8-Bit D to A/A to D Converter
D.A/A-D CONVERTER
zN425E 2il425J
FEATURES
O Type
: Monolithic, containr D-A with counter and reference
O Accuracy
:...
Description
D.A/A-D CONVERTER
zN425E 2il425J
FEATURES
O Type
: Monolithic, containr D-A with counter and reference
O Accuracy
: O.2YoFSR at 25'C (+* tSB linearity)
o Operating Ranges
: O'C to 70'C (ZN425E) -55'C to +125'C (ZN425J)
O Gompatibility
: TTL and CMOS
O Powor Supply O Settling Time (D-A)
: Single *5V : 1 pstyp.
O ConversionTime(A-D) : l mstyp., uring ramp ond comparo
O Extra Gomponentr Required
D-A
: Reference capacitor (dircct voltago output through 1Oko typ.)
A-D
: Comparator, gate, clock rnd reference capacitor
16 LeadD.l.L.
DESCRIPTION
The ZN425E (or ZN425J) is a monolithic S.l.G. 8-bit digital to analogue convortor containing an R-2Rladder network of diffused resistors with precision bipolar rwltchos, and in addition a countor and a 2.5V precision voltag€ roference. The counter ir I powerful addition which allows a precision staircase to be generated y6ry rimply merely by clocking tho count€r.
vnEr
Output
cv 8itI B i t7 8 i r6 B i r5
5elect ( H ' g hl o . C o u ^ l e r )
Clock
or I BrtBinarycounter or
F i g .1 - B l o c k D i a g r a m
zN425ElZN425J
INTRODUCTION TheZN425E(orZN425J)is an 8-bit dualmodedigitalto analogue/analogutoedigitalconverterl.t containsanB-bitD to A converteur singanadvanced esignof R-2Rladdernetworkandanarrayof precisionbipolarswitchesplusan 8-bit binarycounteranda 2.5volt precisionvoltagerelerenceall on a singlemonolithicchip.
Thespeciadl esignof laddernetworkresultsin full 8-bit accuracyusingnormadl iffusedresistors. The use...
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