TLC3574, TLC3578, TLC2574, TLC2578

5V ANALOG, 3/5V DIGITAL, 14/12BIT, 200KSPS, 4/8CHANNEL

SERIAL ANALOGTODIGITAL CONVERTERS WITH ±10V INPUTS

SLAS262C − OCTOBER 2000 − REVISED MAY 2003

2

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description (continued)

In addition to being a high-speed ADC with versatile control capability, these devices have an on-chip analog

multiplexer (MUX) that can select any analog input or one of three self-test voltages. The sample-and-hold

function is automatically started after the fourth SCLK (normal sampling) or can be controlled by a special pin,

CSTART, to extend the sampling period (extended sampling). The normal sampling period can also be

programmed as short sampling (12 SCLKs) or long sampling (44 SCLKs) to accommodate the faster SCLK

operation popular among high-performance signal processors. The TLC3574/78 and TLC2574/78 are

designed to operate with low-power consumption. The power saving feature is further enhanced with

autopower-down mode and programmable conversion speeds. The conversion clock (internal OSC) is built in.

The converter can also use an external SCLK as the conversion clock for maximum flexibility. The TLC3574/78

and TLC2574/78 are specified with bipolar input and a full scale range of

±10 V.

AVAILABLE OPTIONS

PACKAGED DEVICES

TA

20-TSSOP

(PW)

20-SOIC

(DW)

20-PDIP

(N)

24-SOIC

(DW)

24-TSSOP

(PW)

−40

°C to 85°C

TLC2574IPW

TLC2574IDW

TLC2574IN

TLC2578IDW

TLC2578IPW

−40

°C to 85°C

TLC3574IPW

TLC3574IDW

TLC3574IN

TLC3578IDW

TLC3578IPW

functional block diagram

Analog

MUX

Signal

Scaling

Command

Decode

CMR (4 MSBs)

SAR

ADC

OSC

Conversion

Clock

FIFO

X8

Control

Logic

4-Bit

Counter

SDO

EOC/INT

DVDD AVDD

DGND AGND

CSTART

FS

CS

SCLK

SDI

CFR

REFM

COMP

REFP

X8†

A0

A1

A2

A3

A4

A5

A6

A7

X4‡

A0

A1

A2

A3

X

X

X

X

† TLC3578, TLC2578

‡ TLC3574, TLC2574

NOTE: 4-Bit counter counts the CLOCK, SCLK. The CLOCK is gated in by CS falling edge if CS initiates the conversion operation cycle, or gated

in by the rising edge of FS if FS initiates the operation cycle. SCLK is disabled for serial interface when CS is high.