MAX4236 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – SOT23, Very High Precision, 3V/5V Rail-to-Rail Op Amps

19-2110; Rev 0; 8/01
SOT23, Very High Precision, 3V/5V
Rail-to-Rail Op Amps
General Description
The MAX4236/MAX4237 are high-precision op amps
that feature an exceptionally low offset voltage and off-
set voltage temperature coefficient without using any
chopper techniques. The MAX4236 and MAX4237 have
a typical large-signal, open-loop voltage gain of 120dB.
These devices have an ultra-low input-bias current of
1pA. The MAX4236 is unity-gain stable with a gain-
bandwidth product of 1.7MHz, while the MAX4237 is
stable for closed-loop gains greater than 5V/V with a
gain-bandwidth product of 7.5MHz. Both devices have
a shutdown function in which the quiescent current is
reduced to less than 0.1µA, and the amplifier output is
forced into a high-impedance state.
The input common-mode range of the MAX4236/
MAX4237 extends below the negative supply range, and
the output swings Rail-to-Rail^®. These features make the
amplifiers ideal for applications with +3V or +5V single
power supplies. The MAX4236/MAX4237 are specified for
the extended temperature range (-40°C to +85°C) and
are available in tiny SOT23, µMAX, and SO packages. For
greater accuracy, the A grade µMAX and SO packages
are tested to guarantee 20µV (max) offset voltage at
+25°C and less then 2µV/°C drift.
Applications
Strain Gauges
Piezoelectric Sensors
Thermocouple Amplifiers
Electrochemical Sensors
Battery-Powered Instrumentation
Instrumentation Amplifiers
Rail-to-Rail is a registered trademark of Nippon Motorola, Inc.
Pin Configurations
TOP VIEW
OUT 1
V_EE 2
IN+ 3
MAX4236
MAX4237
6 V_CC
N.C. 1
IN- 2
5 SHDN
IN+ 3
V_EE 4
MAX4236A/B
MAX4237A/B
8 SHDN
7 V_CC
6 OUT
5 N.C.
4 IN-
SO-8/µMAX
SOT23-6
Features
o Ultra-Low Offset Voltage
20µV (max) at +25°C (Grade A)
50µV (max) at +25°C (Grade B, 6-Pin SOT23)
o Ultra-Low Offset Voltage Drift
2µV/°C (max) (Grade A)
4.5µV/°C (max) (Grade B, 6-Pin SOT23)
5.5µV/°C (max) (6-Pin SOT23)
o Ultra-Low 1pA Input Bias Current
o High Open-Loop Voltage Gain: 110dB (min)
(R_L = 100kΩ)
o Compatible with +3V and +5V Single-Supply
Power Systems
o Ground Sensing: Input Common-Mode Range
Includes Negative Rail
o Rail-to-Rail Output Swing into a 1kΩ Load
o 350µA Quiescent Current
o Gain-Bandwidth Product
1.7MHz (MAX4236, A_V = 1V/V)
7.5MHz (MAX4237, A_V = 5V/V)
o 200pF Capacitive Load Handling Capability
o Shutdown Mode: 0.1µA Quiescent Current,
Places Output in a High-Impedance State
o Available in Space-Saving SOT23 and µMAX
Packages
PART
MAX4236EUT-T
MAX4236AEUA
MAX4236BEUA
MAX4236AESA
MAX4236BESA
MAX4237EUT-T
MAX4237AEUA
MAX4237BEUA
MAX4237AESA
MAX4237BESA
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
6 SOT23-6
8 µMAX
8 µMAX
8 SO
8 SO
6 SOT23-6
8 µMAX
8 µMAX
8 SO
8 SO
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