AD627BN

Instrumentation, Op Amps, Buffer Amps Overview

The AD627BN is a micropower instrumentation amplifier from Analog Devices, featuring rail-to-rail output swing on single and dual supplies ranging from +2.2 V to ±18 V. It operates with a maximum supply current of 85 μA. The device offers high accuracy DC performance, including 0.03% typical gain accuracy at G=+5 and 10 ppm/°C typical gain drift. Input offset voltage is maximized at 125 μV for the B grade in dual supply configurations, with a drift of 1 μV/°C. AC specifications include a minimum CMRR of 83 dB at G=+5, an 80 kHz bandwidth, and 135 μs settling time to 0.01% for a 5 V step.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Micropower operation with maximum supply current of 85 μA
• Rail-to-rail output swing capability on single and dual supplies
• High accuracy DC performance with low input offset voltage and drift
• Gain set easily with one external resistor

Instrumentation, Op Amps, Buffer Amps Applications

• 4 to 20 mA loop-powered applications
• Low power medical instrumentation such as ECG and EEG
• Transducer interfacing
• Thermocouple amplifiers
• Portable battery-powered instruments

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific grade suffix (B) against the official Analog Devices datasheet to confirm DC parameters like input offset voltage and CMRR. Ensure the package type matches the required PCB layout. Check for obsolescence status or lifecycle changes directly from the manufacturer before finalizing procurement plans.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select the AD627BN when low power consumption is critical alongside high precision requirements. It is suitable for designs needing rail-to-rail output without sacrificing DC accuracy. Compare its 85 μA current draw and 80 kHz bandwidth against other instrumentation amplifiers to ensure it meets the system's dynamic range and noise floor constraints.

Instrumentation, Op Amps, Buffer Amps Part Context

The AD627 series represents Analog Devices' solution for micropower instrumentation amplification. The AD627BN specifically denotes the B-grade version, which offers tighter DC specifications compared to the A-grade variant. It belongs to a family designed to replace discrete three-op-amp designs with higher performance and lower power consumption.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Check for direct pin-compatible replacements within the AD627 family, such as the AD627AN, noting differences in DC accuracy grades. Verify if newer generations offer improved specifications while maintaining the same footprint and power profile.