Intel 8253 - Page 253

Typical Applications (Continued)
Directly Converting a Low-Level Signal
DS005671-59
V
REF
/2
=
256 mV
A µP Interfaced Comparator
DS005671-60
For:
V
IN
(+)
>
V
IN
(−)
Output
=
FF
HEX
For:
V
IN
(+)
<
V
IN
(−)
Output
=
00
HEX
1 mV Resolution with µP Controlled Range
DS005671-61
V
REF
/2
=
128 mV
1 LSB
=
1mV
V
DAC
≤V
IN
≤(V
DAC
+256 mV)
0 ≤ V
DAC
<
2.5V
ADC0801/ADC0802/ADC0803/ADC0804/ADC0805
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