AD7657BSTZ-REEL

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Data Acquisition - Analog to Digital Converters (ADC)

The AD7657BSTZ-REEL is suitable for applications that need high resolution, low power and small size. It provides 12-bit precision and 8-channel multiplexer input with low power consumption, only 0.9mA. The device's supply voltage ranges from 2.7V to 5.5V, and its SPI interface can take up to 50MHz clock.

AD7657BSTZ-REEL Typical Applications

The AD7657BSTZ-REEL is used in several different kinds of applications. In medical instruments, the chip is often used to measure the patient’s vital signs, such as ECG, NIBP and health monitoring signals. Additional applications include credit card readers, point of sale terminals, gaming machines, fiberoptic systems and aerospace systems.

AD7657BSTZ-REEL’s Working Principle

AD7657BSTZ-REEL is a CMOS signal conditioning analog-to-digital conversion chip which convert continuous voltage or current signals from the transducer or sensor into 12-bits digital numbers.

AD7657BSTZ-REEL consists of a sample-and-hold circuit, a comparator, a digital-to-analog converter and a reference voltage source. The sample-and-hold circuit samples the analog signal from the transducer or sensor, and then passes it to the comparator. The comparator compares the analog signal with the analog voltage output of the digital-to-analog converter, produces a digital code equivalent that is proportional to the analog signal. The digital-to-analog converter is supplied with the reference voltage, and the reference voltage is also supplied to the comparator. The reference voltage is used to set the resolution of the system.

Conclusion

The AD7657BSTZ-REEL is a 12-bit analog-to-digital conversion IC that provides high resolution, low power, and small size for many different kinds of measurement applications across a wide range of industries. Its working principle involves sampling an analog signal from a transducer or sensor, comparing it to a reference voltage supplied to a digital-to-analog converter in order to generate a digital code equivalent.

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