MAX4237

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 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 gainbandwidth 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. 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-Pi...