AD8332ACPZ-R2

Overview

The AD8332ACPZ-R2 is a dual-channel ultralow noise variable gain amplifier (VGA) from Analog Devices, featuring an integrated low-noise preamplifier and programmable input impedance. It operates on a single 5 V supply with a quiescent current of 27.5 mA per channel. The device provides a 48 dB gain range controlled by a linear-in-dB interface (50 dB/V slope). Key electrical parameters include a 100 MHz small-signal bandwidth, 650 V/µs slew rate, and 0.74 nV/√Hz voltage noise. It supports selectable output clamping levels and is housed in a 32-lead LFCSP package.

Feature Summary

• Integrates an ultralow noise preamplifier with 19 dB fixed gain and a 48 dB X-AMP® VGA stage within each channel.
• Features active input impedance matching capability via a single external resistor without compromising noise performance.
• Provides differential signal paths to ensure superior second- and third-order distortion performance and low crosstalk.
• Includes a selectable gain postamplifier with adjustable output limiting to prevent overload in subsequent stages.

Applications

• Ultrasound and sonar time-gain controls
• High performance automatic gain control (AGC) systems
• I/Q signal processing
• High speed, dual ADC drivers

Procurement Notes

Verify the specific suffix ACPZ-R2 against the manufacturer's ordering guide to confirm the lead frame chip scale package and reel quantity. Ensure the component meets RoHS compliance requirements for your assembly process. Cross-reference the datasheet revision I specifications with your design constraints regarding operating temperature and supply voltage tolerances.

Selection Notes

Select this component when driving high-speed differential ADCs requiring low output-referred noise and wide dynamic range. The dual-channel architecture is suitable for applications needing matched gain characteristics between channels. Consider the LFCSP package for high-density layouts requiring efficient thermal dissipation through the exposed pad.

Part Context

This part belongs to the AD833x family of ultralow noise VGAs, which also includes the single-channel AD8331 and quad-channel AD8334. All variants share the same core X-AMP® technology and functional block diagram but differ in channel count and physical packaging. The AD8332 specifically addresses dual-channel requirements in compact form factors.

Replacement Considerations

Direct pin-compatible substitutes within the same series include the AD8332ARUZ (TSSOP package) and AD8332ACPZ (non-reel LFCSP). Verify that any replacement maintains the required 32-lead LFCSP footprint and thermal pad configuration if board space is constrained.