www.德州仪器.com
DAC7634
SBAS134A–JULY2004–REVISEDAUGUST2004
PINDESCRIPTIONS
PINNAMEDESCRIPTIONPINNAMEDESCRIPTION
1NCNoconnection25V
CC
analog+5-vpowersupply
2NCNoconnection26V
CC
analog+5-vpowersupply
3SDISerialdatainput27AGNDAnalogground
4DGNDDigitalground28AGNDAnalogground
5CLKDataclockinput29V
SS
analog+5-vpowersupplyor0-vsinglesupply
6DGNDDigitalground30V
SS
analog+5-vpowersupplyor0-vsinglesupply
7ldacdacregisterloadcontrol,risingedgetriggered31v
输出
DDACDoutputvoltage
dacd'soutputamplifierinvertinginput.usedtoclose
8DGNDDigitalground32V
输出
DSense
feedbackloopatload.
9loaddacinputregisterloadcontrol,activelow33v
REF
LCDSenseDACCandDreferencelowsenseinput
10DGNDDigitalground34V
REF
LCDDACCandDreferencelowinput
11cschipselect,activelow35v
REF
HCDDACCandDreferencehighinput
12DGNDDigitalground36V
REF
HCDSenseDACCandDreferencehighsenseinput
13SDOSerialdataoutput37V
输出
CDACCoutputvoltage
dacc'soutputamplifierinvertinginput.usedtoclose
14DGNDDigitalground38V
输出
CSense
thefeedbackloopattheload.
resetselect.determinestheactionofrst.如果
高,arstcommonsetsthedacregistersto
15RSTSEL39V
输出
BDACBoutputvoltage
mid-规模(8000
H
).iflow,arstcommandsets
thedacregisterstozero(0000
H
).
dacb'soutputamplifierinvertinginput.usedtoclose
16DGNDDigitalground40V
输出
BSense
thefeedbackloopattheload.
重置,risingedgetriggered.dependingonthe
17rststateofrstsel,thedacregistersaresetto41v
REF
HABSenseDACAandBreferencehighsenseinput
eithermid-scaleorzero.
18DGNDDigitalground42V
REF
HABDACAandBreferencehighinput
19NCNoconnection43V
REF
LABDACAandBreferencelowinput
20NCNoconnection44V
REF
LABSenseDACAandBreferencelowsenseinput
21DGNDDigitalground45V
SS
analog–5-vpowersupplyor0-vsinglesupply
22DGNDDigitalground46AGNDAnalogground
23V
DD
digital5-vpowersupply47v
输出
ADACAoutputvoltage
daca'soutputamplifierinvertinginput.usedtoclose
24V
DD
digital5-vpowersupply48v
输出
ASense
thefeedbackloopattheload.
5
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