AD8372ACPZ-R7

Overview

The AD8372ACPZ-R7 is a dual, digitally controlled variable gain amplifier (VGA) fabricated on a high-frequency BiCMOS process. It provides precise gain control with a 41 dB range and 1 dB step size via an 8-bit bidirectional SPI interface. The device features differential inputs and open-collector differential outputs, supporting a 150 Ω input impedance. Key electrical parameters include a 130 MHz -3 dB bandwidth, 7.8 dB noise figure at maximum gain, and a quiescent current of 106 mA per channel. It operates on a single 5 V supply within a temperature range of −40°C to +85°C.

Feature Summary

• Dual independent channels with digital gain control via serial interface
• Differential input and output architecture for improved distortion performance
• Pin-programmable output stage transconductance using external resistors
• Power-down feature preserving gain settings with low standby current

Applications

• Differential ADC drivers
• CMTS upstream direct sampling receivers
• CATV modem signal scaling
• Generic RF/IF gain stages
• Single-ended-to-differential conversion

Procurement Notes

Verify the specific ordering suffix R7 indicates tape and reel packaging when sourcing components. Confirm RoHS compliance status as indicated by the Z suffix in the part number. Ensure the supplier provides valid traceability documentation for the Analog Devices Inc. manufacturer. Check that the component matches the CP-32-7 package outline dimensions for proper PCB footprint integration.

Selection Notes

Select this component for applications requiring wide dynamic range and precise digital gain adjustment. The dual-channel design allows for synchronized processing in multi-path systems. Consider the open-collector output requirement for external biasing inductors and load resistors. Evaluate the thermal performance requirements given the exposed pad package and power dissipation characteristics under maximum gain conditions.

Part Context

This part belongs to the AD8372 series of programmable VGAs from Analog Devices. It is designed for multichannel receiver applications where high IP3 and low noise are critical. The device integrates a fixed gain transconductance amplifier with a digitally controlled attenuator and vernier. It serves as a key building block in front-end signal conditioning chains for communication systems.

Replacement Considerations

No public confirmed substitute part numbers are documented in the provided datasheet.