User manual

MCP3423 Evaluation Board User’s Guide

FIGURE 1-15: Reading Conversion Results: Note that the Input = 0.996V is applied to CH1. The

reading indicates the measured value is 0.996 Volts.

5th Byte: Repeated Byte for Configuration byte

4th byte: Configuration Byte (note that RDYbit is “0”)

3rd byte: Data Byte

2nd byte: Data Byte

1st byte: Data Byte

Requesting

5 Bytes

Results:

Output code: F907 in hex ( = 63751 in decimal)

Output Voltage=

63751

15.625 μVLSB()

PGA

--------------------------------------------

× 0.996 Volts with PGA 1==

Reading Data

using a Read Command

Note that if the differential input voltage is negative (CH- > CH+), the MSB of the first byte will be "1". In this case, the

voltage is calculated after converting the output code to 2's complement and then multiply the LSB.

See Section 4.9 of the MCP3423 Data Sheet (DS22088) for more information.