UPC624

UPC624 NEC | Alldatasheet

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Technical content

. 8-BIT HIGH-SPEED NEC Electronics Inc. MULTIPLYING D/A CONVERTER nnn Description Pin Configuration The wPC624 1s a monolithic multiplying digital-to-analog converter designed for high speed performance and THRESHOLD CI ~D come design/application flexibility. Advanced circuit design com SE vane) allows settling time of 85 ns. The outputs are high imped- vy Os 9 «4D vari ance dual complementary current types. which allow wr Ce foo sp simple resistive loading, op-amp voltage conversion, use a s g 2D ise and other configurations. The adjustable threshold logic nd: % m input allows connection to all popular logic families. we +P sm Features pixar

1 Wide range multiplying capability

5 Wide power supply range =5 V to +18 V Pin identification

= High output impedance and compliance Pin Nome Function Z Variable logic threshold Thawte = ferashold Contret 5 Direct intertace to TTL. CMOS, PMOS tana Cant Differential current outputs 2 lout Currant Output

5 Pin to pin compatibie with PMI'S DAC-08 3 V- Pawar Supply Negative

Ordering Information 7 MSE hw bat Operating oor Part Temperature i Mumber Package Range 1 ae Date Bit 3 wPC624c Plastic O1P —20°C to -70°C 8 ain Date Bud wrcgeac Pate OP wPC6240 Ceramic O1P 20°C to —80°C 8 Sth Data Bit S wecgeeo Seem Pee 10 6th Oats Ot 6 Absolute Maximum Ratings 11 7th Daw bn? = 25° a Tas esee Tt Dan we “Supp vege BE Power Supply Positive CMa tnpote E8B r= Positive Reference Voltage Lopic Thresnoté Control Voltage v~ WV atin Rare Vora VERS Tagatie Reterence Wotge “Haatag Careamt Outputs A Campensation ‘hep Compensation Roterance inputs Vv wr Oornv—vmn""""“ _Reterance tapi Reference input Oitterantia! Voltage OV _Retorance apt Oerentt Wee Reterance Input Curreat 5.0 mA Powar Dissipation. D or C Package 500 aw Operating Temperature Range. D Packege —20 te +80°C Operating Temperature Range. C Package 20 te -70°C Biorage Temperature Range. D Package =55 we ~180°C Storage Temporoture Range. C Package —55 te + 125°C Comment: Stress above those listed under “Absolute Maximum Rat- ings” may cause permanent Gamage to the device This 1s a stress rating only and functional operation of the device at these or any other : conaitions above those indicated in the operational sections of this, | Specification is not imped Exposure to absolute maximum rating conditions for extendeo periods may atlect device reliability

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Electrical Characteristics

Ta = 725°C, V= = 215 V. tree = 20mA Limits Test Porameter Symbol Min Typ. Max. Unit Conditions Aasatstion ‘ 8 D au ‘Mosetosicity ‘ ‘ ’ m7 Woalinearity cy 0.19 WER ‘Settling Time 1s Ly 150 ee Hh LSB. A, S50 0 All bits ON/OFF fall a Temporature 10 0 pense Oetpat Vattage Compliance Vor =10 EST ee Full Scale Symmetry tes — ts =o 80 uA Tere Scate Ottaet Current is 02 20 uA 0 20 4200 mk VO = BONO 18 Low Loval input Voltage Yiu o8 ¥ Wc = OV. Bi “OFF Wipe Level Input Voltage Vin 20 VY Wc Ov. Bi “ON Low Lovel Input Current He =20 10 wk p= OV. y= TOV 08 - Wigh Lovet Input Current WH 0.002 TO WA MC HOV. y = 20 VIO BY Logic Input Swing Vis =10 Tan Logic Taresnoié Range Vie -10 —135 Vv WK = We 13 ¥ Relerence Bias Current Ih- =3 wk Raterence Input Siew Rate Dingr/ot 40 80 wA/ps Ager S 200 0. Cr = 0 9F Power Supply Voltage SVAR~ V 0.0003 0.01 ‘NFSR/ Royection Ratio VT HOS te TEV Ine = Tm eV = 4S to 18 Vinee = Tk Power Supply Current I~ 25 ae ma aa aan mye c eee lidvgpeten

Basic Positive Reference Operation Basic Negative Reterence Operation or g o ° | weage oones ™ , J . Lt J J > > s 1 rT t ovate O Ty i nome | Aone i yt 1 | i ' 1 | ' ' : 2 o \\ w Poy Ly | Cyt j Noten > Brags = Ronee : 2 C= 00" pF (Starcerc vave:

3 Minimum capacitor vawe for staple operator 1s giver Dy

Co = Aree ik: x 1510 Basic Unipolar Negative Operation [i oe mos T vo — — 9 iapet toima) tp ima) Vol¥) Vo lv) r_] no set oe) a ee 7 neg porrar1e 1.084 0.008 0.82 0.04 eo} eyo] © oye ° b 1oooo001 1.008 = 0.084 5.04 4.92 q ciuooeogy yo oem see 482 4 4 4 4 ° 109000000 1.000 «0.992 6.00 4.06 Orreyrdad 0.992 1.000 4b —$.00 oooooo0) 0.008 1904 0.04 $92 ocooooood 0.000 1.092 6.00 0.965 wares

• NEC uPC624 a Typical Applications (Cont.) Basic Bipolar Output Operation mom he hs 2 s Inge = 2.000 mA 10.0000 recon apt igima) iptma) ¥otv) Vol" 'o TTT Te se _—— ow ttt 1992 0.000 9982 +1000 A | 4 Poe 1oo00001 1.008 0984 008 +016 10000000 1.000 0.992 000) =6+0.08 6 $ 6 OQrrsrrds 0.992 1.000 0.08 0.00 oooooon! 0.008 1904 092 oa ian ooooooo0 0.000 1992 10.00 —9.92 bame Positive Low Impedance Output Operation Negative Low impedance Output Operation ov mh Ass ? er 1m ise or 008 | F ft itt were TTL =" — —

Typical Applications (Cont.) Comparator Connection Method for A/D Conversion Comparator Connection Method for A/D Conversion (Positive Analog input) (Negative Analog Input) ve =v v Ym atv “sv 9 9 Te use ° ° fs ) m ose a 2 ° r) Pest .— f [eb Les 1) cm ° ee oe & 9 ° - e7 | 4 ‘) | us | | 4 Bru il gg | wcczee | Corrs Low Impedance Output Operation (Both Outputs) wv | j om age ° ) Sn Sa \\ ! gam on =) | wed (te a a + | Note: For butler ampiiier high slew rate OD-amp 1s recommenced to oDtain fast seming ume eam ) 6

Interfacing with Various Logic Families Anti-temperature coefticient circults The logic threshold 1s set about 1.4 V above Vic. This enables TTL level acceptance by simply grounding pin CMOS HNL. NMOS ecu Mos HNK (15V) 1. By placing an appropriate voltage at the logic aw threshold control pin (pin 1), various threshold values ov are available for the other logic families. on TTLintertace permission gives the interval logic thresh- old —4 mv/°C temperature coefficient. Vin = Vic + 1.4 V — 0.004 V X (Ta — 25°C). ascma scm Ke o 200 tok 3m on on Lt | sv sence

(Tr = 25°C) Full Scale Current Full Scale Current ser a vs wv 7 | | uses iz aa | “o 20 | tip yt Tf 10 . oss . i 1 at ae ac se . cry “ s c s wo ay Aeteronce Current (wk Commer Moos Input Wollge Range (V Reference Input Frequency Response LSB Propagation Delay ‘ a eT ON sor i aoe ° sma Signe — a & | i og i | (ix | s el fo i 208 $$ $< i pa \\ 1c i 100 ¢ “5 Ce o2 os ve ac oat se cr a) oor o 1 w Frequency (ween vio Full Scale Curent ima. Reterence Amp Common Mode Range Power Supply Current ° = i fs Zia t Sp 3 i” i te Preekie) t I. — "| Tarr bm : ' ! i Sr ° 7 ® eterence Common oor Volluge (V Posie Power Supp'y (Vi

a Operating Characteristics (Cont.) (Ta = 25°C) Power Supply Current Power Supply Current oo TF? oo Tien ame Te i 1 t | ! \\ i 1: i i ° He os a z :oaTTT as z n 2 ra [a cs agunve Power $006 °¥ maven Temperature (°C) A/D Conversion Program List

0000 Ce CONTROL WORD FOR 8255

0002 OUT (8255 {PROGRAM TO 8255

• ‘004 wi =B BOF BIT POINTER INITIALIZE

0006 Mor OA TIT SET WORD

0007 «BT TEST DUT (PORT B, "HIT SET OUTPUT TO PB OF 8255 0008 wort

008 NOP

0008 W (PORT C) READ COMPARATOR

0000 ARC Ap — CARRY FLE

O00E a DEC POINTER COMPARATOR TEST 0011 mor AC 0012 sui UIT RESET 0013 mov OCA

014 DEC POINTER mov AB

0018 ARC {DECREMENT BIT POINTER

O06 w RETURN LSB WAS TESTED? 0018 wo OBA ODI on OC EW BIT SET WORD O08 aM? «MIT TEST OIE _-RETURK WET (MAIK PROGRAM) [CONVERSION END & RETURN TO MAIN PROGRAM PROGRAM MEMORY 731 OYTE CONVERSION TIME TST) pas (TAY STATE) MAX. 323 pa (645 STATE) MIN (@ @ ~ 2 MHz) WORKING REGISTER TDSC (C REGISTER FINAL ANSWER MEMORY)