AD7845BQ

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The AD7845BQ is a multi-channel analog-to-digital converter (ADC) and digital-to-analog converter (DAC) from Analog Devices, Inc. The AD7845BQ is a 16-bit, maximum 14-ms conversion time, single-chip solution for accurate analog signal acquisition and manipulation. The AD7845BQ is well suited for applications in the industrial and automotive sectors such as automotive instrumentation, programmable logic controllers (PLCs), safety, control and data acquisition systems.

AD7845BQ is designed to provide improved accuracy, conversion speed, and resolution compared to more traditional analog-to-digital and digital-to-analog converters. With the ability to go from 1 to 14-ms conversion rate and improve the sampling speed, the AD7845BQ can provide a reliable solution to perform sensitive analog signal instrumentation in various industrial, automotive and/or research applications.

Application field: The versatile AD7845BQ converter can be applied in a wide range of applications such as, for example:

• Industrial process automation with PID controllers
• Automotive instrumentation, such as speedometers and tachometers
• Data acquisition, such as temperature and pressure sensors
• Servo control and robotics
• Measurement of electrical signals in industrial, automotive, and other environments
• Instrumentation and control systems design

Working principle: The AD7845BQ is a 16-bit, single-chip converter, allowing bidirectional conversion between analog and digital signals. It provides an input range of 0-5 V for both analog-to-digital and digital-to-analog conversions. The AD7845BQ features a built-in dual-channel Multiplexer (MUX) and a Programmable-gain Amplifier (PGA). Its 14-ms maximum conversion time ensures high speed operation over its wide input ranges, and its 5-bit input selector allows selection of the desired analogue input. The digital-to-analog circuitry features a built-in current-to-voltage amplifier with programmable gain.

The AD7845BQ has a built-in 4-bit digital offset adjustment, allowing the user to fine-tune the gain of the converter. Additionally, the AD7845BQ features a single-ended and differential input with reference buffer and line float, allowing it to be used in applications that require both AC and DC coupling. The AD7845BQ can provide single-ended or differential outputs, with either 16- or 12-bit resolution.

The AD7845BQ also features an on-board power-on-reset (POR), as well as a wide range of selectable power options, from 2.7 V to 5.5 V. Additionally, the AD7845BQ includes on-board voltage reference, temperature sensor, and comparator, providing fast and reliable performance across a wide temperature range. The AD7845BQ is available in a variety of packages, including QFN-16 and TSSOP-16.

The AD7845BQ is an excellent choice for digital-to-analog and analog-to-digital conversion in a wide variety of industrial and automotive applications. Its high speed and accuracy make it an ideal choice for applications where accuracy and speed are necessary. With its wide input range, single-ended and differential outputs, and optional power supply, the AD7845BQ is an excellent choice for industrial and automotive applications where speed, accuracy, and reliability are necessary.

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