Datasheet

www.ti.com
Start Clock
Turn off clock
Convert Battery Input
2
Store Battery Input 2
in BAT2 Register
Set /DAV = 0
Power up ADC
Power Down
Reference
Is Data
Averaging
Done
N
Y
Power Down ADC
DONE
Host Writes A/D
Converter Control
Register
Power Up Reference
(Including Delay)
OPERATION - AUXILIARY MEASUREMENT
TSC2301
SLAS371D – SEPTEMBER 2002 – REVISED AUGUST 2004
Battery Input 2
Figure 66. V
BAT2
Measurement Process
The two auxiliary voltage inputs can be measured in similar fashion to the battery inputs, with no voltage dividers.
The input range of the auxiliary inputs is 0 V to V
REF
. Figure 67 and Figure 68 illustrate the process. Applications
for this feature may include external temperature sensing, ambient light monitoring for controlling an LCD
back-light, or sensing the current drawn from the battery.
58