AD8698ARZ

Overview

The AD8698ARZ is a dual precision operational amplifier featuring rail-to-rail output, low noise, and low input bias current. It offers a maximum offset voltage of 100 µV with drift below 2 µV/°C, eliminating the need for manual trimming. The device operates within a supply voltage range of ±2.5 V to ±15 V and supports an operating temperature from −40°C to +85°C. Key electrical parameters include a gain bandwidth product of 1 MHz, a slew rate of 0.4 V/µs, and a minimum common-mode rejection ratio of 118 dB.

Feature Summary

• Rail-to-rail output capability maximizes dynamic range in various applications.
• Low input bias current minimizes offset errors when interfacing with high impedance sensors.
• 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 MSOP and SOIC options. Confirm that the specific suffix corresponds to the desired packaging format. Ensure compatibility with the intended supply voltage range and environmental conditions before finalizing procurement.

Selection Notes

Select this component for applications requiring high DC accuracy and low noise without the complexity of external offset trimming. It is suitable for driving ADCs or DACs due to its rail-to-rail output swing. Consider the 1 MHz bandwidth when designing active filters or signal conditioning circuits for higher frequency signals.

Part Context

The AD8698 belongs to Analog Devices' family of precision operational amplifiers designed for high-accuracy signal processing. It provides dual channels in a compact surface-mount package, making it ideal for space-constrained designs. The device addresses the need for precision in sensor interfaces and data acquisition systems.

Replacement Considerations

Check datasheets for alternative dual op-amps with similar offset voltage, bandwidth, and package dimensions. Verify pinout compatibility and electrical specifications such as supply voltage range and output swing characteristics before substitution.

FAQ

Does the AD8698 experience phase reversal when inputs exceed the supply rails?

No, the AD8698 features internal protection that prevents phase reversal even when input voltages exceed the supply rails.

What is the maximum recommended load capacitance for stable operation?

The AD8698 is stable driving capacitive loads well over 10 nF. For loads exceeding 50 nF, an external snubber network is recommended to maintain stability.