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 * 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 VCLAMPx 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 https://elecena.pl/product/17777596/12-bit-power-amplifier-current-controller-with-adc-dacs-temperature-and-current-sensors 2021-04-19 https://elecena.pl/product/17777596/12-bit-power-amplifier-current-controller-with-adc-dacs-temperature-and-current-sensors 2025-01-21