General Description
The MAX4165–MAX4169 family of operational amplifiers combines excellent DC accuracy with high output
current drive, single-supply operation, and Rail-to-Rail
®
inputs and outputs. These devices operate from a single +2.7V to +6.5V supply, or from dual ±1.35V to
±3.25V supplies. They typically draw 1.2mA supply
current, and are guaranteed to deliver 80mA output
current.
The MAX4166/MAX4168 have a shutdown mode that
reduces supply current to 38µA per amplifier and
places the outputs into a high-impedance state. The
MAX4165–MAX4169’s precision performance combined with high output current, wide input/output
dynamic range, single-supply operation, and low power
consumption makes them ideal for portable audio
applications and other low-voltage, battery-powered
systems. The MAX4165 is available in the space-saving
5-pin SOT23 package.
________________________Applications
Portable/Battery-Powered Audio Applications
Portable Head-Phone Speaker Drivers
Laptop/Notebook Computers
Sound Ports/Cards
Set-Top Boxes
Cell Phones
Hands-Free Car Phones (kits)
Signal Conditioning
Digital-to-Analog Converter Buffers
Transformer/Line Drivers
Motor Drivers
____________________________Features
♦ 80mA (min) Output Drive Capability
♦ Rail-to-Rail Input Common-Mode Voltage Range
♦ Rail-to-Rail Output Voltage Swing
♦ 1.2mA Supply Current per Amplifier
♦ +2.7V to +6.5V Single-Supply Operation
♦ 5MHz Gain-Bandwidth Product
♦ 250µV Offset Voltage
♦ 120dB Voltage Gain (R
L
= 100kΩ)
♦ 88dB Power-Supply Rejection Ratio
♦ No Phase Reversal for Overdriven Inputs
♦ Unity-Gain Stable for Capacitive Loads to 250pF
♦ Low-Power Shutdown Mode:
Reduces Supply Current to 38µA
Places Outputs in High-Impedance State
♦ Available in 5-Pin SOT23 Package (MAX4165)
MAX4165–MAX4169
High-Output-Drive, Precision, Low-Power, Single-
Supply, Rail-to-Rail I/O Op Amps with Shutdown
________________________________________________________________
Maxim Integrated Products
1
V
EE
IN-
IN+
1
5
V
CC
OUT
MAX4165
SOT23-5
TOP VIEW
2
3
4
Pin Configurations
Selector Guide
19-1224; Rev 1; 10/97
PART
MAX4165EUK-T
MAX4166EPA
MAX4166ESA -40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
PIN-
PACKAGE
5 SOT23-5
8 Plastic DIP
8 SO
Ordering Information
Ordering Information continued at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
Pin Configurations continued at end of data sheet.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
For small orders, phone 408-737-7600 ext. 3468.
AMPS PER
PACKAGE
MAX4165 Single
MAX4166 Single
PART
MAX4167 Dual
MAX4168 Dual
SHUTDOWN
MODE
—
Yes
—
Yes
MAX4169 Quad —
MAX4166EUA -40°C to +85°C 8 µMAX
SOT
TOP
MARK
AABY
—
—
—
MAX4165–MAX4169
High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
Supply Voltage (VCCto VEE)....................................................7V
IN_+, IN_-,
SHDN_............................(VEE- 0.3V) + (VCC+ 0.3V)
OUT_ (shutdown mode) ...................(V
EE
- 0.3V) + (VCC+ 0.3V)
Output Short-Circuit Duration to V
CC
or VEE(Note 1)....Continuous
Continuous Power Dissipation (T
A
= +70°C)
5-Pin SOT23 (derate 7.10mW/°C above +70°C)...........571mW
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ....727mW
8-Pin SO (derate 5.88mW/°C above +70°C).................471mW
8-Pin µMAX (derate 4.10mW/°C above +70°C)............330mW
10-Pin µMAX (derate 5.60mW/°C above +70°C)..........444mW
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)...800mW
14-Pin SO (derate 8.33mW/°C above +70°C)...............667mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°C
DC ELECTRICAL CHARACTERISTICS
(VCC= +2.7V to +6.5V, VEE= 0V, VCM= 0V, V
OUT
= (VCC/ 2), RL= 100kΩ to (VCC/ 2), V
SHDN
≥ 2V, TA= +25°C, unless otherwise
noted.)
| V
IN
+ - VIN- | > 1.8V
| V
IN
+ - VIN- | ≤ 1.8V
VCM= VEEto V
CC
Inferred from CMRR test
CONDITIONS
2
R
IN(DIFF)
Differential Input Resistance kΩ
500
nA±1 ±15I
OS
Input Offset Current
VVEE- 0.25 VCC+ 0.25V
CM
Common-Mode Input
Voltage Range
V
SHDN
< 0.8V, V
OUT
= 0V to V
CC
A
VCL
= +1V/V
V
OUT
= 0.2V to 4.8V, RL= 100kΩ
µA±0.001 ±2I
OUT(SHDN)
Off-Leakage Current
in Shutdown
Ω0.1R
OUT
Output Resistance
72 93
72 93
MAX416_EPA/EPD
MAX416_ESA/ESD
0.35 1.5
0.25 0.85
VCC= 5VA
VOL
Large-Signal Voltage Gain
95 120
UNITSMIN TYP MAXSYMBOLPARAMETER
MAX416_EPA/EPD
0.25 0.85MAX416_ESA/ESD
VCM= VEEto V
CC
mV0.35 1.7V
OS
Input Offset Voltage MAX416_EUA/EUB
0.25 1.0
MAX416_EUK
MAX416_EUA/EUB
72 86
72 88
63 90
62 89
MAX416_EUK
MAX416_ESA/ESD
72 86
MAX416_EUA/EUB
70 88
MAX416_EUK
MAX4169E_D
VCC= 2.7V to 6.5VPSRRPower-Supply Rejection Ratio dB
V
OUT
= 0.6V to 4.4V, RL= 25Ω 71 83
dB
Note 1: Continuous power dissipation should also be observed.
71 93
dB
VEE- 0.25V <
VCM< (VCC+ 0.25V)
CMRR
Common-Mode
Rejection Ratio
72 88MAX416_EPA/EPD
VCM= VEEto V
CC
nA±50 ±150I
B
Input Bias Current
MAX4169E_D
MAX4169E_D
MAX4165–MAX4169
High-Output-Drive, Precision, Low-Power, Single-
Supply, Rail-to-Rail I/O Op Amps with Shutdown
_______________________________________________________________________________________ 3
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC= +2.7V to +6.5V, VEE= 0V, VCM= 0V, V
OUT
= (VCC/ 2), RL= 100kΩ to (VCC/ 2), V
SHDN
≥ 2V, TA= +25°C, unless otherwise
noted.)
DC ELECTRICAL CHARACTERISTICS
(VCC= +2.7V to +6.5V, VEE= 0V, VCM= 0V, V
OUT
= (VCC/ 2), RL= 100kΩ to (VCC/ 2), V
SHDN
≥ 2V, TA= -40°C to +85°C, unless
otherwise noted.) (Note 4)
VCC= 3V
VCC= 5V
Shutdown mode
VCC= 5V
VCC= 3V
V
IH
CONDITIONS
0.8
V
SHDN
< 0.8V
Inferred from PSRR test
VEE< V
SHDN
< V
CC
Normal mode
µA
38 49
V2.7 6.5V
CC
Operating Supply-Voltage
Range
µA±3.0
SHDN Input Bias Current
V
2.0
V
IL
SHDN Logic Threshold
(Note 3)
I
CC(SHDN)
Shutdown Supply Current
(per Amplifier)
58 75
mA
1.2 1.4
15 30
I
CC
Quiescent Supply Current
(per Amplifier)
1.3 1.5
UNITSMIN TYP MAXSYMBOLPARAMETER
10 25
VCC= 5V mV
160 350
V
OUT
Output Voltage Swing
340 430
V
OUT
= 0.6V to (VCC- 0.6V) mA±80 ±125
Output Source/Sink Current
(Note 2)
VCC- V
OH
RL= 100kΩ
VOL- V
EE
VCC- V
OH
VOL- V
EE
RL= 25Ω
VCM= VEEto V
CC
Inferred from CMRR test
VCM= VEEto V
CC
nA±225I
B
Input Bias Current
CONDITIONS
nA±21I
OS
Input Offset Current
VV
EE
- 0.15 VCC+ 0.15V
CM
Common-Mode Input
Voltage Range
71
71
MAX416_EPA/EPD
MAX416_ESA/ESD
4.3
1.0
UNITSMIN TYP MAXSYMBOLPARAMETER
MAX416_EPA/EPD
1.0MAX416_ESA/ESD
VCM= VEEto V
CC
mV
4.9
V
OS
Input Offset Voltage
MAX416_EUA/EUB
1.2
MAX416_EUK
MAX416_EUA/EUB
65
67
57
56
MAX416_EUK
MAX416_ESA/ESD
65
MAX416_EUA/EUB
66
MAX416_EUK
MAX4169E_D
VCC= 2.7V to 6.5VPSRRPower-Supply Rejection Ratio dB
µV/°C±3∆VOS/∆TOffset-Voltage Tempco
MAX4169E_D
VEE- 0.15V < VCM<
(VCC+ 0.15V)
69MAX4169E_D
dBCMRR
Common-Mode
Rejection Ratio
67MAX416_EPA/EPD
MAX4165–MAX4169
High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown
4 _______________________________________________________________________________________
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC= +2.7V to +6.5V, VEE= 0V, VCM= 0V, V
OUT
= (VCC/ 2), RL= 100kΩ to (VCC/ 2), V
SHDN
≥ 2V, TA= -40°C to +85°C, unless
otherwise noted.)
AC ELECTRICAL CHARACTERISTICS
(VCC= +2.7V to +6.5V, VEE= 0V, VCM= 0V, V
OUT
= (VCC/ 2), RL = 2.5kΩ to (VCC/ 2), V
SHDN
≥ 2V, CL= 15pF, TA= +25°C, unless
otherwise noted.)
VCC= 3V
VCC= 5V
VCC= 3V
Inferred from PSRR test
I
OUT(SHDN)
CONDITIONS
V
SHDN
< 0.8V
VEE< V
SHDN
< V
CC
V
SHDN
< 0.8V, V
OUT
= 0V to V
CC
VCC= 5V
µA
54
V2.7 6.5V
CC
Operating Supply-Voltage
Range
µA±3.5
SHDN Input Bias Current
µA±5
Off-Leakage Current
in Shutdown
I
CC(SHDN)
Shutdown Supply Current
(per Amplifier)
82
mA
1.6
I
CC
Quiescent Supply Current
(per Amplifier)
1.7
UNITSMIN TYP MAXSYMBOLPARAMETER
Slew Rate SR V/µs
Gain Margin GM dB
degrees
21
PMPhase Margin 68
Settling Time to 0.01% t
S
CONDITIONS
A
VCL
= +1V/V, 2V step µs
pFC
IN
Input Capacitance 3
f = 10kHz, V
OUT
= 2Vp-p, A
VCL
= +1V/V %
2.1
THDTotal Harmonic Distortion
Channel-to-Channel Isolation
0.005
Capacitive Load Stability
V
OUT
= 4Vp-p, VCC= 5V
f = 1kHz, RL= 100kΩ (MAX4167–MAX4169)
f = 1kHz
MHz5GBWPGain-Bandwidth Product
nV/√Hz
e
n
Input Voltage Noise Density 26
dB
f = 1kHz
pA/√Hz
125
i
n
Input Current Noise Density 0.4
A
VCL
= +1V/V, no sustained oscillations pF250
kHz
2
Shutdown Time
Enable Time from Shutdown
t
SHDN
µs1
t
ENABLE
FPBWFull-Power Bandwidth
µs1
260
Power-Up Time t
ON
µs5
UNITSMIN TYP MAXSYMBOLPARAMETER
V
OUT
= 0.6V to (VCC- 0.6V) mA±80
Output Source/Sink Current
(Note 2)
VCC= 5V
90
A
VOL
dB
66
Large-Signal Voltage Gain
V
OUT
= 0.2V to 4.8V, RL= 100kΩ
V
OUT
= 0.6V to 4.4V, RL= 25Ω
RL= 100kΩ
40
30
Output Voltage Swing VCC= 5V
490
RL= 25Ω
V
OUT
mV
400
VCC- V
OH
VOL- V
EE
VCC- V
OH
VOL- V
EE
Shutdown mode
V
IH
0.8
Normal mode
V
2.0
V
IL
SHDN Logic Threshold
(Note 3)
Note 2: Although the minimum output current is guaranteed to be ±80mA, exercise caution to ensure that the absolute maximum
power-dissipation rating of the package is not exceeded.
Note 3: SHDN logic thresholds are referenced to V
EE
.
Note 4: The MAX4165EUK is 100% tested at +25°C. All temperature limits are guaranteed by design.
MAX4165–MAX4169
High-Output-Drive, Precision, Low-Power, Single-
Supply, Rail-to-Rail I/O Op Amps with Shutdown
_______________________________________________________________________________________
5
70
-30
100 1k 10k 100k 1M 10M
GAIN AND PHASE vs. FREQUENCY
10
0
-10
-20
MAX4165-01
FREQUENCY (Hz)
GAIN (dB)
30
20
50
40
60
216
-144
0
-36
-72
-108
72
36
144
108
180
PHASE (DEGREES)
A
VCL
= +1000V/V
70
-30
100 1k 10k 100k 1M 10M
GAIN AND PHASE vs. FREQUENCY
(C
L
= 250pF)
-20
MAX4165-02
FREQUENCY (Hz)
GAIN (dB)
10
0
-10
50
40
30
20
60
216
-144
-108
0
-36
-72
144
108
72
36
180
PHASE (DEGREES)
A
VCL
= +1000V/V
C
L
= 250pF
10
-90
100 1k 10k 100k 1M 10M 100M
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
-70
-80
MAX4165-03A
FREQUENCY (Hz)
PSRR (dB)
-50
-60
-30
-40
-10
-20
0
A
VCL
= +1
1000
0.1
1 10 100 1k 10k
100k
1M 10M
OUTPUT IMPEDANCE vs. FREQUENCY
1
MAX4165-03B
FREQUENCY (Hz)
OUTPUT IMPEDANCE (Ω)
10
100
80
-60
0 7
INPUT BIAS CURRENT
vs. COMMON-MODE VOLTAGE
-40
60
MAX4165-06
COMMON-MODE VOLTAGE (V)
INPUT BIAS CURRENT (nA)
1 2 3 4 5 6
40
20
0
-20
VCC = +6.5V
VCC = +2.7V
1.6
0
-40 100
SUPPLY CURRENT PER AMPLIFIER
vs. TEMPERATURE
0.2
1.4
MAX4165-04
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
-20 0 20 40 60 80
1.2
1.0
0.8
0.6
0.4
VCC = +6.5V
VCC = +2.7V
80
0
-40 100
SHUTDOWN SUPPLY CURRENT
PER AMPLIFIER vs. TEMPERATURE
20
10
70
60
MAX4165-05
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
-20 0 20 40 60 80
50
40
30
VCC = +6.5V
VCC = +2.7V
80
-60
-40 100
INPUT BIAS CURRENT
vs. TEMPERATURE
-40
60
MAX4165-07
TEMPERATURE (°C)
INPUT BIAS CURRENT (nA)
-20 0 20 40 60 80
40
20
0
-20
VCC = +6.5V, VCM = V
CC
VCC = +2.7V, VCM = V
CC
VCC = +2.7V, VCM = V
EE
VCC = +6.5V, VCM = V
EE
2.25
-2.25
-40 80
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
-1.75
1.75
1.25
MAX4165-08
TEMPERATURE (°C)
VOLTAGE (mV)
-20
0 20 40 60
0.75
0.25
-0.75
-0.25
-1.25
SOT23-5
PACKAGE
SO PACKAGE
__________________________________________Typical Operating Characteristics
(VCC= +5.0V, VEE= 0V, RL= 100kΩ, TA = +25°C, unless otherwise noted.)
MAX4165–MAX4169
High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown
6 _______________________________________________________________________________________
____________________________Typical Operating Characteristics (continued)
(VCC= +5.0V, VEE= 0V, RL= 100kΩ, TA = +25°C, unless otherwise noted.)
2.00
1.75
-40 100
MINIMUM OPERATING VOLTAGE
vs. TEMPERATURE
1.80
1.95
MAX4165-09
TEMPERATURE (°C)
MINIMUM OPERATING VOLTAGE (V)
-20 0 20 40 60 80
1.90
1.85
88.0
84.0
84.5
-40 100
COMMON-MODE REJECTION RATIO
vs. TEMPERATURE
85.5
85.0
87.5
87.0
MAX4165-10
TEMPERATURE (°C)
CMRR (dB)
-20 0 20 40 60 80
86.5
86.0
140
0
20
0 0.6
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
(SINKING, V
CC
= 6.5V)
60
40
120
MAX4165-11
OUTPUT VOLTAGE (V)
LARGE-SIGNAL GAIN (dB)
0.1
0.2
0.3
0.4 0.5
100
80
RL = 100kΩ
RL = 1kΩ
RL = 100Ω
VCC = +6.5V
R
L
to V
CC
125
90
95
0 0.6
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
(SOURCING, V
CC
= 6.5V)
105
100
120
MAX4165-12
OUTPUT VOLTAGE (V)
LARGE-SIGNAL GAIN (dB)
0.1 0.2 0.3 0.4 0.5
115
110
RL = 100kΩ
RL = 1kΩ
RL = 100Ω
VCC = +6.5V
R
L
to V
EE
125
107
109
-40 100
LARGE-SIGNAL GAIN vs. TEMPERATURE
(R
L
= 100kΩ)
111
123
MAX4165-15a
TEMPERATURE (°C)
LARGE-SIGNAL GAIN (dB)
-20
0 20 40 60 80
121
119
117
115
113
VCC = +6.5V
R
L
to V
CC
or V
EE
VCC = +2.7V
R
L
to V
CC
or V
EE
V
OUTp-p
= VCC - 1V
R
L
= 100kΩ
110
60
65
-40 100
LARGE-SIGNAL GAIN vs. TEMPERATURE
(R
L
= 100Ω)
75
70
105
MAX4165-15
TEMPERATURE (°C)
LARGE-SIGNAL GAIN (dB)
-20
0 20 40 60 80
100
95
90
85
80
VCC = +2.7V
R
L
to V
EE
VCC = +2.7V
R
L
to V
CC
VCC = +6.5V
R
L
to V
CC
V
OUTp-p
= VCC - 1V
R
L
= 100Ω
VCC = +6.5V
R
L
to V
EE
120
0
20
0 0.40
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
(SINKING, V
CC
= 2.7V)
40
100
MAX4165-13
OUTPUT VOLTAGE (V)
LARGE-SIGNAL GAIN (dB)
0.05 0.10 0.15 0.20 0.25 0.30 0.35
80
60
RL = 100kΩ
RL = 100Ω
RL = 1kΩ
VCC = +2.7V
R
L
to V
CC
120
0
0 0.40
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
(SOURCING, V
CC
= 2.7V)
40
20
100
MAX4165-14
OUTPUT VOLTAGE (V)
LARGE-SIGNAL GAIN (dB)
0.05
0.15
0.10 0.20
0.25
0.30 0.36
80
60
VCC = +2.7V
R
L
to V
EE
RL = 100kΩ
RL = 100Ω
RL = 1kΩ
120
0
20
-40 100
OUTPUT VOLTAGE LOW
vs. TEMPERATURE
40
100
MAX4165-16
TEMPERATURE (°C)
V
OUT
- V
EE
(mV)
-20
0 20 40 60 80
80
60
VCC = +6.5V, RL = 100Ω
RL to V
CC
VCC = +2.7V, RL = 100Ω
VCC = +6.5V, RL = 100kΩ
VCC = +2.7V, RL = 100kΩ
MAX4165–MAX4169
High-Output-Drive, Precision, Low-Power, Single-
Supply, Rail-to-Rail I/O Op Amps with Shutdown
_______________________________________________________________________________________ 7
0.05
0
10 1k100 10k 100k
TOTAL HARMONIC DISTORTION
AND NOISE vs. FREQUENCY
0.01
MAX4165-18
FREQUENCY (Hz)
THD + NOISE (%)
0.02
0.03
0.04
V
OUT
= 2Vp-p
500kHz LOWPASS FILTER
R
L
= 10kΩ TO VCC / 2
1
0.001
4.0
4.6
4.8 5.0
TOTAL HARMONIC DISTORTION AND NOISE
vs. PEAK-TO-PEAK OUTPUT VOLTAGE
0.01
0.1
MAX4165-19
PEAK-TO-PEAK OUTPUT (V)
THD + NOISE (%)
4.2 4.4
RL = 250Ω
RL = 2kΩ
RL = 100kΩ
RL = 25Ω
f = 10kHz
R
L
to VCC / 2
IN
(50mV/div)
OUT
(50mV/div)
SMALL-SIGNAL TRANSIENT RESPONSE
(NONINVERTING)
MAX4165-20
TIME (500ns/div)
A
VCL
= +1V/V
130
80
1k 100k 1M10k 10M
CHANNEL-TO-CHANNEL ISOLATION
vs. FREQUENCY
90
85
MAX4165-19a
FREQUENCY (Hz)
CHANNEL-TO-CHANNEL ISOLATION (dB)
100
95
110
105
120
125
115
IN
(50mV/div)
OUT
(50mV/div)
SMALL-SIGNAL TRANSIENT RESPONSE
(INVERTING)
MAX4165-21
TIME (500ns/div)
A
VCL
= -1V/V
IN
(2V/div)
OUT
(2V/div)
LARGE-SIGNAL TRANSIENT RESPONSE
(NONINVERTING)
MAX4165-22
TIME (5µs/div)
A
VCL
= +1V/V
IN
(2V/div)
OUT
(2V/div)
LARGE-SIGNAL TRANSIENT RESPONSE
(INVERTING)
MAX4165-23
TIME (5µs/div)
A
VCL
= -1V/V
300
0
50
-40 100
OUTPUT VOLTAGE HIGH
vs. TEMPERATURE
250
MAX4165-17
TEMPERATURE (°C)
OUTPUT VOLTAGE HIGH
(mV)
-20 0 20 40 60 80
200
150
100
VCC = +6.5V, RL = 100Ω
VCC = +2.7V, RL = 100Ω
VCC = +6.5V OR + 2.7V, RL = 100kΩ
RL to V
EE
____________________________Typical Operating Characteristics (continued)
(VCC= +5.0V, VEE= 0V, RL= 100kΩ, TA = +25°C, unless otherwise noted.)
MAX4165–MAX4169
High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown
8 _______________________________________________________________________________________
Pin Description
No Connection. Not internally connected.1, 5—
Negative Supply. Ground for singlesupply operation.
42
Outputs for Amplifiers 1 and 2——
Inverting Inputs for Amplifiers 1 and 2—
Noninverting Inputs for Amplifiers 1 and 2——
Inverting Input24
Noninverting Input33
Active-Low Shutdown Inputs for
Amplifiers 1 and 2. Drive low for shutdown mode. Drive high or connect to
VCCfor normal operation.
——
Positive Supply75
Outputs for Amplifiers 3 and 4——
Noninverting Inputs for Amplifiers 3 and 4——
PIN
Inverting Inputs for Amplifiers 3 and 4——
Output61
MAX4168
MAX4165
Active-Low Shutdown Input. Drive low
for shutdown mode. Drive high or connect to VCCfor normal operation.
8—
—
4
1, 7
2, 6
3, 5
—
—
—
8
—
—
—
—
FUNCTION
—
5, 7, 8, 10
4
1, 13
2, 12
3, 11
—
—
6, 9
14
—
—
—
—
MAX4166
—
—
4
1, 9
2, 8
3, 7
—
—
5, 6
10
—
—
—
—
MAX4167
—
—
11
1, 7
2, 6
3, 5
—
—
—
4
8, 14
10, 12
9, 13
—
—
N.C.
V
EE
OUT1,
OUT2
IN1-,
IN2-
IN1+,
IN2+
IN-
IN+
SHDN1,
SHDN2
V
CC
OUT3,
OUT4
IN3+,
IN4+
IN3-,
IN4-
OUT
DIP/SO
SHDN
µMAX
MAX4169
NAME
MAX4165–MAX4169
High-Output-Drive, Precision, Low-Power, Single-
Supply, Rail-to-Rail I/O Op Amps with Shutdown
_______________________________________________________________________________________ 9
Applications Information
Package Power Dissipation
Warning: Due to the high output current drive, this op
amp can exceed the absolute maximum power-dissipation rating. As a general rule, as long as the peak cur-
rent is less than or equal to 80mA, the maximum package
power dissipation will not be exceeded for any of the
package types offered. There are some exceptions to this
rule, however. The absolute maximum power-dissipation
rating of each package should always be verified using
the following equations. The following equation gives an
approximation of the package power dissipation:
where: V
RMS
= the RMS voltage from VCCto V
OUT
when sourcing current
= the RMS voltage from V
OUT
to V
EE
when sinking current
I
RMS
= the RMS current flowing out of or into
the op amp and the load
θ = the phase difference between the
voltage and the current. For resistive
loads, COS θ = 1.
For example, the circuit in Figure 1 has a package
power dissipation of 157mW.
Therefore, P
IC(DISS)
= V
RMSIRMS
COS θ
= 157mW
Adding a coupling capacitor improves the package
power dissipation because there is no DC current to
the load, as shown in Figure 2.
Therefore, P
IC(DISS)
= V
RMSIRMS
COS θ
= 38.6mW
The absolute maximum power-dissipation rating of this
package would be exceeded if the configuration in
Figure 1 were used with all four of the MAX4169ESD’s
amplifiers at a high ambient temperature of +75°C
(157mW x 4 amplifiers = 628mW + a derating of
8.33mW/°C x 5°C = 669mW). Note that 669mW just
exceeds the absolute maximum power dissipation of
667mW for the 14-pin SO package (see the
Absolute
Maximum Ratings
section).
V V V
I +
I
2
RMS CC DC
RMS
PEAK
≅ −
( )
−
= − − =
≅ = +
=
. .
.
.
. /
.
V
V V
V
V
I A
V
mA
PEAK
RMS
DC
2
6 5 3 25
1 5
2
2 189
0
1 5 60
2
17 67
Ω
V V V
I +
I
2
RMS CC DC
RMS
PEAK
≅ −
( )
−
= − − =
≅ = +
=
. .
.
.
.
. /
.
V
V V
V
V
I
V V
mA
PEAK
RMS
DC
RMS
2
6 5 3 25
1 5
2
2 189
3 25
60
1 5 60
2
71 84
Ω
Ω
P V I COS
IC DISS RMS RMS
( )
≅ θ
6.5V
V
IN
= 3Vp-p
R
C
60Ω
R
MAX4165
MAX4166
Figure 1. A Circuit Example where the MAX4165/MAX4166 is
Being Used in Single-Supply Operation
6.5V
V
IN
= 3Vp-p
R
60Ω
R
C
C
C
CC = 1
2π R
L fL
MAX4165
MAX4166
Figure 2. A Circuit Example where Adding a Coupling
Capacitor Greatly Reduces the Power Dissipation of Its
Package
MAX4165–MAX4169
High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown
10 ______________________________________________________________________________________
Single-Supply Speaker Driver
The MAX4165/MAX4166 can be used as a single-supply speaker driver, as shown in the
Typical Operating
Circuit
. Capacitor C1 is used for blocking DC (a 0.1µF
ceramic capacitor can be used). When choosing resistors R3 and R4, take into consideration the input bias
current as well as how much supply current can be tolerated. Choose resistors R1 and R2 according to the
amount of gain and current desired. Capacitor C3
ensures unity gain for DC. A 10µF electrolytic capacitor
is suitable for most applications. The coupling capacitor C2 sets a low-frequency pole and is fairly large in
value. For a 32Ω load, a 100µF coupling capacitor
gives a low-frequency pole at 50Hz. The low-frequency
pole can be set according to the following equation:
ƒ = 1 / 2π (RLC2)
Bridge Amplifier
The circuit shown in Figure 3 uses a dual MAX4167/
MAX4168 to implement a 3V, 200mW amplifier suitable
for use in size-constrained applications. This configuration eliminates the need for the large coupling capacitor required by the single op-amp speaker driver when
single-supply operation is a must. Voltage gain is set to
+10V/V; however, it can be changed by adjusting the
900kΩ resistor value. DC voltage at the speaker is limited to 10mV. The 47Ω and 0.1µF capacitors across the
speaker maintain a low impedance at the load as frequency increases.
Rail-to-Rail Input Stage
Devices in the MAX4165–MAX4169 family of high-output-current amplifiers have rail-to-rail input and output
stages designed for low-voltage, single-supply operation. The input stage consists of separate NPN and
PNP differential stages that combine to provide an
input common-mode range that extends 0.25V beyond
the supply rails. The PNP stage is active for input voltages close to the negative rail, and the NPN stage is
active for input voltages near the positive rail. The
switchover transition region, which occurs near VCC/ 2,
has been extended to minimize the slight degradation
in common-mode rejection ratio caused by mismatch of
the input pairs.
V
CC
= +3V
900k
V
CC
= +3V
V
CC
= +3V
47Ω
4.7k
4.7k
0.1µF
1µF
0.1µF
INPUT
0.25Vp-p
32Ω
100k
100k
100k
100k
100k
100k
1/2 MAX4167
1/2 MAX4168
1/2 MAX4167
1/2 MAX4168
Figure 3. Dual MAX4167/MAX4168 Bridge Amplifier for
200mW at 3V
R3
R3 = R1 R2
R1 R2
MAX4165
MAX4166
MAX4167
MAX4168
MAX4169
Figure 4. Reducing Offset Error Due to Bias Current
(Noninverting)
R3
R3 = R1 R2
R1 R2
MAX4165
MAX4166
MAX4167
MAX4168
MAX4169
Figure 5. Reducing Offset Error Due to Bias Current (Inverting)
MAX4165–MAX4169
High-Output-Drive, Precision, Low-Power, Single-
Supply, Rail-to-Rail I/O Op Amps with Shutdown
______________________________________________________________________________________ 11
Since the input stage switches between the NPN and
PNP pairs, the input bias current changes polarity as the
input voltage passes through the transition region. Match
the effective impedance seen by each input to reduce the
offset error caused by input bias currents flowing through
external source impedances (Figures 4 and 5).
High source impedances, together with input capacitance, can create a parasitic pole that produces an
underdamped signal response. Reducing the input
impedance or placing a small (2pF to 10pF) capacitor
across the feedback resistor improves response.
The MAX4165–MAX4169’s inputs are protected from large
differential input voltages by 1kΩ series resistors and
back-to-back triple diodes across the inputs (Figure 6).
For differential voltages less than 1.8V, input resistance is
typically 500kΩ. For differential input voltages greater
than 1.8V, input resistance is approximately 2kΩ. The
input bias current is given by the following equation:
I
BIAS
= (V
DIFF
- 1.8V) / 2kΩ
Rail-to-Rail Output Stage
The minimum output is within millivolts of ground for
single-supply operation, where the load is referenced
to ground (VEE). Figure 7 shows the input voltage range
and the output voltage swing of a MAX4165 connected
as a voltage follower. The maximum output voltage
swing is load dependent; however, it is guaranteed to
be within 430mV of the positive rail (VCC= 5V) even
with maximum load (25Ω to ground).
Driving Capacitive Loads
The MAX4165–MAX4169 have a high tolerance for
capacitive loads. They are stable with capacitive loads
up to 250pF. Figure 8 is a graph of the stable operating
region for various capacitive loads vs. resistive loads.
Figures 9 and 10 show the transient response with
excessive capacitive loads (1500pF), with and without
the addition of an isolation resistor in series with the
output. Figure 11 shows a typical noninverting capacitive-load-driving circuit in the unity-gain configuration.
The resistor improves the circuit’s phase margin by isolating the load capacitor from the op amp’s output.
1k
1k
Figure 6. Input Protection Circuit
IN
(1V/div)
OUT
(1V/div)
MAX4165-fig07
TIME (5µs/div)
VCC = +3.0V
R
L
= 100kΩ
Figure 7. Rail-to-Rail Input/Output Range
MAX4165–MAX4169
High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown
12 ______________________________________________________________________________________
Power-Up and Shutdown Modes
The MAX4166/MAX4168 have a shutdown option.
When the shutdown pin (SHDN) is pulled low, supply
current drops to 58µA per amplifier (VCC= +5V), the
amplifiers are disabled, and their outputs are placed in
a high-impedance state. Pulling SHDN high or leaving it
floating enables the amplifier. In the dual MAX4168, the
two amplifiers shut down independently. Figures 12
and 13 show the MAX4166’s output voltage and supply-current responses to a shutdown pulse. The
MAX4166–MAX4169 typically settle within 5µs after
power-up (Figure 14).
Power Supplies and Layout
The MAX4165–MAX4169 can operate from a single
+2.7V to +6.5V supply, or from dual ±1.35V to
±3.25V supplies. For single-supply operation, bypass
the power supply with a 0.1µF ceramic capacitor in
parallel with at least 1µF. For dual-supply operation,
bypass each supply to ground. Good layout improves
performance by decreasing the amount of stray capacitance at the op amps’ inputs and outputs. Decrease
stray capacitance by placing external components
close to the op amps’ pins, minimizing trace and lead
lengths.
1300
0
10 100k
100
200
300
400
1100
1200
MAX4165-fig08
RESISTIVE LOAD (kΩ)
CAPACITIVE LOAD (pF)
100 1k 10k
1000
900
800
700
600
500
STABLE REGION
V
CC
= +5.0V
R
L
to V
CC
/ 2
UNSTABLE REGION
Figure 8. Capacitive Load Stability
IN
(20mV/div)
OUT
(20mV/div)
MAX4165-fig09
TIME (1µs/div)
VCC = +3.0V, CL = 1500pF
R
L
= 100kΩ, R
ISO
= 0Ω
Figure 9. Small-Signal Transient Response with Excessive
Capacitive Load
IN
(20mV/div)
OUT
(20mV/div)
MAX4165-fig10
TIME (1µs/div)
VCC = +3.0V, CL = 1500pF
R
L
= 100kΩ, R
ISO
= 39Ω
Figure 10. Small-Signal Transient Response with Excessive
Capacitive Load with Isolation Resistor
R
ISO
C
L
Figure 11. Capacitive-Load-Driving Circuit
MAX4165–MAX4169
High-Output-Drive, Precision, Low-Power, Single-
Supply, Rail-to-Rail I/O Op Amps with Shutdown
______________________________________________________________________________________ 13
SHDN
(1V/div)
OUT
(1V/div)
MAX4165-fig12
TIME (5µs/div)
Figure 12. Shutdown Output Voltage Enable/Disable
SHDN
(1V/div)
I
CC
(1mA/div)
MAX4165-fig13
TIME (50µs/div)
Figure 13. Shutdown Enable/Disable Supply Current
V
CC
(1V/div)
OUT
(2V/div)
MAX4165-fig14
TIME (5µs/div)
Figure 14. Power-Up/Down Output Voltage
V
CC
(1V/div)
I
EE
(1mA/div)
MAX4165-fig15
TIME (5µs/div)
Figure 15. Power-Up/Down Supply Current
MAX4165–MAX4169
High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown
14 ______________________________________________________________________________________
Pin Configurations (continued)
OUT
N.C.
V
EE
1
2
87SHDN
V
CC
IN-
IN+
N.C.
DIP/SO/µMAX
TOP VIEW
3
4
6
5
MAX4166
IN2-
IN2+
V
EE
1
2
87V
CC
OUT2
IN1-
IN1+
OUT1
DIP/SO
3
4
6
5
MAX4167
1
2
3
4
5
10
9
8
7
6
V
CC
OUT2
IN2IN2+V
EE
IN1+
IN1-
OUT1
MAX4168
µMAX
SHDN2SHDN1
14
13
12
11
10
9
8
1
2
3
4
5
6
7
V
CC
OUT2
IN2IN2+V
EE
IN1+
IN1-
OUT1
MAX4168
N.C.
SHDN2
N.C.N.C.
SHDN1
N.C.
DIP/SO
14
13
12
11
10
9
8
1
2
3
4
5
6
7
OUT4
IN4IN4+
V
EE
V
CC
IN1+
IN1-
OUT1
MAX4169
IN3+
IN3OUT3OUT2
IN2-
IN2+
DIP/SO
MAX4165–MAX4169
High-Output-Drive, Precision, Low-Power, Single-
Supply, Rail-to-Rail I/O Op Amps with Shutdown
______________________________________________________________________________________ 15
Typical Operating Circuit
___________________Chip Information
Ordering Information (continued)
V
CC
R2
C2
C1
V
IN
32Ω
R4
R1
C3
R3
MAX4165
MAX4166
MAX4165 TRANSISTOR COUNT: 230
MAX4166 TRANSISTOR COUNT: 230
MAX4167 TRANSISTOR COUNT: 462
MAX4168 TRANSISTOR COUNT: 462
MAX4169 TRANSISTOR COUNT: 924
PART
MAX4167EPA
MAX4167ESA
MAX4168EPD
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
PIN-
PACKAGE
8 Plastic DIP
8 SO
14 Plastic DIP
MAX4168ESD -40°C to +85°C 14 SO
SOT
TOP
MARK
—
—
—
—
MAX4168EUB
MAX4169EPD
-40°C to +85°C
-40°C to +85°C 10 µMAX
14 Plastic DIP
MAX4169ESD -40°C to +85°C 14 SO
—
—
—
Package Information
8LUMAXD.EPS
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.
16
____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
MAX4165–MAX4169
High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown
Package Information (continued)
SOT5L.EPS
10LUMAXB.EPS
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