AD7293

RECOMMENDED FOR NEW DESIGNS

12-Bit Power Amplifier Current Controller with ADC, DACs, Temperature and Current Sensors

Analog Devices AD7293 Product Info

10 February 2026 4

Features

4 closed-loop power amplifier (PA) drain current controllers
Built-in PA protection, sequencing, and alert features
Compatible with both depletion mode and enhancement mode power amplifiers
Highly integrated
- 4 uncommitted 12-bit analog-to-digital converter (ADC) inputs
  - ±0.5 LSB typical integral nonlinearity (INL)
- Eight 12-bit voltage digital-to-analog converters (DACs)
  - 1.3 μs maximum settling
- 4 high-side current sense amplifiers, ±0.1% gain error
- 2 external temperature sensor inputs, ±1.1°C accuracy
- Internal temperature sensor, ±1.25°C accuracy
- 2.5 V on-chip reference
Flexible monitoring and control ranges
- ADC input ranges: 0 V to 1.25 V, 0 V to 2.5 V, and 0 V to 5 V
- Bipolar DAC ranges: 0 V to +5 V, −4 V to +1 V, and −5 V to 0 V
- Bipolar DAC reset and clamping relative to V_CLAMPx voltage
- Unipolar DAC ranges: 0 V to 5 V, 2.5 V to 7.5 V, and 5 V to 10 V
- Current sense gain: 6.25, 12.5, 25, 50, 100, and more
- Adjustable closed-loop setpoint ramp time

High-side voltage current sensing
- 4 current sense inputs
  - 4 V to AV_SS + 60 V, ±200 mV input range
Small package and flexible interface
- Serial port interface (SPI) with VDRIVE supporting 1.8 V, 3 V, and 5 V interfaces
- 56-lead LFCSP
Temperature range: −40°C to +125°C

Part details & applications

The AD7293 is a PA drain current controller containing functionality for general-purpose monitoring and control of current, voltage, and temperature, integrated into a single chip solution with an SPI-compatible interface.

The device features a 4-channel, 12-bit successive approximation register (SAR) ADC, eight 12-bit DACs (four bipolar and four unipolar with output ranges that can be configured to shut down under external pin control), a ±1.25°C accurate internal temperature sensor, and eight general-purpose input/output (GPIO) pins.

The device also includes limit registers for alert functions and four high-side current sense amplifiers to measure current across external shunt resistors. These amplifiers can be optionally set to operate as part of four independent closed-loop drain current controllers.

A high accuracy 2.5 V internal reference is provided to drive the DACs and the ADC. The 12-bit ADC monitors and digitizes the internal temperature sensor, and two inputs are included for the external diode temperature sensors.

Product Highlights

Four independent closed-loop drain current controllers.
Built-in monitoring, sequencing, and alert features.
Compatible with both depletion mode and enhancement mode power amplifiers.

Applications

GaN and GaAs power amplifier monitoring and controls
Base station power amplifiers
General-purpose system monitoring and controls

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