SOT23, Very High Precision, 3V/5V Rail-to-Rail Amps MAX4236/MAX42
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19-2110; 8/01
SOT23, Very High Precision, 3V/5V Rail-to-Rail Amps
MAX4236/MAX4237 high-precision amps that feature exceptionally offset voltage offset voltage temperature coefficient without using chopper techniques. MAX4236 MAX4237 have typical large-signal, open-loop voltage gain 120dB. These devices have ultra-low input-bias current 1pA. MAX4236 unity-gain stable with gainbandwidth product 1.7MHz, while MAX4237 stable closed-loop gains greater than 5V/V with gain-bandwidth product 7.5MHz. Both devices have shutdown function which quiescent current reduced less than 0.1µA, amplifier output forced into high-impedance state. input common-mode range MAX4236/ MAX4237 extends below negative supply range, output swings Rail-to-Rail®. These features make amplifiers ideal applications with single power supplies. MAX4236/MAX4237 specified extended temperature range (-40°C +85°C) available tiny SOT23, µMAX, packages. greater accuracy, grade µMAX packages tested guarantee 20µV (max) offset voltage +25°C less then 2µV/°C drift.
Features
Ultra-Low Offset Voltage 20µV (max) +25°C (Grade 50µV (max) +25°C (Grade 6-Pin SOT23) Ultra-Low Offset Voltage Drift 2µV/°C (max) (Grade 4.5µV/°C (max) (Grade 6-Pin SOT23) 5.5µV/°C (max) (6-Pin SOT23) Ultra-Low Input Bias Current High Open-Loop Voltage Gain: 110dB (min) 100k) Compatible with Single-Supply Power Systems Ground Sensing: Input Common-Mode Range Includes Negative Rail Rail-to-Rail Output Swing into Load 350µA Quiescent Current Gain-Bandwidth Product 1.7MHz (MAX4236, 1V/V) 7.5MHz (MAX4237, 5V/V) 200pF Capacitive Load Handling Capability Shutdown Mode: 0.1µA Quiescent Current, Places Output High-Impedance State Available Space-Saving SOT23 µMAX Packages
MAX4236/MAX4237
Applications
Strain Gauges Piezoelectric Sensors Thermocouple Amplifiers Electrochemical Sensors Battery-Powered Instrumentation Instrumentation Amplifiers
Rail-to-Rail registered trademark Nippon Motorola, Inc.
Ordering Information
PART MAX4236EUT-T MAX4236AEUA MAX4236BEUA TEMP. RANGE -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C PIN-PACKAGE SOT23-6 µMAX µMAX SOT23-6 µMAX µMAX
Configurations
VIEW
N.C. ININ+ SHDN N.C.
MAX4236AESA MAX4236BESA MAX4237EUT-T MAX4237AEUA MAX4237BEUA MAX4237AESA MAX4237BESA
MAX4236 MAX4237
SHDN
MAX4236A/B MAX4237A/B SO-8/µMAX
SOT23-6
Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
SOT23, Very High Precision, 3V/5V Rail-To-Rail Amps MAX4236/MAX4237
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC VEE) .-0.3V Analog Input Voltage (IN+ IN-) .(VEE 0.3V) (VCC 0.3V) Logic Input Voltage (SHDN) .(VEE 0.3V) (VCC 0.3V) Current into .20mA Output Short-Circuit Duration.Continuous Either Continuous Power Dissipation +70°C) 6-Pin SOT23-6 (derate 8.7mW/°C above +70°C) .696mW 8-Pin µMAX (derate 4.5mW/°C above +70°C) .362mW 8-Pin (derate 5.9mW/°C above +70°C).471mW Operating Temperature Range .-40°C +85°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 (SO-8 µMAX-8)
(VCC +2.4V +5.5V, VOUT VCC/2, 100k VCC/2, TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER Supply Voltage Range SYMBOL CONDITIONS Guaranteed PSRR test Quiescent Supply Current +5V, Grade Input Offset Voltage +5V, Grade (Note (Note (Note Differential common mode Guaranteed CMRR test +5V; -0.15V (VCC 1.2V) +3.0V; -0.15V (VCC 1.2V) Power-Supply Rejection Ratio PSRR +2.4V +5.5V +25oC TMIN TMAX +25oC TMIN TMAX TMIN TMAX
±0.6 ±0.6 1000
±150 ±340 ±4.5 ±500
UNITS
normal mode shutdown mode normal mode shutdown mode +25oC TMIN TMAX TMIN TMAX Grade Grade
Input Offset Voltage Temperature Coefficient Input Bias Current Input Offset Current Input Resistance Input Common-Mode Voltage
TCVOS
µV/°C
-0.15
Common-Mode Rejection Ratio
CMRR
SOT23, Very High Precision, 3V/5V Rail-To-Rail Amps
ELECTRICAL CHARACTERISTICS (SO-8 µMAX-8) (continued)
(VCC +2.4V +5.5V, VOUT VCC/2, 100k VCC/2, TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER SYMBOL +5V, connected VCC/2, +25oC +5V, connected VCC/2, TMIN TMAX Large-Signal Voltage Gain AVOL +3V, connected VCC/2, +25oC +3V, connected VCC/2, TMIN TMAX CONDITIONS 100k, VOUT 15mV (VCC 50mV) VOUT 0.15V (VCC 0.3V) 100k, VOUT 15mV (VCC 50mV) VOUT 0.15V (VCC 0.3V) 100k, VOUT 15mV (VCC 50mV) VOUT 0.15V (VCC 0.3V) 100k, VOUT 15mV (VCC 50mV) VOUT 0.15V (VCC 0.3V) UNITS
MAX4236/MAX4237
+5V, connected 100k Output Voltage Swing VOUT +5V, connected VCC/2, Output Short-Circuit Current Gain-Bandwidth Product Slew Rate Settling Time Total Harmonic Distortion IOUT(SC) GBWP Shorted Shorted +5V, VOUT step VOUT settling within 0.01%
V/µs
MAX4236 MAX4237 MAX4236 MAX4237 MAX4236 MAX4237
0.001
5kHz, VOUT 2Vp-p,
SOT23, Very High Precision, 3V/5V Rail-To-Rail Amps MAX4236/MAX4237
ELECTRICAL CHARACTERISTICS (SO-8 µMAX-8) (continued)
(VCC +2.4V +5.5V, VOUT VCC/2, 100k VCC/2, TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER Input Capacitance Input Voltage Noise Density Input Noise Voltage Capacitive Load Stability Shutdown Mode Output Leakage SHDN Logic SHDN Logic High SHDN Input Current Shutdown Delay Time Shutdown Recovery Time t(SH) t(EN) SYMBOL enp-p CLOAD IOUT(SH) SHDN 100kHz 1kHz 0.1Hz 10Hz sustained oscillations MAX4236 MAX4237 CONDITIONS ±0.01 ±1.0 UNITS nV/Hz µVp-p
Device shutdown mode (SHDN VEE) VOUT
ELECTRICAL CHARACTERISTICS (SOT23-6)
(VCC +2.4V +5.5V, VOUT VCC/2, 100k VCC/2, TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER Supply Voltage Range SYMBOL CONDITIONS Guaranteed PSRR test Quiescent Supply Current Input Offset Voltage Input Offset Voltage Temperature Coefficient (Note Input Bias Current Input Offset Current Input Resistance Input Common-Mode Voltage normal mode shutdown mode normal mode shutdown mode +25°C TMIN TMAX ±0.6 1000 -0.15 ±600 ±5.5 ±500 UNITS
TCVOS
(Note (Note Differential common mode Guaranteed CMRR test +5V, -0.15V (VCC 1.2V) +3.0V; -0.15V (VCC 1.2V) +25°C TMIN TMAX +25°C TMIN TMAX
µV/°C
Common-Mode Rejection Ratio
CMRR
SOT23, Very High Precision, 3V/5V Rail-To-Rail Amps
ELECTRICAL CHARACTERISTICS (SOT23-6) (continued)
(VCC +2.4V +5.5V, VOUT VCC/2, 100k VCC/2, TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER Power-Supply Rejection Ratio SYMBOL PSRR CONDITIONS +2.4V +5.5V +25°C TMIN TMAX 100k, VOUT 15mV (VCC 50mV) VOUT 0.15V (VCC 0.3V) 100k, VOUT 15mV (VCC 50mV) VOUT 0.15V (VCC 0.3V) 100k, VOUT 15mV (VCC 50mV) VOUT 0.15V (VCC 0.3V) 100k, VOUT 15mV (VCC 50mV) VOUT 0.15V (VCC 0.3V) UNITS
MAX4236/MAX4237
+5V, connected VCC/2, +25°C
+5V, connected VCC/2, TMIN TMAX Large-Signal Voltage Gain AVOL +3V, connected VCC/2, +25°C
+3V, connected VCC/2, TMIN TMAX
+5V, connected VCC/2, 100k Output Voltage Swing VOUT +5V, connected VCC/2, Shorted Output Short-Circuit Current IOUT(SC) Shorted Gain-Bandwidth Product Slew Rate GBWP 15pF +5V, VOUT step
MAX4236 MAX4237 MAX4236 MAX4237 V/µs
SOT23, Very High Precision, 3V/5V Rail-To-Rail Amps MAX4236/MAX4237
ELECTRICAL CHARACTERISTICS (SOT23-6) (continued)
(VCC +2.4V +5.5V, VOUT VCC/2, 100k VCC/2, TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER Settling Time Total Harmonic Distortion Input Capacitance Input Voltage Noise Density Input Noise Voltage Capacitive Load Stability Shutdown Mode Output Leakage SHDN Logic SHDN Logic High SHDN Input Current Shutdown Delay Time Shutdown Recovery Time t(SH) t(EN) SYMBOL enp-p CLOAD CONDITIONS VOUT settling within 0.01% MAX4236 MAX4237 0.001 MAX4236 sustained oscillations MAX4237 IOUT(SH) SHDN Device shutdown mode (SHDN VEE) VOUT ±0.01 ±1.0 UNITS nV/Hz µVp-p
5kHz, VOUT 2Vp-p, 100kHz 1kHz 0.1Hz 10Hz
Note devices 100% production tested +25°C; specifications over temperature guaranteed design, unless otherwise specified. Note Guaranteed design, production tested. Note Maxim specification limits temperature coefficient offset voltage (TCVOS) 100% tested A-grade, 8pin µMAX packages.
Typical Operating Characteristics
(VCC +5V, VCC/2, 100k VCC/2, +25°C, unless otherwise noted.)
DISTRIBUTION
4236 toc01
TCVOS DISTRIBUTION
MAX4236 toc02
OFFSET VOLTAGE TEMPERATURE
OFFSET VOLTAGE (µV)
MAX4236 toc02
PERCENT UNITS (µV)
PERCENT UNITS
-2.0 -1.5 -1.0 -0.5 TCVOS (µV/°C)
TEMPERATURE (°C)
SOT23, Very High Precision, 3V/5V Rail-To-Rail Amps MAX4236/MAX4237
Typical Operating Characteristics (continued)
(VCC +5V, VCC/2, 100k VCC/2, +25°C, unless otherwise noted.)
COMMON-MODE REJECTION RATIO COMMON-MODE INPUT VOLTAGE
MAX4236 toc04
COMMON-MODE REJECTION RATIO COMMON-MODE INPUT VOLTAGE
COMMON-MODE REJECTION RATIO (dB) COMMON-MODE REJECTION RATIO (dB)
MAX4236 toc05
COMMON-MODE REJECTION RATIO FREQUENCY (VCC
MAX4236 toc06
COMMON-MODE REJECTION RATIO (dB)
0.01
COMMON-MODE INPUT VOLTAGE
COMMON-MODE INPUT VOLTAGE
FREQUENCY (kHz)
1000 10,000
COMMON-MODE REJECTION RATIO FREQUENCY (VCC
MAX4236 toc07
POWER-SUPPLY REJECTION RATIO FREQUENCY (VCC
MAX4236 toc08
COMMON-MODE REJECTION RATIO (dB)
PSSR (dB)
MAX4237 OPEN-LOOP GAIN/PHASE FREQUENCY MAX4236 toc09
GAIN (dB) GAIN PHASE
PHASE (DEGREES)
0.01 1000 10,000 FREQUENCY (kHz)
1000 10,000 FREQUENCY (kHz)
0.001 0.01 1000 10,000 100,000 5V/3V 15pF/200pF
FREQUENCY (kHz)
MAX4236 OPEN-LOOP GAIN/PHASE FREQUENCY MAX4236 toc10
PHASE
INPUT VOLTAGE NOISE FREQUENCY
MAX4236 toc11
VOUT 2Vp-p NOISE
GAIN
PHASE (DEGREES)
GAIN (dB)
INPUT VOLTAGE NOISE (nVHz)
0.01
0.001 0.01 1000 10,000 5V/3V 15pF/200pF
0.01 FREQUENCY (kHz)
0.001
0.0001 FREQUENCY (Hz) 100k
FREQUENCY (kHz)
MAX4236 toc12
TOTAL HARMONIC DISTORTION PLUS NOISE FREQUENCY
SOT23, Very High Precision, 3V/5V Rail-To-Rail Amps MAX4236/MAX4237
Typical Operating Characteristics (continued)
(VCC +5V, VCC/2, 100k VCC/2, +25°C, unless otherwise noted.)
SUPPLY CURRENT TEMPERATURE
MAX4236 toc13
SUPPLY CURRENT SUPPLY VOLTAGE
MAX4236 toc14
LARGE-SIGNAL GAIN TEMPERATURE
GAIN (dB)
MAX4236 toc15
SUPPLY CURRENT (µA)
SUPPLY CURRENT (µA) +85°C +125°C
-40°C +25°C
TEMPERATURE (°C) SUPPLY VOLTAGE TEMPERATURE (°C)
MINIMUM OUTPUT VOLTAGE TEMPERATURE
MAX4236 toc16
MAXIMUM OUTPUT VOLTAGE TEMPERATURE
MAX4236 toc17
OUTPUT VOLTAGE SUPPLY VOLTAGE
OUTPUT VOLTAGE (mV) VEE, VOH,
MAX4236 toc18
MINIMUM OUTPUT VOLTAGE (mV) 5V/3V, 100k
MAXIMUM OUTPUT VOLTAGE (mV) 5V/3V, 100k
SUPPLY VOLTAGE
TEMPERATURE (°C)
TEMPERATURE (°C)
OUTPUT VOLTAGE SUPPLY VOLTAGE
MAX4236 toc19
OUTPUT SOURCE CURRENT OUTPUT VOLTAGE
MAX4236 toc20
OUTPUT SOURCE CURRENT OUTPUT VOLTAGE
OUTPUT SOURCE CURRENT (mA)
MAX4236 toc21
OUTPUT VOLTAGE (mV)
100k
OUTPUT SOURCE CURRENT (mA)
OUTPUT VOLTAGE OUTPUT VOLTAGE
SUPPLY VOLTAGE
SOT23, Very High Precision, 3V/5V Rail-To-Rail Amps MAX4236/MAX4237
Typical Operating Characteristics (continued)
(VCC +5V, VCC/2, 100k VCC/2, +25°C, unless otherwise noted.)
OUTPUT SINK CURRENT OUTPUT VOLTAGE
MAX4236 toc22
OUTPUT SINK CURRENT OUTPUT VOLTAGE
MAX4236 toc23
SHORT-CIRCUIT CURRENT TEMPERATURE
MAX4236 toc24
OUTPUT SINK CURRENT (mA)
OUTPUT
OUTPUT SINK CURRENT (mA)
OUTPUT
SHORT-CIRCUIT CURRENT (mA)
SHORTED (SOURCING CURRENT)
OUTPUT VOLTAGE
OUTPUT VOLTAGE
TEMPERATURE (°C)
SHORT-CIRCUIT CURRENT TEMPERATURE
MAX4236 toc25
TRANSFER CURVE (RLOAD 100k)
MAX4236 toc26
TRANSFER CURVE (RLOAD
OUTPUT VOLTAGE -0.5 -1.0 -1.5 -2.0 -2.5 VSUPPLY ±2.5V
MAX4236 toc27
SHORT-CIRCUIT CURRENT (mA) TEMPERATURE (°C) SHORTED (SINKING CURRENT)
OUTPUT VOLTAGE -0.5 -1.0 -1.5 -2.0 -2.5
VSUPPLY ±2.5V
-100
-100
DIFFERENTIAL INPUT VOLTAGE (µV)
DIFFERENTIAL INPUT VOLTAGE (µV)
MAX4236 NONINVERTING SMALL-SIGNAL RESPONSE
MAX4236 toc28
MAX4237 NONINVERTING SMALL-SIGNAL RESPONSE
MAX4236 toc29
INPUT 10mV/div
INPUT 10mV/div
OUTPUT 10mV/div 1µs/div ±2.5V 15pF 1V/V
OUTPUT 50mV/div
1µs/div ±2.5V 15pF 5V/V
SOT23, Very High Precision, 3V/5V Rail-To-Rail Amps MAX4236/MAX4237
Typical Operating Characteristics (continued)
(VCC +5V, VCC/2, 100k VCC/2, +25°C, unless otherwise noted.)
MAX4237 NONINVERTING LARGE-SIGNAL RESPONSE
MAX4236 toc30
MAX4237 NONINVERTING LARGE-SIGNAL RESPONSE
MAX4236 toc31
INPUT 200mV/div
INPUT 200mV/div
OUTPUT 1V/div
OUTPUT 1V/div
2µs/div ±2.5V 15pF 5V/V
1µs/div ±2.5V 100k, 15pF 5V/V
MAX4236 NONINVERTING LARGE-SIGNAL RESPONSE
MAX4236 toc32
MAX4236 NONINVERTING LARGE-SIGNAL RESPONSE
MAX4236 toc33
INPUT 1V/div
INPUT 1V/div
OUTPUT 1V/div
OUTPUT 1V/div
4µs/div ±2.5V 15pF 1V/V
4µs/div ±2.5V 100k, 15pF 1V/V
SOT23, Very High Precision, 3V/5V Rail-To-Rail Amps
Description
SOT23 SO/µMAX INSHDN N.C. Amplifier Output Negative Power Supply. Bypass with 0.1µF capacitor ground. Connect single-supply operation. Noninverting Amplifier Input Inverting Amplifier Input Shutdown Input. leave floating. Connect normal operation enter shutdown mode. Positive Supply Input. Bypass with 0.1µF capacitor ground. Connection. internally connected. NAME FUNCTION
MAX4236/MAX4237
Detailed Description
MAX4236/MAX4237 high-precision amps with CMOS input stage excellent features. combination tight maximum voltage offset, offset tempco very input current make them ideal high-precision circuits. They feature low-voltage operation, low-power consumption, high-current drive with rail-to-rail output swing high-gain bandwidth product.
output swings within 150mV power-supply rails with load. input ground sensing rail-to-rail output substantially increase dynamic range.
Power-Up Shutdown Mode
MAX4236/MAX4237 have shutdown option. When shutdown (SHDN) pulled low, supply current drops 0.1µA, amplifiers disabled with output high-impedance state. Pulling SHDN high enables amplifiers. turn-on time amplifiers come shutdown 4µs.
High Accuracy
MAX4236/MAX4237 maximum input offset voltage 20µV (5µV, typ) grade version 50µV grade version +25°C. maximum temperature coefficient offset voltage grade guaranteed 2µV/°C 4.5µV/°C respectively. parts have input bias current 1pA. Noise characteristics 14nV/Hz, frequency noise (0.1Hz 10Hz) 0.2µVp-p. CMRR 102dB, PSRR 120dB. combination what necessary design circuits process signals while keeping high signal-to-noise ratios, stages preceding high-resolution converters, when they produced sensors transducers generating very small outputs.
Applications Information
described above, characteristics MAX4236/MAX4237 excellent high-precision/ accuracy circuitry, high impedance, low-current, low-offset, noise specifications very attractive piezoelectric transducers applications. these applications, sensors generate amount electric charge proportional changes mechanical stress applied them. These charges transformed into voltage proportional applied force injecting them into capacitance then amplifying resulting voltage. voltage inverse function capacitance into which charges generated transducer/ sensor injected. This capacitance resistance that discharges define low-frequency response circuit. desirable, once preferred low-frequency response known, maintain capacitance possible, because amount necessary upstream amplification (and signal-to-noise ratio deterioration) directly proportional capacitance value. MAX4236/MAX4237 high-impedance, low11
Rail-to-Rail Outputs, Ground-Sensing Input
input common-mode range extends from (VEE 0.15V) (VCC 1.2V) with excellent common-mode rejection. Beyond this range, amplifier output nonlinear function input, does undergo phase reversal latch-up (see Typical Operating Characteristics).
SOT23, Very High Precision, 3V/5V Rail-To-Rail Amps MAX4236/MAX4237
current, low-noise inputs allow minimum capacitance used. Piezoresistive transducers applications require many same qualities. those applications MAX4236/MAX4237 high CMRR, PSRR, offset stability also good match. typical application piezoresistive transducer instrumentation amplifier design using MAX4236/MAX4237 shown Typical Application Circuit. general, MAX4236/MAX4237 good components application which amplifier with almost zero input current required, including highprecision, long time-constant integrators electrochemical sensors.
PART MAX4236EUT MAX4236AEUA MAX4236BEUA MAX4236AESA MAX4236BESA MAX4237EUT MAX4237AEUA MAX4237BEUA MAX4237AESA MAX4237BESA GRADE
Selector Guide
MINIMUM STABLE GAIN MARK AAUV AAUW
Power Supplies
MAX4236/MAX4237 operate from single +2.4V +5.5V power supply, from ±1.2V ±2.75V power supplies. power supply pin(s) must bypassed ground with 0.1µF capacitor close possible.
Typical Application Circuit
Layout Physical Design
good layout improves performance decreasing amount parasitic stray capacitance, inductance resistance amplifier's inputs, outputs, power-supply connections. Since parasitics might unavoidable, minimize trace lengths, resistor leads, place external components close pins possible. high impedance, input current applications, input lines guarding shielding, special grounding, other physical design layout techniques, mandatory good results expected. negative effects crosstalk, other forms interference noise (thermal, acoustic, etc.) must accounted prevented beforehand good performance type sensitive circuitry which MAX4236/MAX4237 likely used.
VOUT
MAX4236
LOAD CELL
MAX4236
Chip Information
TRANSISTOR COUNTS: PROCESS: BiCMOS
SOT23, Very High Precision, 3V/5V Rail-To-Rail Amps
Package Information
6LSOT.EPS
MAX4236/MAX4237
8LUMAXD.EPS
SOT23, Very High Precision, 3V/5V Rail-To-Rail Amps MAX4236/MAX4237
Package Information (continued)
SOICN.EPS
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.
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