AD8332ARUZ-RL

Overview

The AD8332ARUZ-RL is a dual-channel, ultralow noise linear-in-dB variable gain amplifier (VGA) from Analog Devices. It integrates an ultralow noise preamplifier, an X-AMP VGA with 48 dB range, and a selectable postamplifier. The device operates on a single 5 V supply and features active input impedance matching. Key electrical parameters include a 100 MHz bandwidth, 650 V/µs slew rate, and 50 mV input offset voltage. It is housed in a TSSOP-28 package.

Feature Summary

• Integrates an ultralow noise preamplifier with low voltage and current noise specifications for high-fidelity signal acquisition.
• Features an X-AMP VGA providing a wide gain range with precise linear-in-dB scaling controlled by a single voltage input.
• Includes a selectable output clamping level to prevent overload conditions when driving subsequent analog-to-digital converters.

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 ordering suffix against the manufacturer's official documentation to confirm packaging type and reel specifications. Ensure compatibility with the required operating temperature range of -40°C to +85°C. Confirm that the TSSOP-28 package dimensions align with your PCB layout constraints before finalizing procurement.

Selection Notes

Select this component for applications requiring dual-channel amplification with ultralow noise characteristics. The device is optimized for driving high-speed ADCs and supports both LO and HI gain modes. Consider the power dissipation per channel and the need for external components for input impedance matching and output clamping when designing the circuit.

Part Context

The AD8332 is part of the AD8331/AD8332/AD8334 family of ultralow noise VGAs. While the AD8331 offers a single channel and the AD8334 provides four channels, the AD8332 specifically delivers dual-channel performance. This family shares common architectural features such as the X-AMP technology and integrated preamplifiers, tailored for different channel count requirements.

Replacement Considerations

The AD8331ARUZ-RL serves as a single-channel alternative within the same product family. Designers requiring quad-channel functionality may consider the AD8334 series. Verify pinout compatibility and thermal management requirements when substituting these parts.