AD8643TRZ-EP-R7

Overview

The AD8643TRZ-EP-R7 is a quad, low-power, precision JFET input operational amplifier with rail-to-rail output. It features a maximum supply current of 250 μA per amplifier and an extremely low input bias current of 1 pA. The device supports single-supply operation from 5 V to 26 V or dual-supply operation from ±2.5 V to ±13 V. It offers a gain-bandwidth product of up to 3.5 MHz and a slew rate of 3 V/μs at ±13 V. The unit is housed in a 14-lead SOIC package and operates within a military temperature range of −55°C to +125°C.

Feature Summary

• Supports defense and aerospace applications under the AQEC standard
• Features controlled manufacturing baseline with enhanced product change notification
• Provides unity-gain stability without phase reversal
• Maintains stability with capacitive loads exceeding 500 pF

Applications

• Line- or battery-powered instruments
• Photodiode amplifiers
• Precision current sensing
• Portable audio systems

Procurement Notes

Verify that the specific part number includes the -EP suffix to confirm it meets the Enhanced Product requirements for defense and aerospace use. Ensure the ordering suffix matches the required reel packaging format. Confirm RoHS compliance status as indicated by the Z suffix. Check for available qualification data if required for your specific application standards.

Selection Notes

Select this component when military-grade reliability and extended temperature performance are mandatory. The JFET input stage is optimal for high-impedance signal sources requiring minimal bias current. Consider the rail-to-rail output capability for maximizing dynamic range in single-supply systems. Verify that the 14-lead SOIC package fits the thermal and spatial constraints of the target PCB design.

Part Context

This part belongs to the AD8643-EP family, which is the enhanced product version of the standard AD8643 series. While the standard AD8643 is designed for industrial applications, the -EP variant is specifically qualified for harsh environments. It shares core electrical characteristics but differs in manufacturing controls and temperature specifications.

Replacement Considerations

The standard AD8643TRZ-REEL7 serves as the commercial equivalent but lacks the enhanced product features and military temperature range. Direct substitution requires verifying that the lower reliability standards of the commercial part are acceptable for the specific deployment environment.