MAX9638AVB+

Instrumentation, Op Amps, Buffer Amps Overview

The MAX9638AVB+ is a dual-channel, single-supply CMOS operational amplifier featuring rail-to-rail input and output capabilities. It operates within a supply voltage range of 2.1V to 5.5V with a typical quiescent current of 36µA per channel. The device offers a gain-bandwidth product of 1.5MHz and a slew rate of 0.9V/µs. Input bias current is typically ±0.1pA at +25°C, rising to ±800pA across the -40°C to +125°C temperature range. The part includes an active-low shutdown mode reducing current to 1µA and is housed in a 10-pin UTQFN package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Ultra-low input bias current suitable for high-impedance sensor interfaces
• Rail-to-rail input and output stages for maximum dynamic range
• Active-low shutdown mode for significant power conservation

Instrumentation, Op Amps, Buffer Amps Applications

• Portable medical instruments
• Piezoelectric transducer amplifiers
• Smoke detectors
• Transimpedance amplifiers for photodiodes

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix AVB+ corresponds to the 10-pin UTQFN package variant. Confirm RoHS compliance status as indicated by the plus sign. Ensure the design supports the specified automotive temperature range if operating in extreme environments. Check pinout compatibility against existing PCB layouts due to the specific UTQFN footprint requirements.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when low noise and ultra-low bias current are critical for interfacing with high-impedance sources like photodiodes. The dual-channel configuration saves board space compared to using two single-channel devices. Consider the shutdown feature for battery-powered applications requiring extended standby life. Verify capacitive load driving requirements against the stability graphs provided in the datasheet.

Instrumentation, Op Amps, Buffer Amps Part Context

This device belongs to the MAX9636/MAX9637/MAX9638 family of low-power, low-noise CMOS op amps. While sharing similar electrical characteristics, the MAX9638 is distinguished by its dual-channel architecture and 10-pin UTQFN packaging. This contrasts with the single-channel MAX9636 in SC70 and the dual-channel MAX9637 in SC70.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct functional replacements within the same package include the MAX9637AVB+, though pinout differences must be verified. Single-channel equivalents like the MAX9636AVB+ require circuit redesign. Cross-family replacements from other manufacturers require careful evaluation of bias current and bandwidth specifications.