SNAD02C
8-CHANNEL 10-BIT ADC
4. BLOCK DIAGRAM
VRH
CH0/DI0
CH1/DI1
CH2/DI2
CH3/DI3
CH4/DI4
CH5/DI5
CH6/DI6
CH7(BAT)/DI7
AVDD
1.2V Bandgap
Reference
8-Channels
Analog/Digital
Input MUX
VDD
D
12 Bit SAR
ADC
Serial
Interface
and
Control
Logic
START
CLK
DIO
AVSS
VSSD
Figure-1 Block diagram of ADC
5. PIN ASSIGNMENTS
Pin Name
CH[7] ~ CH[0]
REF
VDD
VSS
AVDD
AVSS
START
CLK
DIO
I/O
Description
I Analog input / digital input
I Reference voltage of analog signal
I Positive power
I Negative power
I Positive power of analog circuit
I Negative power of analog circuit
I Command initialization signal (from host controller)
I Clock of data communication and AD conversion (from
host controller)
IO Data input and output of data communication
Table-1
Version: 1.3
4
July 31, 2003