The AD7818 and AD7817 are 10-bit, single- and 4-channel
A/D converters with on-chip temperature sensor that can operate
from a single 2.7 V to 5.5 V power supply. Each part contains
a 9 μs successive-approximation converter based around
a capacitor DAC, an on-chip temperature sensor with an accuracy
of
2°C, an on-chip clock oscillator, inherent track-andhold
functionality and an on-chip reference (2.5 V). The
AD7816 is a temperature monitoring only device in a SOIC/
MSOP package.
The on-chip temperature sensor of the AD7817 and AD7818
can be accessed via Channel 0. When Channel 0 is selected and
a conversion is initiated, the resulting ADC code at the end of
the conversion gives a measurement of the ambient temperature
with a resolution of
0.25°C. See Temperature Measurement
section of this data sheet.