AD7293BCPZ

ADCs/DACs - Special Purpose Overview

The AD7293BCPZ is a 12-bit power amplifier current controller integrating ADC, DACs, and temperature/current sensors. It features four closed-loop PA drain current controllers, four 12-bit SAR ADC inputs (±0.5 LSB INL), eight 12-bit DACs (four bipolar, four unipolar), and four high-side current sense amplifiers with ±0.1% gain error. The device includes internal and external temperature sensors with ±1.25°C accuracy. Powered by 4.5 V to 5.5 V analog supplies, it supports SPI interfaces with VDRIVE levels of 1.8 V, 3 V, or 5 V. Packaged in a 56-lead LFCSP, it operates from −40°C to +125°C.

ADCs/DACs - Special Purpose Feature Summary

• Four independent closed-loop power amplifier drain current controllers
• Eight 12-bit DACs: four bipolar (−5 V to +5 V) and four unipolar (0 V to 10 V)
• Four high-side current sense amplifiers with adjustable gain up to 100
• Integrated 2.5 V precision reference and ±1.25°C accurate internal temperature sensor

ADCs/DACs - Special Purpose Applications

• GaN and GaAs power amplifier monitoring and controls
• Base station power amplifier biasing and protection
• General-purpose system monitoring and controls

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix against the manufacturer's ordering guide to confirm package type and reel specifications. Confirm that AVDD and DACVDD-BI are connected to the same potential during implementation. Ensure the design accommodates the required supply voltages, including AVSS at −5 V for standard operation.

ADCs/DACs - Special Purpose Selection Notes

Select this component when integrated closed-loop current control and multi-channel monitoring are required for power amplifiers. Verify that the input voltage ranges for the ADC and current sense amplifiers match the system requirements. Check compatibility with depletion or enhancement mode power amplifiers based on the application needs.

ADCs/DACs - Special Purpose Part Context

The AD7293 belongs to Analog Devices' specialized data acquisition family designed for RF power management. It consolidates functions typically requiring multiple discrete components into a single chip, reducing board space and complexity in base station transmitter designs.

ADCs/DACs - Special Purpose Replacement Considerations

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