LTITIA/LT311A Ni AR | LM111/LM311 Voltage Comparator TECHNOLOGY FEATURES DESCRIPTION Guaranteed Max Input Offset Voltage 1.0mV Guaranteed Max Input Offset Current 5nA Guaranteed Max Response Time 250nS Guaranteed Min. Voltage Gain 200,000 + 30V Differential Input Voltage Drives 50mA Loads At Up To 50V. Ye The Power Dissipation For LT111A/LT311A The LT111A is an improved version of the LM111 gen- eral purpose comparator. These new devices offer maximum input offset voltage of 1.0mV and input off- set current of 5.0nA with a maximum response time of 250ns. The LT111A operates from a single 5V supply to +15V supplies and can drive up to 50mA loads re- ferred to ground or either supply. A separate output ground pin allows output signals to be isolated from analog ground. The versatility of the LT111A is enhanced by an input Stage design which allows differential input signals of up to +30V. Offset balancing, strobe capability and the ability to OR the output is also included. These APPLICATIONS = General Purpose Comparator = Zero Crossing Detector = Voltage To Frequency Converter Low Drift R/C Oscillator =e 25k < Rg < 200k2 + 15V > FH 4 oy tp 4 , 74HC04S v-@ 10k WA + 15V * 10k eS > N_-wapevw * 1% METAL FILM ** = TRW TYPE MTR-5/ + 120ppm/C. C, = .015 = POLYSTYRENE 120ppm/C + 30ppm WESCO TYPE 32-P NOTE: COMPARATOR-CONTRIBUTES < 10ppm/C DRIFT FOR FREQUENCIES BELOW 10kHz. OUTPUT VOLTAGE (V) Transfer Function uo So COLLECTOR OUTPUT > Qo A, = 1k2 & Oo Ta = 26C nN o EMITTER OUTPUT R, = 6002 _ o 0 -05 -03 ~-010 01 0.3 DIFFERENTIAL INPUT VOLTAGE (mv) 0.5 features plus Linear Technology Corporations ad- vanced processing and reliability enhancements make the LT111A an ideal choice for most comparator appli- Cations. For higher performance requirements, see the LT1011. For operation up to 200C, see LT111X data sheet. LY Wear 6-85LTTIIA/LT3S11A LM111/LM311 ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION Supply Voltage . (pinto pin 4) ..... 0... c cece eee ees 36V - ORO aER Output to Negative Supply GROUND yy UTPUT NU (pin 7 to pin 4) INPUT @) BALANe! LT111AH LTAVIA/LM111 0. eee cece cece ece ees 50V Lg a UM114H LT311A/LM311... 60... 40v mone (T311AH Ground to Negative Supply (pin 1t0 pin 4)... .....ccececcceeeeeee. 30V 10 AOA LM311H Differential Input Voltage ................ +30V Voltage at Strobe Pin (pin 6 to pin 8) .......... 5V TOP VIEW Input Voltage (Note 1)................... + 15V GROUND 1 3 yt ee Output Short Circuit Duration............. 10 sec. INPUT 2 7 OUTPUT LT311Ad8 Operating Temperature Range (Note 2) INPUT 3 6 BALANCE/ STROBE 18 LTAVIA/LMI11 eee 5C to 125C v4 5 BALANCE LM311 LT311A/LMB11 o.oo eee eee 0C to 70C NOTE: PI 4 CONNECTED To CASE. LT311AN8 Storage Temperature Range...... 65C to 150C JB PACKAGE 8 PIN CERDIP LM311N8 Lead Temperature (Soldering, 10 sec.)...... 300C NB PACKAGE 8 PIN PLASTIC LECTRICAL CHARACTERISTICS Vs = +15V, T, = 25C unless otherwise noted. SYMBOL | PARAMETER CONDITIONS PS MAX MIN uP UNITS Vos Input Offset Voltage Rs = 50k 0.7 3.0 mV (Note 3, 4) 40 los Input Offset Current 40 10.0 nA (Note 3,4) 20.0 ls Input Bias Current 60 100 nA Note 3 150 Avo. Large Signal Voltage Gain Note 7 40 200 VimV Response Time Note 5 200 nS Saturation Voltage Vin = 5mV, lout = SOMA 0.75 1.5 Vv V+2>45V, V- =0 Vin = 6BMV, Igay SBMA e 0.23 0.4 0.23 0.4 V Strobe ON Current Note 6 0: 3.0 mA Output Leakage Current Vin = SMV, Voy = 35V 0.2 10.0 0.2 10.0 nA Istaose = 3MA e 0.1 0.5 0.1 0.5 pA Input Voltage Range V+ = 15V, V> = 15V @)} -14.5 [ 13.8 13.0 | -14.5 { 13.8 13.0 v Pin 7 Pull up may go to 5V { 4.7 } -14.7 } Positive Supply Current 0 51 6.0 mA Negative Supply Current 41 5.0 mA Shading of a specification highlights those items which offer key improvements in parametric performance or guaranteed test limits provided for the first time. 6-86 oweLTITIA/LTS11A LM111/LM311 ELECTRICAL CHARACTERISTICS vy, = +151, 25C unless otherwise noted. LT 311A LM311 SYMBOL | PARAMETER CONDITIONS TYP MAX MIN TYP MAX UNITS Vos Input Offset Voltage Rs < 50k 10 2.0 75 mV (Note 3, 4) 10 los Input Offset Current 6.0 50 nA (Note 3,4) 70 lp Input Bias Current 100 250 nA Note 3 300 Avo Large Signal Voltage Gain 40 200 VimV Response Time Note 5 250. 200 ns Saturation Voltage Vin= 10mV, loyy = 50mA 1.5 0.75 1.5 V V+ 245V, V- =0 Vin 10MV, ley < BMA e 023 0.4 0.23 04 Vv Strobe ON Current Note 6 oe BO 40 3.0 mA Output Leakage Current Vin = 10MV, Vogt = 35V 0.2 50 0.2 50 nA IstRogE = 3mA 0.1 0.5 BA Input Voltage Range @| -145 { 13.8 } 13.0 | -14.5 { 13.8 i 13.0 V 14.7 ~-14.7 Positive Supply Current 5.1 75 mA Negative Supply Current 4.1 5.0 mA The @ denotes the specifications which apply over the full operating temperature range. Note 1: Applicable for + 15V supplies. The positive input voltage limit is 30V above the negative supply. The negative input voltage limit is the negative supply. Note 2: T; max. = 150C for the LT111A and 95C for the LT311A. Note 3: Offset voltage, offset current and bias current specifications apply for any supply voltage from a single 5V up to + 15V supplies. Note 4: Offset voltages and offset currents shown are the maximum values required to drive the output within a volt of either supply with a 1mA load. These parameters define an error band and take into account the worst case effects of voltage gain and input impedance. Note 5: Response time is specified for a 100mV input step with SmV overdrive with the collector output terminated with a 5000 pullup resistor tied to 5V. Note 6: Do not short the strobe pin to ground. It should be current driven at 3 to 5mA for the shortest strobe time. Currents as low as 500,.A will strobe the LT111A if speed is not important. External leakage on the strobe pin in excess of 0.2uA when the strobe is off can cause offset voltage shifts. LY Whine 6-87LTITIA/LTSIIA LM111/LM311 TYPICAL PERFORMANCE CHARACTERISTICS Input Bias Current 400 Vs = + 16V - RAISED = 300 (SHORT PINS - 5, 6, AND 8) = " ww . xc c 3 200 wn < ao ~ => = 100 0 : ~55-35-15 5 25 45 65 85 105 125 TEMPERATURE (C) Input Characteristics pi, Vs = + 15V 160 |! ro 1 = 25C = 140 vee we = po ' ' 120 | -+ mn nn & 100 Pf go + 60 a ey 40 [4 -- a INPUT BIAS CU ~16-12 -8 -4 0 4 8 12 16 DIFFERENTIAL INPUT VOLTAGE (V) Response Time for Various Input Overdrives Oo Ow & wo T = o J | | on Oo QoQ INPUT VOLTAGE (mV) OUTPUT VOLTAGE (V) Q 0.2 0.4 0.6 0.8 TIME (uS) Input Offset Current 30 Vs = + 15V z = im 20 xc > oa os @ ELEVATED S 10 (SHORT PINS 5 6, AND 8) S NORMAL 0 5 35-15 5 25 45 68 85 105 125 TEMPERATURE (C) Common Mode Limits V+ - os REFERRED TO SUPPLY VOLTAGES 1.0 15 2.0 0.4 0.3 0.2 0.1 -50-25 0 25 50 75 100 125 TEMPERATURE (C) Response Time for Various Input Overdrives = 8 5 5 4 = 3 & 2 > a 1 = = 3 0 5 ) _ S _50 Vg = 15V e Ta = 25C > 100 = 0 0.2 0.4 0.6 08 TIME (2S) Offset Error _ Q Oo MAXIMUM lt A _ Q we Ne - Vos = Vos ~ Rslos --- EQUIVALENT INPUT OFFSET VOLTAGE (mV) o ua 100k 1M 10M INPUT RESISTANCE (2) = Oo x Transfer Function 50 nm w r oO oa oC OUTPUT VOLTAGE (V) _ o 0 -05 -03 -010 01 03 05 DIFFERENTIAL INPUT VOLTAGE (mV) Collector Output Saturation Voltage 10 --4 0.9 } 08 0.7 0.6 0.5 0.4 03 02 0.1 0 SATURATION VOLTAGE (V) 5 t0 18 20 25 30 35 40 45 50 SINK CURRENT (mA) 6-88 LY WineLTITIA/LT311A LM111/LM311 TYPICAL PERFORMANCE CHARACTERISTICS Response Time Using GND Pin as Output Response Time Using GND Pin as Output Output Limiting Characteristics S S 140 ; 07 36 15 | 20mVv< a = co Ty = 25C Ele dp fv 2 = 120] >> as 06 S smv- if. 5 z a 0s & Vw > ~ 100 : 2 g[2nv f 5 B ; hs, a 3 5 Yi. You 5 = 80 0.4 = I : : ~ 2k 2 C = 10 So nee 2 5 60 | - 03 3 15 may nr - z L SG = = foo 2 S ay CIR 0.2 S 0 E 100 oo ES = a o = 40 oo CUIT CURRENT | S = 25 Ss ee ee 5 90 ro Vs = + 15V" = S50]. ae B 20 ce ee 0.1 = 100 ~T, = 25C z o;--4 we L : j = ri 0 0 0 1 2 3 4 0 1 2 3 4 0 5 10 5 TIME (x5) TIME (uS) OUTPUT VOLTAGE (V) Supply Current Supply Current Leakage Current VS vs vs Supply Voltage Temperature Temperature 5 6 107? aa ad = r | 1V-: 5 Tire Tt : 4 _ S POSITIVE SUPPLY | 210 _> _ COLLECTOR OUTPUT "LO z4 POSITIVE SUPPLY 5 23) = = E nw COLLECTOR OUTPUT LO ai _ 5 S any-3 sy 3 ee 3 an- : 2 2" > a 2 > i ~ 2 are by - =< 1 POSITIVE AND NEGATIVE SUPPLY | | | S10 COLLECTOR OUTPUT "HI" 1 + POSITIVE AND NEGATIVE SUPPLY | | i COLLECTOR OUTPUT HI | | 0 foot | 0 pi 1 1 | 107" 0 5 10 1% 20 2 3 -50-25 0 25 50 75 100 125 2 86945 6665 BH_CsC(itdOS:SC25 SUPPLY VOLTAGE (V) TEMPERATURE (C) TEMPERATURE (C) =e Offset Balancing Strobing Increasing Input Stage Current R2 3.0k Increases typical common mode slew Note: Pin Connections Shown Note: Do Not Ground rate from 7.0 V/uS are for T0-5 package Strobe Pin. to 18V/uS. wat ae LI Wither 6-89 (M) NOLLWdISSIC Y4MOdLTITIA/LT311A LM111/LM311 TYPICAL APPLICATIONS Driving Load Referenced To Positive Supply yt v- yit Rioao V~ OR GROUND V+ + CAN BE GREATER OR LESS THAN Vt Window Detector HIGH 2 LIMIT Vin 2 LOW 3 LIMIT tT yr OUTPUT HIGH INSIDE WINDOW AND LOW ABOVE HIGH LIMIT OR BELOW LOW LIMIT MAGNETIC PICKUP 6-90 INPUTS* Driving Load Referenced Driving Ground Referred Load To Negative Supply re INPUTS * + * NOTE THAT INPUT * NOTE THAT INPUT POLARITY IS REVERSED POLARITY IS REVERSED WHEN USING PIN 1 AS WHEN USING PIN 1 AS : OUTPU Using Clamp Diodes To improve Frequency Response* FROM LADDER NETWORK TPUT D, Dy OUTPU Ry ANALOG INPUT * RESPONSE TIME INCREASES TO =500nS IF INPUT MUST SLEW SV TO REACH THRESHOLD. Crystal Oscillator OUT LY WeLTITIA/LT311A LM111/LM311 Low Drift R/C Oscillator Strobing Off Both Input* And Output Stages FROM D/A NETWORK ea 25k < Rs < 200K sey oe + 16V > Dy Do +o ANALOG INPUT 74HC04'S v~@ KS TTL/CMOS (5V) 10k STROBE vw Fev SAMPLE 10k 1.0k * 1% METAL FILM 1 ** = TRW TYPE MTR-5/ + 120ppm/C. - * TYPICAL INPUT CURRENT IS 50pA = C, = 015 = POLYSTYRENE 120ppm/C + 30ppm WESCO TYPE 32-P WITH INPUTS STROBED OFF. NOTE: COMPARATOR CONTRIBUTES =< 10ppm/C DRIFT FOR DO NOT GROUND STROBE PIN FREQUENCIES BELOW 10kHz. Positive Peak Detector +15V >QUTPUT 15V 2ut il 100pt * SOLID TANTALUM Negative Peak Detector + 15V 10M | 3 Iw AA Vive > OUTPUT 20k 9 INPUT -~~jA-4 + 15V * SOLID TANTALUM LY We 6-91LTITIA/LTSITIA LM111/LM311 SCHEMATIC DIAGRAM BALANCE = BALANCE STROBE Q14 Ce 1905 L 5 Q16 aA 24 . GND v- {J LI PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted. H Package J8 Package N8 Package Metal Can 8 Lead Hermetic Dip 8 Lead Plastic ee (aE OC ae VOM & . m ate \ valom Saar = 0.200 gin 8 ~ | jaa, : | sage | pe J Be pes ee NOTE: LEAD QIAMETER iS UNCONTROLLED BETWEEN THE REFERENCE PLANE AMO SEATING PLANE Tmax Ga Bic Tmax Gj, Tmax G, 150C | 150C/W | 45C/W 150C | 100C/W 100C | 130C/W 6-92 LY \ tte