AD8574AR-REEL

Overview

The AD8574AR-REEL is a quad precision rail-to-rail chopper operational amplifier from Analog Devices. It operates on a single supply of 2.7 V to 5 V. Key electrical parameters include a typical offset voltage of 1 μV, input bias current of 10 pA, and gain bandwidth product of 1.5 MHz. The device features 145 dB typical large signal voltage gain, 140 dB CMRR, and 130 dB PSRR. Supply current is 750 μA per op amp. It operates within an extended temperature range of -40°C to +125°C.

Feature Summary

• Zero-drift architecture using spread-spectrum auto-zero technique to eliminate intermodulation distortion
• Rail-to-rail input and output swing capabilities
• Ultralow offset voltage and drift characteristics
• No external capacitors required for operation

Applications

• Temperature sensors
• Pressure sensors
• Precision current sensing
• Strain gage amplifiers
• Medical instrumentation

Procurement Notes

Verify the specific package suffix 'R' corresponds to the SOIC-14 form factor when ordering. Confirm that the '-REEL' designation indicates tape and reel packaging suitable for automated assembly processes. Ensure compatibility with the intended PCB footprint and soldering profile for surface-mount technology applications.

Selection Notes

Select this component for applications requiring high DC precision without external compensation components. The quad configuration allows multiple channels in a single package. Consider the 1.5 MHz bandwidth for AC signal integrity. Verify power supply constraints align with the 2.7 V to 5 V operating range.

Part Context

This part belongs to the AD857x family of zero-drift amplifiers, which includes single (AD8571), dual (AD8572), and quad (AD8574) variants. All share identical electrical specifications but differ in channel count and pinout configurations. The family utilizes CMOS technology with random frequency auto-zero stabilization.

Replacement Considerations

Direct functional substitutes within the same family include AD8571ARZ and AD8572ARZ, noting differences in channel count and package pinouts. Cross-family replacements require verification of pin compatibility and electrical parameter alignment.

FAQ

Does the AD8574 require external capacitors for stability?

No, the AD8574 does not require external capacitors for operation due to its internal auto-zero correction topology.

What is the maximum supply voltage for the AD8574?

The absolute maximum supply voltage rating is 6 V, though normal operation is specified between 2.7 V and 5 V.