How do I interface to multiple AD719x ADCs over the same serial interface ?
AD7194
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The AD7194 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (S-?) analog...
Datasheet
AD7194 on Analog.com
AD7192
Production
The AD7192 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (S-?) analog...
Datasheet
AD7192 on Analog.com
AD7195
Recommended for New Designs
The AD7195 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (S-?) analog...
Datasheet
AD7195 on Analog.com
AD7190
Production
The AD7190 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (S-?) analog...
Datasheet
AD7190 on Analog.com
AD7191
Production
The AD7191 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (S-?) ADC...
Datasheet
AD7191 on Analog.com
AD7193
Production
The AD7193 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (S-?) analog...
Datasheet
AD7193 on Analog.com
How do I interface to multiple AD719x ADCs over the same serial interface ?
A single microcontroller can be used to communicate with several AD719x devices. The input of the ADC can be used to enable or disable the serial interface of the ADC. By controlling the inputs to the ADCs using a decoder, the microcontroller can communicate with each ADC individually or simultaneously. The figure below shows the interface between a microprocessor and several ADCs. The input of each ADC is connected to the decoder. Using the decoder, the microprocessor can select the ADC with which it wants to transfer data/instructions. When is high, the serial interface of the ADC is disabled and it ignores any activity on the data bus. To communicate with the ADC, its line can be taken low. The ADC will then have access to the data bus between itself and the microprocessor. The datasheet should be consulted for timing specifications.
A single microcontroller can be used to communicate with several AD719x devices. The input of the ADC can be used to enable or disable the serial interface of the ADC. By controlling the inputs to the ADCs using a decoder, the microcontroller can communicate with each ADC individually or simultaneously. The figure below shows the interface between a microprocessor and several ADCs. The input of each ADC is connected to the decoder. Using the decoder, the microprocessor can select the ADC with which it wants to transfer data/instructions. When is high, the serial interface of the ADC is disabled and it ignores any activity on the data bus. To communicate with the ADC, its line can be taken low. The ADC will then have access to the data bus between itself and the microprocessor. The datasheet should be consulted for timing specifications.