Tlc1541

lcTLC1541 10-BIT ANALOG-TO-DIGITAL CONVERTER WITH SERIAL CONTROL AND 11 INPUTS
SLAS073C – DECEMBER 1995 – REVISED AUGUST 1996

D D D D D D D D

10-Bit Resolution A/D Converter Microprocessor Peripheral or Standalone Operation On-Chip 12-Channel Analog Multiplexer Built-In Self-Test Mode Software-Controllable Sample-and-Hold Function Total Unadjusted Error . . . ± 1 LSB Max Pinout and ControlSignals Compatible With TLC540 and TLC549 Families of 8-Bit A/D Converters CMOS Technology
PARAMETER Channel Acquisition Sample Time Conversion Time (Max) Samples Per Second (Max) Power Dissipation (Max) VALUE 5.5 µs 21 µs 32 × 103 6 mW

DW OR N PACKAGE (TOP VIEW)

INPUT A0 INPUT A1 INPUT A2 INPUT A3 INPUT A4 INPUT A5 INPUT A6 INPUT A7 INPUT A8 GND

1 2 3 4 5 6 7 8 9 10

20 19 18 17 1615 14 13 12 11

VCC SYSTEM CLOCK I/O CLOCK ADDRESS INPUT DATA OUT CS REF + REF – INPUT A10 INPUT A9

FN PACKAGE (TOP VIEW)

description
The TLC1541 is a CMOS A/D converter built around a 10-bit switched-capacitor successiveapproximation A/D converter. The device is designed for serial interface to a microprocessor or peripheral using a 3-state output with up to four control inputs (including independent SYSTEM CLOCK, I/O CLOCK, chip select [CS], and ADDRESS INPUT ). A 2.1-MHz system clock for the TLC1541, with a design that includes simultaneous read/write operation, allows highspeed data transfers and sample rates up to 32 258 samples per second. In addition to the high-speed converter and versatile control logic, there is an on-chip, 12-channel analog multiplexer that can be usedto sample any one of 11 inputs or an internal self-test voltage and a sample-andhold function that operates automatically.

INPUT A3 INPUT A4 INPUT A5 INPUT A6 INPUT A7

4 5 6 7 8

3 2 1 20 19 18 17 16 15 14 9 10 11 12 13

INPUT A2 INPUT A1 INPUT A0 VCC SYSTEM CLOCK I/O CLOCK ADDRESS INPUT DATA OUT CS REF +
PACKAGE PLASTIC CHIP CARRIER (FN) TLC1541CFN TLC1541IFN PLASTIC DIP (N) TLC1541CNTLC1541IN
Copyright © 1996, Texas Instruments Incorporated

AVAILABLE OPTIONS SMALL OUTLINE (DW) TLC1541CDW TLC1541IDW

TA

0°C to 70°C – 40°C to 85°C

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.

PRODUCTIONDATA 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

INPUT A8 GND INPUT A9 INPUT A10 REF–

1

TLC1541 10-BIT ANALOG-TO-DIGITAL CONVERTER WITH SERIAL CONTROL AND 11 INPUTSSLAS073C – DECEMBER 1995 – REVISED AUGUST 1996

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. TheTLC1541 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
REF+ 14 1 2 3 4 5 6 7 8 9 11 12 REF– 13

Sample and Hold

10-Bit Switched-Capacitors Analog-to-Digital Converter 10 Output Data Register 10-to-1 Data Selector and DriverANALOG INPUTS

12-Channel Analog Multiplexer

10

16

4

Input Address Register

DATA OUT

4 4 Self-Test Reference ADDRESS INPUT 17 Input Multiplexer 2 Control Logic and I/O Counters

I/O CLOCK CS SYSTEM CLOCK

18 15 19

typical equivalent inputs
INPUT CIRCUIT IMPEDANCE DURING SAMPLING MODE 1 kΩ TYP INPUT A0 – A10 Ci = 60 pF TYP (equivalent input capacitance) INPUT CIRCUIT...