ZN425J

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...