ADAU1978WBCPZ-RL

Series:	Automotive
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	ADC
Number of Channels:	4
Resolution (Bits):	24 b
Sampling Rate (Per Second):	192k
Data Interface:	I²C, SPI
Voltage Supply Source:	Single Supply
Voltage - Supply:	3.3V
Operating Temperature:	-40°C ~ 105°C
Mounting Type:	Surface Mount
Package / Case:	40-WFQFN Exposed Pad, CSP
Supplier Device Package:	40-LFCSP-WQ (6x6)
Base Part Number:	ADAU1978

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ADAU1978WBCPZ-RL Application Field and Working Principle

Introduction

The ADAU1978WBCPZ-RL is a multi-channel, low power analog to digital converter (ADC) from Analog Devices, Inc. This ADC is designed for applications such as medical, automotive, and industrial. The ADAU1978WBCPZ-RL operates with a single 3.3 volt power supply, and provides improved dynamic performance and 8-bit resolution. The integrated products are housed in a 16-lead, 7mm × 7mm, LFCSP package.

Application Field

The ADAU1978WBCPZ-RL is conceptually suited for multi-channel electronics applications, analog sensor or temperature-sensing applications, motors, valve actuators and switched-mode power supplies. The ADC provides high data throughput while consuming low power and can convert signals with a resolution of 8 bits and a sampling frequency of up to 20 Hz. The conversion time is independent of the sampling frequency, and data can be transferred to the serial port of a microcontroller for further processing. The design of the device takes into account the measurement accuracy and system stability, which is especially important for temperature sensing applications. The low power consumption of the device translates into a long battery life in portable medical and automotive applications.The features of the device are well suited for industrial applications, such as smart metering and instrumentation systems where fast, accurate, and reliable readings are required.

Working Principle

The ADAU1978WBCPZ-RL contains two independent channels for data acquisition, each of which includes its own multiplexer and a low noise 8-bit ADC conversion block. The multiplexer allows the ADC to sample up to four independent signals. The signals can be single-ended or differential. The ADC gains or attenuates the signal before it is converted to the digital output represented by an 8-bit value. The fully differential signal path eliminates common-mode errors and reduces or eliminates the need for a DC bias voltage. The programmable gain feature allows the user to select the best amplitude range for the incoming signals. The flexibility of the programmable gain allows the user to interface a wide range of signal sources. The digital output of the ADC is then converted to a corresponding analog voltage. The data output is synchronized to the rising edge of the serial clock. The serial data is sent out of the device on the falling edge of the clock. The digital output is formatted in 8-bit, 2’s complement binary format.

Conclusion

The ADAU1978WBCPZ-RL is a low power, 8-bit ADC from Analog Devices, Inc. designed for wide range of electronics applications. The device features a programmable gain multiplexer and a low noise ADC conversion block which is suitable for single-ended or differential signal conversion. The ADC produces an 8-bit digital output which is synchronized to the rising edge of the serial clock and data is sent out on the falling edge of the clock. This device is ideal for industrial and automotive applications where fast, accurate and reliable measurements are essential.

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