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19-1224; Rev 1; 10/97
High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown
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(R) 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 38A 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.
____________________________Features
o 80mA (min) Output Drive Capability o Rail-to-Rail Input Common-Mode Voltage Range o Rail-to-Rail Output Voltage Swing o 1.2mA Supply Current per Amplifier o +2.7V to +6.5V Single-Supply Operation o 5MHz Gain-Bandwidth Product o 250V Offset Voltage o 120dB Voltage Gain (RL = 100k) o 88dB Power-Supply Rejection Ratio o No Phase Reversal for Overdriven Inputs o Unity-Gain Stable for Capacitive Loads to 250pF o Low-Power Shutdown Mode: Reduces Supply Current to 38A Places Outputs in High-Impedance State o Available in 5-Pin SOT23 Package (MAX4165)
MAX4165-MAX4169
Selector Guide
PART MAX4165 MAX4166 MAX4167 MAX4168 MAX4169 AMPS PER PACKAGE Single Single Dual Dual Quad SHUTDOWN MODE -- Yes -- Yes --
Ordering Information
PART MAX4165EUK-T MAX4166EPA MAX4166ESA MAX4166EUA TEMP. RANGE -40C to +85C -40C to +85C -40C to +85C -40C to +85C PINPACKAGE 5 SOT23-5 8 Plastic DIP 8 SO 8 MAX SOT TOP MARK AABY -- -- --
________________________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
Typical Operating Circuit appears at end of data sheet. Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
Ordering Information continued at end of data sheet.
Pin Configurations
TOP VIEW
OUT 1 5 VCC
VEE 2
MAX4165
IN+ 3
4
IN-
SOT23-5
Pin Configurations continued at end of data sheet.
1
________________________________________________________________ Maxim Integrated Products
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High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown MAX4165-MAX4169
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC to VEE) ....................................................7V IN_+, IN_-, SHDN_............................(VEE - 0.3V) + (VCC + 0.3V) OUT_ (shutdown mode) ...................(VEE - 0.3V) + (VCC + 0.3V) Output Short-Circuit Duration to VCC or VEE (Note 1)....Continuous Continuous Power Dissipation (TA = +70C) 5-Pin SOT23 (derate 7.10mW/C above +70C)...........571mW 8-Pin Plastic DIP (derate 9.09mW/C above +70C) ....727mW 8-Pin SO (derate 5.88mW/C above +70C).................471mW Note 1: Continuous power dissipation should also be observed.
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.
8-Pin MAX (derate 4.10mW/C above +70C) ............330mW 10-Pin MAX (derate 5.60mW/C above +70C) ..........444mW 14-Pin Plastic DIP (derate 10.00mW/C above +70C)...800mW 14-Pin SO (derate 8.33mW/C above +70C)...............667mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C
DC ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +6.5V, VEE = 0V, VCM = 0V, VOUT = (VCC / 2), RL = 100k to (VCC / 2), V S HDN 2V, TA = +25C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MAX416_EPA/EPD MAX416_ESA/ESD Input Offset Voltage VOS VCM = VEE to VCC MAX416_EUA/EUB MAX416_EUK MAX4169E_D Input Bias Current Input Offset Current Differential Input Resistance Common-Mode Input Voltage Range IB IOS RIN(DIFF) VCM VCM = VEE to VCC VCM = VEE to VCC MIN TYP 0.25 0.25 0.35 0.35 0.25 50 1 500 2 VEE - 0.25 72 72 62 63 71 72 72 72 72 70 93 93 89 90 93 88 88 86 86 88 0.1 0.001 95 71 120 83 2 A dB dB dB VCC + 0.25 MAX 0.85 0.85 1.7 1.5 1.0 150 15 nA nA k V mV UNITS
| VIN+ - VIN- | 1.8V | VIN+ - VIN- | > 1.8V
Inferred from CMRR test MAX416_EPA/EPD MAX416_ESA/ESD
Common-Mode Rejection Ratio
CMRR
VEE - 0.25V < VCM < (VCC + 0.25V)
MAX416_EUA/EUB MAX416_EUK MAX4169E_D MAX416_EPA/EPD MAX416_ESA/ESD
Power-Supply Rejection Ratio
PSRR
VCC = 2.7V to 6.5V
MAX416_EUA/EUB MAX416_EUK MAX4169E_D
Output Resistance Off-Leakage Current in Shutdown Large-Signal Voltage Gain
ROUT IOUT(SHDN) AVOL
AVCL = +1V/V V SHDN < 0.8V, VOUT = 0V to VCC VCC = 5V VOUT = 0.2V to 4.8V, RL = 100k VOUT = 0.6V to 4.4V, RL = 25
2
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High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.7V to +6.5V, VEE = 0V, VCM = 0V, VOUT = (VCC / 2), RL = 100k to (VCC / 2), V S HDN 2V, TA = +25C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS RL = 100k Output Voltage Swing VOUT VCC = 5V RL = 25 Output Source/Sink Current (Note 2) SHDN Logic Threshold (Note 3) SHDN Input Bias Current Operating Supply-Voltage Range Quiescent Supply Current (per Amplifier) Shutdown Supply Current (per Amplifier) VCC ICC ICC(SHDN) VIL VIH VOUT = 0.6V to (VCC - 0.6V) Shutdown mode Normal mode VEE < V S HDN < VCC Inferred from PSRR test VCC = 5V VCC = 3V V S HDN < 0.8V VCC = 5V VCC = 3V 2.7 1.3 1.2 58 38 2.0 3.0 6.5 1.5 1.4 75 49 VCC - VOH VOL - VEE VCC - VOH VOL - VEE 80 MIN TYP 15 10 340 160 125 0.8 MAX 30 25 430 350 mA V A V mA A mV UNITS
MAX4165-MAX4169
DC ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +6.5V, VEE = 0V, VCM = 0V, VOUT = (VCC / 2), RL = 100k to (VCC / 2), V S HDN 2V, TA = -40C to +85C, unless otherwise noted.) (Note 4) PARAMETER SYMBOL CONDITIONS MAX416_EPA/EPD MAX416_ESA/ESD MAX416_EUA/EUB MAX416_EUK MAX4169E_D Offset-Voltage Tempco Input Bias Current Input Offset Current Common-Mode Input Voltage Range VOS/T IB IOS VCM VCM = VEE to VCC VCM = VEE to VCC Inferred from CMRR test MAX416_EPA/EPD MAX416_ESA/ESD MAX416_EUA/EUB MAX416_EUK MAX4169E_D MAX416_EPA/EPD MAX416_ESA/ESD MAX416_EUA/EUB MAX416_EUK MAX4169E_D VEE - 0.15 3 225 21 VCC + 0.15 71 71 56 57 69 67 67 65 65 66 MIN TYP MAX 1.0 1.0 4.9 4.3 1.2 V/C nA nA V UNITS
Input Offset Voltage
VOS
VCM = VEE to VCC
mV
Common-Mode Rejection Ratio
CMRR
VEE - 0.15V < VCM < (VCC + 0.15V)
dB
Power-Supply Rejection Ratio
PSRR
VCC = 2.7V to 6.5V
dB
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3
High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown MAX4165-MAX4169
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.7V to +6.5V, VEE = 0V, VCM = 0V, VOUT = (VCC / 2), RL = 100k to (VCC / 2), V S HDN 2V, TA = -40C to +85C, unless otherwise noted.) PARAMETER Off-Leakage Current in Shutdown Large-Signal Voltage Gain SYMBOL IOUT(SHDN) AVOL CONDITIONS V SHDN < 0.8V, VOUT = 0V to VCC V CC = 5V VOUT = 0.2V to 4.8V, RL = 100k VOUT = 0.6V to 4.4V, RL = 25 VCC - VOH RL = 100k VOL - VEE VCC - VOH RL = 25 VOL - VEE 90 66 40 30 490 400 80 0.8 2.0 3.5 2.7 6.5 1.7 1.6 82 54 MIN TYP MAX 5 UNITS A dB
Output Voltage Swing
VOUT
V CC = 5V
mV
Output Source/Sink Current (Note 2) SHDN Logic Threshold (Note 3) SHDN Input Bias Current Operating Supply-Voltage Range Quiescent Supply Current (per Amplifier) Shutdown Supply Current (per Amplifier) VCC ICC ICC(SHDN) VIL VIH
VOUT = 0.6V to (VCC - 0.6V) Shutdown mode Normal mode VEE < V S HDN < VCC Inferred from PSRR test VCC = 5V VCC = 3V V S HDN < 0.8V VCC = 5V VCC = 3V
mA V A V mA A
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 VEE. Note 4: The MAX4165EUK is 100% tested at +25C. All temperature limits are guaranteed by design.
AC ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +6.5V, VEE = 0V, VCM = 0V, VOUT = (VCC / 2), RL = 2.5k to (VCC / 2), V S HDN 2V, CL = 15pF, TA = +25C, unless otherwise noted.) PARAMETER Gain-Bandwidth Product Full-Power Bandwidth Slew Rate Phase Margin Gain Margin Total Harmonic Distortion Settling Time to 0.01% Input Capacitance Input Voltage Noise Density Input Current Noise Density Channel-to-Channel Isolation Capacitive Load Stability Shutdown Time Enable Time from Shutdown Power-Up Time 4 SYMBOL GBWP FPBW SR PM GM THD tS CIN en in CONDITIONS VOUT = 4Vp-p, VCC = 5V MIN TYP 5 260 2 68 21 0.005 2.1 3 26 0.4 125 250 1 1 5 MAX UNITS MHz kHz V/s degrees dB % s pF nV/Hz pA/Hz dB pF s s s
f = 10kHz, VOUT = 2Vp-p, AVCL = +1V/V AVCL = +1V/V, 2V step f = 1kHz f = 1kHz f = 1kHz, RL = 100k (MAX4167-MAX4169) AVCL = +1V/V, no sustained oscillations
t S HDN tENABLE tON
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High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown
__________________________________________Typical Operating Characteristics
(VCC = +5.0V, VEE = 0V, RL = 100k, TA = +25C, unless otherwise noted.)
MAX4165-MAX4169
GAIN AND PHASE vs. FREQUENCY
70 60 50 40 GAIN (dB) 30 20 10 0 -10 -20 -30 100 1k 10k 100k 1M FREQUENCY (Hz)
MAX4165-01
GAIN AND PHASE vs. FREQUENCY (CL = 250pF)
216 180 144 PHASE (DEGREES) 108 72 36 0 -36 -72 -108 -144 10M 70 60 50 40 GAIN (dB) 30 20 10 0 -10 -20 -30 100 1k 10k 100k 1M FREQUENCY (Hz)
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY
180 144 PHASE (DEGREES) 108 72 36 0 -36 -72 -108 -144 10M 0 -10 -20 PSRR (dB) -30 -40 -50 -60 -70 -80 -90 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) AVCL = +1
MAX4165-03A
MAX4165-02
216
10
AVCL = +1000V/V
AVCL = +1000V/V CL = 250pF
OUTPUT IMPEDANCE vs. FREQUENCY
MAX4165-03B
SUPPLY CURRENT PER AMPLIFIER vs. TEMPERATURE
MAX4165-04
SHUTDOWN SUPPLY CURRENT PER AMPLIFIER vs. TEMPERATURE
70 SUPPLY CURRENT (A) 60 50 40 30 20 10 0 VCC = +2.7V VCC = +6.5V
MAX4165-05
1000
1.6 1.4 SUPPLY CURRENT (mA) 1.2 1.0 0.8 0.6 0.4 0.2 VCC = +2.7V VCC = +6.5V
80
OUTPUT IMPEDANCE ()
100
10
1
0.1 1 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
0 -40 -20 0 20 40 60 80 100 TEMPERATURE (C)
-40
-20
0
20
40
60
80
100
TEMPERATURE (C)
INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE
MAX4165-06
INPUT BIAS CURRENT vs. TEMPERATURE
MAX4165-07
INPUT OFFSET VOLTAGE vs. TEMPERATURE
1.75 1.25 SOT23-5 PACKAGE
MAX4165-08
80 60 INPUT BIAS CURRENT (nA) VCC = +2.7V 40 20 0 -20 -40 -60 0 1 2 3 4 5 6 7 COMMON-MODE VOLTAGE (V) VCC = +6.5V
80 60 INPUT BIAS CURRENT (nA) 40 20 0 -20 -40 -60 -40 -20 0 20 40 60 80 VCC = +2.7V, VCM = VEE VCC = +6.5V, VCM = VEE VCC = +6.5V, VCM = VCC
2.25
VOLTAGE (mV)
VCC = +2.7V, VCM = VCC
0.75 0.25 -0.25 -0.75 -1.25 -1.75 -2.25 SO PACKAGE
100
-40
-20
0
20
40
60
80
TEMPERATURE (C)
TEMPERATURE (C)
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5
High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown MAX4165-MAX4169
____________________________Typical Operating Characteristics (continued)
(VCC = +5.0V, VEE = 0V, RL = 100k, TA = +25C, unless otherwise noted.)
MINIMUM OPERATING VOLTAGE vs. TEMPERATURE
MAX4165-09
COMMON-MODE REJECTION RATIO vs. TEMPERATURE
MAX4165-10
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE (SINKING, VCC = 6.5V)
RL = 100k 120 LARGE-SIGNAL GAIN (dB) 100 80 60 40 20 0 VCC = +6.5V RL to VCC 0 0.1 0.2 0.3 0.4 0.5 0.6 RL = 1k RL = 100
MAX4165-11 MAX4165-16 MAX4165-14
2.00 MINIMUM OPERATING VOLTAGE (V)
88.0 87.5 87.0 CMRR (dB)
140
1.95 86.5 86.0 85.5 85.0 1.80 84.5 1.75 -40 -20 0 20 40 60 80 100 TEMPERATURE (C) 84.0 -40 -20 0 20 40 60 80 100 TEMPERATURE (C)
1.90
1.85
OUTPUT VOLTAGE (V)
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE (SOURCING, VCC = 6.5V)
MAX4165-12
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE (SINKING, VCC = 2.7V)
RL = 100k RL = 1k RL = 100
MAX4165-13
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE (SOURCING, VCC = 2.7V)
120 100 LARGE-SIGNAL GAIN (dB) 80 RL = 100 60 40 20 0 0 0.05 0.10 0.15 0.20 0.25 0.30 0.36 0.40 OUTPUT VOLTAGE (V) VCC = +2.7V RL to VEE RL = 100k
125 120 LARGE-SIGNAL GAIN (dB) 115 110 105 100 95 90 0 0.1 0.2 0.3 0.4 0.5 VCC = +6.5V RL to VEE RL = 1k RL = 100 RL = 100k
120 100 LARGE-SIGNAL GAIN (dB) 80 60 40 20 0 VCC = +2.7V RL to VCC 0
RL = 1k
0.6
0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
LARGE-SIGNAL GAIN vs. TEMPERATURE (RL = 100)
105 LARGE-SIGNAL GAIN (dB) 100 95 90 85 80 75 70 65 60 -40 -20 0 20 40 60 80 100 TEMPERATURE (C) VCC = +6.5V VCC = +2.7V RL to VCC VCC = +2.7V RL to VCC RL to VEE VOUTp-p = VCC - 1V RL = 100 VCC = +6.5V RL to VEE
MAX4165-15
LARGE-SIGNAL GAIN vs. TEMPERATURE (RL = 100k)
123 LARGE-SIGNAL GAIN (dB) 121 VCC = +6.5V RL to VCC or VEE VOUT - VEE (mV) 119 117 115 113 111 109 107 -40 -20 0 20 40 60 80 100 TEMPERATURE (C) VCC = +2.7V RL to VCC or VEE VOUTp-p = VCC - 1V RL = 100k
MAX4165-15a
OUTPUT VOLTAGE LOW vs. TEMPERATURE
120 RL to VCC 100 VCC = +6.5V, RL = 100 80 60 VCC = +2.7V, RL = 100 40 VCC = +6.5V, RL = 100k 20 0 -40 -20 0 20 40 60 80 100 TEMPERATURE (C) VCC = +2.7V, RL = 100k
110
125
6
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High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown
____________________________Typical Operating Characteristics (continued)
(VCC = +5.0V, VEE = 0V, RL = 100k, TA = +25C, unless otherwise noted.)
OUTPUT VOLTAGE HIGH vs. TEMPERATURE
MAX4165-17
MAX4165-MAX4169
TOTAL HARMONIC DISTORTION AND NOISE vs. FREQUENCY
MAX4165-18
TOTAL HARMONIC DISTORTION AND NOISE vs. PEAK-TO-PEAK OUTPUT VOLTAGE
MAX4165-19
300 RL to VEE OUTPUT VOLTAGE HIGH (mV) 250 200 VCC = +2.7V, RL = 100 150 100 50 VCC = +6.5V OR + 2.7V, RL = 100k 0 -40 -20 0 20 40 60 80 VCC = +6.5V, RL = 100
0.05 VOUT = 2Vp-p 500kHz LOWPASS FILTER RL = 10k TO VCC / 2
1 RL = 25 THD + NOISE (%) 0.1 RL = 250
0.04 THD + NOISE (%)
0.03
0.02
RL = 2k 0.01
0.01 f = 10kHz RL to VCC / 2 4.0 4.2 4.4 RL = 100k 4.6 4.8 5.0
0 100 10 100 1k FREQUENCY (Hz) 10k 100k TEMPERATURE (C)
0.001
PEAK-TO-PEAK OUTPUT (V)
CHANNEL-TO-CHANNEL ISOLATION vs. FREQUENCY
MAX4165-19a
SMALL-SIGNAL TRANSIENT RESPONSE (NONINVERTING)
MAX4165-20
SMALL-SIGNAL TRANSIENT RESPONSE (INVERTING)
MAX4165-21
130 CHANNEL-TO-CHANNEL ISOLATION (dB) 125 120 115 110 105 100 95 90 85 80 1k 10k 100k FREQUENCY (Hz) 1M
AVCL = +1V/V IN (50mV/div)
AVCL = -1V/V
IN (50mV/div)
OUT (50mV/div)
OUT (50mV/div)
10M
TIME (500ns/div)
TIME (500ns/div)
LARGE-SIGNAL TRANSIENT RESPONSE (NONINVERTING)
MAX4165-22
LARGE-SIGNAL TRANSIENT RESPONSE (INVERTING)
MAX4165-23
AVCL = +1V/V IN (2V/div) IN (2V/div) OUT (2V/div)
AVCL = -1V/V
OUT (2V/div)
TIME (5s/div)
TIME (5s/div)
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7
High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown MAX4165-MAX4169
Pin Description
PIN MAX4165 1 -- -- MAX4166 6 1, 5 -- MAX4167 -- -- 1, 7 MAX4168 DIP/SO -- 5, 7, 8, 10 1, 13 MAX -- -- 1, 9 MAX4169 -- -- 1, 7 NAME OUT N.C. OUT1, OUT2 VEE IN+ IN1-, IN2ININ1+, IN2+ VCC SHDN1, SHDN2 Output No Connection. Not internally connected. Outputs for Amplifiers 1 and 2 Negative Supply. Ground for singlesupply operation. Noninverting Input Inverting Inputs for Amplifiers 1 and 2 Inverting Input Noninverting Inputs for Amplifiers 1 and 2 Positive Supply Active-Low Shutdown Inputs for Amplifiers 1 and 2. Drive low for shutdown mode. Drive high or connect to VCC for normal operation. Active-Low Shutdown Input. Drive low for shutdown mode. Drive high or connect to VCC for normal operation. Outputs for Amplifiers 3 and 4 FUNCTION
2 3 -- 4 -- 5
4 3
4 -- 2, 6
4 -- 2, 12 -- 3, 11 14
4 -- 2, 8 -- 3, 7 10
11 -- 2, 6 -- 3, 5 4
2 -- 7
-- 3, 5 8
--
--
--
6, 9
5, 6
--
--
8
--
--
--
--
SHDN
--
--
--
--
--
8, 14
OUT3, OUT4 IN3-, IN4IN3+, IN4+
--
--
--
--
--
9, 13
Inverting Inputs for Amplifiers 3 and 4
--
--
--
--
--
10, 12
Noninverting Inputs for Amplifiers 3 and 4
8
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High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown
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 current 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: PIC(DISS) VRMS IRMS COS where: VRMS = the RMS voltage from VCC to VOUT when sourcing current = the RMS voltage from V OUT to V EE when sinking current IRMS = the RMS current flowing out of or into the op amp and the load = the phase difference between the voltage and the current. For resistive loads, COS = 1. For example, the circuit in Figure 1 has a package power dissipation of 157mW. V VRMS VCC - VDC - PEAK 2 1.5V = 6.5V - 3.25V - = 2.189VRMS 2 I 3.25V 1.5V / 60 IRMS IDC + PEAK = + 60 2 2
Figure 1. A Circuit Example where the MAX4165/MAX4166 is Being Used in Single-Supply Operation
6.5V R C VIN = 3Vp-p R
MAX4165 MAX4166
MAX4165-MAX4169
6.5V
60
R C VIN = 3Vp-p R
MAX4165 MAX4166
CC
(
)
60 CC = 1 2 RL fL
= 71.84mARMS Therefore, PIC(DISS) = VRMS IRMS COS = 157mW Adding a coupling capacitor improves the package power dissipation because there is no DC current to the load, as shown in Figure 2. VRMS VCC - VDC - = 6.5V - 3.25V -
Figure 2. A Circuit Example where Adding a Coupling Capacitor Greatly Reduces the Power Dissipation of Its Package
(
)
VPEAK 2 1.5V 2 = 2.189VRMS
I 1.5V / 60 IRMS IDC + PEAK = 0A + 2 2 = 17.67mARMS
Therefore, PIC(DISS) = VRMS IRMS COS = 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 +75C (157mW x 4 amplifiers = 628mW + a derating of 8.33mW/C x 5C = 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).
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9
High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown MAX4165-MAX4169
INPUT 0.25Vp-p 0.1F 100k VCC = +3V 4.7k 100k 900k 1F 100k 47 100k 100k VCC = +3V
1/2 MAX4167 1/2 MAX4168
VCC = +3V
1/2 MAX4167 1/2 MAX4168
MAX4165 MAX4166 MAX4167 MAX4168 MAX4169
R3
4.7k
R3 = R1
R2
32 R1 R2
0.1F
Figure 4. Reducing Offset Error Due to Bias Current (Noninverting)
100k
Figure 3. Dual MAX4167/MAX4168 Bridge Amplifier for 200mW at 3V
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 0.1F 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 10F electrolytic capacitor is suitable for most applications. The coupling capacitor C2 sets a low-frequency pole and is fairly large in value. For a 32 load, a 100F coupling capacitor gives a low-frequency pole at 50Hz. The low-frequency pole can be set according to the following equation: = 1 / 2 (RLC2)
R3
MAX4165 MAX4166 MAX4167 MAX4168 MAX4169
R3 = R1
R2
R1
R2
Figure 5. Reducing Offset Error Due to Bias Current (Inverting)
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.
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 900k resistor value. DC voltage at the speaker is limited to 10mV. The 47 and 0.1F capacitors across the speaker maintain a low impedance at the load as frequency increases.
10
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High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown MAX4165-MAX4169
1k
1k
Figure 6. Input Protection Circuit
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 1k series resistors and back-to-back triple diodes across the inputs (Figure 6). For differential voltages less than 1.8V, input resistance is typically 500k. For differential input voltages greater than 1.8V, input resistance is approximately 2k. The input bias current is given by the following equation: IBIAS = (VDIFF - 1.8V) / 2k
VCC = +3.0V RL = 100k IN (1V/div)
OUT (1V/div)
TIME (5s/div)
Figure 7. Rail-to-Rail Input/Output Range
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.
11
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 (25 to ground).
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MAX4165-fig07
High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown MAX4165-MAX4169
1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0 10 VCC = +5.0V RL to VCC / 2
MAX4165-fig08
VCC = +3.0V, CL = 1500pF RL = 100k, RISO = 0
CAPACITIVE LOAD (pF)
UNSTABLE REGION
IN (20mV/div)
STABLE REGION
OUT (20mV/div)
100
1k
10k
100k
TIME (1s/div)
RESISTIVE LOAD (k)
Figure 8. Capacitive Load Stability
Figure 9. Small-Signal Transient Response with Excessive Capacitive Load
VCC = +3.0V, CL = 1500pF RL = 100k, RISO = 39
IN (20mV/div)
MAX4165-fig10
RISO
OUT (20mV/div)
CL
TIME (1s/div)
Figure 10. Small-Signal Transient Response with Excessive Capacitive Load with Isolation Resistor
Figure 11. Capacitive-Load-Driving Circuit
Power-Up and Shutdown Modes
The MAX4166/MAX4168 have a shutdown option. When the shutdown pin (SHDN) is pulled low, supply current drops to 58A 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 5s 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 0.1F ceramic capacitor in parallel with at least 1F. 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.
12
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MAX4165-fig09
High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown MAX4165-MAX4169
MAX4165-fig12 MAX4165-fig13
SHDN (1V/div)
SHDN (1V/div)
OUT (1V/div)
ICC (1mA/div)
TIME (5s/div)
TIME (50s/div)
Figure 12. Shutdown Output Voltage Enable/Disable
Figure 13. Shutdown Enable/Disable Supply Current
MAX4165-fig14
VCC (1V/div)
VCC (1V/div)
OUT (2V/div)
IEE (1mA/div)
TIME (5s/div)
TIME (5s/div)
Figure 14. Power-Up/Down Output Voltage
Figure 15. Power-Up/Down Supply Current
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MAX4165-fig15
13
High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown MAX4165-MAX4169
Pin Configurations (continued)
TOP VIEW
N.C. 1 IN- 2
8 7
SHDN VCC OUT N.C.
OUT1 1 IN1- 2
8 7
VCC OUT2 IN2IN2+
MAX4166
IN+ 3 VEE 4 6 5
MAX4167
IN1+ 3 VEE 4 6 5
DIP/SO/MAX
DIP/SO
OUT1 1 IN1IN1+ VEE SHDN1 2 3 4 5
10 VCC 9 OUT2 IN2IN2+ SHDN2
MAX4168
8 7 6
MAX
OUT1 1 IN1- 2 IN1+ 3 VEE 4 N.C. 5 SHDN1 6 N.C. 7
14 VCC 13 OUT2 12 IN2-
OUT1 1 IN1- 2 IN1+ 3 VCC 4 IN2+ 5 IN2- 6 OUT2 7
14 OUT4 13 IN412 IN4+
MAX4168
11 IN2+ 10 N.C. 9 8 SHDN2 N.C.
MAX4169
11 VEE 10 IN3+ 9 8 IN3OUT3
DIP/SO
DIP/SO
14
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High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown
Typical Operating Circuit
VCC
Ordering Information (continued)
PART MAX4167EPA TEMP. RANGE -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C PINPACKAGE 8 Plastic DIP 8 SO 14 Plastic DIP 14 SO 10 MAX 14 Plastic DIP 14 SO SOT TOP MARK -- -- -- -- -- -- --
MAX4165-MAX4169
R3 C1 VIN R4
MAX4165 MAX4166
C2
MAX4167ESA MAX4168EPD MAX4168ESD MAX4168EUB MAX4169EPD MAX4169ESD
32 R2 R1 C3
___________________Chip Information
MAX4165 TRANSISTOR COUNT: 230 MAX4166 TRANSISTOR COUNT: 230 MAX4167 TRANSISTOR COUNT: 462 MAX4168 TRANSISTOR COUNT: 462 MAX4169 TRANSISTOR COUNT: 924
Package Information
8LUMAXD.EPS
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High-Output-Drive, Precision, Low-Power, SingleSupply, Rail-to-Rail I/O Op Amps with Shutdown MAX4165-MAX4169
Package Information (continued)
SOT5L.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 (c) 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
10LUMAXB.EPS

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