AD7293BCPZ

The AD7293BCPZ is a 12bit power amplifier current controller with ADC, DACs, temperature and current sensor in 56 pin LFCSP package. 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, 12bit SAR ADC, eight 12bit DACs, a ±1.25°C accurate internal temperature sensor and eight 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 2.5V internal reference is provided to drive the DACs and the ADC. The 12bit ADC monitors and digitizes the internal temperature sensor and two inputs are included for the external diode temperature sensors.

• 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
• ADC input ranges from 0V to 1.25V, 0V to 2.5V and 0V to 5V
• Bipolar DAC ranges from 0V to +5 V, -4V to +1V and -5V to 0V
• Bipolar DAC reset and clamping relative to VCLAMPx voltage
• Unipolar DAC ranges from 0V to 5V, 2.5V to 7.5V and 5V to 10V
• Current sense gain of 6.25, 12.5, 25, 50, 100
• Adjustable closed-loop setpoint ramp time
• Operating temperature range from -40°C to +125°C