TLC3541, TLC3545

SLAS345 − DECEMBER 2001

5V, LOW POWER, 14BIT, 200KSPS

SERIAL ANALOGTODIGITAL CONVERTERS WITH AUTOPOWER DOWN

1

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FEATURES

D 200-KSPS Sampling Rate

D Built-In Conversion Clock

D INL: ±1 LSB Max

DNL:

±1 LSB Max

D SINAD = 81.5 dB, SFDR = 95 dB

THD = 94 dB at 15 kHz fin, 200 KSPS

D SPI/DSP-Compatible Serial Interfaces With

SCLK Input up to 15 MHz

D Single 5-V Supply

D Rail-to-Rail Analog Input With 500 kHz BW

D Two Input Options Available:

− TLC3541 − Single Channel Input

− TLC3545 − Single Channel,

Pseudo-Differential Input

D (TLC3541) Optimized DSP Interface −

Requires FS Input Only

D Low Power With Auto-Power Down

− Operating Current: 3.5 mA

− Auto-Powerdown Current: 5

µA

D Pin Compatible 12-/14-/16-Bit Family in 8-Pin

SOIC and MSOP Packages

APPLICATIONS

D ATE System

D Industrial Process Control

D Measurement

D Motor Control

DESCRIPTION

The TLC3541 and TLC3545 are a family of high

performance, 14-bit, low power, miniature CMOS

analog-to-digital converters (ADCs). These devices

operate from a single 5-V supply. Devices are available

with single, dual, or single pseudo-differential inputs. All

of these devices have 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 DSP, a frame sync signal (FS) is used to indicate

the start of a serial data frame on either pin 1 (CS) or pin

7 (FS) for the TLC3541. The TLC3545 ADC connects

to the DSP via pin 1 only (CS).

The TLC3541 and TLC3545 are designed to operate

with low power consumption. The power saving feature

is further enhanced with an auto-power down mode.

This product family features a high-speed serial link to

modern host processors with an external SCLK up to

15 MHz. Both families use a built-in oscillator as the

conversion clock, providing a 2.67

µs maximum

conversion time.

SDO

FS

VDD

SCLK

8

7

6

5

1

2

3

4

CS

REF

GND

AIN

TLC3541

D OR DGK Package

(TOP VIEW)

SDO

SCLK

VDD

AIN(−)

8

7

6

5

1

2

3

4

CS

REF

GND

AIN(+)

TLC3545

D OR DGK 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

 2001, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.