AD8691AUJZ-R2

Overview

The AD8691AUJZ-R2 is a single-channel, rail-to-rail output CMOS operational amplifier from Analog Devices. It operates on a single supply voltage ranging from 2.7 V to 6 V and is housed in a 5-lead TSOT package. The device features a typical offset voltage of 400 µV with a maximum drift of 12 µV/°C. Input bias current is typically 0.2 pA, reaching a maximum of 1 pA at room temperature. The gain-bandwidth product is 10 MHz, and the slew rate is 5 V/µs. Voltage noise density is 8 nV/√Hz at 1 kHz. Supply current per amplifier is approximately 0.95 mA. It functions within an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Rail-to-rail output capability allows signal swing close to both supply rails.
• Low input bias current minimizes loading effects on high-impedance sources.
• Wide bandwidth supports high-speed signal processing applications.
• Single-supply operation simplifies power requirements for portable systems.

Applications

• Photodiode amplification
• Battery-powered instrumentation
• Medical instruments
• Multipole filters
• Portable audio devices

Procurement Notes

Verify the component matches the exact part number AD8691AUJZ-R2, noting the specific 5-lead TSOT package and reel packaging suffix. Confirm that the manufacturer is Analog Devices Inc. Ensure the device meets RoHS compliance standards as indicated by the Z suffix. Check for automotive qualification if required, though this specific commercial grade does not carry the W suffix. Validate the operating temperature range against application requirements.

Selection Notes

Select this component when low noise and precision are critical alongside wide bandwidth. The low offset voltage and drift make it suitable for sensor interfaces. Consider the small TSOT package for space-constrained designs. Verify that the single-supply voltage range aligns with the system power architecture. Evaluate the trade-off between the 10 MHz bandwidth and the relatively higher supply current compared to ultra-low-power alternatives.

Part Context

This device belongs to the AD8691/AD8692/AD8694 family of low-cost, low-noise CMOS operational amplifiers. While the AD8692 offers dual channels and the AD8694 provides four channels, the AD8691 is configured as a single amplifier. All variants share similar electrical characteristics but differ in channel count and package options such as MSOP, SOIC, and TSSOP. The AUJZ suffix specifically denotes the 5-lead TSOT package variant.

Replacement Considerations

Direct substitutes include other models within the same AD869x family, such as the AD8691AKSZ-R2 which uses a 5-lead SC70 package. Cross-referencing with other single-channel, rail-to-rail CMOS op-amps from different manufacturers requires careful comparison of pinouts, electrical specifications, and thermal characteristics to ensure functional compatibility.