QUAD/DUAL N-CHANNEL DEPLETION MODE EPAD PRECISION MATCHED PAIR MOSFET ARRAY

Transcription

1 TM DVNCD INR DVIC, INC. QUD/DU N-CHNN DPTION MOD PD PRCIION MTCHD PIR MOFT RRY PD N B D D485/D495 VG(th)= -.5V GNR DCRIPTION D485/D495 ar high prcision monolithic quad/dual dpltion mod N-Channl MOFTs matchd at th factory using D s provn PD CMO tchnology. Ths dvics ar intndd for low voltag, small signal applications. Thy ar xcllnt functional rplacmnts for normally-closd rlay applications, as thy ar normally on (conducting) without any powr applid, ut could turnd off or modulatd whn systm powr supply is turnd on. Ths MOFTs hav th uniqu charactristics of, whn th gat is groundd, oprating in th rsistanc mod for low drain voltag lvls and in th currnt sourc mod for highr voltag lvls and providing a constant drain currnt. D485/D495 MOFTs ar dsignd for xcptional dvic lctrical charactristics matching. s ths dvics ar on th sam monolithic chip, thy also xhiit xcllnt tmpratur tracking charactristics. Thy ar vrsatil as dsign componnts for a road rang of analog applications such as asic uilding locks for currnt sourcs, diffrntial amplifir input stags, transmission gats, and multiplxr applications. Bsids matchd pair lctrical charactristics, ach individual MOFT also xhiits wll controlld paramtrs, naling th usr to dpnd on tight dsign limits. vn units from diffrnt atchs and diffrnt dat of manufactur hav corrspondingly wll matchd charactristics. Ths dpltion mod dvics ar uilt for minimum offst voltag and diffrntial thrmal rspons, and thy ar dsignd for switching and amplifying applications in singl 5V to +/-5V systms whr low input ias currnt, low input capacitanc and fast switching spd ar dsird. Ths dvics xhiit wll controlld turn-off and su-thrshold charactrsitics and thrfor can usd in dsigns that dpnd on su-thrshold charactristics. Th D485/D495 ar suital for us in prcision applications which rquir vry high currnt gain, ta, such as currnt mirrors and currnt sourcs. sampl calculation of th DC currnt gain at a drain currnt of m and gat input lakag currnt of p =,,. It is rcommndd that th usr, for most applications, connct th V+ pin to th most positiv voltag and th V- and IC pins to th most ngativ voltag in th systm. ll othr pins must hav voltags within ths voltag limits at all tims. FTUR Dpltion mod (normally ON) Prcision Gat Thrshold Voltags: -.5V +/-.5V Nominal R G =.V of 54Ω Matchd MOFT to MOFT charactristics Tight lot to lot paramtric control ow input capacitanc V G(th) match (V O ) mv High input impdanc Ω typical Positiv, zro, and ngativ V G(th) tmpratur cofficint DC currnt gain > 8 ow input and output lakag currnts ORDRING INFORMTION ( suffix dnots lad-fr (RoH)) Oprating Tmpratur Rang* C to +7 C C to +7 C PPICTION Functional rplacmnt of Form B (NC) rlay Zro powr fail saf circuits Backup attry circuits Powr failur dtctor Fail saf signal dtctor ourc followrs and uffrs Prcision currnt mirrors Prcision currnt sourcs Capacitivs pros nsor intrfacs Charg dtctors Charg intgrators Diffrntial amplifir input stag High sid switchs Pak dtctors ampl and Hold larm systms Currnt multiplirs nalog switchs nalog multiplxrs Voltag comparators vl shiftrs PIN CONFIGURTION IC* G N D N V - D485 V - V M M 4 4 V + 5 V - D N4 G N4 6 7 M 4 M IC* 8 V - V - 9 IC* G N D N C, PC PCKG D495 V- V- 8 7 M M 6 4 V- 5 IC* G N D N V + 4 D N G N IC* IC* G N D N V- 6-Pin 6-Pin 8-Pin 8-Pin OIC Plastic Dip OIC Plastic Dip Packag Packag Packag Packag D485C D485PC D495 D495P * Contact factory for industrial tmp. rang or usr-spcifid thrshold voltag valus, P PCKG *IC pins ar intrnally connctd, connct to V- Rv. dvancd inar Dvics, Inc. 45 Tasman Driv, unnyval, C Tl: (48) Fax: (48)

2 BOUT MXIMUM RTING Drain-ourc voltag, V D.6V Gat-ourc voltag, V G.6V Powr dissipation 5 mw Oprating tmpratur rang C, PC,, P packag C to +7 C torag tmpratur rang -65 C to +5 C ad tmpratur, sconds +6 C CUTION: D nsitiv Dvic. Us static control procdurs in D controlld nvironmnt. OPRTING CTRIC CHRCTRITIC V+ = +5V V- = -5V T = 5 C unlss othrwis spcifid D485/D495 Paramtr ymol Min Typ Max Unit Tst Conditions Gat Thrshold Voltag VG(th) V ID = µ, VD =.V Offst Voltag VO 7 mv VG(th)-VG(th) Offst VoltagTmpco TCVO 5 µv/ C VD = VD GatThrshold Voltag Tmpco TCVG(th) -.7 mv/ C ID = µ, VD =.V. ID = µ, VD =.V +.6 ID = 4µ, VD =.V On Drain Currnt ID (ON). m VG = +6.V, VD = +5V. VG = +.5V, VD = +5V Forward Transconductanc GF.4 mmho VG = +.5V VD = +5.5V Transconductanc Mismatch GF.8 % Output Conductanc GO 68 µmho VG = +.5V VD = +5.5V Drain ourc On Rsistanc RD (ON) 54 Ω VD =.V VG = +.V Drain ourc On Rsistanc RD (ON) 5 % Tolranc Drain ourc On Rsistanc RD (ON).5 % Mismatch Drain ourc Brakdown BVDX V ID =.µ Voltag VG = -4.5V Drain ourc akag Currnt ID (OFF) 4 p VG = -4.5V, VD =+5V 4 n T = 5 C Gat akag Currnt IG p VD = V, VG = 5V n T =5 C Input Capacitanc CI.5 pf Transfr Rvrs Capacitanc CR. pf Turn-on Dlay Tim ton ns V+ = 5V, R= 5KΩ Turn-off Dlay Tim toff ns V+ = 5V, R= 5KΩ Crosstalk 6 db f = KHz Nots: Consists of junction lakag currnts D485/D495 dvancd inar Dvics of

3 D8xx/D9xx/D48xx/D49xx ar monolithic quad/dual N-Channl MOFTs matchd at th factory using D s provn PD CMO tchnology. Ths dvics ar intndd for low voltag, small signal applications. D s lctrically Programmal nalog Dvic (PD) tchnology provids th industry s only family of matchd transistors with a rang of prcision thrshold valus. ll mmrs of this family ar dsignd and activly programmd for xcptional matching of dvic lctrical charactristics. Thrshold valus rang from -.5V Dpltion to +.5V nhancmnt dvics, including standard products spcifid at -.5V, -.V, -.4V, +.V, +.V, +.4V, +.8V, +.4V, and +.V. D can also provid any customr dsird valu twn -.5V and +.5V. For all ths dvics, vn th dpltion and zro thrshold transistors, D PD tchnology nals th sam wll controlld turn-off, suthrshold, and low lakag charactristics as standard nhancmnt mod MOFTs. With th dsign and activ programming, vn units from diffrnt atchs and diffrnt dat of manufactur hav wll matchd charactristics. s ths dvics ar on th sam monolithic chip, thy also xhiit xcllnt tmpco tracking. This PD MOFT rray product family (PD MOFT) is availal in th thr sparat catgoris, ach providing a distinctly diffrnt st of lctrical spcifications and charactristics. Th first catgory is th D8/D9 Zro-Thrshold mod PD MOFTs. Th scond catgory is th D8xx/ D9xx nhancmnt mod PD MOFTs. Th third catgory is th D48xx/D49xx dpltion mod PD MOFTs. (Th suffix xx dnots thrshold voltag in. V stps, for xampl, xx=8 dnots.8v). PRFORMNC CHRCTRITIC OF PD PRCIION MTCHD PIR MOFT FMIY currnts and channl/junction lakag currnts. Whn ngativ signal voltags ar applid to th gat trminal, th dsignr/usr can dpnd on th PD MOFT dvic to controlld, modulatd and turnd off prcisly. Th dvic can modulatd and turnd-off undr th control of th gat voltag in th sam mannr as th nhancmnt mod PD MOFT and th sam dvic quations apply. PD MOFTs ar idal for minimum offst voltag and diffrntial thrmal rspons, and thy ar usd for switching and amplifying applications in low voltag (V to V or +/-.5V to +/-5V) or ultra low voltag (lss than V or +/-.5V) systms. Thy fatur low input ias currnt (lss than p max.), ultra low powr (microwatt) or Nanopowr (powr masurd in nanowatt) opration, low input capacitanc and fast switching spd. Ths dvics can usd whr a comination of ths charactristics ar dsird. KY PPICTION NVIRONMNT PD( MOFT rray products ar for circuit applications in on or mor of th following oprating nvironmnts: * ow voltag: V to V or +/-.5V to +/- 5V * Ultra low voltag: lss than V or +/-.5V * ow powr: voltag x currnt = powr masurd in microwatt * Nanopowr: voltag x currnt = powr masurd in nanowatt * Prcision matching and tracking of two or mor MOFTs CTRIC CHRCTRITIC Th D8/D9 (quad/dual) ar PD MOFTs in which th individual thrshold voltag of ach MOFT is fixd at zro. Th thrshold voltag is dfind as I D = V D =.V whn th gat voltag V G =.V. Zro thrshold dvics oprat in th nhancmnt rgion whn opratd aov thrshold voltag and currnt lvl (V G >.V and I D > u) and suthrshold rgion whn opratd at or low thrshold voltag and currnt lvl (V G <=.V and I D < u). This dvic, along with othr vry low thrshold voltag mmrs of th product family, constitut a class of PD MOFTs that nal ultra low supply voltag opration and nanopowr typ of circuit dsigns, applical in ithr analog or digital circuits. Th D8xx/D9xx (quad/dual) product family faturs prcision matchd nhancmnt mod PD MOFT dvics, which rquir a positiv ias voltag to turn on. Prcision thrshold valus such as +.4V, +.8V, +.V ar offrd. No conductiv channl xists twn th sourc and drain at zro applid gat voltag for ths dvics, xcpt that th +.V vrsion has a suthrshold currnt at aout n. Th D48xx/D49xx (quad/dual) faturs dpltion mod PD MOFTs, which ar normally-on dvics whn th gat ias voltag is at zro volt. Th dpltion mod thrshold voltag is at a ngativ voltag lvl at which th PD MOFT turns off. Without a supply voltag and/or with V G =.V th PD MOFT dvic is alrady turnd on and xhiits a dfind and controlld on-rsistanc twn th sourc and drain trminals. Th D48xx/D49xx dpltion mod PD MOFTs ar diffrnt from most othr typs of dpltion mod MOFTs and crtain typs of JFTs in that thy do not xhiit high gat lakag Th turn-on and turn-off lctrical charactristics of th PD MOFT products ar shown in th Drain-ourc On Currnt vs Drain-ourc On Voltag and Drain-ourc On Currnt vs Gat- ourc Voltag graphs. ach graph show th Drain-ourc On Currnt vrsus Drain-ourc On Voltag charactristics as a function of Gat-ourc voltag in a diffrnt oprating rgion undr diffrnt ias conditions. s th thrshold voltag is tightly spcifid, th Drain-ourc On Currnt at a givn gat input voltag is ttr controlld and mor prdictal whn compard to many othr typs of MOFTs. PD MOFTs hav similarly to a standard MOFT, thrfor classic quations for a n-channl MOFT applis to PD MOFT as wll. Th Drain currnt in th linar rgion (V D < V G - V G(th) ) is givn y: I D = u. C OX. W/. [V G - V G(th) - V D /]. V D whr: u = Moility C OX = Capacitanc / unit ara of Gat lctrod V G = Gat to ourc voltag V G(th) = Turn-on thrshold voltag V D = Drain to ourc voltag W = Channl width = Channl lngth In this rgion of opration th I D valu is proportional to V D valu and th dvic can usd as gat-voltag controlld rsistor. For highr valus of V D whr V D >= V G - V G(th), th saturation currnt I D is now givn y (approx.): I D = u. C OX. W/. [V G - V G(th) ] D485/D495 dvancd inar Dvics of

4 UB-THRHOD RGION OF OPRTION PRFORMNC CHRCTRITIC OF PD PRCIION MTCHD PIR MOFT FMIY (cont.) ZRO TMPRTUR COFFICINT (ZTC) OPRTION ow voltag systms, namly thos oprating at 5V,.V or lss, typically rquir MOFTs that hav thrshold voltag of V or lss. Th thrshold, or turn-on, voltag of th MOFT is a voltag low which th MOFT conduction channl rapidly turns off. For analog dsigns, this thrshold voltag dirctly affcts th oprating signal voltag rang and th oprating ias currnt lvls. t or low thrshold voltag, an PD MOFT xhiits a turnoff charactristic in an oprating rgion calld th suthrshold rgion. This is whn th PD MOFT conduction channl rapidly turns off as a function of dcrasing applid gat voltag. Th conduction channl inducd y th gat voltag on th gat lctrod dcrass xponntially and causs th drain currnt to dcras xponntially. Howvr, th conduction channl dos not shut off aruptly with dcrasing gat voltag, ut dcrass at a fixd rat of approximatly 6mV pr dcad of drain currnt dcras. Thus if th thrshold voltag is +.V, for xampl, th drain currnt is u at V G = +.V. t V G = +.9V, th drain currnt would dcras to.u. xtrapolating from this, th drain currnt is.u (n) at V G = -.V, n at V G = -.4V, and so forth. This suthrshold charactristic xtnds all th way down to currnt lvls low n and is limitd y othr currnts such as junction lakag currnts. t a drain currnt to dclard zro currnt y th usr, th Vgs voltag at that zro currnt can now stimatd. Not that using th aov xampl, with V G(th) = +.V, th drain currnt still hovrs around n whn th gat is at zro volt, or ground. OW POWR ND NNOPOWR Whn supply voltags dcras, th powr consumption of a givn load rsistor dcrass as th squar of th supply voltag. o on of th nfits in rducing supply voltag is to rduc powr consumption. Whil dcrasing powr supply voltags and powr consumption go hand-in-hand with dcrasing usful C andwidth and at th sam tim incrass nois ffcts in th circuit, a circuit dsignr can mak th ncssary tradoffs and adjustmnts in any givn circuit dsign and ias th circuit accordingly. With PD MOFTs, a circuit that prforms a spcific function can dsignd so that powr consumption can minimizd. In som cass, ths circuits oprat in low powr mod whr th powr consumd is masur in micro-watts. In othr cass, powr dissipation can rducd to nano-watt rgion and still provid a usful and controlld circuit function opration. For an PD MOFT in this product family, thr xist oprating points whr th various factors that caus th currnt to incras as a function of tmpratur alanc out thos that caus th currnt to dcras, thry cancling ach othr, and rsulting in nt tmpratur cofficint of nar zro. On of this tmpratur stal oprating point is otaind y a ZTC voltag ias condition, which is.55v aov a thrshold voltag whn V G = V D, rsulting in a tmpratur stal currnt lvl of aout 68u. For othr ZTC oprating points, s ZTC charactristics. PRFORMNC CHRCTRITIC Prformanc charactristics of th PD MOFT product family ar shown in th following graphs. In gnral, th thrshold voltag shift for ach mmr of th product family causs othr affctd lctrical charactristics to shift with an quivalnt linar shift in V G(th) ias voltag. This linar shift in V G causs th suthrshold I-V curvs to shift linarly as wll. ccordingly, th suthrshold oprating currnt can dtrmind y calculating th gat voltag drop rlativ from its thrshold voltag, V G(th). RD(ON) T VG=GROUND vral of th PD MOFTs produc a fixd rsistanc whn thir gat is groundd. For D8, th drain currnt at V D =.V is at u at V G =.V. Thus just y grounding th gat of th D8, a rsistor with R D(ON) = ~KOhm is producd. Whn an D484 gat is groundd, th drain currnt I D = 8.5 u@ V D =.V, producing R D(ON) = 5.4KOhm. imilarly, D48 and D485 producs 77u and 85u, rspctivly, at V G =.V, producing R D(ON) valus of.kohm and 54Ohm, rspctivly. MTCHING CHRCTRITIC ky nfit of using matchd-pair PD MOFT is to maintain tmpratur tracking. In gnral, for PD MOFT matchd pair dvics, on dvic of th matchd pair has gat lakag currnts, junction tmpratur ffcts, and drain currnt tmpratur cofficint as a function of ias voltag that cancl out similar ffcts of th othr dvic, rsulting in a tmpratur stal circuit. s mntiond arlir, this tmpratur staility can furthr nhancd y iasing th matchd-pairs at Zro Tmpco (ZTC) point, vn though that could rquir spcial circuit configuration and powr consumption dsign considration. D485/D495 dvancd inar Dvics 4 of

5 TYPIC PRFORMNC CHRCTRITIC DRIN OURC ON CURRNT (m) OUTPUT CHRCTRITIC 5 T = +5 C V G -V G(TH) =+5V 4 V G -V G(TH) =+4V V G -V G(TH) =+V V G -V G(TH) =+V V G -V G(TH) =+V DRIN-OURC ON VOTG (V) DRIN-OURC ON RITNC (Ω) DRIN-OURC ON RITNC vs. DRIN-OURC ON CURRNT T = 5 C V G = V G(TH) +4V V G = V G(TH) +6V DRIN-OURC ON CURRNT (µ) DRIN- OURC ON CURRNT (m ) 5 5 FORWRD TRNFR CHRCTRITIC T = 5 C V D = +V VG(TH) =.V VG(TH) = +.V VG(TH) = -.4V VG(TH) = -.V GT-OURC VOTG (V) VG(TH) = -.5V VG(TH) = +.4V VG(TH) = +.8V TRNCONDUCTNC (m/v) TRNCONDUCTNC vs. MBINT TMPRTUR MBINT TMPRTUR ( C) DRIN-OURC ON CURRNT (n) UBTHRHOD FORWRD TRNFR CHRCTRITIC T = +5 C V D =+.V V G(TH) =-.V V G(TH) =.V. V G(TH) =-.5V V G(TH) =+.V V G(TH) =+.8V GT-OURC VOTG (V) V G(TH) =-.4V V G(TH) =+.4V DRIN-OURC ON CURRNT (n). UBTHRHOD FORWRD TRNFR CHRCTRITIC V D =.V lop ~ = mv/dcad. V G(th) V G(th) V G(th) V G(th) V G(th) V G(th) GT-OURC VOTG (V) D485/D495 dvancd inar Dvics 5 of

6 TYPIC PRFORMNC CHRCTRITIC (cont.) DRIN OURC ON CURRNT (m) DRIN-OURC ON CURRNT (µ) 5 4 DRIN OURC ON CURRNT, BI CURRNT vs. MBINT TMPRTUR -55 C -5 C C 7 C 5 C VG(TH)- VG(TH) VG(TH)+ VG(TH)+ VG(TH)+ VG(TH)+4 GT ND DRIN OURC VOTG (VG = VD) (V) DRIN-OURC ON CURRNT vs. ON RITNC. VD =+V T = 5 C VG=-4.V to +5.4V V D =+.V.. ON RITNC (KΩ) V D =+5V V D =+V DRIN OURC ON CURRNT ( µ) GT OURC VOTG (V) 5 V G(TH) +4 V G(TH) + V G(TH) + V G(TH) + V G(TH) V G(TH) - DRIN OURC ON CURRNT, BI CURRNT vs. MBINT TMPRTUR Zro Tmpratur Cofficint (ZTC) 5 C - 5 C V G(TH) V G(TH) V G(TH) V G(TH) V G(TH) V G(TH) GT ND DRIN OURC VOTG (VG = VD) (V) GT OURC VOTG vs. DRIN OURC ON CURRNT V G D V D I D(ON) V D =.5V T = +5 C V D =.5V T = +5 C DRIN OURC ON CURRNT (µ) V D = 5V T = +5 C V D = 5V V D = R ON I D(ON) T = +5 C. DRIN OURC ON CURRNT (m) 5 4 DRIN OURC ON CURRNT vs. OUTPUT VOTG T = 5 C V D = +V V D = +5V V D = +V OFFT VOTG (mv) OFFT VOTG vs. MBINT TMPRTUR RPRNTTIV UNIT VG(TH) V G(TH) + VG(TH)+ V G(TH) + VG(TH)+4 VG(TH) OUTPUT VOTG (V) MBINT TMPRTUR ( C) GT KG CURRNT (p) GT KG CURRNT vs. MBINT TMPRTUR I G MBINT TMPRTUR ( C) GT OURC VOTG vs. ON - RITNC D V D. D485/D495 dvancd inar Dvics 6 of GT OURC VOTG (V) V G(TH) +4 V G(TH) + V G(TH) + V G(TH) + V G(TH) +5 C +5 C V G ON - RITNC (KΩ) I D(ON).V V D 5.V

7 TYPIC PRFORMNC CHRCTRITIC (cont.) DRIN- GT DIOD CONNCTD VOTG TMPCO (mv/ C ) DRIN - GT DIOD CONNCTD VOTG TMPCO vs. DRIN OURC ON CURRNT C T +5 C DRIN OURC ON CURRNT (µ) TRNCONDUCTNC ( mω - ) TRNFR CHRCTRITIC T = 5 C V D = +V VG(TH) =.V VG(TH) = +.V VG(TH) = -.4V VG(TH) = -.5V VG(TH) = -.V VG(TH) = +.4V VG(TH) = +.8V GT-OURC VOTG (V) GT-OURC VOTG - THRHOD VOTG (V) ZRO TMPRTUR COFFICINT CHRCTRITIC V G(TH) =-.5V VG(TH)=-.V, -.4V,.V, +.V, +.8V, +.4V DRIN-OURC ON VOTG (V) GT-OURC VOTG (V) UBTHRHOD CHRCTRITIC 5 C.5 V G(th) =.4V. 55 C VG(th) =.V -.5. DRIN -OURC CURRNT (n) TRNCONDUCTNC ( mω - ) TRNCONDUCTNC vs. DRIN-OURC ON CURRNT. T = 5 C V D = +V DRIN -OURC ON CURRNT(m) THRHOD VOTG (V) V t =.V THRHOD VOTG vs. MBINT TMPRTUR V D = +.V I D =. µ V t =.V MBINT TMPRTUR ( C) V t =.4V V t =.8V V t =.4V GT-OURC VOTG - THRHOD VOTG (V) V G - VG(th)... NORMIZD UBTHRHOD CHRCTRITIC RTIV GT THRHOD VOTG -. 5 C C DRIN-OURC CURRNT (n) V D =.V D485/D495 dvancd inar Dvics 7 of THRHOD VOTG (V) THRHOD VOTG vs. MBINT TMPRTUR V G(th) =.V V G(th) = -.4V V G(th) = -.V V G(th) = -.5V MBINT TMPRTUR ( O C) I D = +µ V D = +.V

8 OIC-6 PCKG DRWING 6 Pin Plastic OIC Packag Millimtrs Inchs Dim Min Max Min Max (45 ) C D D BC.5 BC H (45 ) H C D485/D495 dvancd inar Dvics 8 of

9 PDIP-6 PCKG DRWING 6 Pin Plastic DIP Packag Millimtrs Inchs Dim Min Max Min Max D c D c D485/D495 dvancd inar Dvics 9 of

10 OIC-8 PCKG DRWING 8 Pin Plastic OIC Packag Millimtrs Inchs (45 ) D Dim C D-8 Min Max Min Max BC.5 BC H (45 ) H C D485/D495 dvancd inar Dvics of

11 PDIP-8 PCKG DRWING 8 Pin Plastic DIP Packag Millimtrs Inchs Dim Min Max Min Max D c D c D485/D495 dvancd inar Dvics of