TLC545I Datasheet | Texas Instruments

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 patible 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 m W TL546 2.7 µs 17 µs 40 x 103 15 m W 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 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...