Datasheet MAX4236, MAX4237 (Maxim)

19-2110; Rev 0; 8/01
SOT23, Very High Precision, 3V/5V Rail-to-Rail Op Amps MAX4236/MAX4237 General Description Features
The MAX4236/MAX4237 are high-precision op amps ♦
Ultra-Low Offset Voltage
that feature an exceptionally low offset voltage and off-
20µV (max) at +25°C (Grade A)
set voltage temperature coefficient without using any
50µV (max) at +25°C (Grade B, 6-Pin SOT23)
chopper techniques. The MAX4236 and MAX4237 have a typical large-signal, open-loop voltage gain of 120dB. ♦
Ultra-Low Offset Voltage Drift
These devices have an ultra-low input-bias current of
2µV/°C (max) (Grade A)
1pA. The MAX4236 is unity-gain stable with a gain-
4.5µV/°C (max) (Grade B, 6-Pin SOT23)
bandwidth product of 1.7MHz, while the MAX4237 is
5.5µV/°C (max) (6-Pin SOT23)
stable for closed-loop gains greater than 5V/V with a ♦
Ultra-Low 1pA Input Bias Current
gain-bandwidth product of 7.5MHz. Both devices have a shutdown function in which the quiescent current is ♦
High Open-Loop Voltage Gain: 110dB (min)
reduced to less than 0.1µA, and the amplifier output is
(RL = 100k
Ω
)
forced into a high-impedance state. ♦
Compatible with +3V and +5V Single-Supply
The input common-mode range of the MAX4236/
Power Systems
MAX4237 extends below the negative supply range, and the output swings Rail-to-Rail®. These features make the ♦
Ground Sensing: Input Common-Mode Range
amplifiers ideal for applications with +3V or +5V single
Includes Negative Rail
power supplies. The MAX4236/MAX4237 are specified for ♦
Rail-to-Rail Output Swing into a 1k
Ω
Load
the extended temperature range (-40°C to +85°C) and are available in tiny SOT23, µMAX, and SO packages. For ♦
350µA Quiescent Current
greater accuracy, the A grade µMAX and SO packages ♦
Gain-Bandwidth Product
are tested to guarantee 20µV (max) offset voltage at +25°C and less then 2µV/°C drift.
1.7MHz (MAX4236, AV = 1V/V) 7.5MHz (MAX4237, AV = 5V/V) Applications
♦
200pF Capacitive Load Handling Capability
Strain Gauges ♦
Shutdown Mode: 0.1µA Quiescent Current,
Piezoelectric Sensors
Places Output in a High-Impedance State
Thermocouple Amplifiers ♦
Available in Space-Saving SOT23 and µMAX
Electrochemical Sensors
Packages
Battery-Powered Instrumentation Instrumentation Amplifiers
Ordering Information
Rail-to-Rail is a registered trademark of Nippon Motorola, Inc.
PART TEMP. RANGE PIN-PACKAGE Pin Configurations MAX4236
EUT-T -40°C to +85°C 6 SOT23-6 MAX4236AEUA -40°C to +85°C 8 µMAX TOP VIEW MAX4236BEUA -40°C to +85°C 8 µMAX MAX4236AESA -40°C to +85°C 8 SO N.C. 1 8 SHDN OUT 1 6 VCC IN- 2 7 V MAX4236BESA -40°C to +85°C 8 SO CC MAX4236A/B IN+ 3 6 OUT MAX4237A/B
MAX4237
EUT-T -40°C to +85°C 6 SOT23-6 VEE 2 MAX4236 5 SHDN VEE 4 5 N.C. MAX4237 MAX4237AEUA -40°C to +85°C 8 µMAX
SO-8/
µ
MAX
MAX4237BEUA -40°C to +85°C 8 µMAX IN+ 3 4 IN- MAX4237AESA -40°C to +85°C 8 SO MAX4237BESA -40°C to +85°C 8 SO
SOT23-6 ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.