Single-ended Mode

The figure below illustrates the AFE output code relative to an input voltage V_IN between 0V (Ground) and V_VREFP. The AFE is configured in Single-ended mode by connecting internally the negative differential input to V_VREFP/2. As the AFE continues to work internally in Differential mode, the offset is measured at V_VREFP/2. The offset at V_INP=0 can be computed using the transfer function and the corresponding E_G and E_O.

Figure 1. Gain and Offset Errors in Single-ended Mode

where:

Full-scale error E_FS=(E_FS+)-(E_FS-), unit is LSB code
Offset error E_O is the offset error measured for V_REFP/2= 0V
Gain error E_G=100 x E_FS/4096, unit in %

The error values in the tables below include the DAC, the sample-and-hold error as well as the PGA gain error.