Datasheet

TLC1541
10-BIT ANALOG-TO-DIGITAL CONVERTER
WITH SERIAL CONTROL AND 11 INPUTS
SLAS073C – DECEMBER 1995 – REVISED AUGUST 1996
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
description (continued)
The converters incorporated in the TLC1541 feature differential high-impedance reference inputs that facilitate
ratiometric conversion, scaling, and analog circuitry isolation from logic and supply noises. A totally
switched-capacitor design allows low-error conversion in 21 µs over the full operating temperature range.
The TLC1541 is available in DW, FN, and N packages. The C-suffix versions are characterized for operation
from 0°C to 70°C. The I-suffix versions are characterized for operation from –40°C to 85°C.
functional block diagram
12-Channel
Analog
Multiplexer
Sample and
Hold
10-Bit
Switched-Capacitors
Analog-to-Digital
Converter
Self-Test
Reference
Output
Data
Register
10-to-1 Data
Selector and
Driver
Control Logic
and I/O
Counters
Input
Multiplexer
Input Address
Register
2
4
4
10
10
4
REF+ REF–
DATA
OUT
ANALOG
INPUTS
ADDRESS
INPUT
I/O CLOCK
SYSTEM
CLOCK
CS
1
2
3
4
5
6
7
8
9
11
12
14 13
16
17
18
15
19
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