AD8335ACPZ-REEL

Overview

The AD8335ACPZ-REEL is a quad variable gain amplifier (VGA) with integrated low noise preamplifiers, designed for cost and power-sensitive applications. It features fully differential signal paths, active input matching, and individual gain controls per channel. The device offers user-selectable maximum gains of 46 dB or 38 dB via the HLxx pins. Operating from a single 5 V supply, it consumes 95 mW per channel with preamps enabled, or 65 mW with preamps disabled. The component is housed in a 64-lead lead frame chip scale package rated for the industrial temperature range of −40°C to +85°C.

Feature Summary

• Low noise preamplifier with 1.3 nV/√Hz typical voltage noise and 7 dB noise figure at 50 Ω source impedance
• Accurate linear-in-dB gain control with 8 dB output gain steps across selectable high and low gain modes
• Excellent overload recovery performance with 10 ns recovery time for both preamplifier and VGA stages
• Power-down capability allowing preamplifiers to be shut down independently to reduce total power consumption

Applications

• Medical imaging systems including ultrasound and gamma cameras
• Sonar signal processing chains
• Test and measurement instrumentation requiring precise wideband gain control

Procurement Notes

Verify the specific reel packaging suffix against the manufacturer's current ordering guide to ensure compatibility with automated assembly equipment. Confirm that the exposed paddle on the LFCSP package is correctly soldered to the PCB ground plane during manufacturing to maintain thermal dissipation and electrical integrity. Cross-reference the revision history to ensure the component matches the intended design specifications.

Selection Notes

Select this component when designing multi-channel signal paths requiring simultaneous low noise amplification and precise variable gain control. The device is suitable for applications demanding high linearity and fast overload recovery. Consider the power consumption trade-offs between enabling and disabling the internal preamplifiers based on system noise requirements and thermal constraints.

Part Context

This part belongs to the Analog Devices AD8335 family of quad variable gain amplifiers. It is specifically engineered for medical and industrial applications where multiple channels must process signals with consistent gain accuracy and low noise figures. The device integrates both the front-end preamplification and the variable gain stage into a single compact package.

Replacement Considerations

Consult the official Analog Devices ordering guide for confirmed substitute part numbers within the same product family. Verify pinout compatibility and electrical specifications before substituting any alternative components.