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AIN

P

AIN

N

Low-Drift

Oscillator

Reference

MUX

Precision

Temperature

Sensor

AIN0/REFP1

AIN1

AIN2

AIN3/REFN1

SCLK

CS

AVDD

AVSS

DOUT/DRDY

DIN

ADS1120-Q1

DRDY

DGND

REFP0REFN0

Internal

Reference

CLK

50 A to

1.5 mA

MUX

DVDD

PGA

16-Bit

ûADC

Digital Filter

and

SPI

Interface

Product

Folder

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Now

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

ADS1120-Q1

SBAS683B–AUGUST2014–REVISEDMAY2020

ADS1120-Q1Automotive,4-Channel,2-kSPS,Low-Power,16-BitADC

WithIntegratedPGAandReference

1

1Features

1

•AEC-Q100qualifiedforautomotiveapplications

–Temperaturegrade1:–40°Cto+125°C,T

A

•FunctionalSafety-Capable

–Documentationavailabletoaidfunctional

safetysystemdesign

•Widesupplyrange:2.3Vto5.5V

•Programmablegain:1V/Vto128V/V

•Programmabledatarates:5SPSto2kSPS

•16-bit,noise-freeresolutionat20SPS

•Simultaneous50-Hzand60-Hzrejectionat

20SPSwithsingle-cyclesettlingdigitalfilter

•Twodifferentialorfoursingle-endedinputs

•Dual-matchedprogrammablecurrentsources:

50µAto1.5mA

•Internal2.048-Vreference:5ppm/°C(typ)drift

•Internal2%accurateoscillator

•Internaltemperaturesensor:

0.5°C(typ)accuracy

•SPI-compatibleinterface(mode1)

2Applications

•Temperaturesensors:

–Thermocouples

–Resistancetemperaturedetectors(RTDs):

2-,3-,or4-wiretypes

•Bridgesensors:

–Pressuresensors

–Straingauges

•Batteryvoltageandcurrentmeasurements

3Description

TheADS1120-Q1isaprecision,16-bit,analog-to-

digitalconverter(ADC)thatoffersmanyintegrated

featurestoreducesystemcostandcomponentcount

inapplicationsmeasuringsmallsensorsignals.The

devicefeaturestwodifferentialorfoursingle-ended

inputsthroughaflexibleinputmultiplexer(MUX),a

low-noise,programmablegainamplifier(PGA),two

programmableexcitationcurrentsources,avoltage

reference,anoscillator,alow-sideswitch,anda

precisiontemperaturesensor.

Thedevicecanperformconversionsatdataratesup

to2000samples-per-second(SPS)withsingle-cycle

settling.At20SPS,thedigitalfilteroffers

simultaneous50-Hzand60-Hzrejectionfornoisy

industrialapplications.TheinternalPGAoffersgains

upto128V/V.ThisPGAmakestheADS1120-Q1

ideally-suitedforapplicationsmeasuringsmallsensor

signals,suchasresistancetemperaturedetectors

(RTDs),thermocouples,thermistors,andbridge

sensors.Thedevicesupportsmeasurementsof

pseudo-orfully-differentialsignalswhenusingthe

PGA.Alternatively,thedevicecanbeconfiguredto

bypasstheinternalPGAwhilestillprovidinghigh

inputimpedanceandgainsupto4V/V,allowingfor

single-endedmeasurements.

Powerconsumptionisaslowas120µAwhen

operatinginduty-cyclemodewiththePGAdisabled.

Communicationtothedeviceisestablishedthrougha

mode1SPI-compatibleinterface.TheADS1120-Q1

isofferedinaTSSOP-16packageandisspecified

overatemperaturerangeof–40°Cto+125°C.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

ADS1120-Q1TSSOP(16)5.00mm×4.40mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

BlockDiagram

Product specificaties