Texas Instruments ADS131A04 Bedienungsanleitung

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SCLK

DOUT

DIN

Control and

Serial Interface

GND

AVSS

DRDY

AVDD

VNCP

XTAL1/CLKIN

CS

Negative

Charge

Pump

Voltage

Reference

ADS131A04 Only

Reference

Mux

REFEXT

IOVDD

CLK/XTAL

XTAL2

M[2:0]

RESET

DONE

'6 ADC

'6 ADC

'6 ADC

'6 ADC

AIN4N

AIN4P

AIN3N

AIN3P

AIN2N

AIN2P

AIN1N

AIN1P

REFNREFP

Out-of-Range

Detect

Data Integrity

Watchdog

Timer

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Folder

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

ADS131A02

,

ADS131A04

SBAS590E–MARCH2016–REVISEDJUNE2020

ADS131A0x2-or4-Channel,24-Bit,128-kSPS,Simultaneous-Sampling,Delta-SigmaADC

1

1Features

1

•2or4simultaneous-samplingdifferentialinputs

•Dataratesupto128kSPS

•Highperformance:

–Single-channelaccuracy:betterthan0.1%at

10,000:1dynamicrange

–Effectiveresolution:20.6bitsat8kSPS

–THD:–100dBat50Hzand60Hz

•Integratednegativechargepumpallowsabsolute

inputvoltagesbelowground

•Flexibleanalogpower-supplyoperation:

–Usingnegativechargepump:3.0Vto3.45V

–Unipolarsupply:3.3Vto5.5V

–Bipolarsupply:±2.5V

•Digitalsupply:1.65Vto3.6V

•Low-driftinternalvoltagereference:6ppm/°C

•ADCselfchecks

•Cyclicredundancycheck(CRC)andhamming

codeerrorcorrectiononcommunications

•MultipleSPIdatainterfacemodes:

–Asynchronousinterrupt

–Synchronousmasterandslave

•Package:32-pinTQFP

•Operatingtemperaturerange:

–40°Cto+125°C

2Applications

•Electricitymeters:commercialandresidential

•Circuitbreakers

•Batterytestequipment

•Batterymanagementsystems

•Dataacquisitionsystems

3Description

TheADS131A02andADS131A04devicesaretwo-

andfour-channel,simultaneous-sampling,24-bit,

delta-sigma(ΔΣ),analog-to-digitalconverters(ADCs).

Thewidedynamicrange,withscalabledataratesup

to128kSPS,andinternalfaultmonitorsmakethe

ADS131A02orADS131A04agoodchoicewhen

designingforenergymonitoring,gridprotection,and

controlapplications.TheADCinputscanbe

independentlyanddirectlyinterfacedtoaresistor-

dividernetwork,acurrenttransformer,oraRogowski

coiltomeasurevoltageorcurrent.Flexiblepower-

supplyoptions,includinganinternalnegativecharge

pump,areavailabletomaximizetheeffective

resolutionforhighdynamicrangeapplications.

Asynchronousandsynchronousmasterandslave

interfaceoptionsareavailable,providingADC

configurationflexibilitywhenchainingmultipledevices

inasinglesystem.Severalinterfacechecks,ADC

startupchecks,anddataintegritycheckscanbe

enabledontheinterfacetoreporterrorsintheADC

andduringdatatransfer.

Thecompleteanalogfront-end(AFE)solutionsare

packagedina32-pinTQFPpackageandare

specifiedovertheindustrialtemperaturerangeof

–40°Cto+125°C.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

ADS131A0xTQFP(32)5.00mm×5.00mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

SimplifiedBlockDiagram

Produktspezifikationen