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TLV1544IDR Datasheet(PDF) 1 Page - Texas Instruments |
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TLV1544IDR Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 41 page  TLV1544C, TLV1544I, TLV1548C, TLV1548I, TLV1548M LOW-VOLTAGE 10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL AND 4/8 ANALOG INPUTS SLAS139C – DECEMBER 1996 – REVISED JANUARY 1999 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Conversion Time ≤ 10 µs D 10-Bit-Resolution ADC D Programmable Power-Down Mode ...1 µA D Wide Range Single-Supply Operation of 2.7 V dc to 5.5 V dc D Analog Input Range of 0 V to VCC D Built-in Analog Multiplexer with 8 Analog Input Channels D TMS320 DSP and Microprocessor SPI and QSPI Compatible Serial Interfaces D End-of-Conversion (EOC) Flag D Inherent Sample-and-Hold Function D Built-In Self-Test Modes D Programmable Power and Conversion Rate D Asynchronous Start of Conversion for Extended Sampling D Hardware I/O Clock Phase Adjust Input description The TLV1544 and TLV1548 are CMOS 10-bit switched-capacitor successive-approximation (SAR) analog-to-digital (A/D) converters. Each device has a chip select (CS), input-output clock (I/O CLK), data input (DATA IN) and serial data output (DATA OUT) that provide a direct 4-wire synchronous serial peripheral interface (SPI ™, QSPI ™) port of a host microprocessor. When interfacing with a TMS320 DSP, an additional frame sync signal (FS) indicates the start of a serial data frame. The devices allow high-speed data transfers from the host. The INV CLK input provides further timing flexibility for the serial interface. In addition to a high-speed converter and versatile control capability, the device has an on-chip 11-channel multiplexer that can select any one of eight analog inputs or any one of three internal self-test voltages. The sample-and-hold function is automatic except for the extended sampling cycle, where the sampling cycle is started by the falling edge of asynchronous CSTART. At the end of the A/D conversion, the end-of-conversion (EOC) output goes high to indicate that the conversion is complete. The TLV1544 and TLV1548 are designed to operate with a wide range of supply voltages with very low power consumption. The power saving feature is further enhanced with a software-programmed power-down mode and conversion rate. The converter incorporated in the device features differential high-impedance reference inputs that facilitate ratiometric conversion, scaling, and isolation of analog circuitry from logic and supply noise. A switched-capacitor design allows low-error conversion over the full operating temperature range. SPI and QSPI are registered trademarks of Motorola, Inc. 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 A0 A1 A2 A3 A4 A5 A6 A7 CSTART GND VCC EOC I/O CLK DATA IN DATA OUT CS REF+ REF– FS INV CLK DB OR J PACKAGE (TOP VIEW) 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 DATA OUT DATA IN I/O CLK EOC VCC A0 A1 A2 CS REF+ REF– FS INV CLK GND CSTART A3 D OR PW PACKAGE (TOP VIEW) 19 20 1 32 17 18 16 15 14 13 12 11 9 10 5 4 6 7 8 I/O CLK DATA IN DATA OUT CS REF+ A3 A4 A5 A6 A7 FK PACKAGE (TOP VIEW) 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. Copyright © 1999, Texas Instruments Incorporated |
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