AD7191 datasheet(9/20 Pages) AD

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AD7191

Rev. A | Page 9 of 20

Pin No.

Mnemonic

Description

AVDD

Analog Supply Voltage, 3 V to 5.25 V. AVDD is independent of DVDD. Therefore, DVDD can be operated at 3 V

with AVDD at 5 V or vice versa.

DVDD

Digital Supply Voltage, 2.7 V to 5.25 V. DVDD is independent of AVDD. Therefore, AVDD can be operated at 3 V

with DVDD at 5 V or vice versa.

ODR1

Output Data Rate, Digital Input Pin. This pin is used with ODR2 to select the output data rate. See Table 5.

DOUT/RDY

Serial Data Output/Data Ready Output. DOUT/RDYserves a dual purpose. It functions as a serial data

output pin to access the data conversions from the ADC. In addition, DOUT/RDYoperates as a data ready

pin, going low to indicate the completion of a conversion. If the data is not read after the conversion, the

pin goes high before the next update occurs. The serial interface is reset each time that a conversion is

available. The DOUT/RDY falling edge can be used as an interrupt to a processor, indicating that valid data

is available. With an external serial clock, the data can be read using the DOUT/RDY pin. Data is placed on

the DOUT/RDY pin on the SCLK falling edge and is valid on the SCLK rising edge.

ODR2

Output Data Rate, Digital Input Pin. This pin is used with ODR1 to select the output data rate. See Table 5.

AD7191 Datasheet(PDF) 9 Page - Analog Devices