Datasheet

TLC542C, TLC542I
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL AND 11 INPUTS
SLAS075C – FEBRUARY 1989 – REVISED JUNE 2001
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
functional block diagram
12-Channel
Analog
Multiplexer
Sample and
Hold
8-Bit
Analog-to-Digital
Converter
(Switched-Capacitors)
Self-Test
Reference
Output
Data
Register
8-to-1 Data
Selector and
Driver
Control Logic
and I/O
Counters
Input Address
Register
4
8
8
4
REF+ REF–
DATA
OUT
Analog
Inputs
I/O CLOCK
CS
EOC
Input
Multiplexer
4
2
ADDRESS
INPUT
typical equivalent inputs
INPUT CIRCUIT IMPEDANCE DURING SAMPLING MODE INPUT CIRCUIT IMPEDANCE DURING HOLD MODE
1 kΩ TYP
C
i
= 60 pF TYP
(equivalent input
capacitance)
5 MΩ TYP
INPUT
A0–A10
INPUT
A0–A10