MAX4236, MAX4237 SOT23, Very High Precision, 3V/5V Rail-to-Rail Op Amps

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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, A_V = 1V/V)
- 7.5MHz (MAX4237, A_V = 5V/V)
200pF Capacitive Load Handling Capability
Shutdown Mode: 0.1µA Quiescent Current, Places Output in a High-Impedance State
Available in Space-Saving SOT23 and µMAX Packages

	Battery-Powered Applications
	Electrochemical Sensors
	Instrumentation Amplifiers
	Piezoelectric Sensors
	Strain Gauges
	Thermocouple Amplifiers

Key Specifications: Operational Amplifiers

Part Number

Amps Per Pkg.

Rail to Rail

Min. Stable Closed Loop Gain (V/V)

Min. Total Supply (V)

Max. Total Supply (V)

Typ. Supply Current per Amp. (µA)

Max. V_OS (µV)

Typ. CMRR @ DC (dB)

Typ PSRR @ DC (dB)

Max. Input I_BIAS (nA)

Typ. Unity Gain BW (MHz)

Typ. Slew Rate (V/µs)

Input Voltage Noise Density (nV/√Hz)

Low Power Shutdown

Package

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^*

MAX4236

Output Only

2.4

5.5

350

103

120

0.5

1.7

0.3

Yes

SOIC/8
SOT-23/6
uMAX/8

-40 to +85

$0.65 @ 1k

MAX4237

7.5

1.3

$0.65 @ 1k

See All Operational Amplifiers (143)

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.