AD8629ARZ-REEL7

Overview

The AD8629ARZ-REEL7 is a dual-channel, zero-drift operational amplifier from Analog Devices. It features rail-to-rail input and output swing with a supply voltage range of 2.7 V to 5.5 V. Key electrical parameters include a maximum offset voltage of 1 µV, an input bias current of 100 pA, and a gain-bandwidth product of 2.5 MHz at 5 V. The device offers a slew rate of 1 V/µs, low noise density of 22 nV/√Hz, and high CMRR and PSRR of 130 dB. It operates within an extended temperature range of -40°C to +125°C and is housed in an 8-lead SOIC package.

Feature Summary

• Combines auto-zeroing and chopping techniques to eliminate 1/f noise and minimize DC offset drift.
• Provides rail-to-rail input and output capability for maximizing signal-to-noise ratio.
• Features extremely low input bias current and ultralow offset voltage for high precision.
• Designed without external components for calibration or filtering.

Applications

• Automotive sensors
• Pressure and position sensors
• Strain gage amplifiers
• Medical instrumentation
• Thermocouple amplifiers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging details and automotive qualification status. Ensure that the selected variant matches the required package type and temperature range specifications for the intended application environment.

Selection Notes

Select this component when system requirements demand minimal DC error sources such as offset voltage and drift over wide temperature variations. The rail-to-rail I/O functionality simplifies biasing networks while maintaining high accuracy in single-supply configurations.

Part Context

This part belongs to the AD8628/AD8629/AD8630 family of zero-drift amplifiers. The AD8629 specifically denotes the dual-channel version of this series, offering high precision and low noise characteristics suitable for demanding measurement applications.

Replacement Considerations

The AD8629ARZ serves as the tube-packaged equivalent to the REEL7 variant. Other members of the family include the single-channel AD8628 and quad-channel AD8630.

FAQ

Does the AD8629 exhibit output phase reversal?

No, the AD8629 is designed to prevent output phase reversal provided both inputs are maintained within the supply voltages.

How does the AD8629 handle overload recovery?

Internal settling occurs within two clock cycles after output saturation, resulting in a short recovery time of less than 10 µs.