TMPE627 User Manual Issue 1.0.2
Page 17 of 34
ADC Input Schemes
Single-Ended with Ground Reference
Differential with Ground Reference
Vm
Vin
VIN+
VIN-
AGND
Vm
Vin
VIN+
VIN-
AGND
Table 4-14: ADC Input Schemes
If signals without a ground reference should be connected, use the single-ended input scheme or connect
VIN+ and VIN- to AGND with a resistor to prevent the signal source to float out of the ADC’s common-mode
range. In most cases the VIN- connection suffices.
Single-Ended without Ground Reference
Differential without Ground Reference
Vm
Vin
VIN+
VIN-
AGND
Vm
Vin
VIN+
VIN-
AGND
Table 4-15: ADC Input Schemes
Unused ADC channels should be connected to AGND.
