AD8332ACPZ-RL

Overview

The AD8332ACPZ-RL is a dual-channel, ultralow noise linear-in-dB variable gain amplifier (VGA) from Analog Devices. It integrates an LNA with 19 dB gain and an X-AMP VGA providing 48 dB of range. The device operates on a single 5 V supply within the -40°C to +85°C temperature range. Key electrical parameters include a 100 MHz bandwidth, 650 V/µs slew rate, and 0.74 nV/√Hz input voltage noise. It features programmable input impedance matching and selectable output clamping levels.

Feature Summary

• Integrates an ultralow noise preamplifier with a 48 dB gain range X-AMP VGA and a selectable postamplifier in each channel.
• Provides precise linear-in-dB gain control scaling of 50 dB/V for control voltages between 40 mV and 1 V.
• Features active input impedance matching that allows signal source matching without compromising noise performance.
• Includes differential signal paths to ensure excellent second- and third-order distortion performance and low crosstalk.

Applications

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

Procurement Notes

Verify the specific package configuration against the datasheet ordering guide, as the AD8332 is available in both 28-lead TSSOP and 32-lead LFCSP packages. Confirm that the ACPZ suffix corresponds to the lead frame chip scale package variant required for your design. Ensure compatibility with the single 5 V supply requirement and check the thermal dissipation specifications for the selected package type during implementation.

Selection Notes

Select this component when designing systems requiring dual-channel variable gain amplification with minimal added noise. It is specifically optimized for driving high-speed analog-to-digital converters due to its low output-referred noise and wide dynamic range. Consider the programmable input impedance feature if direct source matching is necessary without degrading the noise figure. Evaluate the power consumption per channel against system constraints.

Part Context

This part belongs to the AD8331/AD8332/AD8334 family of ultralow noise VGAs. While the AD8331 offers a single channel and the AD8334 provides four channels, the AD8332 serves as the dual-channel solution. All variants share similar internal architectures, including the X-AMP technology and integrated preamplifiers, but differ in channel count and physical packaging options.

Replacement Considerations

Direct functional replacements within the same family include the AD8331 for single-channel applications or the AD8334 for quad-channel requirements. Verify pinout compatibility if substituting between different package types such as TSSOP and LFCSP, as pin assignments may vary significantly across these form factors.