TC3403_05 Datasheet, PDF (9/16 Pages) Microchip Technology – +1.8V Low Power, Quad Input, 16-Bit Sigma-Delta A/D Converter with a Power Fault Monitor and Microprocessor Reset Circuit

FIGURE 3-5:
A/D OPERATIONAL FLOWCHART
POR
Sleep
SDAT = High
No
SCLK
Hgh to Low?
Yes
Power Up Analog,
Start CONVCLK (= 0),
Start Conversion,
Resolution = 2m
(m = 16), Latch Input
Channel Address (if applicable).
SCLK
Low to High ^No
transition?
Yes
SDAT = Low
CONVCLK
No
< 2⁹?
Yes
No
SCLK
High to Low?
Yes
No
A/D
Resolution
> 2¹⁰?
Yes
Reduce A/D
Resolution by 1-bit
(m = m – 1);
SDAT = High
TC3403
SDAT = Low
CONVCLK = 2m?
No
(Conversion Done?)
Yes
Power Down Analog,
Conversion Complete,
SDAT = High
SCLK
No
High to Low?
Yes
SDAT = Dm;
m=m–1
Yes
m ≥ 0?
No
SDAT = High
Internal Reset
Sleep
© 2005 Microchip Technology Inc.
DS21412C-page 9