Analog input specification¶

Attention

The single-ended analog input has an extended range of 104.7% (e.g. 0xFFF correspond to +5.235V).

The differential analog input has an extended range of 121.8% (e.g. 0xFFF correspond to Vdiff = +6.09V).

Differential¶

Symbol	Min.	typical	Max.	Description	Impact
V _diff	-5V		+5V	The input voltage between the positive and negative input pins.	Any voltage out of this range causes saturation to the min/max ADC value.
V _cm	-1V	+2.5V	+5V	The common mode voltage.	Any voltage out of this range causes saturation and inaccuracy in the measurements.
V _in,P	-15V		+15V	The tolerable voltage between the positive input pin and GND.	Any voltage out of this range damages the analog input’s circuitry.
V _in,N	-15V		+15V	The tolerable voltage between the negative input pin and GND.	Any voltage out of this range damages the analog input’s circuitry.
R _i		13.6kΩ		Internal input resistance
Error	-1%		+1%	The input voltage between the positive and negative input pins.

Note

$V_{diff} = V_{in,P} - V_{in,N} V_{cm} = \frac {V_{in,P} + V_{in,N}} {2}$

Symbol	Min.	typical	Max.	Description	Impact
V _in	0V		+5V	The input voltage between the input and GND.	Any voltage out of this range causes saturation to min/max ADC value.
V _in,lim	-0.5V		+6V	The tolerable input voltage between the input and GND.	Any voltage out of this range damages the analog input’s circuitry.
R _i		100kΩ		Internal input resistance
Error	-1%		+1%	Error in ticks