Data Sheet

NAU7802 24-bit ADC
Nuvoton Confidential - 23 - Revision 1.7
8.9 Temperature sensor
A matched pair of on-chip diodes provides temperature sensing capability. Temperature sensing is
selected by setting of the analog input multiplexer using the register control interface. A PGA gain of
2x or 1x is used for temperature sensing to prevent PGA clipping.
By measuring the difference in voltage of these diodes, temperature changes can be inferred from a
baseline temperature. Please refer to the specification items “Temperature sensor output” and
“Temperature sensor delta coefficient.”
Figure 8
AVDD
1X
8X
MUX
VIN1N
VIN1P
VIN2N
VIN2P
PGA
X2