1

FEATURES

1

2

3

4

5

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7

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10

20

19

18

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16

15

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12

11

AIN0

AIN1

AIN2

AIN3

AIN4

AIN5

AIN6

AIN7

AIN8

GND

VCC

INT/EOC

I/O CLOCK

DATA IN

DATA OUT

CS

REF +

REF −

AIN10

AIN9

(TOP VIEW)

PW AND DW PACKAGE

DESCRIPTION

SUPPORTS DEFENSE, AEROSPACE,

APPLICATIONS

TLV2556-EP

www.ti.com ................................................................................................................................................... SLAS598A – NOVEMBER 2008 – REVISED JULY 2009

12-BIT 200-KSPS 11-CHANNEL LOW-POWER SERIAL ANALOG-TO-DIGITAL CONVERTER

WITH INTERNAL REFERENCE

• 12-Bit-Resolution Analog-to-Digital Converter

(ADC)

• Up to 200-KSPS (150-KSPS for 3 V)

Throughput Bit With 12-Output Mode Over

Operating Temperature Range

• 11 Analog Input Channels

• 3 Built-In Self-Test Modes

• Programmable Reference (2.048 V/4.096 V

Internal or External)

• Inherent Sample and Hold Function

• Linearity Error...±1 LSB Max

• On-Chip Conversion Clock

• Programmable Conversion Status Output: INT

or EOC

The

TLV2556

is

a

12-bit,

switched-capacitor,

• Unipolar or Bipolar Output Operation

successive-approximation, analog-to-digital converter

• Programmable MSB or LSB First

(ADC). The ADC has three control inputs [chip select

• Programmable Power Down

(CS), the input-output clock, and the address/control

input (DATAIN)], designed for communication with the

• Programmable Output Data Length

serial port of a host processor or peripheral through a

• SPI Compatible Serial Interface With I/O Clock

serial 3-state output.

Frequencies up to 15 MHz (CPOL = 0,

In addition to the high-speed converter and versatile

CPHA = 0)

control

capability,

the

device

has

an

on-chip

14-channel multiplexer that can select any one of 11

inputs or any one of three internal self-test voltages

AND MEDICAL APPLICATIONS

using configuration register 1. The sample-and-hold

• Controlled Baseline

function is automatic. At the end of conversion, when

• One Assembly/Test Site

programmed as EOC, the pin 19 output goes high to

indicate that conversion is complete. If pin 19 is

• One Fabrication Site

programmed as INT, the signal goes low when the

• Available in Military (–55°C/125°C)

conversion is complete. The converter incorporated in

Temperature Range(1)

the

device

features

differential,

high-impedance

• Extended Product Life Cycle

reference inputs that facilitate ratiometric conversion,

• Extended Product-Change Notification

scaling, and isolation of analog circuitry from logic

and supply noise. A switched-capacitor design allows

• Product Traceability

low-error

conversion

over

the

full

operating

temperature range. An internal reference is available

and

its

voltage

level

is

programmable

via

• Industrial Process Control

configuration register 2 (CFGR2).

• Portable Data Logging

• Battery Powered Instruments

• Automotive

(1)

Additional temperature ranges are available - contact factory

1

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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008–2009, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.