MAX4484/MAX4486/MAX4487 Single/Dual/Quad, Low-Cost, Single-Supply 7MHz, Rail-to-Rail Op Amps General Description

19-1823, Rev 0; 10/00
Single/Dual/Quad, Low-Cost, Single-Supply
7MHz, Rail-to-Rail Op Amps
________________________Applications
____________________________Features
♦ 7MHz Unity-Gain Stable Bandwidth
♦ Stable for Capacitive Loads up to 100pF
♦ +2.7V to +5.5V Single-Supply Voltage Range
♦ Ground-Sensing Inputs
♦ Outputs Swing Rail-to-Rail
♦ No Phase Reversal for Overdriven Inputs
♦ 85dB AVOL with 2kΩ Load
♦ 0.01% THD with 2kΩ Load
♦ Available in Space-Saving Packages
5-Pin SC70 (MAX4484)
8-Pin SOT23 (MAX4486)
Single-Supply Zero-Crossing Detector
Ordering Information
Instruments and Terminals
TEMP.
RANGE
PART
Portable Communicators
Electronic Ignition Modules
PINPACKAGE
TOP
MARK
MAX4484AXK-T
-40°C to +125°C
5 SC70-5
ABQ
Infrared Receivers for Remote Controls
MAX4484AUK-T
-40°C to +125°C
5 SOT23-5
ADPE
Sensor Signal Detection
MAX4486AKA-T
-40°C to +125°C
8 SOT23-8
AAEP
MAX4486ASA
-40°C to +125°C
8 SO
MAX4486AUA
-40°C to +125°C
8 µMAX
—
MAX4487AUD
-40°C to +125°C
14 TSSOP
—
MAX4487ASD
-40°C to +125°C
14 SO
—
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
—
Pin Configurations/Functional Diagrams
IN+ 1
5 VDD
VSS 2
4 OUT
IN- 3
SC70-5/SOT23-5
MAX4487
MAX4486
MAX4484
OUTA 1
8 VDD
OUTA 1
14 OUTD
INA- 2
7 OUTB
INA- 2
13 IND-
INA+ 3
6 INB-
INA+ 3
12 IND+
VSS 4
5 INB+
VDD 4
11 VSS
INB+ 5
10 INC+
INB- 6
9 INC-
OUTB 7
8 OUTC
SOT23-8/SO-8/µMAX
SO-14/TSSOP-14
________________________________________________________________ Maxim Integrated Products
1
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or visit Maxim’s website at www.maxim-ic.com.
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MAX4484/MAX4486/MAX4487
General Description
The MAX4484/MAX4486/MAX4487 single/dual/quad
low-cost general-purpose op amps operate from a single +2.7V to +5.5V supply. The op amps are unity-gain
stable with a 7MHz gain-bandwidth product, capable of
driving an external 2kΩ load with Rail-to-Rail® output
swing. The amplifiers are stable with capacitive loads of
up to 100pF. The MAX4484/MAX4486/MAX4487 are
specified from -40°C to +125°C, making them suitable
for a variety of harsh environments, such as automotive.
The single MAX4484 is available in the ultra-small 5-pin
SC70, while the dual MAX4486 is packaged in the
space-saving 8-pin SOT23 and µMAX packages. The
quad MAX4487 is available in the 14-pin SO and
TSSOP packages.
MAX4484/MAX4486/MAX4487
Single/Dual/Quad, Low-Cost, Single-Supply
7MHz, Rail-to-Rail Op Amps
ABSOLUTE MAXIMUM RATINGS
Power Supply Voltage (VDD to VSS) .........................-0.3V to +6V
All Other Pins....................................(VSS - 0.3V) to (VDD + 0.3V)
Output Short-Circuit Duration (OUT shorted
to VDD or VSS)...........................................................Continuous
Continuous Power Dissipation (TA = +70°C)
5-Pin SC70 (derate 3.1mW/°C above +70°C) ..............247mW
5-Pin SOT23 (derate 7.1mW/°C above +70°C) ...........571mW
8-Pin SOT23 (derate 9.1mW/°C above +70°C)............727mW
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
8-Pin µMAX (derate 4.5mW//°C above +70°C) ............362mW
14-Pin TSSOP (derate 9.1mW/°C above +70°C) .........727mW
14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW
Operating Temperature Range .........................-55°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS—TA = +25°C
(VDD = +5.0V, VSS = 0, VCM = 0, VOUT = VDD/2, RL = ∞ to VDD/2, unless otherwise noted.)
PARAMETER
Supply Voltage Range
VDD
Supply Current per Amplifier
IDD
Input Offset Voltage
VOS
CONDITIONS
MIN
Inferred from PSRR test
TYP
2.7
MAX UNITS
5.5
VDD = +2.7V
1.9
VDD = +5.0V
2.2
3.5
MAX4484
±0.3
±5.0
MAX4486
±0.3
±7.0
V
mA
mV
MAX4487
±0.3
±9.0
IB
(Note 1)
±0.1
100
Input Offset Current
IOS
(Note 1)
±0.1
100
Input Resistance
RIN
Differential or common mode
1000
Input Common-Mode Voltage
Range
VCM
Inferred from CMRR test
Common-Mode Rejection Ratio
CMRR
VSS ≤ VCM ≤ VDD - 1.3V
67
83
dB
Power-Supply Rejection
Ratio
PSRR
+2.7V ≤ VDD ≤ +5.5V
70
85
dB
Large-Signal Voltage Gain
AVOL
VSS + 0.3V ≤ VOUT ≤ VDD 0.3V
Output Voltage High
VOH
Specified as |VDD - VOH|
Output Voltage Low
VOL
Specified as |VOL - VSS|
Output Short-Circuit Current
ISC
Input Bias Current
Gain-Bandwidth Product
2
SYMBOL
VSS
RL = 100kΩ
RL = 2kΩ
VDD 1.3
RL = 100kΩ
3
15
RL = 100kΩ
1
RL = 2kΩ
20
Sourcing
27
Sinking
33
V
dB
85
RL = 2kΩ
pA
GΩ
98
76
pA
50
50
mV
mV
mA
GBW
7
MHz
Phase Margin
φm
55
degrees
Gain Margin
Gm
12
dB
Slew Rate
SR
20
Input Voltage Noise Density
en
f = 10kHz
29
V/µs
nV/√Hz
Input Current Noise Density
in
f = 10kHz
1
fA/√Hz
_______________________________________________________________________________________
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Single/Dual/Quad, Low-Cost, Single-Supply
7MHz, Rail-to-Rail Op Amps
(VDD = +5.0V, VSS = 0, VCM = 0, VOUT = VDD/2, RL = ∞ to VDD/2, unless otherwise noted.)
PARAMETER
Capacitive-Load Stability
SYMBOL
CLOAD
CONDITIONS
MIN
AV = +1V/V (Note 1)
TYP
MAX UNITS
100
pF
Power-On Time
tON
1
µs
Input Capacitance
CIN
2
pF
Total Harmonic Distortion
THD
Settling Time to 0.01%
tS
f = 10kHz, VOUT = 2Vp-p,
AV = +1V/V
RL = 100kΩ
0.006
RL = 2kΩ
0.01
VOUT = 4V step, AV = +1V/V
%
450
ns
ELECTRICAL CHARACTERISTICS—TA = -40°C to +125°C
(VDD = +5.0V, VSS = 0, VCM = 0, VOUT = VDD/2, RL = ∞ to VDD/2, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
Supply Voltage Range
VDD
Supply Current per Amplifier
IDD
Input Offset Voltage
VOS
CONDITIONS
MIN
Inferred from PSRR test
TYP
2.7
UNITS
5.5
V
4.0
mA
MAX4484
±8.5
MAX4486
±10.0
mV
±11.0
MAX4487
Input Offset Voltage Drift
MAX
±6
TCVOS
µV/°C
IB
(Note 1)
±100
pA
Input Offset Current
IOS
(Note 1)
±100
pA
Input Common-Mode Voltage
Range
VCM
Inferred from CMRR test
Input Bias Current
Common-Mode Rejection Ratio
CMRR
VSS ≤ VCM ≤ VDD 1.4V
Power-Supply Rejection Ratio
PSRR
+2.7V ≤ VDD ≤ +5.5V
Large-Signal Voltage Gain
AVOL
Output Voltage High
Output Voltage Low
VSS
VDD - 1. 4
TA = -40°C to +85°C
65
TA = -40°C to +125°C
62
TA = -40°C to +85°C
67
TA = -40°C to +125°C
64
VSS + 0.3V ≤ VOUT ≤
VDD - 0.3V, RL = 2kΩ
TA = -40°C to +85°C
66
TA = -40°C to +125°C
62
VOH
|VDD - VOUT|,
RL = 2kΩ
TA = -40°C to +85°C
100
TA = -40°C to +125°C
100
VOL
|VOUT - VSS|
RL = 2kΩ
TA = -40°C to +85°C
100
TA = -40°C to +125°C
250
V
dB
dB
dB
mV
mV
Note 1: Guaranteed by design.
Note 2: Specifications are 100% tested at TA = +25°C (exceptions marked). All temperature limits are guaranteed by design.
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3
MAX4484/MAX4486/MAX4487
ELECTRICAL CHARACTERISTICS—TA = +25°C (continued)
Typical Operating Characteristics
(VDD = +5V, VSS = 0, VCM = VDD/2, RL = ∞ to VDD/2, unless otherwise noted.)
-80
-120
-160
-200
100
1k
-40
100k
1M
10M
-20
PHASE
-80
100M
-30
-40
-50
-120
-200
10k
MAX4484 toc02
0
-160
AVCL = +1000
-10
GAIN
PSRR (dB)
PHASE
0
-60
-70
CL = 100pF
AVCL = +1000
100
1k
-80
10k
100k
1M
10M
1
100M
10
100
1k
10k
100k
1M 10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
SUPPLY CURRENT vs. TEMPERATURE
OUTPUT IMPEDANCE vs. FREQUENCY
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
1k
2.0
1.5
1.0
0.8
0.7
0.6
100
VOS (mV)
OUTPUT IMPEDANCE (Ω)
2.5
0.9
MAX4484 toc06
10k
MAX4484 toc04
3.0
MAX4484 toc05
GAIN (dB) PHASE (DEGREES)
0
CURRENT (mA)
40
GAIN (dB) PHASE (DEGREES)
GAIN
-40
80
MAX4484 toc01
80
40
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
GAIN AND PHASE vs.
FREQUENCY WITH CAPACITIVE LOAD
MAX4484 toc03
GAIN AND PHASE vs.
FREQUENCY (CL = 0)
10
0.5
0.4
0.3
1
0.2
0.5
0.1
0
0.1
0
0.01
-40
-20
0
20
40
60 80 100 120
100
1k
10k
TEMPERATURE (°C)
1M
10M
35
25
20
15
0
20
40
60
80 100 120
NONINVERTING SMALLSIGNAL TRANSIENT RESPONSE
MAX4484 toc09
12
10
|VOUT - VSS| (mV)
30
-20
MAX4484 toc08
RL = 2k
-40
TEMPERATURE (°C)
OUTPUT VOLTAGE LOW
vs. TEMPERATURE
MAX4484 toc07
40
IN
8
50mV/div
RL = 2k
6
4
OUT
2
10
0
-40 -20
0
20
40
60
TEMPERATURE (°C)
4
100k
FREQUENCY (Hz)
OUTPUT VOLTAGE HIGH
vs. TEMPERATURE
|VDD - VOUT| (mV)
MAX4484/MAX4486/MAX4487
Single/Dual/Quad, Low-Cost, Single-Supply
7MHz, Rail-to-Rail Op Amps
80 100 120
-40 -20
0
20 40 60 80 100 120
TEMPERATURE (°C)
1µs/div
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Single/Dual/Quad, Low-Cost, Single-Supply
7MHz, Rail-to-Rail Op Amps
PERCENT OVERSHOOT
vs. CAPACITIVE LOAD
MAX4484 toc10
LARGE-SIGNAL GAIN
vs. OUTPUT VOLTAGE LOW
OUT
30
RL = 100k
100
90
NEGATIVE
25
GAIN (dB)
PERCENT OVERSHOOT (%)
2V/div
110
MAX4484 toc11
35
IN
MAX4484 toc12
NONINVERTING LARGE-SIGNAL
TRANSIENT RESPONSE
20
80
70
RL = 2k
60
POSITIVE
15
50
10
40
LARGE-SIGNAL GAIN
vs. OUTPUT VOLTAGE HIGH
RL = 2k
70
120
0
85
-60
250
10k
100k
1M
10M
100M
1.0
0.01
0.001
0.1
1
10
FREQUENCY (kHz)
100
1000
2.5
3.0
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. AMPLITUDE
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. AMPLITUDE
0.14
f = 10kHz
AVCL = +1
RL = 100k
0.12
0.10
0.08
0.06
0.08
0.06
0.04
0.04
0.02
0.02
0
0
0.01
2.0
SUPPLY VOLTAGE (V)
THD + N (%)
AVCL = +1
1.5
FREQUENCY (Hz)
0.10
THD + N (%)
THD + N (%)
1k
f = 10kHz
AVCL = +1
RL = 2k
0.12
0.1
TA = +125°C
40
0.14
MAX4484 toc16
RL = 100k
60
45
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
1
TA = -40°C
65
50
100
300
70
55
MAX4484 toc17
100
150
200
|VDD - VOUT| (mV)
TA = +25°C
80
-70
50
300
90
60
0
250
75
-50
-90
200
POWER-SUPPLY REJECTION RATIO
vs. OPERATING VOLTAGE
-40
40
150
CROSSTALK vs. FREQUENCY
-30
-80
100
|VOUT - VSS| (mV)
-20
50
50
CLOAD (pF)
MAX4484 toc18
80
100
-10
CROSSTALK (dB)
GAIN (dB)
90
80
PSRR (dB)
100
60
MAX4484 toc14
RL = 100k
40
0
MAX4484 toc13
110
20
MAX4484 toc15
0
400ns/div
0
0.5
1.0
1.5
2.0
VIN (Vp-p)
2.5
3.0
3.5
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
VIN (Vp-p)
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5
MAX4484/MAX4486/MAX4487
Typical Operating Characteristics (continued)
(VDD = +5V, VSS = 0, VCM = VDD/2, RL = ∞ to VDD/2, unless otherwise noted.)
Single/Dual/Quad, Low-Cost, Single-Supply
7MHz, Rail-to-Rail Op Amps
MAX4484/MAX4486/MAX4487
Pin Description
PIN
NAME
FUNCTION
MAX4484
MAX4486
MAX4487
3
—
—
IN-
Inverting Amplifier Input
1
—
—
IN+
Noninverting Amplifier Input
4
—
—
OUT
Amplifier Output
—
2
2
INA-
Inverting Amplifier Input (Channel A)
—
3
3
INA+
Noninverting Amplifier Input (Channel A)
—
1
1
OUTA
Amplifier Output (Channel A)
—
6
6
INB-
Inverting Amplifier Input (Channel B)
—
5
5
INB+
Noninverting Amplifier Input (Channel B)
—
7
7
OUTB
Amplifier Output (Channel B)
—
—
9
INC-
Inverting Amplifier Input (Channel C)
—
—
10
INC+
Noninverting Amplifier Input (Channel C)
—
—
8
OUTC
Amplifier Output (Channel C)
—
—
13
IND-
Inverting Amplifier Input (Channel D)
—
—
12
IND+
Noninverting Amplifier Input (Channel D)
—
—
14
OUTD
Amplifier Output (Channel D)
2
4
11
VSS
Negative Power-Supply Voltage
5
8
4
VDD
Positive Power-Supply Voltage
Detailed Description
Applications Information
Rail-to-Rail Output Stage
Power Supplies and Layout
The MAX4484/MAX4486/MAX4487 can drive a 2kΩ
load and still swing within 50mV of the supply rails.
Figure 1 shows the output swing of the MAX4484 configured with AV = +1V/V.
The MAX4484/MAX4486/MAX4487 operates from a single +2.7V to +5.5V power supply. Bypass the power
supply with 0.1µF capacitor to ground.
Good layout techniques optimize performance by
decreasing the amount of stray capacitance at the op
amp’s inputs and outputs. To decrease stray capacitance, minimize trace lengths by placing external components close to the op amp’s pins. Use surface-mount
components for best results.
Driving Capacitive Loads
Driving a capacitive load can cause instability in many
op amps, especially those with low quiescent current.
The MAX4484/MAX4486/MAX4487 are unity-gain stable
for a range of capacitive loads up to 100pF. Figure 2
shows the response of the MAX4484 with an excessive
capacitive load. Adding a series resistor between the
output and the load capacitor (Figure 3) improves the
circuit’s response by isolating the load capacitance
from the op amp’s output.
6
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Single/Dual/Quad, Low-Cost, Single-Supply
7MHz, Rail-to-Rail Op Amps
CL
MAX4484
MAX4486
MAX4487
400µs/div
Figure 1. Rail-to-Rail Output Operation
Figure 3. Capacitive-Load-Driving Circuit
IN
Chip Information
50mV/div
TRANSISTOR COUNT: MAX4484: 101
MAX4486: 202
MAX4487: 404
OUT
1µs/div
Figure 2. Small-Signal Transient Response with Excessive
Capacitive Load (CL = 270pF)
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7
MAX4484/MAX4486/MAX4487
RISO
1V/div
Single/Dual/Quad, Low-Cost, Single-Supply
7MHz, Rail-to-Rail Op Amps
SC70, 5L.EPS
MAX4484/MAX4486/MAX4487
Package Information
8
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Single/Dual/Quad, Low-Cost, Single-Supply
7MHz, Rail-to-Rail Op Amps
SOT23, 8L.EPS
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9
MAX4484/MAX4486/MAX4487
Package Information (continued)
Single/Dual/Quad, Low-Cost, Single-Supply
7MHz, Rail-to-Rail Op Amps
SOT5L.EPS
MAX4484/MAX4486/MAX4487
Package Information (continued)
10
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Single/Dual/Quad, Low-Cost, Single-Supply
7MHz, Rail-to-Rail Op Amps
SOICN.EPS
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11
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MAX4484/MAX4486/MAX4487
Package Information (continued)
Single/Dual/Quad, Low-Cost, Single-Supply
7MHz, Rail-to-Rail Op Amps
TSSOP,NO PADS.EPS
MAX4484/MAX4486/MAX4487
Package Information (continued)
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2000 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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