AD8628AUJZ-REEL7

Overview

The AD8628AUJZ-REEL7 is a single-channel, zero-drift operational amplifier from Analog Devices Inc., housed in a 5-lead TSOT package. It operates on a single supply voltage ranging from 2.7 V to 5 V (±1.35 V to ±2.5 V dual). Key electrical parameters include a maximum input offset voltage of 10 µV and an input bias current of 100 pA. The device features a gain-bandwidth product of 2.5 MHz, a slew rate of 1 V/µs, and a supply current of 1.1 mA. It offers rail-to-rail input and output swing with high CMRR and PSRR of 130 dB.

Feature Summary

• Utilizes a patented ping-pong auto-zeroing and chopping topology to eliminate 1/f noise and minimize digital switching artifacts.
• Provides rail-to-rail input and output capability without requiring external components or complex input biasing networks.
• Features extremely low input offset voltage drift and ultralow peak-to-peak noise for high DC precision.
• Delivers rapid overload recovery time due to internal settling within two clock cycles after output saturation.

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 package type and reel quantity. Ensure the component meets RoHS compliance requirements if applicable to the target assembly process. Confirm that the automotive qualification status aligns with project specifications, as commercial and automotive grades may have distinct reliability reporting standards.

Selection Notes

Select this component when system design requires minimal offset voltage drift over wide temperature ranges without external trimming. The rail-to-rail I/O functionality simplifies circuit architecture by maximizing signal-to-noise ratio and reducing input biasing complexity. Consider the 5-lead TSOT package for applications demanding compact footprint solutions while maintaining high precision performance characteristics.

Part Context

This part belongs to the AD8628/AD8629/AD8630 family of zero-drift, single-supply, rail-to-rail input/output operational amplifiers. The AD8628 variant specifically denotes the single-channel configuration available in various plastic packages including TSOT, SOT-23, and SOIC. The family combines low cost with high accuracy, targeting applications where error sources cannot be tolerated.

Replacement Considerations

Direct substitutes within the same family include AD8628ARTZ and AD8628ARZ, which offer identical electrical specifications but differ in package style (SOT-23 and SOIC respectively). Verify pinout compatibility and thermal characteristics when transitioning between package types.

FAQ

How does the AD8628 handle 1/f noise?

The amplifier internally eliminates 1/f noise through its auto-zeroing mechanism, which corrects dc and low-frequency offsets, thereby preventing pink noise errors from appearing at the output.

What is the behavior regarding output phase reversal?

The AD8628 is designed to prevent output phase reversal provided both inputs remain within the supply voltages. If inputs exceed supply rails, series resistors should be used to limit current below 5 mA to maintain stability.