MAX4488ASA+T

Instrumentation, Op Amps, Buffer Amps Overview

The MAX4488ASA+T is a single-channel, wideband operational amplifier manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single supply voltage ranging from +2.7V to +5.5V and draws 2.2mA of quiescent current per amplifier in normal mode. The device features a gain-bandwidth product of 42MHz and is internally compensated for stability at gains of +5V/V or greater. It includes a low-power shutdown mode that reduces supply current to 0.01µA and places outputs in a high-impedance state. Key electrical specifications include an input offset voltage of ±70µV, an input bias current of ±1pA, and a large-signal voltage gain of 120dB.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Ultra-low distortion performance with 0.0002% THD+N
• Low input voltage-noise density of 4.5nV/√Hz
• Rail-to-rail output swings with a 1kΩ load
• Input common-mode voltage range includes ground

Instrumentation, Op Amps, Buffer Amps Applications

• ADC Buffers
• DAC Output Amplifiers
• Low-Noise Microphone/Preamplifiers
• Digital Scales
• Strain Gauges/Sensor Amplifiers

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific package configuration matches the design requirements, as the MAX4488 family is available in multiple form factors including SOIC, µMAX, TDFN, and SOT23. Confirm the presence of the shutdown pin functionality if power conservation is critical, noting that this feature is exclusive to the MAX4475 and MAX4488 variants within the series. Ensure the application gain is set to +5V/V or higher to maintain stability with the 42MHz gain-bandwidth product.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select the MAX4488ASA+T when high bandwidth and low noise are required alongside rail-to-rail output capability. This component is suitable for applications demanding excellent DC characteristics, such as low input offset voltage and bias current. Designers should ensure the closed-loop gain is maintained at +5V/V or greater to utilize the full potential of the 42MHz gain-bandwidth product without compromising phase margin.

Instrumentation, Op Amps, Buffer Amps Part Context

The MAX4488ASA+T belongs to the MAX4475–MAX4478/MAX4488/MAX4489 family of wideband, low-noise, low-distortion operational amplifiers. While the MAX4475–MAX4478 variants are unity-gain stable with a 10MHz gain-bandwidth product, the MAX4488 and MAX4489 are decompensated devices optimized for gains of +5V/V or greater, offering a higher slew rate and a 42MHz gain-bandwidth product.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

The MAX4489ASA+ is a dual-channel alternative within the same family featuring identical electrical characteristics but containing two amplifiers instead of one.

Instrumentation, Op Amps, Buffer Amps FAQ

Is the MAX4488ASA+T unity-gain stable?

No, the MAX4488 is internally compensated for gains of +5V/V or greater. For unity-gain stability, the MAX4475 variant should be used.

What is the function of the SHDN pin on the MAX4488?

The SHDN pin enables a low-power shutdown mode that reduces the supply current to 0.01µA and places the amplifier's outputs into a high-impedance state.