SPI

Interface

Oscillator

Voltage

Reference

High Accuracy

Temp Sensor

MUX

PGA

16-bit

ADC

GND

2V

500

500

0.1 F

1 F

0.1 F

GND

1M

1M

GND

2V

500

500

1 F

0.1 F

GND

1M

GND

2V

0.1 F

0.1 F

GND

AIN0

AIN1

AIN2

AIN3

SCLK

CS

VDD

GND

DOUT/DRDY

DIN

ADS1118

1M

GND

GND

ADS1118

www.ti.com

SBAS457B – OCTOBER 2010 – REVISED AUGUST 2012

Ultra-Small, Low-Power, SPI™-Compatible, 16-Bit

Analog-to-Digital Converter and Temperature Sensor with Internal Reference

Check for Samples: ADS1118

1

FEATURES

DESCRIPTION

The

ADS1118

is

a

precision

analog-to-digital

23

•

Ultra-Small QFN Package:

converter (ADC) with 16 bits of resolution offered in

2mm × 1,5mm × 0,4mm

an ultra-small, leadless QFN-10 package or an

•

Wide Supply Range: 2.0V to 5.5V

MSOP-10 package. The ADS1118 is designed with

•

Low Current Consumption:

precision, power, and ease of implementation in

mind. The ADS1118 features an onboard reference

–

Continuous Mode: Only 150

μA

and oscillator. Data are transferred via a serial

–

Single-Shot Mode: Auto Shutdown

peripheral interface (SPI). The ADS1118 operates

•

Programmable Data Rate:

from a single power supply ranging from 2V to 5.5V.

8SPS to 860SPS

The ADS1118 can perform conversions at rates up to

•

Single-Cycle Settling

860

samples

per

second

(SPS).

An

onboard

programmable gain amplifier (PGA) is available on

•

Internal Low-Drift Voltage Reference

the ADS1118 that offers input ranges from the supply

•

Internal Temperature Sensor:

to as low as ±256mV. This range allows both large

–

0.5°C Max Error

and

small

signals

to

be

measured

with

high

•

Internal Oscillator

resolution. The ADS1118 also features an input

multiplexer (MUX) that provides two differential or

•

Internal PGA

four single-ended inputs. The ADS1118 can also

•

Four Single-Ended or Two Differential Inputs

function as a high-accuracy temperature sensor. This

temperature sensor can be used for system-level

APPLICATIONS

temperature monitoring or cold junction compensation

for thermocouples.

•

Temperature Measurement:

The

ADS1118

operates

either

in

continuous

–

Thermocouple Measurement

conversion

mode

or

a

single-shot

mode

that

–

Cold Junction Compensation

automatically

powers

down

after

a

conversion.

–

Thermistor Measurement

Single-shot

mode

significantly

reduces

current

•

Portable Instrumentation

consumption during idle periods. The ADS1118 is

specified from –40°C to +125°C.

•

Factory Automation and Process Controls

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.

2

SPI is a trademark of Motorola.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2010–2012, 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.