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ADS1232
ADS1234
SBAS350–JUNE2005
deviceinformation(持续)
PINDESCRIPTIONS
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nameads1232ads1234input/outputdescription
dvdd11digitaldigitalpowersupply:2.7vto5.3v
DGND22DigitalDigitalGround
xtal1/externalclockinput:typically4.9152mhz.tieslowtoactivateinternaloscillator.canalsouse
33digital/digitalinput
clkinexternalcrystaloscillatoracrossxtal1/clkinandxtal2pins.seetextformoredetails.
xtal244digitalexternalclockoutputpin.seetextformoredetails.
DGND55DigitalDigitalGround
DGND66DigitalDigitalGround
TEMP7–DigitalInputOnboardTemperatureDiodeEnableInputpin
a1–7digitalinputinputmuxselectinputpin(msb)
a088digitalinputinputmuxselectinputpin(lsb):
A1A0Channel
00AIN1
01AIN2
10AIN3
11AIN4
CAP99AnalogGainAmpBypassCapacitorConnection
CAP1010AnalogGainAmpBypassCapacitorConnection
AINP11111DigitalInputPositiveAnalogInputChannel1
AINN11212DigitalInputNegativeAnalogInputChannel1
AINP3–13DigitalInputPositiveAnalogInputChannel3
AINN3–14DigitalInputNegativeAnalogInputChannel3
AINN4–15DigitalInputNegativeAnalogInputChannel4
AINP4–16DigitalInputPositiveAnalogInputChannel4
AINN21317DigitalInputNegativeAnalogInputChannel2
AINP21418DigitalInputPositiveAnalogInputChannel2
REFN1519DigitalInputNegativeReferenceInputpin
REFP1620DigitalInputPositiveReferenceInputpin
AGND1721AnalogAnalogGround
avdd1822analoganalogpowersupply,2.7vto5.3v
gain01923digitalinputgainselectinputpin(lsb)
gain12024digitalinputgainselectinputpin(msb):
GAIN1GAIN0PGA
001
012
1064
11128
speed2125digitalinputoutputdatarateselectinputpin:
SPEEDDATARATE
010Hz
180Hz
powerdowninputpin:holdingthispinlowpowersdowntheentireconverterandresetsthea/d
PDWN2226DigitalInput
转换器.
serialclockinputpin:clockoutdataontherisingedge.usedtoinitiateoffsetcalibrationand
SCLK2327DigitalInput
sleepmodes.seetextformoredetails.
drdy/
2428digitalinputdual-purposeoutput:
DOUT
dataready:indicatesvaliddatabygoinglow.
dataoutput:outputsdata,msbfirst,onthefirstrisingedgeofsclk.
6
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