TECHNOLOGY FEATURES B Guaranteed 3.8nV/VHz max 1kHz Noise = Guaranteed 5.5nV//Hz max 10Hz Noise = Very Low Peak-to-Peak Noise, 80nV Typical = Guaranteed 25pV max Offset Voltage = Guaranteed 0.6uV/C max Drift with Temperature Guaranteed 11V/ysec min Slew Rate (OP-37) = Guaranteed 1 Million min Voltage Gain APPLICATIONS Low Level Transducer Amplifiers Precision Threshold Detectors Tape Head Preamplifiers Microphone Preamplifiers Direct Coupled Audio Gain Stages nt AQ OP-27/0P-37 Low Noise, High Speed Precision Operational Amplifiers DESCRIPTION The OP-27/0P-37 series of operational amplifiers combine outstanding noise performance with excellent precision and high speed specifications. The wideband noise is only 3nV/-VHz, and with the 1/f noise corner at 2.7Hz, low noise is maintained for all low frequency instrumentation applica- tions. Precision DC specifications match or exceed the best available op amps: offset voltage is 10x, drift with temperature and time are 0.2nV/C and 0.2nV/month, respectively; common mode reiection is 126dB, voltage gain is two million. The unity gain compensated OP-27 is an order of magnitude faster than other precision op amps. The decompensated OP-37 is even faster at a gain-bandwidth product of 63MHz and 17V/,Sec slew rate. These charac- teristics plus Linear Technologys advanced process and test techniques make the OP-27/37 an excellent choice for performance and reliability in all low noise, precision ampli- fier applications. in addition, Linear's QP-37 is completely latch-up free in high gain, farge capacitive feedback con- figurations. The accurate, microvolt, low noise signal han- dling capabilities of the OP-27 /37 are taken advantage of in the muitiplexed thermocouple application shown. For applications requiring higher performance, see the LT1007 and LT1037 data sheets. _ Low Noise, Multiplexed Thermocouple Amplifier 0.1Hz to 10Hz Noise TYPE THERMOCOUPLES 5.4a/C AT O + Lf COLD JUNCTION at CIRCUITRY > t_ TO GATE 5 DRIVE = + _ 2 x | { o fe ' P oureut = Co ' 2% . g = TYPICAL $ 00k # i | MULTIPLEXING $ 3 P+ ' FET SWITCHES k Hd < 100 ee HIGH QUALITY & - SINGLE POINT GROUND 9 2 4 6 a 10 L TIME (SECONDS) lf 24 channels are multiplexed per second, and the output is required to settle to 0.1% accuracy, the amplifier's bandwidth cannot be limited to less than 30Hz. Yet the noise contribution of the OP-27 will still be only 0.112Vp-p, which is equivalent fo an error of only 0.02C. ourOP-27/OP-37 ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION Supply Voltage ......0.00000.0..00000000, + 22V Internal Power Dissipation ...........0000. 500mW Input Voltage.........000., Equal to Supply Voltage Output Short Circuit Duration... ......0.0.., Indefinite Differential Input Current (Note8).......... + 25mA Lead Temperature (Soldering, 10 sec.)........ 300C Operating Temperature Range OP-27/0P-37A,C .......0.... 55C to 125C OP-27/0P-37E,G .........,.., 25C to 85C Junction Temperature Range OP-27/0P-37A,C ............ 55C to 150C OP-27/0P-37E,G ............ 25C to 125C Storage Temperature Range OP-27/0P-37A,C,E,G 65C to 150C vost ORDER PART NUMBER OBSOLETE PACKAGE OP-27AH OP-37AH OP-27CH OP-37CH ~O- OP-27EH OP-37EH METAL CAN H PACKAGE OP-27GH OP-37GH 10 view OP-27AJ8 OP-37EJ8 OP-27CJ8 OP-37GU8 OP-27EJ8 OP-27EN8 OP-27GJ8 OP-27GN8 HEAMETIC DIP J8 PACKAGE OPavcls OP avtng PLASTIC DIF NS PACKAGE ELECTRICAL CHARACTERISTICS Vg = + 18V, Ta = 25C, unless otherwise noted. OP-27A,E/OP-378,E OP-27C,G/OP-37C,6 SYMBOL | PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Vos Input Offset Voltage (Note 1} 10 25 30 100 BV AVos_ | Long Term Offset Voltage (Note 2} a2 10 a4 20 uv /Mo Atime | Stability los Input Offset Current ? 35 12 75 nA lp Input Bias Current +10 +40 +15 + 80 nA Bn Input Noise Voltage 0 1Hz to tOHz2 (Notes 3 and 5) 0 08 0 18 009 0 25 uNp-p Input Noise Vottage 1,=10Hz (Note 3) 35 55 38 $0 aV/NH2 Density fp =30Hz (Note 3} 31 45 33 56 av vH2 p= 1000Hz2 (Note 3) 30 38 32 44 av/VHz2 In Input Noise Current ip=10Hz (Notes 3 and 6) 17 40 17 pA/vHz Density fp = 30Hz {Notes 3 and 6) 10 23 10 pA/WH2 fo = 1000Hz {Noles 3 and 5} a4 06 0.4 06 pA/vHz Input ResistanceCommon Mode 3 2 GQ Input Voltage Range +110 +123 110 +4123 CMRR | Common Mode Rejection Ratio Vom= & 11V 114 126 100 120 dB PSRR Power Supply Rejection Ratio Vs= +4V to = 18V 100 120 94 118 dB Avo Large Signal Voltage Gain R. = ek, Vo= 4 10V 1000 1800 700 1500 Vim RL = 1kf, Yo = + 10V 800 1500 1500 Vem R, =6009, Vo= + 1 250 700 200 500 Vim Vg = + 4 (Note 4} Vout Maximum Output Voltage Swing | R, > 2k 2120 4138 145 135 Vv R, = 6002 +100 +115 +100 +115 SR Slew Rate OQP-27 R, 2 2k@ (Note 4) 17? 28 17 28 Vi pS OP-37 Aye. & 5 (Note 4) 11 17 11 7 V/s GBW Gain-Bandwidth OP-27 fo = 100kHz (Note 4) 50 80 50 80 MHz Product OP-37 tp = 10kHz (Note 4) 45 63 45 63 MHz fo= 1MHz fAyc, = 5} 40 40 MHz Zo Open Loop Output Resistance Vg=0. Ig =O 70 70 2 Py Power Dissipation 90 140 100 170 mi L ) TERM NOLO =ELECTRICAL CHARACTERISTICS Vg=+15V, 55C <1, = 125C, unless otherwise noted. OP-27/OP-37 OP-27A/0P-37A OP-270/0P-37C SYMBOL | PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Vos Input Offset Voltage | (Note 1) * 30 60 70 300 wy AVos Average Input {Nate 7) * 02 06 04 18 py/ec ATemp Offset Drift los Input Offset Current 15 50 30 135 nA 1g Input Bias Current * + 20 + 60 +35 + 150 nA Input Voltage Range ) 4103 2115 #2102 24115 v CMRR Common Mode Vow = + 10V s 108 122 94 116 cB Rejection Ratio PSRR Power Supply Ve=4+45Vtoz18v | | 96 116 86 110 dB Rejection Ratio Ava Large Signal Ry = 2k, Vo= + 10V * 600 1200 300 800 V/mv Voltage Gain Vout Maximum Output R, = 2kQ @y 4115) 4135 +105 +130 Vv Voltage Swing LECTRICAL CH ARACTERISTICS Vg = + 15V, 25C <Ta< 85C, unless otherwise noted. OP-27E/OP-37E OP-276/OP-376 SYMBOL | PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Vos Input Offset Voltage | (Note 1) * 20 50 5 220 BV AVos Average Input (Note 7) e 02 06 04 18 psec ATemp Offset Drift los input Offset Current e 10 50 20 135 nA lp Input Bias Current * a 14 + 60 + 25 + 150 nA Input Voltage Range ) 4105 +118 +105 #118 Vv CMRR Common Mode Vem = + 10 124 96 118 GB Rejection Ratio PSRR Power Supply Vs= 24 5V to + 18V * 118 s0 114 dB Rejection Ratio Avot Large Signal RL = 2k, Vg= +10V 1500 450 1000 V/m Voltage Gain Vout Maximum Output Ry = 2ka *) 2117 +136 +110 +4133 V Voltage Swing The @ denotes the specifications which apply over full operating temperature range. Note 1: Input Offset Voltage measurements are performed by automatic test equipment approximately 0.5 seconds after application of power. A and E grades are guaranteed fully warmed up. Note 2: Long Term Input Offset Voltage Stability refers to the average trend line of Offset Voltage vs Time over extended periods after the first 30 days of operation. Excluding the initial hour of operation, changes in Vos during the first 30 days are typically 2.52Vrefer to typical pertorm- ance curve. Note 3: Sample tested. Contact factory fer 100% testing of 10Hz voltage noise. one Note 4: Parameter is guaranteed by design and is not tested. Note 5: See test circuit and frequency response curve for 0 tHz to 10Hz tester in Applications Information section. Note 6: See test circuit for current noise measurement in Applications Information section. Note 7: The Average Input Offset Drift performance is within the specifications unnulled of when nulled with a pot having a range of 8ka to 20k2. Note 8: The OP-27/37's inputs are protected by back-to-back diodes. Current limiting resistors are not used in order to achieve low noise. if differential input voltage exceeds + 0.7V, the input current should be limited te 25mA4. 3OP-27/OP-37 TYPICAL PERFORMANCE CHARACTERISTICS Voltage Noise vs Frequency = ~ nn wee o Ta= Vg = 215 1/t CORNER =2 THz VOLTAGE NOISE (n/ viz) 1 10 100 1000 FREQUENCY (H2) Voltage Noise vs Temperature AT 10Hz oh AT kHz Vg = 154 | | VOLTAGE NOISE (nv/ ~ Hz) ao 1 -M -2% Oo 2 SS & 100 125 TEMPERATURE (C) Voltage Gain vs Frequency Ta = 25C Vg= 2 15 VOLTAGE GAIN (dB) 10 100 1k 10k 100k 1M 10M 100M FREQUENCY {Hz} a O11 Input Wideband Voltage Noise vs Bandwidth (0.1Hz to Frequency Indicated} Ww Tg=e5e Vsg= +15 AMS VOLTAGE NOISE (} on a1 14 10 100 BANDWIDTH (kHz) Voltage Noise vs Supply Voltaga 5 Ta=25C AT 10Hz AT 1kHz Seer ee VOLTAGE NOISE (ni/ vz} 7 iF 1 0 10 20 30 40 TOTAL SUPPLY VOLTAGE (* -V-| (VOLTS) Open Loop Voltage Gain vs Supply Voltage 25 T]=25C 20 Lb A = Ry =2K0| > so L171 z ~~ 3 Lo Son L_. /ARL= 1h 5 1.0 E A 0s 4 0.0 a 10 20 wv 40 50 TOTAL SUPPLY VOLTAGE (OLTS} Total Noise vs Source Resistance 00 T,=25C Vg = 2 15 * = S 5 AT 40Hz AT IKE NOISE ONLY 100 tk 10k SOUACE RESISTANCE (0) Current Noise vs Frequency 10.0 CURRENT HOISE (pA/ Hz) = o1 10 100 tk 10k FREQUENCY (Hz) Open Loop Vottage Gain vs Load Resistance 24 T= 2.2 |Ws= +15 20 18 16 14 12 16 a8 06 b4 OPEN LOGP VOLTAGE GAIN (/ u} Ot 14 10 10 LOAD RESISTANCE (xf) LY WeeOP-27/OP-37 a Offset Voltage Dritt of Long Term Drift of Representative Units Representative Units Warm-Up Drift 100 6 Ty = 25C 30 UNE = Vg = + 15 = 4 rend = = 60 3 oan 3 10 wy 40 = 2 S 0P-27/370/6 7 : Be > te 02, VAM it By e aoe UNE E / tt 20 5 e 5 en =, = / DP-27/37A/E = -60 z S A o -4 = a0 > 100 -6 0 -50 -25 O 2 50 75 100 125 a1 2 3 4 5 6 7 8 1 2 3 4 5 TEMPERATURE (C) TIME (MONTHS) TIME AFTER POWER ON (MINUTES) Offset Voltage Change Due Input Bias Current vs Input Offset Current vs to Therma! Shock Temperature Temperature = cae 80 ype 3 i6v 80 ga bisv iB a 3 Ta=tTa= = aa z 4p t& | asec THERMAL eo = e SHOCK 5 \ ig s RESPONSE 2 3 = 40 4 5 BAND = 2 N = 4 NJ a z = 20y < 20 3 5 No SS = n OP-27/370 = = ~~ = 5 10 = ~ 10 e DEVICE IMMERSED OP-27/37A = IN 70C GIL BATH | | OP-27/37A 2 0 1 a | | -0 0 2 40 @ a 100 -50 -25 0 25 50 7h 100 125 190 -75 -8 -25 0 25 50 75 1D0 125 TIME (SECONDS) TEMPERATURE (C) TEMPERATURE {C) Supply Current vs Supply Short Circuit Current vs Maximum Output Swing vs Voltage Time Resistive Load 50 60 Tg=25C "8 Tg =25C Vg= 15 16 |g = + 15 - 50 4 _ 40 = = ie IN 5 12 roewivG = Ta=125C = 4 | = jy) N zo Ss 3 NP Isct -) 2, 3 = Ist +) a 2 a 5 = a") Ta=25C = 2 5 zB 7] Ta= - 55 = = 4 20 as 2 ao a 20 + a 2 dl 1.0 10 5 15 25 35 45 0 1 2 3 4 5 0.1 10 w TOTAL SUPPLY VOLTAGE (VOLTS) TIME FAOM OUTPUT SHORFED TO GROUND (MINUTES) LOAD RESISTANCE (kQ} LY WeeOP-27/OP-37 a a een TYPICAL PERFORMANCE CHARACTERISTICS ~ Common Mode Rejection vs Common Mode Input Range Frequency vs Supply Voltage PSRR vs Frequency 140 owt T,=28C Vg = 215 Ta= 85C z 70 Vom = 10 a Ta=25C = | s | NY = = NEGATIVE = 100 OP-37 B Ty = 125C s SUPPLY = rh rz ia = w i a & 80 i 2 Ta= 55C a 2INN = ii a7 N = a on I 3 Ta=25C = N , Ta=126C 5 NWN A 40 0 104 tot 105 198 10? a 5 +10 15 +20 t 10 10? 107 10% 10 305 1? 1 FAEQUENCY (H2} SUPPLY VOLTAGE{ VOLTS) FREQUENCY (Hz) OP-27 Maximum OP-27 Small Signal OP-27 Large Signal Undistorted Output vs we Transient Response Transient Response Frequency g = SOmv 3 weet? 5 = Ee oy ; = ont E | oa | = sont # e # AyeL = +1, g= + 15 Ayo = 1, g= 2 15 C.=15pF tk 10k 100k 1 10M FREQUENCY (H2} OP-27 Stew Rate, Gain Bandwidth Product, Phase OP-27 Gain, Phase Shift vs Margin vs Temperature Frequency 10 5 80 70 [Ws= 2 15 T,=25C z om PA Ve= 15 =u = 20 tt 109 60 3 = \ Li = * ao 5 18 | 120 & = 3 \ dhe z 50 = 3S i NC MARGIN we 5 rE z Nee | E Ey 4 = Ss 5 N 160 % > = N 8 wg ; o 0 " 18) = & z H fe 5 a 5 en. \ 200 wy ; 6 -10 N 210 -75 -50 -25 0 2 5S) 75 100 125 1 10 100 TEMPERATURE (C) FREQUENCY (MHz] News ae ee weeOP-27/OP-37 _ ee OP-37 Maximum OP-37 Small Signal Undistorted Output vs Transient Response OP-37 Large Signal Response Frequency 26 2 24 = > 16 ov av = 2 12 5om a B Ayo = +5, g= 2 15 Aver= +5, g= + 15 CL=15pF 0 1st 108 108 107 FREQUENCY [Hz} OP-37 Slew Rate, Gain Bandwidth Product, Phase OP-37 Gain, Phase Shift vs Margin vs Temperature Frequency _ = TN ioe | B75 ou = NN N\ Vee 18 = 70 = 50 SD NITT 7 100 = = NUT TF ~ = 65 3 40 i 120 @ iw = w 7 S = 30 140 8 55 Ss = cz s 30 = x 20 160 = 2 25 = 10 120 2 2 z < = o + 200 15 = a 10 a -10 220 - -2 B 5 50 75 1 125 01 10 10 100 TEMPERATURE (C} FREQUENCY (MHz) OP-37 Slew Rate vs Supply OP-37 Slew Rate vs Load Voltage ad er 20 A= A= V5 = 215 = Lea] x __ | Ayo. = +5 RISE ee 14 Yo ahe ~ 8P- ae FALL 4 dl v4 = Loy = E WFR E 10 7 _ 5 /| z 1B rl 5 i 5 0 01 10 10 100 +4 +B 6490 64920 419) (418 21 LGAD RESISTANCE (k0) SUPPLY VOLTAGE (VOLTS) LY WAR {OP-27/OP-37 APPLICATIONS INFORMATION General The OP-27/37 series devices may be inserted directly into OP-07, OP-05, 725, and 5534 sockets with or with- out removal of external compensation or nulling compo- nents. In addition, the OP-27/37 may be fitted to 741 sockets with the removal or modification of external null- ing components. Noise Testing The 0.1Hz to 10Hz peak-to-peak noise of the OP-27 / OP-37 is measured in the test circuit shown. The frequency response of this noise tester indicates that the 0.1Hz cor- fer is defined by only one zero. The test time to measure 0.1Hz to 10Hz noise should not exceed 10 seconds, as this time limit acts as an additional zero to eliminate noise contributions from the frequency band below 0.1Hz. Measuring the typical 80nV peak-to-peak noise perform- ance of the OP-27/37 requires special test precautions: (a) The device should be warmed up for at least five minutes. As the op amp warms up, its offset voltage changes typically 4, due to its chip temperature increasing 10C to 20C from the moment the power supplies are turned on. In the 10 second measure- ment interval these temperature-induced effects can easily exceed tens of nanovolts. 0.1Hz to 10Hz Noise Tast Circuit 109 - VOLTAGE GAIN = =50,000 *OP-27/0P-37 DEVICE UNDER TEST NOTE: ALL CAPACITOR VALUES ARE FOR NON-POLARIZED CAPACITORS ONLY = {b} For similar reasons, the device must be well shielded from air currents to eliminate the possibility of ther- moelectric effects in excess of a few nanovolts, which would invalidate the measurements. (c} Sudden motion in the vicinity of the device can also feedthrough to increase the observed noise. A noise-voltage density test is recommended when measuring noise on a large number of units. A 10Hz2 noise-voltage density measurement will correlate well with a 0.1Hz to 10Hz peak-to-peak noise reading since both results are determined by the white noise and the location of the 1/f corner frequency. Current noise is measured and calculated by the following ww! formula: |, [eno (130nV)2] n=" TMG x 100 10k 0.1Hz to 10Hz p-p Noise Tester Frequency Response 1m 70 GAIN (dB) oot 0.4 10 10 100 FREQUENCY (#2) 8 LI WieAPPLICATIONS INFORMATION Offset Voltage Adjustment The input offset voltage of the OP-27/37, and its drift with temperature, are permanently trimmed at wafer testing to a low level. However, if further adjustment of Vos is necessary, the use of a 10k nulling potentiometer will not degrade drift with temperature. Trimming to a value other than zero creates a crift of (Vog/300) pV/C, .g., if Vos is adjusted to 300zV, the change in drift will be 1pV/C. Standard Adjustment 1v The adjustment range with a 10k pot is approximately + 2.5m. If less adjustment range is needed, the sensi- tivity and resolution of the nulling can be improved by using @ smaller pot in conjunction with fixed resistors. The example has an approximate null range of + 200,V. Improved Sensitivity Adjustment +t5V Offset Voltage and Drift Thermocouple effects, caused by temperature gradients across dissimilar metals at the contacts to the input ter- minals, can exceed the inherent drift of the amplifier unless proper care is exercised. Air currents should be minimized, package leads should be short, the two input leads should be close together and maintained at the Same temperature. one OP-27/OP-37 The circuit shown to measure offset voltage is also used as the burn-in configuration for the OP-27/37, with the supply voltages increased to +20V, R1=R3= 10k, R2=2000, Ay = 100. Test Circuit for Offset Voltage and Offset Voltage Drift with Temperature Re 1000" 4 Vo R34 S0k* Y Vo =1000 Vos *RESISTORS MUST HAVE LOW THEAMCELECTRICG POTENTIAL Unity Gain Buffer Applications (OP-27 Only) When R-< 1000 and the input is driven with a fast, large signal pulse (> 1V), the output waveform will look as shown in the pulsed operation diagram. ourpuT 2 aV/ SEL During the fast feedthrough-like portion of the output, the input protection diodes effectively short the output to the input and a current, limited only by the output short cir- cuit protection, will be drawn by the signal generator. With Ry= 5002, the output is capable of handling the current requirements (1,<20mA at 10V) and the amplifier stays in its active mode and a smooth transition will occur. As with all operational amplifiers when Ry > 2kQ, a pole will be created with Re and the amplifier's input capacitance, creating additional phase shift and reducing the phase margin. A small capacitor (20pF to SOpF} in parallel with Ry will eliminate this problem.OP-27/OP-37 SCHEMATIC DIAGRAM a6 1 q q AA Ate AAA. l I A \. \~ 2 } 023 024 + 3 RON-INVERTING , azo INPUT (+) ota wa 4 019 ria LB} , Q1B o2B he a3 z - - Wie o AAA, _]| \~ vette | A hos INPUT ) os hs pat k a2 027 SK ozs 1 C1 =120pF FOR OP-27 24018 @ 12m Q sara - 1=15pF FOR OP-37 1] 10 oweno~ OP-27/OP-37 SS PACKAGE DESCRIPTION H Package Metal Can 0.3359. 370 (@ 0d 9.598) OA O30 9.395 iF a gs0gh | 0.040 47 O46) 6650 i CE ia 0165-0 185 + MAX 14 131 - 4 695} } om ' REFERENCE SEATING + PLANE A GA pane pt w= UN Pane 9900 0.750 0010-6 045 (lll ( fll {12 70-19 05) ag 9 750-=0.520 (0 254-1 143} ara med fg 2.918 -0. 021 10.406 0 303} 1P 0 O27 - 045 10 B86 - 1 143) as Te 2 2027-0034 AS 1 10.666 - 0 B64) 9.200 0.290, 15.080 - 5 B42) O110-0.160 (2.794 4 064) INSULATING. STANDOFF x WOTE: DIMENSIONS IM INCHES (MILLIMETERS) Tmax uA Oe 150C orcs | 45C/w OMe 2.320 pean a aero (7 620 - 8 128} 0.335 +0.005 =O. + 0.638 vas) NOTE: DIMENSIONS IN INCHES UNLESS OTHERWISE NOTED e+ 0.003 -0 018 [0 203 - 0 460) * O85. 00e% (9 Fo. O 6a NOTE: LEAD QHAMETER {S UNCONTROLLED BETWEEN THE REFERENCE PLANE AND SEATING PLANE. J8 Package 8 Lead Hermetic DIP 0.005 io 127) i MIN 4 | ] (10.287) Ones | tO G3Sr RAG TP > 220-0 0 5598 7 Bra 0200 o0%5 l 15 080) i1 397) *_ ei MAK gor one 4 H 10381 1 524) I i | a"-15 t 4 0,014 ~ 0.026 \|o 0 ith 10.360 0 660 ts 038 - 0 068 mn 0.038 0100+ Oot ipss-tya7, | (2540s O ood aeias NOTE: DNMENSIONS IN INCHES (MILLIMETERS) UNLESS OTHERWISE NOTED LEADS WITHIN 0.007 OF TAUE POSITION (TP) AT GAUGE PLANE Tymax op OBSOLETE PACKAGE aan eee N& Package 8 Lead Plastic 0.400 11 160) MAX fl 1s] Gl r 9250 +0.019, (6 350.20 254) WEI Edo! . 01304 0 00S aten | i (FW 4 O12A 0.065 = a 4 very FI ve om oon = t om f 229 0381) [13 175) 0.045 x 0.015 un + ings 038) | | 9.1003 0.010 | 0,018 +0 003 125401 0.254) ll ees7e0 Fl S188 LEADS WITHIN 0.007 OF TRIE POSITION (TF) AT GAUGE PLANE LI WY Tprax 400C op Tacs will not iefringe on existing patent rights. tnformation fureished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Techamogy Corpora- tion makes no representation that the interconnection of its circuits as described herein 11NOTES a = BAIGP 0506 REY B Linear Technology Corporation 1 2 1630 McCarthy Bivd., is CA eee LJ LINCAR (408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977 # LINEAR TECHNOLOGY CORPORATION 1991