TLC540I Datasheet, PDF (2/11 Pages) Texas Instruments – 8-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL AND 11 INPUTS

TLC540I, TLC541I
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL AND 11 INPUTS
SLAS065A – OCTOBER 1983 – REVISED MARCH 1995
The converters incorporated in the TLC540 and TLC541 feature differential high-impedance reference inputs
that facilitate ratiometric conversion, scaling, and analog circuitry isolation from logic and supply noises. A
switched-capacitor design allows low-error (± 0.5 LSB) conversion in 9 µs for the TLC540 and 17 µs for the
TLC541 over the full operating temperature range.
The TLC540I and TLC541I are characterized for operation from – 40°C to 85°C.The TLC541M is characterized
for operation from – 55°C to 125°C.
functional block diagram
REF+
14
REF–
13
1
A0 ₂
A1 ₃
Analog
Inputs
A2
A3
A4
A5
A6
A7
4
5
6
7
8
12-Channel
Analog
Multiplexer
A8
A9
9
11
4
A10 ¹²
Sample
and
Hold
Input
Address
Register
ADDRESS ¹⁷
INPUT
Self-Test
4
Reference
Input
2
Multiplexer
I/O ¹⁸
CLOCK
15
CS
SYSTEM 19
CLOCK
typical equivalent inputs
INPUT CIRCUIT IMPEDANCE DURING SAMPLING MODE
INPUT
A0 – A10
1 kΩ TYP
Ci = 60 pF TYP
(equivalent input
capacitance)
8-Bit
Analog-to-Digital
Converter
(Switched-Capacitors)
8
Output ₈
Data
Register
8-to-1 Data
Selector
and Driver
16 DATA
OUT
4
Control Logic
and I/O
Counters
INPUT CIRCUIT IMPEDANCE DURING HOLD MODE
INPUT
A0 – A10
5 MΩ TYP
2
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