AD5647RBCPZ-R2

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Data Acquisition – Digital to Analog Converters (DAC) involves the conversion of digital information into analog voltage or current. The AD5647RBCPZ-R2 is a general-purpose ultra-small, low power, two-channel, 12-bit, parallel-load digital-to-analog converter (DAC) with unbuffered voltage output. This device has an output code selection option, also called a gain selection option, which allows a variety of custom user codes.

Features of the AD5647RBCPZ-R2

The AD5647RBCPZ-R2 has a wide range of features, including:

• Two channels of 12-bit data
• Low voltage operation: 2.7 V to 5.5 V
• Guaranteed 12-bit accuracy
• Improved AC specifications
• CS pin can be used to reset the DAC
• Reset time is 2 μs max
• SPI-compatible serial interface
• Fast settling time 10 μs typ
• Output offset currents 0 μA typ
• Low power dissipation 6 mW typ
• Small 3 mm × 3 mm, 0.4 mm pitch TDFN package
• Automatic shutdown mode
• Voltage references 0.4 – 5 V

Applications of the AD5647RBCPZ-R2

The AD5647RBCPZ-R2 is well-suited for a variety of applications, such as:

• Industrial process control
• Instrumentation systems
• Data acquisition systems
• Automatic test equipment
• Power management systems
• Photovoltaic systems
• Automotive systems
• Lighting control
• Avionics

Working Principle of the AD5647RBCPZ-R2

The AD5647RBCPZ-R2 works by taking a 16-bit parallel digital data word and converting it into a corresponding 12-bit analog voltage within an accuracy of 12-bits (better than 1/4 LSB), with a precision reference voltage generator. The digital data is sent over the parallel data interface which feeds into an input shift register. The 12-bit data then passes through an internal DAC converter and is converted into a corresponding analog voltage, which can then be connected to the device output.

The output of the device is dependent on the input gain (the reference) and the digital data. The device can operate in either “Unipolar” or “Bipolar” modes and the corresponding output voltage can range from 0 volts to the reference voltage or from -Vref to Vref. The output settling time is 10 μs typical.

The CS pin can be used to reset the DAC output voltage back to its default state, 0 volts. This pin can also be configured to automatically enter low power mode when the CS pin is inactive. By activating the DSP bit, the offset of the digital-to-analog converter is actively compensated for improved accuracy.

Summary

The AD5647RBCPZ-R2 is a two-channel, 12-bit, parallel-load digital-to-analog converter with unbuffered voltage output. Its features include guaranteed 12-bit accuracy, low voltage operation, reset time of 2 μs, SPI-compatible serial interface, fast settling time of 10 μs, and low power dissipation. The AD5647RBCPZ-R2 is well-suited for a variety of applications, such as industrial process control, instrumentation systems, data acquisition systems, and automatic test equipment. Its working principle involves taking a 16-bit parallel digital data word and converting it into a corresponding 12-bit analog voltage within an accuracy of 12-bits with a precision reference voltage generator.

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