AD7894ARZ-3

Data Acquisition - Analog to Digital Converters (ADC)

The AD7894ARZ-3 is a ultra-low-power, 16-bit successive-approximation, analog-to-digital converter (ADC). The device supports a single-supply operation ranging from 2.7 V to 5.5 V, and offers up to 16 effective bits at excellent low-power levels. The low-power operation, precision performance, and ease of use make the AD7894ARZ-3 an ideal choice for a variety of applications that require high-precision analog-to-digital conversion.

Applications

The AD7894ARZ-3 is suitable for many applications, including but not limited to: medical sensor systems, portable device battery life extension, and industrial control/measurement and automation. The device is also used for many industrial and consumer applications including smart home solutions, energy management systems, and factory automation and monitoring systems.

In medical applications, the AD7894ARZ-3 is used to measure vital signs such as electrocardiogram (ECG) and pulse oximetry (SpO2) measurements. In battery life extension applications, it can be used to measure battery voltage status, power consumption, and temperature, providing powerful and accurate analog-to-digital conversion for battery life optimization in portable devices.

In industrial control/measurement and automation applications, the AD7894ARZ-3 can be used to accurately measure temperatures, pressures, and force, enabling precise and reliable control, monitoring, and automation of industrial equipment.

In energy management systems, the AD7894ARZ-3 is used to measure mains voltage, current, and power, providing real-time information about power distribution for energy efficient operation. In factory automation and monitoring systems, the device can be used to measure motion profiles and feedback signals to enable precise control of machines in the factory.

Working Principle

The AD7894ARZ-3 is a successive-approximation analog-to-digital converter. It consists of a high-speed DAC and an internal reference. It converts an analog input voltage to a 16-bit binary digital word. The AD7894ARZ-3 also benefits from a low-power architecture that allows a single-supply operation with a supply voltage ranging from 2.7 V to 5.5 V.

In operation, the input voltage is compared to an internal reference voltage generated by the internal 12-bit DAC. If the input voltage is higher than the reference voltage, the MSB of the DAC is set to “1”; if it is lower, the MSB is set to “0”. The same comparison is then made for the next most significant bit and so on until the input voltage is resolved to 16 bits.

The AD7894ARZ-3 has an internal clock generator, which can be configured to operate with or without external clock synchronization. It has an internal digital filter to remove clock noise and an internal sample-hold circuit to reduce thermal drift. It also features a Power Down Mode to reduce the power consumption when the device is idle.

Conclusion

The AD7894ARZ-3 is a ultra-low-power, 16-bit successive approximation, analog-to-digital converter suitable for a variety of applications. The device supports a single-supply operation ranging from 2.7 V to 5.5 V and offers up to 16 effective bits at excellent low-power levels. Its low-power operation, precision performance, and ease of use make it an ideal choice for a variety of precision analog-to-digital conversion applications.