AD8278ARZ-RL

Instrumentation, Op Amps, Buffer Amps Overview

The AD8278ARZ-RL is a single-channel, low-power difference amplifier manufactured by Analog Devices Inc. It operates on supply voltages ranging from 2 V to 36 V (single) or ±2 V to ±18 V (dual). The device features a maximum quiescent supply current of 200 μA and a bandwidth of 1 MHz at G = ½. It provides a minimum common-mode rejection ratio (CMRR) of 80 dB and an enhanced slew rate of 1.4 V/μs. The input voltage range extends well beyond the supply rails, offering rugged overvoltage protection. The component is housed in an 8-lead SOIC package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Provides high common-mode rejection with integrated laser-trimmed resistors for precision signal conditioning.
• Supports wide supply ranges and inputs that extend significantly beyond the power rails.
• Features built-in short-circuit protection and ESD circuitry for robust operation.

Instrumentation, Op Amps, Buffer Amps Applications

• Voltage measurement and monitoring
• Current measurement and monitoring
• Instrumentation amplifier building block
• Portable, battery-powered equipment

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific grade (B or A) required for your application, as offset voltage and CMRR specifications vary between grades. Confirm the package type matches the design footprint, as the AD8278 series includes MSOP and SOIC options. Ensure the ordering suffix corresponds to the desired reel quantity and packaging format. Cross-reference the datasheet revision to confirm all electrical parameters align with the current manufacturing standards.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when a low-power solution is needed for precision differential signaling. The AD8278 offers a smaller size and lower cost compared to discrete resistor networks. Consider the B Grade for tighter offset and drift specifications if higher accuracy is required. Verify that the capacitive load drive capability meets the requirements of the downstream circuitry to ensure stability.

Instrumentation, Op Amps, Buffer Amps Part Context

The AD8278 is part of a family of general-purpose difference amplifiers designed for power-critical applications. It shares architectural similarities with the AD8279, which offers dual channels in a 14-lead package. Unlike the unity-gain AD8276, the AD8278 supports gains of ½ and 2, providing flexibility for various signal conditioning needs within the same low-power envelope.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

For unity-gain difference amplifier applications with similar performance characteristics, refer to the AD8276 data sheet. If a dual-channel configuration is required instead of a single channel, consider the AD8279. These alternatives share the same manufacturer and low-power design philosophy but differ in gain configurations and pin counts.