The MAX4236/MAX4237 are high-precision op amps
that feature an exceptionally low offset voltage and offset
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.
Key Features
Applications/Uses
Ultra-Low Offset Voltage
20µV (max) at +25°C (Grade A)
50µV (max) at +25°C (Grade B, 6-Pin SOT23)
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)
Ultra-Low 1pA Input Bias Current
High Open-Loop Voltage Gain: 110dB (min)
(RL = 100kΩ)
Compatible with +3V and +5V Single-Supply
Power Systems
Ground Sensing: Input Common-Mode Range
Includes Negative Rail
Rail-to-Rail Output Swing into a 1kΩLoad
350µA Quiescent Current
Gain-Bandwidth Product
1.7MHz (MAX4236, AV = 1V/V)
7.5MHz (MAX4237, AV = 5V/V)
200pF Capacitive Load Handling Capability
Shutdown Mode: 0.1µA Quiescent Current,
Places Output in a High-Impedance State
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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