Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Am

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Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Am

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19-2103; 8/01
Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Amps
LMX321/LMX358/LMX324 single/dual/quad, low-cost, low-voltage, pin-to-pin compatible upgrades LMV321/LMV358/LMV324 family general purpose amps. These devices offer Rail-to-Rail® outputs input common-mode range that extends below ground. These amps draw only 105µA quiescent current amplifier, operate from single +2.3V supply, drive resistive loads within 40mV either rail. LMX321/LMX358/LMX324 unity-gain stable with 1.3MHz gain-bandwidth product capable driving capacitive loads 400pF. combination voltage, cost, small package size makes these amplifiers ideal portable/battery-powered equipment. LMX321 single available ultra-small 5pin SC70 space-saving 5-pin SOT23 packages. LMX358 dual available tiny 8-pin SOT23 package. LMX324 quad available 14-pin TSSOP packages.
Features
Upgrade LMV321/LMV358/LMV324 Family Single +2.3V Supply Voltage Range Available Space-Saving Packages 5-Pin SC70 (LMX321) 8-Pin SOT23 (LMX358) 14-Pin TSSOP (LMX324) 1.3MHz Gain-Bandwidth Product 105µA Quiescent Current Amplifier (VCC +2.7V) Phase Reversal Overdriven Inputs Crossover Distortion Rail-to-Rail Output Swing Input Common-Mode Voltage Range: 0.2V 0.8V Drives Resistive Loads
LMX321/LMX358/LMX324
Applications
Cellular Phones Laptops Low-Power, Low-Voltage Applications Portable/Battery-Powered Equipment Cordless Phones Active Filters
PART LMX321AXK-T LMX321AUK-T LMX358AKA-T LMX358ASA LMX358AUA LMX324ASD LMX324AUD
Ordering Information
TEMP. RANGE -40°C +125°C -40°C +125°C -40°C +125°C -40°C +125°C -40°C +125°C -40°C +125°C -40°C +125°C PIN-PACKAGE SC70-5 SOT23-5 SOT23-8 µMAX TSSOP
Selector Guide appears data sheet.
Configurations
VIEW
OUT1 IN1- OUT1 IN1+ IN2+ IN28 OUT2 IN1+ IN2+ IN2- OUT2 OUT4 IN412 IN4+ IN3+ IN38 OUT3
LMX321
IN1-
LMX358
LMX324
SC70-5/SOT23-5 SOT23-8/SO/µMAX
TSSOP/SO
Rail-to-Rail registered trademark Nippon Motorola, Ltd. Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Amps LMX321/LMX358/LMX324
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC VEE) .-0.3V Differential Input Voltage (VIN+ VIN-) .VEE OUT_ .-0.3V (VCC 0.3V) Output Short-Circuit Duration OUT_ Shorted .Continuous Continuous Power Dissipation +70°C) 5-Pin SC70-5 (derate 3.1mW/°C above +70°C).247mW 5-Pin SOT23-5 (derate 7.1mW/°C above +70°C) .571mW 8-Pin SOT23-8 (derate 7.52mW/°C above +70°C) .602mW 8-Pin (derate 5.9mW/°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 (derate 8.3mW/°C above +70°C).667mW Operating Temperature Range .-40°C +125°C Junction Temperature .+150°C Storage Temperature Range .-65°C +150°C Lead Temperature (soldering, 10s) .+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
(VCC +2.7V, VOUT VCC/2, +25°C, unless otherwise noted.)
PARAMETER Characteristics Input Offset Voltage Input Offset Voltage Average Drift Input Bias Current Input Offset Current Common-Mode Rejection Ratio Power-Supply Rejection Ratio Input Common-Mode Voltage Range Large-Signal Voltage Gain TCVOS CMRR PSRR AVOL -0.2V 1.8V 2.3V VOUT CMRR 72dB Limit -0.2 -0.2 1kHz 1kHz 0.13 V/µs degrees nV/Hz pA/Hz µV/oC V/mV SYMBOL CONDITIONS UNITS
VEE, 0.3V VOUT 2.4V 1.35V
Output Voltage Swing
VOUT 1.35V LMX321 (Single)
Supply Current Characteristics Slew Rate Gain-Bandwidth Product Phase Margin Gain Margin Input Noise Voltage Density Input Current Noise Density
LMX358 (Dual) LMX324 (Quad)
step Input 200pF
Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Amps
ELECTRICAL CHARACTERISTICS
(VCC +2.7V, VOUT VCC/2, -40°C +125°C, unless otherwise noted.) (Note
PARAMETER Characteristics Input Offset Voltage Input Bias Current Input Offset Current Common-Mode Rejection Ratio Power-Supply Rejection Ratio Input Common-Mode Voltage Range Large-Signal Voltage Gain CMRR PSRR AVOL -0.1 1.7V 2.3V VOUT CMRR 60dB Limit -0.1 -0.1 V/mV SYMBOL CONDITIONS UNITS
LMX321/LMX358/LMX324
VEE, 0.3V VOUT 2.4V 1.55V
Output Voltage Swing
VOUT 1.35V LMX321 (Single)
Supply Current
LMX358 (Dual) LMX324 (Quad)
ELECTRICAL CHARACTERISTICS
(VCC +5V, VOUT VCC/2, +25°C, unless otherwise noted.)
PARAMETER Characteristics Input Offset Voltage Input Offset Voltage Average Drift Input Bias Current Input Offset Current Common-Mode Rejection Ratio Power-Supply Rejection Ratio Input Common-Mode Voltage Range Large-Signal Voltage Gain TCVOS CMRR PSRR AVOL -0.2 4.1V 2.3V VOUT CMRR 72dB VEE, 0.3V VOUT 4.7V Limit -0.2 -0.2 µV/oC V/mV SYMBOL CONDITIONS UNITS
Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Amps LMX321/LMX358/LMX324
ELECTRICAL CHARACTERISTICS (continued)
(VCC +5V, VOUT VCC/2, +25°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS 2.5V Output Voltage Swing VOUT 2.5V Output Short-Circuit Current Sourcing, VOUT Sinking, VOUT LMX321 (Single) Supply Current Characteristics Slew Rate Gain-Bandwidth Product Phase Margin Gain Margin Input Noise Voltage Density Input Noise Current Density 1kHz 1kHz step input 200pF 0.13 V/µs degrees nV/Hz pA/Hz LMX358 (Dual) LMX324 (Quad) UNITS
ELECTRICAL CHARACTERISTICS
(VCC +5V, VOUT VCC/2, -40°C +125°C, unless otherwise noted.) (Note
PARAMETER Characteristics Input Offset Voltage Input Bias Current Input Offset Current Common-Mode Rejection Ratio Power-Supply Rejection Ratio Input Common-Mode Voltage Range Large-Signal Voltage Gain CMRR PSRR AVOL -0.1 4.0V 2.3V VOUT CMRR 63dB Limit -0.1 -0.1 V/mV SYMBOL CONDITIONS UNITS
VEE, 0.3V VOUT 4.7V 2.5V
Output Voltage Swing
VOUT 2.5V LMX321 (Single)
Supply Current
LMX358 (Dual) LMX324 (Quad)
Note Specifications 100% tested +25°C (exceptions noted). temperature limits guaranteed design.
Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Amps
Typical Operating Characteristics
+25°C, unless otherwise noted.)
LMX321/LMX358/LMX324
SUPPLY CURRENT AMPLIFIER SUPPLY VOLTAGE
LMX321 toc01
INPUT BIAS CURRENT TEMPERATURE
LMX321 toc02
SOURCE CURRENT OUTPUT VOLTAGE
2.7V
LMX321 toc03
SUPPLY CURRENT AMPLIFIER (µA) +25°C -40°C +85°C +125°C
INPUT BIAS CURRENT (nA) +5V, VCC/2
SOURCE CURRENT (mA)
0.01 TEMPERATURE (°C) 0.01 OUTPUT VOLTAGE REFERENCED
SUPPLY VOLTAGE
SOURCE CURRENT OUTPUT VOLTAGE
LMX321 toc04
SINK CURRENT OUTPUT VOLTAGE
LMX321 toc05
SINK CURRENT OUTPUT VOLTAGE
LMX321 toc06
2.7V
SOURCE CURRENT (mA)
SINK CURRENT (mA)
SINK CURRENT (mA) 0.01
0.01 0.01 OUTPUT VOLTAGE REFERENCED
0.01 0.001
0.01 0.001
0.01
OUTPUT VOLTAGE REFERENCED
OUTPUT VOLTAGE REFERENCED
OUTPUT VOLTAGE SWING SUPPLY VOLTAGE
LMX321 toc07
OUTPUT VOLTAGE SWING SUPPLY VOLTAGE
LMX321 toc08
INPUT VOLTAGE NOISE FREQUENCY
2.7V VCC/2
LMX321 toc09
OUTPUT VOLTAGE SWING (mV) SUPPLY VOLTAGE NEGATIVE SWING (VOL) POSITIVE SWING (VCC VOH)
OUTPUT VOLTAGE SWING (mV) NEGATIVE SWING (VOL) SUPPLY VOLTAGE POSITIVE SWING (VCC VOH)
INPUT VOLTAGE NOISE (nV/Hz)
100k
FREQUENCY (Hz)
Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Amps LMX321/LMX358/LMX324
Typical Operating Characteristics (continued)
+25°C, unless otherwise noted.)
INPUT CURRENT NOISE FREQUENCY
LMX321 toc10
CROSSTALK REJECTION FREQUENCY
LMX321 toc11
POWER-SUPPLY REJECTION RATIO FREQUENCY
2.7V PSRRLMX321 toc12
INPUT CURRENT NOISE (pA/Hz)
2.7V VCC/2
CROSSTALK REJECTION (dB) -110 -130 -150
PSRR (dB)
-100 -120
PSRR+
100k
100k
100M
FREQUENCY (Hz)
100k
FREQUENCY (Hz)
FREQUENCY (Hz)
INPUT OFFSET VOLTAGE COMMON-MODE VOLTAGE
LMX321 toc13
INPUT OFFSET VOLTAGE COMMON-MODE VOLTAGE
LMX321 toc14
INPUT OFFSET VOLTAGE OUTPUT VOLTAGE
2.5V, -2.5V INPUT OFFSET VOLTAGE (µV) -100
LMX321 toc15
0.10 1.35V, -1.35V 0.05 (mV) -0.05 -0.10 -0.15 -0.20 -1.7 -1.2 -0.7 -0.2
0.15 0.10 0.05 (mV) -0.05 -0.10 -0.15 -0.20
2.5V, -2.5V
-2.8 -2.3 -1.8 -1.3 -0.8 -0.3 COMMON-MODE VOLTAGE
COMMON-MODE VOLTAGE
OUTPUT VOLTAGE
INPUT OFFSET VOLTAGE OUTPUT VOLTAGE
1.35V, -1.35V
LMX321 toc16
GAIN PHASE FREQUENCY RESISTIVE LOAD
GAIN (dB)
LMX321 toc17
GAIN PHASE FREQUENCY RESISTIVE LOAD
PHASE MARGIN (degrees) GAIN (dB) 1.35V, -1.35V AVCL 60dB, VOUT 100k 100k 100k
LMX321 toc18
INPUT OFFSET VOLTAGE (mV) -1.5 -1.0 -0.5
100k
600k
2.5V, -2.5V AVCL 60dB, VOUT 100k 100k FREQUENCY (Hz)
OUTPUT VOLTAGE
FREQUENCY (Hz)
PHASE (degrees)
Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Amps LMX321/LMX358/LMX324
Typical Operating Characteristics (continued)
+25°C, unless otherwise noted.)
GAIN PHASE FREQUENCY CAPACTIVE LOAD
GAIN (dB) 100k FREQUENCY (Hz) 2.5V, -2.5V AVCL 60dB, VOUT 500pF
LMX321 toc19
GAIN PHASE FREQUENCY CAPACITIVE LOAD
PHASE (degrees) GAIN (dB) 500pF 100pF 2.5V, -2.5V 100k AVCL 60dB, VOUT 100k
LMX321 toc20
100pF 500pF
FREQUENCY (Hz)
GAIN PHASE FREQUENCY TEMPERATURE
-40°C GAIN (dB) 2.5V, -2.5V AVCL 60dB, VOUT 100k FREQUENCY (Hz) PHASE (degrees) +25°C +85°C +125°C +85°C -25°C
LMX321 toc21
CAPACITIVE-LOAD STABILITY
LMX321 toc22
SLEW RATE SUPPLY VOLTAGE
STEP, AVCL +1V/V
LMX321 toc23
LOAD CAPACITANCE (pF)
-40°C +25°C
4000 3500 UNSTABLE 3000
1.10 1.08 SLEW RATE (V/µS) 1.06 RISING EDGE 1.04 1.02 1.00
2500 2000 1500 1000 STABLE 100k LOAD RESISTANCE
FALLING EDGE
0.98 0.96 SUPPLY VOLTAGE
NONINVERTING LARGE-SIGNAL RESPONSE
LMX321 toc24
NONINVERTING SMALL-SIGNAL RESPONSE
LMX321 toc25
TOTAL HARMONIC DISTORTION PLUS NOISE FREQUENCY
LMX321 toc26
1V/div 100mV/div
NOISE
2.7V, +10, VOUT 1Vp-p +10, VOUT 2.5Vp-p
VOUT 1V/div
VOUT 100mV/div
0.01
2.7V, VOUT 1Vp-p VOUT 2.5Vp-p
1µs/div
1µs/div
0.001 FREQUENCY (Hz) 100k
PHASE (degrees)
Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Amps LMX321/LMX358/LMX324
Typical Operating Characteristics (continued)
+25°C, unless otherwise noted.)
SHORT-CIRCUIT CURRENT TEMPERATURE (SINKING)
LMX321 toc27
SHORT-CIRCUIT CURRENT TEMPERATURE (SOURCING)
LMX321 toc28
OUTPUT IMPEDANCE FREQUENCY
2.7V AVCL +1V/V
LMX321 toc29
SHORT-CIRCUIT CURRENT (mA)
SHORT-CIRCUIT CURRENT (mA) 2.7V
1000
OUTPUT IMPEDANCE
2.7V
0.01
0.001 TEMPERATURE (°C) 100k 100M FREQUENCY (Hz)
TEMPERATURE (°C)
Description
NAME LMX321 LMX358 LMX324 INOUT OUT1 IN1IN1+ OUT2 IN2IN2+ OUT3 IN3IN3+ OUT4 IN4IN4+ Noninverting Amplifier Input Negative Supply. Connect ground single-supply operation. Inverting Amplifier Input Output Positive Supply Output Amplifier Inverting Input Amplifier Noninverting Input Amplifier Output Amplifier Inverting Input Amplifier Noninverting Input Amplifier Output Amplifier Inverting Input Amplifier Noninverting Input Amplifier Output Amplifier Inverting Input Amplifier Noninverting Input Amplifier FUNCTION
Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Amps LMX321/LMX358/LMX324
3.5k
3.5k
LMX321 LMX358 LMX324
Figure Input Protection Circuit
2V/div 2.5V
Figure Capacitive-Load-Driving Circuit
2.2nF 100mV/div
2.6V
2.4V
VOUT 1V/div
VOUT 100mV/div
2.6V
2.4V
-2.5V 200µs/div 2.5V, -2.5V, AVCL 2V/V
4µs/div
Figure Rail-to-Rail Output Swing
Figure Output With Excessive Capacitive Load
Detailed Description
Input Protection Circuit
LMX321/LMX358/LMX324's inputs protected from large differential input voltages internal 3.5k series resistors back-to-back triple diode stacks across inputs (Figure differential input voltages (much less than 1.8V), input resistance typically differential input voltages greater than 1.8V, input resistance around input bias current approximated following equation: IBIAS (VDIFF 1.8V) region where differential input voltage approaches 1.8V, input resistance decreases exponentially from diode block begins conducting. Inversely, bias current increases with same curve.
shows output voltage swing LMX321 configured with AVCL +2V/V.
Driving Capacitive Loads
Driving capacitive load cause instability many amps, especially those with quiescent current. LMX321/LMX358/LMX324 unity-gain stable range capacitive loads above 400pF. Figure shows response LMX321 with excessive capacitive load. Adding series resistor between output load capacitor (Figure improves circuit's response isolating load capacitance from amp's output.
Applications Information
Power-Up
LMX321/LMX358/LMX324 outputs typically settle within 10µs after power-up. Figure shows output voltage power-up power-down.
Rail-to-Rail Output Stage
LMX321/LMX358/LMX324 drive loads still typically swing within 40mV supply rails. Figure
Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Amps LMX321/LMX358/LMX324
Power Supplies Layout
LMX321/LMX358/LMX324 operate from single +2.3V power supply. Bypass power supply with 0.1µF capacitor ground close possible. Good layout techniques optimize performance minimizing amount stray capacitance amp's inputs outputs. Place external components close minimize trace lengths stray capacitance.
RISO LMX321 LMX358 LMX324
Chip Information
LMX321 TRANSISTOR COUNT: LMX358 TRANSISTOR COUNT: LMX324 TRANSISTOR COUNT: PROCESS: Bipolar
Figure Capacitive-Load-Driving Circuit With Isolation Resistor
2V/div
VOUT 1V/div
4µs/div
Figure Power-Up/Power-Down Waveform
Selector Guide
PART LMX321AXK-T LMX321AUK-T LMX358AKA-T LMX358ASA LMX358AUA LMX324ASD LMX324AUD AMPLIFIERS PACKAGE MARK ADSQ AAIR
Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Amps
Package Information
SC70, 5L.EPS
LMX321/LMX358/LMX324
SOT5L.EPS
Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Amps LMX321/LMX358/LMX324
Package Information (continued)
SOT23, 8L.EPS
8LUMAXD.EPS
Single/Dual/Quad, General Purpose, Low-Voltage, Rail-to-Rail Output Amps
Package Information (continued)
TSSOP,NO PADS.EPS
LMX321/LMX358/LMX324
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 2001 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Am

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