ADA4627-1ACPZ-R2

Overview

The ADA4627-1ACPZ-R2 is a high-speed, low-noise JFET operational amplifier manufactured by Analog Devices Inc. It features a gain bandwidth product of 19 MHz and a slew rate of 82 V/µs. The device operates on dual supplies ranging from ±5 V to ±15 V with a maximum supply voltage of 30 V. Key electrical specifications include a maximum input offset voltage of 200 µV, an average drift of 1 µV/°C, and a maximum input bias current of 5 pA. Voltage noise density is 6.1 nV/√Hz at 1 kHz, with peak-to-peak noise of 0.86 µV in the 0.1 Hz to 10 Hz range. It offers a typical CMRR of 116 dB and PSRR of 112 dB. The component is housed in an 8-lead LFCSP package and supports an extended operating temperature range from -40°C to +125°C.

Feature Summary

• Combines precision DC characteristics with high-speed AC performance for sensitive measurement applications.
• Features very low input bias current and low offset voltage drift suitable for harsh environments.
• Designed without output phase reversal when inputs remain within or slightly above supply rails.

Applications

• High impedance sensors
• Photodiode amplifiers
• Precision instrumentation
• Phase-locked loop filters
• Medical equipment

Procurement Notes

Verify the specific suffix R2 against official documentation to confirm reel packaging and tape specifications. Ensure the ordering code matches the required LFCSP variant. Confirm availability status as distribution channels may list obsolete or limited stock items. Cross-reference the manufacturer part number directly with the datasheet to avoid substitution errors.

Selection Notes

Select this component for applications requiring both high DC accuracy and wide bandwidth. The unity-gain stability makes it suitable for general-purpose buffering and filtering. Consider the LFCSP package for space-constrained designs. Evaluate thermal resistance requirements given the 7 mA supply current and package type.

Part Context

This device belongs to the ADA4627/ADA4637 series of wide bandwidth precision amplifiers. It serves as the fully compensated, unity-gain stable counterpart to the decompensated ADA4637-1. Both share similar low noise and bias current characteristics but differ in stability requirements and gain bandwidth.

Replacement Considerations

The ADA4637-1 is a related decompensated version within the same family. Direct replacement requires ensuring the circuit maintains a noise gain of 5 or greater. Other single-channel JFET op-amps may require significant circuit redesign due to differing stability and noise profiles.

FAQ

Is the ADA4627-1ACPZ-R2 unity-gain stable?

Yes, the ADA4627-1 is a fully compensated amplifier that is stable at a noise gain of 1.

Does the device exhibit output phase reversal?

No, the ADA4627-1 is designed to prevent output phase reversal provided the inputs are maintained within or slightly above the power supply rails.