011
NOISE FIGURE (dB)
7.5
ADL5350
Supply voltage = 3 V, RF frequency = 850 MHz, IF frequency = 70 MHz, RF level = 0 dBm, LO level = 4 dBm, TA = 25°C, unless otherwise noted.
23
9
+85°C
8
22
+25°C
–40°C
20
+25°C
19
+85°C
18
17
–40°C
5
4
3
2
775
800
825
850
875
900
925
950
975
RF FREQUENCY (MHz)
0
25
100
125
150
175
200
225
250
225
250
Figure 18. Conversion Loss vs. IF Frequency
8
28
7
27
INPUT IP3 (dBm)
6
NOISE FIGURE (dB)
75
IF FREQUENCY (MHz)
Figure 15. Input P1dB vs. RF Frequency
5
4
26
–40°C
+25°C
25
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3
2
+85°C
24
23
1
775
800
825
850
875
900
925
950
975
RF FREQUENCY (MHz)
22
25
05615-016
0
750
50
05615-018
1
05615-015
16
750
6
50
75
100
125
150
175
200
IF FREQUENCY (MHz)
Figure 16. Noise Figure vs. RF Frequency
05615-019
INPUT P1dB (dBm)
CONVERSION LOSS (dB)
7
21
Figure 19. Input IP3 vs. IF Frequency
22
23
+25°C
22
21
–40°C
14
12
+25°C
19
18
+85°C
17
10
8
25
–40°C
20
50
75
100
125
150
175
200
IF FREQUENCY (MHz)
225
250
Figure 17. Supply Current vs. IF Frequency
16
25
50
75
100
125
150
175
200
IF FREQUENCY (MHz)
Figure 20. Input P1dB vs. IF Frequency
Rev. 0 | Page 9 of 24
225
250
05615-020
+85°C
16
INPUT P1dB (dBm)
18
05615-017
SUPPLY CURRENT (mA)
20
ADL5350
Supply voltage = 3 V, RF frequency = 850 MHz, IF frequency = 70 MHz, RF level = 0 dBm, LO level = 4 dBm, TA = 25°C, unless otherwise noted.
10
27
–40°C
9
25
+25°C
+85°C
23
7
INPUT IP3 (dBm)
NOISE FIGURE (dB)
8
6
5
4
3
21
19
17
2
100
150
200
250
300
13
–6
05615-021
0
50
350
IF FREQUENCY (MHz)
–4
–2
0
2
4
6
8
10
12
8
10
12
LO LEVEL (dBm)
Figure 21. Noise Figure vs. IF Frequency
05615-024
15
1
Figure 24. Input IP3 vs. LO Level
18
22
16
–40°C
21
20
12
INPUT P1dB (dBm)
10
+85°C
8
–40°C
6
4
+25°C
–2
+85°C
17
16
0
2
4
6
8
10
12
LO LEVEL (dBm)
15
–6
05615-022
–4
18
www.BDTIC.com/ADI
2
0
–6
+25°C
19
–4
–2
0
2
4
6
LO LEVEL (dBm)
Figure 22. Supply Current vs. LO Level
05615-025
SUPPLY CURRENT (mA)
14
Figure 25. Input P1dB vs. LO Level
20
12
11
18
10
NOISE FIGURE (dB)
16
+25°C
14
12
10
6
–6
8
7
6
5
–4
–2
0
2
4
6
8
LO LEVEL (dBm)
10
12
Figure 23. Conversion Loss vs. LO Level
4
–2
0
2
4
6
LO LEVEL (dBm)
Figure 26. Noise Figure vs. LO Level
Rev. 0 | Page 10 of 24
8
10
05615-026
8
9
+85°C
05615-023
CONVERSION LOSS (dB)
–40°C
ADL5350
Supply voltage = 3 V, RF frequency = 850 MHz, IF frequency = 70 MHz, RF level = 0 dBm, LO level = 4 dBm, TA = 25°C, unless otherwise noted.
–13
0
–2
–14
RF LEAKAGE (dBc)
IF FEEDTHROUGH (dBc)
–4
–15
–16
–17
–18
–40°C
+25°C
–6
–8
–10
–12
–14
–19
–16
–20
825
850
875
900
925
950
975
RF FREQUENCY (MHz)
Figure 27. IF Feedthrough vs. RF Frequency
–20
630
680
730
780
+25°C
–25
+85°C
–30
www.BDTIC.com/ADI
–40°C
–45
680
705
730
755
780
805
830
855
LO FREQUENCY (MHz)
880
905
05615-028
IF FEEDTHROUGH (dBc)
–20
–40
880
Figure 29. RF Leakage vs. LO Frequency
–15
–35
830
LO FREQUENCY (MHz)
Figure 28. IF Feedthrough vs. LO Frequency
Rev. 0 | Page 11 of 24
930
05615-029
800
05615-027
–18
+85°C
–21
750
775
ADL5350
1950 MHz CHARACTERISTICS
23
19
22
18
21
17
20
16
15
14
13
19
18
17
16
12
15
11
14
10
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
13
–40
–20
0
Figure 30. Supply Current vs. Temperature
40
60
80
Figure 33. Input P1dB vs. Temperature
10
22
9
+25°C
20
SUPPLY CURRENT (mA)
8
CONVERSION LOSS (dB)
20
TEMPERATURE (°C)
05615-033
INPUT P1dB (dBm)
20
05615-030
SUPPLY CURRENT (mA)
Supply voltage = 3 V, RF frequency = 1950 MHz, IF frequency = 190 MHz, RF level = −10 dBm, LO level = 6 dBm, TA = 25°C,
unless otherwise noted.
7
18
www.BDTIC.com/ADI
6
5
4
3
2
+85°C
–40°C
16
14
12
–20
0
20
40
60
80
TEMPERATURE (°C)
10
2.7
05615-031
0
–40
2.8
2.9
3.0
Figure 31. Conversion Loss vs. Temperature
3.2
3.3
3.4
3.5
3.4
3.5
Figure 34. Supply Current vs. Supply Voltage
7.4
28
27
7.2
CONVERSION LOSS (dB)
26
25
24
23
22
21
+85°C
7.0
+25°C
6.8
–40°C
6.6
6.4
20
6.2
18
–40
–20
0
20
40
TEMPERATURE (°C)
60
80
6.0
2.7
2.8
2.9
3.0
3.1
3.2
3.3
SUPPLY VOLTAGE (V)
Figure 35. Conversion Loss vs. Supply Voltage
Figure 32. Input IP3 vs. Temperature
Rev. 0 | Page 12 of 24
05615-035
19
05615-032
INPUT IP3 (dBm)
3.1
SUPPLY VOLTAGE (V)
05615-034
1
ADL5350
Supply voltage = 3 V, RF frequency = 1950 MHz, IF frequency = 190 MHz, RF level = −10 dBm, LO level = 6 dBm, TA = 25°C,
unless otherwise noted.
28
22
27
20
SUPPLY CURRENT (mA)
+85°C
26
+25°C
25
–40°C
24
16
14
2.9
3.0
3.1
3.2
3.3
3.4
3.5
SUPPLY VOLTAGE (V)
10
1800 1825 1850 1875 1900 1925 1950 1975 2000 2025 2050
05615-036
2.8
RF FREQUENCY (MHz)
Figure 36. Input IP3 vs. Supply Voltage
Figure 39. Supply Current vs. RF Frequency
20
7.6
7.4
+25°C
7.2
CONVERSION LOSS (dB)
19
INPUT P1dB (dBm)
+85°C
12
23
22
2.7
–40°C
18
05615-039
INPUT IP3 (dBm)
+25°C
–40°C
+85°C
18
+85°C
7.0
+25°C
6.8
www.BDTIC.com/ADI
17
–40°C
6.6
6.4
6.2
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
SUPPLY VOLTAGE (V)
5.8
1800 1825 1850 1875 1900 1925 1950 1975 2000 2025 2050
05615-037
16
2.7
RF FREQUENCY (MHz)
Figure 37. Input P1dB vs. Supply Voltage
05615-040
6.0
Figure 40. Conversion Loss vs. RF Frequency
8.0
27.0
26.5
26.0
+85°C
25.5
INPUT IP3 (dBm)
7.0
6.5
6.0
25.0
+25°C
24.5
–40°C
24.0
23.5
23.0
5.5
2.8
2.9
3.0
3.1
3.2
3.3
SUPPLY VOLTAGE (V)
3.4
3.5
Figure 38. Noise Figure vs. Supply Voltage
22.0
1800 1825 1850 1875 1900 1925 1950 1975 2000 2025 2050
RF FREQUENCY (MHz)
Figure 41. Input IP3 vs. RF Frequency
Rev. 0 | Page 13 of 24
05615-041
22.5
5.0
2.7
05615-038
NOISE FIGURE (dB)
7.5
ADL5350
Supply voltage = 3 V, RF frequency = 1950 MHz, IF frequency = 190 MHz, RF level = −10 dBm, LO level = 6 dBm, TA = 25°C,
unless otherwise noted.
9
23
8
22
+85°C
CONVERSION LOSS (dB)
7
20
–40°C
+25°C
19
18
+85°C
6
+25°C
–40°C
5
4
3
2
17
1
RF FREQUENCY (MHz)
0
50
05615-042
16
1800 1825 1850 1875 1900 1925 1950 1975 2000 2025 2050
75 100 125 150 175 200 225 250 275 300 325 350 375
IF FREQUENCY (MHz)
05615-045
INPUT P1dB (dBm)
21
Figure 45. Conversion Loss vs. IF Frequency
Figure 42. Input P1dB vs. RF Frequency
28
10
9
27
+85°C
7
INPUT IP3 (dBm)
NOISE FIGURE (dB)
8
6
26
+25°C
25
www.BDTIC.com/ADI
5
4
24
–40°C
3
23
RF FREQUENCY (MHz)
22
50
05615-043
1
1800 1825 1850 1875 1900 1925 1950 1975 2000 2025 2050
75 100 125 150 175 200 225 250 275 300 325 350 375
IF FREQUENCY (MHz)
05615-046
2
Figure 46. Input IP3 vs. IF Frequency
Figure 43. Noise Figure vs. RF Frequency
23
22
+25°C
22
21
–40°C
16
14
20
–40°C
19
12
18
10
17
+85°C
8
50
75 100 125 150 175 200 225 250 275 300 325 350 375
IF FREQUENCY (MHz)
16
50
75 100 125 150 175 200 225 250 275 300 325 350 375
IF FREQUENCY (MHz)
Figure 47. Input P1dB vs. IF Frequency
Figure 44. Supply Current vs. IF Frequency
Rev. 0 | Page 14 of 24
+25°C
05615-047
+85°C
INPUT P1dB (dBm)
18
05615-044
SUPPLY CURRENT (mA)
20
ADL5350
Supply voltage = 3 V, RF frequency = 1950 MHz, IF frequency = 190 MHz, RF level = −10 dBm, LO level = 6 dBm, TA = 25°C,
unless otherwise noted.
12
27
+85°C
23
8
INPUT IP3 (dBm)
6
4
–40°C
21
19
17
2
100
150
200
250
300
13
–6
05615-048
0
50
350
IF FREQUENCY (MHz)
–4
–2
4
6
8
10
12
8
10
12
Figure 51. Input IP3 vs. LO Level
22
25
24
20
+25°C
–40°C
23
18
22
16
+85°C
14
INPUT P1dB (dBm)
–40°C
12
21
20
+25°C
19
www.BDTIC.com/ADI
10
8
6
18
17
16
+85°C
15
4
14
2
13
–4
–2
0
2
4
6
8
10
12
LO LEVEL (dBm)
12
–6
05615-049
0
–6
–4
–2
0
2
4
6
LO LEVEL (dBm)
Figure 49. Supply Current vs. LO Level
05615-052
SUPPLY CURRENT (mA)
2
LO LEVEL (dBm)
Figure 48. Noise Figure vs. IF Frequency
Figure 52. Input P1dB vs. LO Level
20
12
–40°C
11
18
+25°C
10
NOISE FIGURE (dB)
16
+85°C
14
12
10
8
6
–6
9
8
7
6
5
–4
–2
0
2
4
6
8
LO LEVEL (dBm)
10
12
05615-050
CONVERSION LOSS (dB)
0
05615-051
15
Figure 50. Conversion Loss vs. LO Level
4
–2
0
2
4
6
LO LEVEL (dBm)
Figure 53. Noise Figure vs. LO Level
Rev. 0 | Page 15 of 24
8
10
05615-053
NOISE FIGURE (dB)
+25°C
25
10
ADL5350
0
–9
–2
–10
–4
–40°C
–12
–13
+85°C
–6
–8
–10
+25°C
–14
–12
–15
1800 1825 1850 1875 1900 1925 1950 1975 2000 2025 2050
–14
1560
RF FREQUENCY (MHz)
Figure 54. IF Feedthrough vs. RF Frequency
1610
1660
1710
1760
1810
Figure 56. RF Leakage vs. LO Frequency
–8
–9
–11
–12
–14
–15
www.BDTIC.com/ADI
–40°C
–16
–17
+85°C
+25°C
–18
1610 1635 1660 1685 1710 1735 1760 1785 1810 1835 1860
LO FREQUENCY (MHz)
05615-055
IF FEEDTHROUGH (dBc)
–10
–13
1860
LO FREQUENCY (MHz)
Figure 55. IF Feedthrough vs. LO Frequency
Rev. 0 | Page 16 of 24
1910
1960
05615-056
–11
RF LEAKAGE (dBc)
–8
05615-054
IF FEEDTHROUGH (dBc)
Supply voltage = 3 V, RF frequency = 1950 MHz, IF frequency = 190 MHz, RF level = −10 dBm, LO level = 6 dBm, TA = 25°C,
unless otherwise noted.
ADL5350
FUNCTIONAL DESCRIPTION
CIRCUIT DESCRIPTION
IMPLEMENTATION PROCEDURE
The ADL5350 is a GaAs pHEMT, single-ended, passive
mixer with an integrated LO buffer amplifier. The device
relies on the varying drain to source channel conductance
of a FET junction to modulate an RF signal. A simplified
schematic is shown in Figure 57.
The ADL5350 is a simple single-ended mixer that relies
on off-chip circuitry to achieve effective RF dynamic
performance. The following steps should be followed
to achieve optimum performance (see Figure 58 for
component designations):
VS
RF
INPUT
OR OUTPUT
VS
IF
L2
VPOS
C2
L4
RF
IF
LOIN
IF
OUTPUT
OR INPUT
8
7
6
5
RF/IF
NC
VPOS
GND1
RF/IF
1
GND2
2
ADL5350
GND2
LOIN
3
RF
Figure 57. Simplified Schematic
L1
NC
4
L3
C1
C3
The LO signal is applied to the gate contact of a FET-based
buffer amplifier. The buffer amplifier provides sufficient
gain of the LO signal to drive the resistive switch. Additionally,
feedback circuitry provides the necessary bias to the FET
buffer amplifier and RF/IF ports to achieve optimum
modulation efficiency for common cellular frequencies.
LO
05615-058
GND1
05615-057
LO
INPUT
C4
C6
Figure 58. Reference Schematic
1. Table 7 shows the recommended LO bias inductor
values for a variety of LO frequencies. To ensure efficient
commutation of the mixer, the bias inductor needs to
be properly set. For other frequencies within the range
shown, the values can be interpolated. For frequencies
outside this range, see the Applications Information section.
www.BDTIC.com/ADI
The mixing of RF and LO signals is achieved by switching
the channel conductance from the RF/IF port to ground at
the rate of the LO. The RF signal is passed through an external
band-pass network to help reject image bands and reduce
the broadband noise presented to the mixer. The bandlimited RF signal is presented to the time-varying load of
the RF/IF port, which causes the envelope of the RF signal
to be amplitude modulated at the rate of the LO. A filter
network applied to the IF port is necessary to reject the
RF signal and pass the wanted mixing product. In a downconversion application, the IF filter network is designed to
pass the difference frequency and present an open circuit
to the incident RF frequency. Similarly, for an upconversion
application, the filter is designed to pass the sum frequency
and reject the incident RF. As a result, the frequency response
of the mixer is determined by the response characteristics
of the external RF/IF filter networks.
Table 7. Recommended LO Bias Inductor
Desired LO Frequency (MHz)
380
750
1000
1750
2000
1
Rev. 0 | Page 17 of 24
Recommended LO Bias
Inductor, L41 (nH)
68
24
18
3.8
2.1
The bias inductor should have a self-resonant frequency greater than
the intended frequency of operation.
ADL5350
If a better than −10 dB return loss is desired, it may be
necessary to add a shunt resistor to ground before the
coupling capacitor (C3) to present a lower loading
impedance to the LO source. In doing so, a slightly
greater LO drive level may be required.
2. Tune the LO port input network for optimum return
loss. Typically, a band-pass network is used to pass the
LO signal to the LOIN pin. It is recommended to block
high frequency harmonics of the LO from the mixer
core. LO harmonics cause higher RF frequency images
to be downconverted to the desired IF frequency and
result in sensitivity degradation. If the intended LO
source has poor harmonic distortion and spectral purity,
it may be necessary to employ a higher order band-pass
filter network. Figure 58 illustrates a simple LC bandpass filter used to pass the fundamental frequency of the
LO source. Capacitor C3 is a simple dc block, while the
Series Inductor L3, along with the gate-to-source
capacitance of the buffer amplifier, form a low-pass
network. The native gate input of the LO buffer (FET)
alone presents a rather high input impedance. The gate
bias is generated internally using feedback that can result
in a positive return loss at the intended LO frequency.
3. Design the RF and IF filter networks. Figure 58 depicts
simple LC tank filter networks for the IF and RF port
interfaces. The RF port LC network is designed to pass
the RF input signal. The series LC tank has a resonant
frequency at 1/(2π√LC). At resonance, the series reactances
are canceled, which presents a series short to the RF
signal. A parallel LC tank is used on the IF port to reject
the RF and LO signals. At resonance, the parallel LC tank
presents an open circuit.
It is necessary to account for the board parasitics, finite
Q, and self-resonant frequencies of the LC components
when designing the RF, IF, and LO filter networks. Table 8
provides suggested values for initial prototyping.
Table 8. Suggested RF, IF, and LO Filter Networks for Low-Side LO Injection
RF Frequency (MHz)
450
850
1950
2400
1
L1 (nH) 1
8.3
6.8
1.7
0.67
C1 (pF)
10
4.7
1.5
1
L2 (nH)
10
4.7
1.7
1.5
C2 (pF)
10
5.6
1.2
0.7
L3 (nH)
10
8.2
3.5
3.0
www.BDTIC.com/ADI
C3 (pF)
100
100
100
100
The inductor should have a self-resonant frequency greater than the intended frequency of operation. L1 should be a high Q inductor for optimum NF performance.
Rev. 0 | Page 18 of 24
ADL5350
APPLICATIONS INFORMATION
LOW FREQUENCY APPLICATIONS
HIGH FREQUENCY APPLICATIONS
The ADL5350 can be used in low frequency applications. The
circuit in Figure 59 is designed for an RF of 136 MHz to 176 MHz
and an IF of 45 MHz using a high-side LO. The series and
parallel resonant circuits are tuned for 154 MHz, which is
the geometric mean of the desired RF frequencies. The
performance of this circuit is depicted in Figure 60.
The ADL5350 can be used at extended frequencies with
some careful attention to board and component parasitics.
Figure 61 is an example of a 2560 MHz to 2660 MHz downconversion using a low-side LO. The performance of this circuit
is depicted in Figure 62. Note that the inductor and capacitor
values are very small, especially for the RF and IF ports. Above
2.5 GHz, it is necessary to consider alternate solutions to avoid
unreasonably small inductor and capacitor values.
3V
4.7µF
3V
100nF
8
7
6
5
RF/IF
NC
VPOS
GND1
LOIN
3
ALL INDUCTORS
ARE 0302CS
SERIES FROM
COILCRAFT
NC
4
1nF
8
7
6
5
RF/IF
NC
VPOS
GND1
RF/IF
1
GND2
2
0.67nH
RF
05615-061
LO
NC
4
3.0nH
www.BDTIC.com/ADI
100pF
LO
12
Figure 61. 2560 MHz to 2660 MHz RF Downconversion Schematic
IIP3
10
8
25
6
LOSS
20
4
IP1dB
15
10
136
146
156
166
0
176
RF FREQUENCY (MHz)
13
IIP3
25
05615-065
2
14
30
IP1dB, IIP3 (dBm)
30
35
CONVERSION LOSS (dB)
35
IP1dB, IIP3 (dBm)
LOIN
3
1pF
Figure 59. 136 MHz to 176 MHz RF Downconversion Schematic
40
2.1nH
ADL5350
36nH
27pF
0.7pF
12
20
15
10
10
9
LOSS
5
8
0
2560
Figure 60. Measured Performance for Circuit in Figure 59
Using High-Side LO Injection and 45 MHz IF
11
IP1dB
CONVERSION LOSS (dB)
GND2
2
1nF
1.5nH
ADL5350
RF/IF
1
100pF
IF
100nH
27pF
2580
2600
2620
2640
7
2660
RF FREQUENCY (MHz)
05615-066
ALL INDUCTORS
ARE 0603CS
SERIES FROM
COILCRAFT
+
36nH
RF
4.7µF
10nF
05615-062
IF
Figure 62. Measured Performance for Circuit in Figure 61
Using Low-Side LO Injection and 374 MHz IF
The typical networks used for cellular applications below
2.6 GHz use band-select and band-reject networks on the RF
and IF ports. At higher RF frequencies, these networks are not
easily realized by using lumped element components. As a result, it
is necessary to consider alternate filter network topologies to
allow more reasonable values for inductors and capacitors.
Rev. 0 | Page 19 of 24
ADL5350
Classic audio crossover filter design techniques can be applied
to help derive component values. However, some caution must be
applied when selecting component values. At high RF frequencies,
the board parasitics can significantly influence the final optimum
inductor and capacitor component selections. Some empirical
testing may be necessary to optimize the RF and IF port filter
networks. The performance of the circuit depicted in Figure 63
is provided in Figure 64.
30
3V
+
CAC
100pF
L2
1.5nH
3.8nH
8
7
6
5
RF/IF
NC
VPOS
GND1
RF/IF
1
GND2
2
ADL5350
LOIN
3
RF
NC
4
12
20
10
IP1dB
15
8
LOSS
10
6
5
4
2.2nH
C1
1.2pF
100pF
LO
0
3300
05615-064
L1
3.5nH
IIP3
25
100pF
3400
3500
3600
3700
2
3800
RF FREQUENCY (MHz)
Figure 64. Measured Performance for Circuit in Figure 63
Using Low-Side LO Injection and 800 MHz IF
Figure 63. 3.3 GHz to 3.8 GHz RF Downconversion Schematic
When designing the RF port and IF port networks, it is
important to remember that the networks share a common
node (the RF/IF pins). In addition, the opposing network presents
some loading impedance to the target network being designed.
www.BDTIC.com/ADI
Rev. 0 | Page 20 of 24
05615-067
C2
1.8pF
IP1dB, IIP3 (dBm)
IF
ALL
INDUCTORS
ARE 0302CS
SERIES FROM
COILCRAFT
14
4.7µF
CONVERSION LOSS (dB)
Figure 63 depicts a crossover filter network approach to provide
isolation between the RF and IF ports for a downconverting
application. The crossover network essentially provides a highpass filter to allow the RF signal to pass to the RF/IF node (Pin 1
and Pin 8), while presenting a low-pass filter (which is actually
a band-pass filter when considering the dc blocking capacitor,
CAC). This allows the difference component (fRF − fLO) to be
passed to the desired IF load.
ADL5350
EVALUATION BOARD
An evaluation board is available for the ADL5350. The evaluation board has two halves: a low band board designated as Board A
and a high band board designated as Board B. The schematic for the evaluation board is shown in Figure 65.
VPOS-A
VPOS-B
IF-A
IF-B
C4-A
C6-A
L2-A
+
C5-B
+
C5-A
C2-A
L2-B
L4-A
C4-B
C6-B
C2-B
L4-B
8
7
6
5
8
7
6
5
RF/IF
NC
VPOS
GND1
RF/IF
NC
VPOS
GND1
U1-A
U1-B
ADL5350
GND2
2
RF-A
LOIN
3
NC
4
GND2
2
RF-B
L3-A
L1-A C1-A
RF/IF
1
NC
4
L3-B
L1-B C1-B
C3-A
LO-A
LOIN
3
C3-B
LO-B
05615-059
RF/IF
1
ADL5350
Figure 65. Evaluation Board
Table 9. Evaluation Board Configuration Options
Component
C4-A, C4-B,
C5-A, C5-B
L1-A, L1-B,
C1-A, C1-B
Function
Supply Decoupling. C4-A and C4-B provide local bypassing of the supply.
C5-A and C5-B are used to filter the ripple of a noisy supply line. These are not
always necessary.
RF Input Network. Designed to provide series resonance at the intended
RF frequency.
Default Conditions
C4-A = C4-B = 100 pF,
C5-A = C5-B = 4.7 μF
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L2-A, L2-B,
C2-A, C2-B,
C6-A, C6-B
IF Output Network. Designed to provide parallel resonance at the geometric mean
of the RF and LO frequencies.
L3-A, L3-B,
C3-A, C3-B
LO Input Network. Designed to block dc and optimize LO voltage swing at LOIN.
L4-A, L4-B
LO Buffer Amplifier Choke. Provides bias and ac loading impedance to LO buffer
amplifier.
Rev. 0 | Page 21 of 24
L1-A = 6.8 nH (0603CS from Coilcraft),
L1-B = 1.7 nH (0302CS from Coilcraft),
C1-A = 4.7 pF, C1-B = 1.5 pF
L2-A = 4.7 nH (0603CS from Coilcraft),
L2-B = 1.7 nH (0302CS from Coilcraft),
C2-A = 5.6 pF, C2-B = 1.2 pF,
C6-A = C6-B = 1 nF
L3-A = 8.2 nH (0603CS from Coilcraft),
L3-B = 3.5 nH (0302CS from Coilcraft),
C3-A = C3-B = 100 pF
L4-A = 24 nH (0603CS from Coilcraft),
L4-B = 3.8 nH (0302CS from Coilcraft)
ADL5350
OUTLINE DIMENSIONS
1.89
1.74
1.59
3.25
3.00
2.75
1.95
1.75
1.55
TOP VIEW
12° MAX
5 BOTTOM VIEW
* 8
EXPOSED PAD
4
2.95
2.75
2.55
PIN 1
INDICATOR
1.00
0.85
0.80
0.60
0.45
0.30
2.25
2.00
1.75
0.55
0.40
0.30
0.15
0.10
0.05
1
0.50 BSC
0.25
0.20
0.15
0.80 MAX
0.65 TYP
0.05 MAX
0.02 NOM
SEATING
PLANE
0.30
0.23
0.18
0.20 REF
Figure 66. 8-Lead Lead Frame Chip Scale Package [LFCSP_VD]
2 mm × 3 mm Body, Very Thin, Dual Lead
(CP-8-1)
Dimensions shown in millimeters
ORDERING GUIDE
Model
ADL5350ACPZ-R7 1
ADL5350ACPZ-WP1
ADL5350-EVALZ1
1
Temperature Range
−40°C to +85°C
−40°C to +85°C
Package Description
8-Lead Lead Frame Chip Scale Package [LFCSP_VD]
8-Lead Lead Frame Chip Scale Package [LFCSP_VD]
Evaluation Board
Package
Option
CP-8-1
CP-8-1
Branding
08
08
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Z = RoHS Compliant Part.
Rev. 0 | Page 22 of 24
Ordering
Quantity
3000, Reel
50, Waffle Pack
ADL5350
NOTES
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Rev. 0 | Page 23 of 24
ADL5350
NOTES
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©2008 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D05615-0-2/08(0)
Rev. 0 | Page 24 of 24