Maximum Throughput . . . 175/360 KSPS

INL/DNL: ±1 LSB Max, SINAD: 72 dB,

SFDR: 85 dB, fi = 20 kHz

SPI/DSP-Compatible Serial Interface

Single 5-V Supply

Rail-to-Rail Analog Input With 500 kHz BW

Three Options Available:

– TLC2551: Single Channel Input

– TLC2552: Dual Channels With

Autosweep

– TLC2555: Single Channel With

Pseudo-Differential Input

Low Power With Autopower Down

– Operating Current: 3.5 mA

Autopower Down: 8 μA

Small 8-Pin MSOP and SOIC Packages

description

The TLC2551, TLC2552, and TLC2555 are a family of high performance, 12-bit, low-power, miniature, CMOS

analog-to-digital converters (ADC). The TLC255x family uses a 5-V supply. Devices are available with single,

dual, or single pseudo-differential inputs. Each device has a chip select (CS), serial clock (SCLK), and serial

data output (SDO) that provides a direct 3-wire interface to the serial port of most popular host microprocessors

(SPI interface). When interfaced with a TMS320 DSP, a frame sync signal (FS) can be used to indicate the

start of a serial data frame on CS for all devices or on FS for the TLC2551.

The TLC2551, TLC2552, and TLC2555 are designed to operate with very low power consumption. The power

saving feature is further enhanced with an autopower-down mode. This product family features a high-speed

serial link to modern host processors with SCLK up to 20 MHz. The maximum SCLK frequency is dependent

upon the mode of operation (see Table 1). The TLC255x family uses SCLK as the conversion clock, which

provides synchronous operation and a minimum conversion time of 1.5 μs using a 20-MHz SCLK.