CONVERTERS. TLC546I Datasheet

TLC546I Datasheet PDF


Part

TLC546I

Description

8-BIT ANALOG-TO-DIGITAL CONVERTERS

Manufacture

etcTI

Page 15 Pages
Datasheet
Download TLC546I Datasheet


TLC546I Datasheet
D 8-Bit Resolution A/D Converter
D Microprocessor Peripheral or Stand-Alone
Operation
D On-Chip 20-Channel Analog Multiplexer
D Built-in Self-Test Mode
D Software-Controllable Sample and Hold
D Total Unadjusted Error . . . ± 0.5 LSB Max
D Timing and Control Signals Compatible
With 8-Bit TLC540 and 10-Bit TLC1540 A/D
Converter Families
D CMOS Technology
PARAMETER
Channel Acquisition Time
Conversion Time (Max)
Sampling Rate (Max)
Power Dissipation (Max)
TL545
1.5 µs
9 µs
76 x 103
15 mW
TL546
2.7 µs
17 µs
40 x 103
15 mW
TLC545C, TLC545I, TLC546C, TLC546I
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL AND 19 INPUTS
SLAS066B – DECEMBER 1985 – REVISED OCTOBER 1996
N PACKAGE
(TOP VIEW)
INPUT A0
INPUT A1
INPUT A2
INPUT A3
INPUT A4
INPUT A5
INPUT A6
INPUT A7
INPUT A8
INPUT A9
INPUT A10
INPUT A11
INPUT A12
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 VCC
27 SYSTEM CLOCK
26 I/O CLOCK
25 ADDRESS INPUT
24 DATA OUT
23 CS
22 REF +
21 REF –
20 INPUT A18
19 INPUT A17
18 INPUT A16
17 INPUT A15
16 INPUT A14
15 INPUT A13
description
The TLC545 and TLC546 are CMOS
analog-to-digital converters built around an 8-bit
switched capacitor successive-approximation
analog-to-digital converter. They are designed for
serial interface to a microprocessor or peripheral
via a 3-state output with up to four control inputs
including independent SYSTEM CLOCK, I/O
CLOCK, chip select (CS), and ADDRESS INPUT.
A 4-MHz system clock for the TLC545 and a
2.1-MHz system clock for the TLC546 with a
design that includes simultaneous read/write
operation allowing high-speed data transfers and
sample rates of up to 76,923 samples per second
for the TLC545, and 40,000 samples per second
for the TLC546.
In addition to the high-speed converter and
versatile control logic, there is an on-chip
20-channel analog multiplexer that can be used to
sample any one of 19 inputs or an internal self-test
voltage, and a sample-and-hold that can operate
automatically or under microprocessor control.
INPUT A4
INPUT A5
INPUT A6
INPUT A7
INPUT A8
INPUT A9
INPUT A10
FN PACKAGE
(TOP VIEW)
4 3 2 1 28 27 26
5 25
6 24
7 23
8 22
9 21
10 20
11 19
12 13 14 15 16 17 18
ADDRESS INPUT
DATA OUT
CS
REF +
REF –
INPUT A18
INPUT A17
The converters incorporated in the TLC545 and TLC546 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 (± 0.5 LSB) conversion in 9 µs for the TLC545, and 17 µs for the
TLC546, over the full operating temperature range.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1996, Texas Instruments Incorporated
1

TLC546I Datasheet
TLC545C, TLC545I, TLC546C, TLC546I
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL AND 19 INPUTS
SLAS066B – DECEMBER 1985 – REVISED OCTOBER 1996
TA
0°C to 70°C
– 40°C to 85°C
AVAILABLE OPTIONS
PACKAGE
CHIP CARRIER
(FN)
PLASTIC DIP
(N)
TLC545CFN
TLC545CN
TLC545IFN
TLC546IFN
TLC545IN
TLC546IN
description (continued)
The TLC545C and the TLC546C are characterized for operation from 0°C to 70°C. The TLC545I and the
TLC546I are characterized for operation from – 40°C to 85°C.
functional block diagram
INPUTS
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
1
2
3
4
5
6
7
8
9
10
11
12
13
15
16
17
18
19
20
20-Channel
Analog
Multiplexer
5
Sample
and
Hold
Input
Address
Register
ADDRESS
INPUT
25
Self-Test
Reference
5
Input
Multiplexer
REF +
22
REF –
21
8-Bit
Analog-to-Digital
Converter
(Switched-capacitors)
8
Output
Data
Register
8
8-to-1 Data
Selector and
Driver
24 DATA
OUT
Control Logic
and I/O
2 Counters
4
I/O
CLOCK
CS
SYSTEM
CLOCK
26
23
27
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Features Datasheet pdf D 8-Bit Resolution A/D Converter D Micro processor Peripheral or Stand-Alone Ope ration D On-Chip 20-Channel Analog Mult iplexer D Built-in Self-Test Mode D Sof tware-Controllable Sample and Hold D To tal Unadjusted Error . . . ± 0.5 LSB M ax D Timing and Control Signals Compati ble With 8-Bit TLC540 and 10-Bit TLC154 0 A/D Converter Families D CMOS Technol ogy PARAMETER Channel Acquisition Time Conversion Time (Max) Sampling Rate (M ax) Power Dissipation (Max) TL545 1.5 µs 9 µs 76 x 103 15 mW TL546 2.7 µs 17 µs 40 x 103 15 mW TLC545C, TLC545 I, TLC546C, TLC546I 8-BIT ANALOG-TO-DIG ITAL CONVERTERS WITH SERIAL CONTROL AND 19 INPUTS SLAS066B – DECEMBER 1985 REVISED OCTOBER 1996 N PACKAGE (TOP VIEW) INPUT A0 INPUT A1 INPUT A2 INPUT A3 INPUT A4 INPUT A5 INPUT A6 INPUT A7 INPUT A8 INPUT A9 INPUT A10 INPUT A11 INPUT A12 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 VCC 27 SYSTEM CLOCK 26 I/O CLOCK 25 ADDRESS INPUT 24 DATA OUT 23 CS 22 REF + 21 REF – 20 INPUT A18 19 INPUT A17 18 INPUT A16 17 INPUT A15.
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