5-bit DAC

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Poor Models of some Old Soviet Op-Amps + µA741

 

Name The closest analog К157УД2 2x LM301 К174УН4Б none К548УН1А LM381 co К553УД2 LM301 К554СА3 LM311 КР1407УД2 (LM4250) КР140УД1208 µA776C MC1776 КР140УД1408А LM308 КР140УД7 µA741 КР140УД8А µA740 (MC1556) КР538УН2 none КР538УН3А (LM387N co)

Name ss VSMIN ss VSMAX ss IS ss VIO ss IIO ss IIB ss RIDIF ss GBW ss SR ss

about ::

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Some tests :: Zipped Source

 

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Some more tests ::

 

PS ! the last figure specifies the INP voltage range ( ! not the the one of the OUTP ! )

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an improved ver. of the above ::

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Virtual eval. of some LoVo OpAmp.-s

 is what the title says :

Text as a text :

Pass TEST *TLV314 -- struggles near rails but passes (1.8÷5.5V)* TLV2371 -- inp max 2.58V *TLV9102 -- struggles near the low rail but passes (2.7÷16V)* TL3472 -- inp min max 1.0 to 3.4 V OPA2990 -- inp max 2.49V *OP284 struggles near rails but passes better the TLV314 (3÷36V)* !!! -- MC33071 -- is over idealized model -- !!! (no significant problems) LMV824 -- inp MAX ? 3.1 to 3.8 V (exact value indeterminable) *LM7321 -- struggles near the rails but passes smoother than OP284 (2.5÷32V)* *LM6142 -- same as LM7321 but faster (1.8÷24V)* LM358 -- min max 404 to 2097 mV !!! a MACRO MODEL   ( the transistor model requires a scaled input to prevent the spurious oscillation !!! ) *AD8628 -- struggles near rails but passes somewhat worse the rest R2R passers (2.7÷5V)*

note : if there will be no spurious oscillations configuring the LM358 , LM324 as the unity buffer shown at above fig. then the sentence "the transistor model requires a scaled input to prevent the spurious oscillation" has no meaning in real-life otherwise the recommended biasing scheme is as http://tinyurl.com/yyvgyz32

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CD4013 by state machine

 about

model

* CD4013S.cir * Q iQ CPE R D S Vss Vdd .subckt CD4013S 1 2 3 4 5 6 7 14 .param zVt = 2/(5**.5+3) .param zVtH = zVt/5 * OUTPUT 1Ohm R20 121 1 1 R21 122 2 1 S1 14 121 114 0 FMSW S2 121 7 114 0 FMiS S3 14 122 115 0 FMSW S4 122 7 115 0 FMiS * GENERAL B1 99 0 V=V(15,7)*2 R1 99 0 10k B2 98 0 V=zVt R2 98 0 10k R3 14 15 5E5 R4 15 7 5E5 C4 15 7 5E-13 * C 103 * R 104 * D 105 * S 106 B3 103 0 V=if(V(99)>2,V(3,7)/V(99),0) B4 104 0 V=if(V(99)>2,V(4,7)/V(99),0) B5 105 0 V=if(V(99)>2,V(5,7)/V(99),0) B6 106 0 V=if(V(99)>2,V(6,7)/V(99),0) * ED EL iD D Q iQ R10 110 0 1k R11 111 0 1k R12 112 0 1k R13 113 0 1k R14 114 0 1k R15 115 0 1k * ED - enable data Q0 110 .machine .state sa0 0 .state sa1 1 .rule sa1 sa0 (V(110)>V(98)) & (V(103)>V(98)) & (V(111)<V(98)) .rule sa0 sa1 (V(110)<V(98)) & (V(103)<V(98)) & (V(111)<V(98)) .output (110) state .endmachine * EL - enable latch Q1 111 .machine .state sb0 0 .state sb1 1 .rule sb1 sb0 (V(111)>V(98)) & (V(110)<V(98)) & (V(103)<V(98)) .rule sb0 sb1 (V(111)<V(98)) & (V(110)<V(98)) & (V(103)>V(98)) .output (111) state .endmachine * INP Buff iD _Q2 112 .machine .state sc0 0 .state sc1 1 .rule sc1 sc0 (V(112)>V(98)) & (V(104)<V(98)) & ( ( (V(110)>V(98)) & (V(105)>V(98)) ) | ( (V(110)<V(98)) & (V(113)>V(98)) ) ) .rule sc0 sc1 (V(112)<V(98)) & ( ( (V(110)>V(98)) & (V(105)<V(98)) ) | (V(104)>V(98)) ) .output (112) state .endmachine * INP Buff D Q2 113 .machine .state so0 0 .state so1 1 .rule so1 so0 (V(113)>V(98)) & (V(112)>V(98)) & (V(106)<V(98)) .rule so0 so1 (V(113)<V(98)) & ( (V(112)<V(98)) | (V(106)>V(98)) ) .output (113) state .endmachine * OUTP Buff Q Q3 114 .machine .state sd0 0 .state sd1 1 .rule sd1 sd0 (V(114)>V(98)) & (V(106)<V(98)) & ( ( (V(111)>V(98)) & (V(112)>V(98)) ) | ( (V(111)<V(98)) & (V(115)>V(98)) ) ) .rule sd0 sd1 (V(114)<V(98)) & ( ( (V(111)>V(98)) & (V(112)<V(98)) ) | (V(106)>V(98)) ) .output (114) state .endmachine * OUTP Buff iQ _Q3 115 .machine .state sx0 0 .state sx1 1 .rule sx1 sx0 (V(115)>V(98)) & (V(114)>V(98)) & (V(104)<V(98)) .rule sx0 sx1 (V(115)<V(98)) & ( (V(114)<V(98)) | (V(104)>V(98)) ) .output (115) state .endmachine .model FMSW SW(Ron=1 Roff=.1G Vt={zVt} Vh={-zVtH} Ilimit=.1) .model FMiS SW(Ron=.1G Roff=1 Vt={zVt} Vh={-zVtH} Ilimit=.1) .ends

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LM311 & LM393 common mode sensitivity test

LM311 auto-biasing test

LM311 optimal (most sensitive) input voltage offset TEST

LM393 optimal (most sensitive) input voltage offset TEST

LM393 oscillator forcing the input to it's optimal common input voltage offset ... Vee/Vss/-Vs

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