ADE7903ARWZ

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Data Acquisition - ADCs/DACs - Special Purpose

The ADE7903ARWZ is a special purpose analog-to-digital converter designed for the automotive environment. It provides precise power measurement through a calibrated current range of 4mA to 20mA. The ADE7903ARWZ features multiple digital outputs, 10-bit A/D converter, and integrated temperature sensor, making it a versatile solution for applications that require the measurement of temperature, current, and voltage.The ADE7903ARWZ is specifically designed to meet the high-pressure and high-temperature requirements of automotive applications. It operates over an extended temperature range of -40°C to +125°C, making it suitable for automotive, industrial, and aerospace applications. The device also offers a wide power supply range of 4V to 18V, allowing for flexibility in design. The ADE7903ARWZ is an integrated precision ADC system that provides a high-accuracy, low-power measurement solution. The device integrates multiple hardware components including a 10-bit voltage-to-digital converter, differential amplifier, multiplexer, programmable gain amplifier, and reference. This enables the device to measure a large range of input signals, from 0V to 18V and 4mA to 20mA. The AN4190 application note by Texas Instruments\' provides an example of how to evaluate the performance of the ADE7903ARWZ. This application note covers a simple circuit that allows the evaluation of various functions of the device. It also provides information on power-on-reset (POR) and conversion time, temperature measurement accuracy, and other performance parameters.The ADE7903ARWZ uses a 4-wire current sensing method to measure input current across a 100Ω Resistors. This enables the device to measure input current over a wide range. The device also includes a 10-bit voltage-to-digital converter, multiplexer and programmable gain amplifier, allowing for the measurement of input voltages between 0V and 18V and currents from 4mA to 20mA.The device is powered by a single power supply with a voltage range of 4V to 18V. When in sleep mode, the input current is reduced to a few µA. The device also features auto-zero and selectable current range for improved accuracy. The selectable current range can be set to 4mA or 20mA, and can be programmed with the ADE79xx registers.The ADE7903ARWZ features a calibration routine that allows the system to self-calibrate the DAC and ADC performance. Calibration is performed by setting the device to a predetermined set of register values, and then adjusting the register values to optimize performance. This provides improved accuracy and stability over the temperature range of operation.The ADE7903ARWZ also includes a 16-bit onboard temperature sensor. The temperature sensor measures temperatures between -40°C and +125°C, with a resolution of 0.5°C and an accuracy of ±1°C. The output data is available in either Kelvin or Celsius units. This temperature signal is used to adjust the reference supply of the ADC for improved accuracy.The ADE7903ARWZ is designed for automotive, industrial and aerospace applications as it meets both the extended temperature range and advanced feature requirements of these applications. The integrated temperature sensor, multiple digital outputs, 10-bit A/D converter, and programmable range make the device a versatile solution for accurate power measurements. The device is also designed for low power consumption, making it an ideal choice for applications where power efficiency is paramount. In summary, the ADE7903ARWZ is designed for the automotive environment, providing precise power measurement through a 4mA to 20mA calibrated current range. The device is also capable of measuring temperatures between -40°C and +125°C, with an accuracy of ±1°C. The integrated multiplexer, reference, and temperature sensor, and a wide power supply range make the device an ideal choice for automotive, industrial and aerospace applications.

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