AD8698AR

Overview

The AD8698AR is a dual precision operational amplifier featuring rail-to-rail output capability. It offers a maximum offset voltage of 100 µV and a drift rate below 2 µV/°C, eliminating the need for manual trimming. The device provides a gain bandwidth product of 1 MHz and a slew rate of 0.4 V/µs. Input bias current is limited to 700 pA, with an input noise density of 8 nV/√Hz at 1 kHz. Common-mode rejection ratio reaches 118 dB minimum. It operates on supply voltages from ±2.5 V to ±15 V within a temperature range of −40°C to +85°C.

Feature Summary

• Rail-to-rail output maximizes dynamic range in various applications.
• High precision characteristics minimize offset errors due to low bias and offset currents.
• Internal protective circuitry allows input voltages to exceed supply rails without phase reversal.

Applications

• Photodiode amplifiers
• Sensors and controls
• Multipole filters
• Integrators

Procurement Notes

Verify the package type matches the required footprint, as the AD8698 series includes both SOIC-8 and MSOP-8 options. Confirm that the specific suffix corresponds to the desired reel or tube packaging configuration. Ensure the operating environment remains within the specified temperature limits to maintain guaranteed electrical performance parameters.

Selection Notes

Select this component when high DC accuracy and low noise are critical requirements. The rail-to-rail output makes it suitable for single-supply systems requiring maximum signal swing. Consider its stability with capacitive loads and suitability for driving ADCs directly without external isolation resistors.

Part Context

This part belongs to Analog Devices' precision operational amplifier family. It is designed for applications requiring high impedance sensing and minimal offset drift over temperature variations. The dual configuration allows for cost-effective implementation of complex analog signal conditioning circuits.

Replacement Considerations

AD8698ARM-R2

FAQ

Does the AD8698 experience phase reversal when inputs exceed the common-mode range?

No, the device is designed to operate without phase reversal even when input voltages approach or exceed the supply rails.

Can the AD8698 drive heavy capacitive loads directly?

Yes, the amplifier is stable when driving heavy capacitive loads, though external compensation is recommended for loads exceeding 50 nF.