Texas Instruments ADS1283 Bedienungsanleitung

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Control

CLK

AVDD

AVSS

DVDD

DGND

Overrange

ADS1283

DOUT

DIN

DRDY

SCLK

SYNC

RESET

PWDN

PGA

Mux

Input 1

Input 2

VREFN

VREFP

V

COM

CS

Programmable

Digital

Filter

Calibration

Serial

Interface

Control

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

ADS1283

SBAS565C–JANUARY2014–REVISEDAUGUST2019

ADS1283High-Resolution,Analog-to-DigitalConverter

1

1Features

1

•HighResolution:

–SNR:130dB(250SPS,PGA=1)

•HighAccuracy:

–THD:–122dB

•LowPowerConsumption:

–18mW(PGA=1,2,4,or8)

–ShutdownMode:10μW

•Low-NoisePGA:5nV/√Hz

•Two-ChannelInputMultiplexer

•Inherently-StableModulatorWithFastResponding

OverrangeDetector

•FlexibleDigitalFilter:

–Sinc+FIR+IIR(Selectable)

–LinearorMinimumPhaseResponse

–ProgrammableHigh-PassFilter

–SelectableFIRDataRates:

250SPSto4kSPS

•OffsetandGainCalibrationEngine

•SYNCInput

•AnalogSupply:5Vor±2.5V

•DigitalSupply:1.8Vto3.3V

2Applications

•EnergyExploration

•SeismicMonitoring

•High-AccuracyInstrumentation

SimplifiedSchematic

3Description

TheADS1283isanextremelyhigh-performance,

single-chip,analog-to-digitalconverter(ADC)withan

integrated,low-noiseprogrammablegainamplifier

(PGA)andtwo-channelinputmultiplexer(mux).The

ADS1283issuitableforthedemandingneedsof

seismicmonitoringequipment.

Theconverterusesafourth-order,inherentlystable,

delta-sigma(ΔΣ)modulatorthatprovidesoutstanding

noiseandlinearityperformance.Themodulatordigital

outputisdigitallyfilteredanddecimatedbytheon-

chipdigitalfiltertoyieldtheADCconversionresult.

Theflexibleinputmuxprovidesanadditionalexternal

inputformeasurement,aswellasinternalself-test

inputconnections.ThePGAfeaturesoutstandinglow

noise(5nV/√Hz)andvery-highinputimpedance,

allowingeasyinterfacingtogeophonesand

hydrophonesoverawiderangeofgains.

Thedigitalfilterprovidesselectabledataratesfrom

250to4000samplespersecond(SPS).Thehigh-

passfilter(HPF)featuresanadjustablecorner

frequency.On-chipgainandoffsetscalingregisters

supportsystemcalibration.

Thesynchronizationinput(SYNC)canbeusedto

synchronizetheconversionsofmultipleADS1283

devices.

TheADS1283isavailableinacompact24-lead,5-

mm×4-mmVQFNpackage,andisfullyspecified

from–40°Cto+85°C,withamaximumoperating

temperaturerangeof–50°Cto+125°C.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

ADS1283

VQFN(24)5.00mm×4.00mmADS1283A

ADS1283B

(1)Forallavailablepackages,seethepackageoptionaddendum

attheendofthedatasheet.

DeviceComparison

PARTNUMBEROFFSETOPTIONTHD(TYP)GAIN

ADS1283100mV–122dB1to64

ADS1283A100mV–118dB1,4,16

ADS1283B75mV,100mV–122dB1to64

Produktspezifikationen