AD8332ACPZ-R7

Overview

The AD8332ACPZ-R7 is a dual-channel, ultralow noise linear-in-dB variable gain amplifier (VGA) from Analog Devices. It integrates an ultralow noise preamplifier (LNA), an X-AMP VGA with 48 dB range, and a selectable gain postamplifier. The device operates on a single 5 V supply with a 100 MHz bandwidth and 650 V/µs slew rate. Gain control is provided via a 0 to 1 V input with 50 dB/V scaling. Key specifications include 0.74 nV/√Hz voltage noise, 48 nV/√Hz output-referred noise, and ±5 mV differential offset voltage. It features active input impedance matching, programmable output clamping, and operates within a -40°C to +85°C temperature range.

Feature Summary

• Integrates ultralow noise LNA, X-AMP VGA, and selectable postamplifier for optimized signal chain performance
• Provides precise linear-in-dB gain control with excellent channel-to-channel matching across the full gain range
• Features active input impedance matching that maintains low noise performance while adapting to source impedances
• Includes user-selectable output clamping level to prevent overload of subsequent ADC 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 package type against the ordering suffix; the AD8332 is available in both TSSOP and LFCSP packages. Confirm the presence of the exposed pad requirement for thermal management if using the LFCSP variant. Ensure the gain control interface voltage range aligns with the system's logic levels. Check for RoHS compliance status as per the latest manufacturer documentation.

Selection Notes

Select this component when ultralow noise performance is critical for driving high-speed ADCs. The dual-channel architecture simplifies board space for I/Q or differential applications. Consider the HI/LO gain mode selection based on the required dynamic range. Verify that the 5 V single-supply operation fits the system power budget and that the 100 MHz bandwidth meets the signal frequency requirements.

Part Context

The AD8332 belongs to the AD8331/AD8332/AD8334 family of ultralow noise VGAs. While the AD8331 is single-channel and the AD8334 is quad-channel, the AD8332 provides a dual-channel solution. All variants share similar internal architectures including the X-AMP technology and integrated LNA, differing primarily in channel count and package options.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.