Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail Amps f
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19-1380; 12/99
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail Amps
family operational amplifiers combines wide bandwidth excellent accuracy with Rail-to-Rail® operation inputs outputs. These devices require only 650µA amplifier operate from either single supply (+2.4V +6.5V) dual supplies (±1.2V ±3.25V). These unity-gain-stable amplifiers capable driving loads have 5MHz gain-bandwidth product. MAX4323 MAX4327 feature low-power shutdown mode that reduces supply current 25µA places outputs high-impedance state. With their rail-to-rail input common-mode range output swing, these amplifiers ideal low-voltage, single-supply operation. addition, offset voltage high speed make them ideal signal-conditioning stages precision, low-voltage data-acquisition systems. MAX4322/MAX4323 available space-saving SOT23 packages.
_Features
SOT23 Packages (MAX4322/MAX4323) +2.4V +6.5V Single-Supply Operation Rail-to-Rail Input Common-Mode Voltage Range Rail-to-Rail Output Voltage Swing 5MHz Gain-Bandwidth Product 650µA Quiescent Current Amplifier 700µV Offset Voltage Phase Reversal Overdriven Inputs Drive Loads 25µA Shutdown Mode (MAX4323/MAX4327) Unity-Gain Stable Capacitive Loads 500pF
Ordering Information
PART TEMP. RANGE PINPACKAGE SOT23-5 µMAX µMAX SOT23-6 µMAX µMAX MARK ACGE AAEC
Selector Guide
PART (MHz) AMPS PINPACKAGE SOT23-5, µMAX/SO µMAX/SO/ SOT23-6 µMAX/SO µMAX, SHUTDOWN
MAX4322 MAX4323 MAX4326 MAX4327 MAX4329
MAX4322EUK-T -40°C +85°C MAX4322ESA -40°C +85°C MAX4322EUA -40°C +85°C MAX4323ESA -40°C +85°C MAX4323EUA -40°C +85°C MAX4323EUT -40°C +85°C MAX4326EUA -40°C +85°C MAX4326ESA -40°C +85°C MAX4327EUB -40°C +85°C MAX4327ESD -40°C +85°C MAX4329ESD -40°C +85°C
_Applications
Battery-Powered Instruments Portable Equipment Data-Acquisition Systems Signal Conditioning Low-Power, Low-Voltage Applications
Typical Operating Circuit
MAX187 SHDN DOUT SCLK VREF MAX4322
Configurations appear data sheet.
SERIAL INTERFACE
Rail-to-Rail registered trademark Nippon Motorola, Ltd. Maxim Integrated Products
free samples latest literature, visit www.maxim-ic.com phone 1-800-998-8800. small orders, phone 1-800-835-8769.
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail Amps
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC-VEE) .+7.5V Other Pins .(VCC 0.3V) (VEE 0.3V) Output Short-Circuit Duration.Continuous (short either supply) Continuous Power Dissipation +70°C) 5-pin SOT23-5 (derate 7.1mW/°C above +70°C) .571mW 6-pin SOT23 (derate 7.1mW/°C Above 70°C) .571mW 8-pin (derate 5.88mW/°C above +70°C).471mW 8-pin µMAX (derate 4.10mW/°C above +70°C) .330mW 10-pin µMAX (derate 5.6mW/°C above +70°C) .444mW 14-pin (derate 8.00mW/°C above +70°C).640mW Operating Temperature Range MAX432_E_ .-40°C +85°C Maximum Junction Temperature .+150°C Storage Temperature Range .-65°C +160°C Lead Temperature (soldering, 10sec) .+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated operational sections specifications implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
ELECTRICAL CHARACTERISTICS-TA +25°C
(VCC +5.0V, VOUT SHDN VCC, tied unless otherwise noted.) PARAMETER Input Offset Voltage Input Bias Current Input Offset Current Differential Input Resistance Common-Mode Input Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio Output Resistance Large-Signal Voltage Gain CONDITIONS MAX432_ESA/MAX4327ESD VEE, other packages VEE, VEE, -1.5V VDIFF 1.5V Inferred from CMRR test MAX432_ESA/MAX4327ESD other packages ±0.7 ±1.2 ±2.0 ±2.50 ±150 UNITS
2.4V 6.5V +1V/V VOUT 0.25V 4.75V, 100k VOUT 0.4V 4.6V,
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail Amps
ELECTRICAL CHARACTERISTICS-TA +25°C (continued)
(VCC +5V, VOUT SHDN VCC, tied unless otherwise noted.) PARAMETER MAX4322/ MAX4323 Output Voltage Swing MAX4326/ MAX4327/ MAX4329 Output Short-Circuit Current SHDN Logic Threshold SHDN Input Current Operating Supply-Voltage Range Supply Current Amplifier Shutdown Supply Current Amplifier MAX4323/MAX4327 MAX4323/MAX4327 Inferred from PSRR test VOUT SHDN 0.8V, MAX4323/MAX4327 2.4V 2.4V 1100 High 100k CONDITIONS 100k UNITS
ELECTRICAL CHARACTERISTICS-TA -40°C +85°C
(VCC +5V, VOUT SHDN VCC, tied unless otherwise noted.) (Note PARAMETER Input Offset Voltage Input Offset Voltage Tempco Input Bias Current Input Offset Current Common-Mode Input Voltage Range Common-Mode Rejection Ratio VEE, VEE, Inferred from CMRR test MAX432_ESA/MAX4327ESD other packages CONDITIONS MAX432_ESA/MAX4327ESD VEE, other packages ±180 ±3.0 ±6.0 UNITS µV/°C
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail Amps
ELECTRICAL CHARACTERISTICS -40°C +85°C (continued)
(VCC +5V, VOUT SHDN VCC, tied unless otherwise noted.) (Note PARAMETER Power-Supply Rejection Ratio Large-Signal Voltage Gain 2.4V 6.5V VOUT 0.4V 4.6V, MAX4322/ MAX4323 Output Voltage Swing MAX4326/ MAX4327/ MAX4329 High SHDN 0.8V, MAX4323/MAX4327 CONDITIONS UNITS
SHDN Logic Threshold SHDN Input Current Operating Supply-Voltage Range Supply Current Amplifier Shutdown Supply Current Amplifier
MAX4323/MAX4327 MAX4323/MAX4327
ELECTRICAL CHARACTERISTICS
(VCC +5V, VOUT SHDN VCC, +25°C unless otherwise noted.) PARAMETER Gain-Bandwidth Product Phase Margin Gain Margin Total Harmonic Distortion Slew Rate Settling Time 0.01% Turn-On Time SHDN Delay Input Capacitance Input Noise Voltage Density Input Noise Current Density Amp-Amp Isolation Capacitive Load Stability +1V/V 1kHz 1kHz +1V/V, VOUT step step MAX4323/MAX4327 Enable Disable 10kHz, VOUT 2Vp-p, +1V/V CONDITIONS 0.003 UNITS degrees V/µs nV/Hz
Note devices 100% tested +25°C. temperature limits guaranteed design.
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail Amps
_Typical Operating Characteristics
(VCC +5V, SHDN VCC, +25°C, unless otherwise noted.)
GAIN PHASE FREQUENCY (WITH CLOAD)
GAIN GAIN (dB) PHASE (DEGREES) PHASE +1000 LOAD 100k -108 -144 -180 100M +1000 500pF 100k GAIN
MAX4322/26/29-02
GAIN PHASE FREQUENCY
MAX4322/26/29-01
POWER-SUPPLY REJECTION FREQUENCY
PHASE (DEGREES) (dB) -100 100k 100M
MAX4322/26/29-03
GAIN (dB)
PHASE
-108 -144 -180 100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
MAX4326/MAX4327/MAX4329 CHANNEL SEPARATION FREQUENCY
MAX4322/26/29-04
OUTPUT IMPEDANCE FREQUENCY
MAX4322/26/29-05
MAX4323/MAX4327 SHUTDOWN SUPPLY CURRENT TEMPERATURE
SHUTDOWN SUPPLY CURRENT (mA)
MAX4323-11
CHANNEL SEPARATION (dB) 100k FREQUENCY (Hz)
OUTPUT IMPEDANCE
SHDN 2.7V 6.5V
0.01 100k 100M FREQUENCY (Hz)
TEMPERATURE (°C)
SUPPLY CURRENT AMPLIFIER TEMPERATURE
MAX4322/26/29-6
INPUT OFFSET VOLTAGE TEMPERATURE
MAX4322/26/29-7
INPUT BIAS CURRENT COMMON-MODE VOLTAGE
INPUT BIAS CURRENT (nA) 2.7V 6.5V
MAX4322/26/29-8
SUPPLY CURRENT (µA) 2.7V 6.5V
3.00 2.25 1.50 VOLTAGE (mV) 0.75 -0.75 -1.50 -2.25 -3.00 PACKAGE SOT23-5/6 PACKAGE
TEMPERATURE (°C)
TEMPERATURE (°C)
COMMON-MODE VOLTAGE
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail Amps
_Typical Operating Characteristics (continued)
(VCC +5V, SHDN VCC, +25°C, unless otherwise noted.)
INPUT BIAS CURRENT TEMPERATURE
MAX4322/26/29-9
COMMON-MODE REJECTION TEMPERATURE
MAX4322/26/29-10
MINIMUM OUTPUT VOLTAGE TEMPERATURE
VOUT (mV) 6.5V,
MAX4322/26/29-11
INPUT BIAS CURRENT (nA) TEMPERATURE (°C) 6.5V, 2.7V, 6.5V, 2.7V,
COMMON-MODE REJECTION (dB) -0.2V 5.2V 5.0V
2.7V,
6.5V, 100k 2.7V, 100k TEMPERATURE (°C)
TEMPERATURE (°C)
MAXIMUM OUTPUT VOLTAGE TEMPERATURE
MAX4322/26/29-12
LARGE-SIGNAL GAIN OUTPUT VOLTAGE
MAX4322/26/29-13
LARGE-SIGNAL GAIN OUTPUT VOLTAGE
6.5V 100k
MAX4322/26/29-14
VOUT (mV) 6.5V,
GAIN (dB)
2.7V
GAIN (dB)
100k
2.7V,
6.5V, 100k (TOP) 2.7V, 100k (BOTTOM)
OUTPUT VOLTAGE: FROM (mV) OUTPUT VOLTAGE: FROM (mV)
TEMPERATURE (°C)
LARGE-SIGNAL GAIN TEMPERATURE
MAX4322/26/29-15
LARGE-SIGNAL GAIN OUTPUT VOLTAGE
MAX4322/26/29-16
LARGE-SIGNAL GAIN OUTPUT VOLTAGE
6.5V 100k
MAX4322/26/29-17
GAIN (dB)
VOUT(p-p)
GAIN (dB) 2.7V 100k
GAIN (dB)
6.5V, 2.7V,
6.5V,
2.7V, TEMPERATURE (°C) OUTPUT VOLTAGE: FROM (mV)
OUTPUT VOLTAGE: FROM (mV)
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail Amps
_Typical Operating Characteristics (continued)
(VCC +5V, SHDN VCC, +25°C, unless otherwise noted.)
LARGE-SIGNAL GAIN TEMPERATURE
MAX4322/26/29-18
MINIMUM OPERATING VOLTAGE TEMPERATURE
MAX4322/26/29-19
TOTAL HARMONIC DISTORTION NOISE FREQUENCY
0.035 0.030 NOISE 0.025 0.020 0.015 0.010 0.005 2Vp-p SIGNAL 500kHz LOWPASS FILTER
MAX4322/26/29-20
GAIN (dB)
6.5V, 6.5V,
MINIMUM OPERATING VOLTAGE
0.040
2.7V, 2.7V,
VOUT(p-p) 600mV 100k
TEMPERATURE (°C)
TEMPERATURE (°C)
FREQUENCY (Hz)
100k
TOTAL HARMONIC DISTORTION NOISE PEAK-TO-PEAK SIGNAL AMPLITUDE
MAX4322/26/29-21
SMALL-SIGNAL TRANSIENT RESPONSE (NONINVERTING)
MAX4322/26/29-22
10kHz SINE WAVE 500kHz LOWPASS FILTER
VOLTAGE (50mV/div)
0.01
0.001
100k
VOLTAGE (50mV/div)
NOISE
TIME (200ns/div)
TIME (200ns/div)
PEAK-TO-PEAK SIGNAL AMPLITUDE
LARGE-SIGNAL TRANSIENT RESPONSE (NONINVERTING)
MAX4322/26/29-24
LARGE-SIGNAL TRANSIENT RESPONSE (INVERTING)
MAX4322/26/29-26
VOLTAGE (2V/div) VOLTAGE (2V/div)
TIME (2µs/div)
TIME (2µs/div)
MAX4322/26/29-23
SMALL-SIGNAL TRANSIENT RESPONSE (INVERTING)
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail Amps
Description
MAX4322 MAX4323 SOT23-5 SO/µMAX SOT23-6 SO/µMAX MAX4326 MAX4327 µMAX NAME MAX4329 INVCC N.C. Output Negative Supply. Ground single-supply operation. Noninverting Input Inverting Input Positive Supply Connection Shutdown Control. high leave floating enable amplifier. Outputs amps Inverting Inputs amps Noninverting Inputs amps Shutdown Control amps high leave floating enable amplifier. Outputs amps Inverting Inputs amps Noninverting Inputs amps FUNCTION
SHDN OUT1, OUT2 IN1-, IN2IN1+, IN2+ SHDN1, SHDN2 OUT3, OUT4 IN3-, IN4IN3+, IN4+
Applications Information
Rail-to-Rail Input Stage
Devices MAX4329 family high-speed amplifiers have rail-torail input output stages designed low-voltage, single-supply operation. input stage consists separate differential stages, which combine provide input common-mode range extending supply rails. stage active input voltages close negative rail, stage active input voltages near positive rail. input offset voltage typically below 250µV.
switchover transition region, which occurs near been extended minimize slight degradation CMRR caused mismatch input pairs. Their offset voltage, high bandwidth, rail-to-rail common-mode range make these amps excellent choices precision, low-voltage, data-acquisition systems. Since input stage switches between pairs, input bias current changes polarity input voltage passes through transition region. reduce offset error caused input bias currents flowing through external source impedances, match effective impedance seen each input (Figures 1b). High source impedances, together
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail Amps
with input capacitance, create parasitic pole that produces underdamped signal response. Reducing input impedance placing small (2pF 10pF) capacitor across feedback resistor improves response. inputs protected from large differential input voltages series resistors back-to-back triple diodes across inputs (Figure differential input voltages less than 1.8V input resistance typically 500k. differential input voltages greater than 1.8V input resistance approximately input bias current determined following equation: VDIFF 1.8V
Rail-to-Rail Output Stage
minimum output voltage will within millivolts ground single-supply operation where load referenced ground (VEE). Figure shows input voltage range output voltage swing MAX4322 connected voltage follower. With supply load tied ground, output swings from 0.00V 2.90V. maximum output voltage swing depends load, will within 350mV supply, even with maximum load (500 ground). Driving capacitive load cause instability most high-speed amps, especially those with quiescent current. MAX4322/MAX4323/MAX4326/ MAX4327/MAX4329 have high tolerance capacitive loads. They stable with capacitive loads 500pF. Figure gives stable operating region capacitive loads. Figures show response with capacitive loads results adding isolation resistor series with output (Figure resistor improves circuit's phase margin isolating load capacitor from amp's output.
IBIAS
MAX4322/MAX4323 MAX4326/MAX4327 MAX4329
MAX4322/MAX4323 MAX4326/MAX4327 MAX4329
Figure Reducing Offset Error Bias Current (Noninverting)
Figure Reducing Offset Error Bias Current (Inverting)
Figure Input Protection Circuit
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail Amps
Power-Up Shutdown Mode
amplifiers typically settle within after power-up. Using test circuit Figure Figures show output voltage supply current power-up. MAX4323 MAX4327 have shutdown option. When shutdown (SHDN) pulled low, supply current drops below 25µA amplifier amplifiers disabled with outputs highimpedance state. Pulling SHDN high leaving floating enables amplifier. dual-amplifier MAX4327, shutdown functions operate independently. Figures show output voltage supply current responses MAX4323 shutdown pulse.
Power Supplies Layout
operate from single +2.4V +6.5V power supply, from dual supplies ±1.2V ±3.25V. single-supply operation, bypass power supply with 0.1µF ceramic capacitor parallel with least 1µF. dual supplies, bypass each supply ground. Good layout improves performance decreasing amount stray capacitance amp's inputs outputs. decrease stray capacitance, minimize trace lengths resistor leads placing external components close amp's pins.
10,000
CAPACITIVE LOAD (pF)
VOLTAGE (1V/div)
UNSTABLE REGION
1000
VOUT VCC/2 TIME (2µs/div) 100k RESISTIVE LOAD
Figure Rail-to-Rail Input /Output Voltage Range
Figure Capacitive-Load Stability
500pF VOLTAGE (50mV/div) VOLTAGE (50mV/div)
1000pF
TIME (400ns/div)
TIME (400ns/div)
Figure Small-Signal Transient Response with Capacitive Load
Figure Transient Response Capacitive Load with Isolation Resistor
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail Amps
2.7V STEP POWER-UP TEST
MAX4322/MAX4323 MAX4326/MAX4327 MAX4329
VOUT
MAX4322/MAX4323 MAX4326/MAX4327 MAX4329
SUPPLY-CURRENT MONITORING POINT
Figure Capacitive-Load-Driving Circuit
Figure Power-Up Test Circuit
VOLTAGE (1V/div)
(1V/div)
(500µA/div)
TIME (5µs/div)
TIME (5µs/div)
Figure Power-Up Output Voltage
Figure Power-Up Supply Current
2.7V SHDN (1V/div) SHDN (1V/div)
2.7V
(0.5V/div)
(500µA/div)
TIME (2µs/div)
TIME (2µs/div)
Figure Shutdown Output Voltage
Figure Shutdown Enable/Disable Supply Current
Single/Dual/Quad, Low-Cost, SOT23, Low-Power, Rail-to-Rail Amps
_Pin Configurations
VIEW
N.C. IN1-
N.C. N.C.
N.C. IN1- IN1+
SHDN N.C.
MAX4322
MAX4323
SHDN IN1+
MAX4322
MAX4323
SOT23-5
SOT23-6
SO/µMAX
OUT1 IN1- IN1+
OUT2 IN2IN2+
OUT1 IN1- IN1+
OUT2 IN2-
OUT1 IN1IN1+ SHDN1
OUT2 IN2IN2+ SHDN2
OUT1 IN1- IN1+ IN2+ IN2- OUT2
OUT4 IN412 IN4+
MAX4326
MAX4327
N.C. SHDN1
MAX4327
IN2+ N.C. SHDN2 N.C.
MAX4329
IN3+ IN3OUT3
SO/µMAX
N.C.
µMAX
Chip Information
MAX4322 TRANSISTOR COUNT: MAX4323 TRANSISTOR COUNT: MAX4326 TRANSISTOR COUNT: MAX4327 TRANSISTOR COUNT: MAX4329 TRANSISTOR COUNT: SUBSTRATE CONNECTED
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
_Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 1999 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.
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