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TLC2554 - SERIAL ANALOG-TO-DIGITAL CONVERTERS

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General Description

The TLC2558 and TLC2554 are a family of high-performance, 12-bit low power, 1.6 µs, CMOS analog-to-digital converters (ADC) which operate from a single 5 V power supply.

These devices have three digital inputs and a 3-state output [chip select (CS), serial input-output clock (SCLK), serial data input (SDI), and serial data output (SDO)] that provide a direct 4-wire interface to the serial port of most popular host microprocessors (SPI interface).

When interfaced with a DSP, a frame sync (FS) signal is used to indicate the start of a serial data frame.

Overview

TLC2554, TLC2558 5-V, 12-BIT, 400 KSPS, 4/8 CHANNEL, LOW POWER, SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTO POWER DOWN SLAS220A –JUNE 1999 D Maximum Throughput 400 KSPS D Built-In Reference and 8× FIFO D Differential/Integral Nonlinearity Error: ±1 LSB D Signal-to-Noise and Distortion Ratio: 69 dB, fi = 12 kHz D Spurious Free Dynamic Range: 75 dB, fi = 12 kHz D SPI/DSP-Compatible Serial Interfaces With SCLK up to 20 MHz D Single Supply 5 Vdc D Analog Input Range 0 V to Supply Voltage With 500 kHz BW D Hardware Controlled and Programmable Sampling Period D Low Operating Current (4 mA at 5.5 V External Ref, 6 mA at 5.

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