AN4207

Overview of 16-bit SDADC

Doc ID 023945 Rev 1

7/28

Example:

For a 1.22V reference voltage and a gain set to 1, the input range is +/- 0.61V

The formula is:

Vin = SDADCx_AINyP - SDADCx_AINyM = ReadData * Vref/(2 x gain x 32767)

with ReadData is two’s complement read data from the SDADC data register

(SDADCx_JDATAR or SDADCx_RDATAR)

Figure 2.

Input signal range in differential mode

Figure 3 shows how to connect a bridge type sensor to the 16-bit SDADC.

As shown below both positive (SDADCx_AINyP) and negative (SDADCx_AINyM) inputs are

connected to sensor outputs.

SDADCx_AINyP - SDADCx_AINyM

+ Vref/(2xgain)

- Vref/(2xgain)

MSv31128V1