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LT1031/LH0070 Precision 10V Reference
FEATURES

DESCRIPTIO
Pin Compatible with LH0070 and AD581* Ultralow Drift--5ppm/C Max Slope Trimmed Output Voltage Operates in Series or Shunt Mode Output Sinks and Sources in Series Mode Very Low Noise < 1ppmP-P 0.1Hz to 10Hz > 100dB Ripple Rejection Minimum Input Voltage of 11V
The LT (R)1031 is a precision 10V reference with ultralow drift and noise, extremely good long term stability, and almost total immunity to input voltage variations. The reference output will both source and sink up to 10mA and can be used as a shunt regulator (two terminal Zener) with the same precision characteristics as the three terminal connection. Special care has been taken to minimize thermal regulation effects and temperature induced hysteresis. The LT1031 reference is based on a buried Zener diode structure which eliminates noise and stability problems associated with surface breakdown devices. Further, a subsurface Zener exhibits better temperature drift and time stability than even the best band-gap references. Unique circuit design makes the LT1031 the first three terminal IC reference to offer ultralow drift without the use of high power on-chip heaters. Output voltage is pretrimmed to 0.05% accuracy. The LT1031 can be used as a plug-in replacement for the AD581 and LH0070,* with improved electrical and thermal performance.
, LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. *See LH0070 Electrical Characteristics table and AD581 cross reference guide.
APPLICATIO S

A-to-D and D-to-A Converters Precision Regulators Digital Voltmeters lnertial Navigation Systems Precision Scales Portable Reference Standard
TYPICAL APPLICATIO
Basic Positive and Negative Connections
LT1031 VIN IN GND OUT VOUT GND - VOUT R1 = VIN - VOUT ILOAD + 1.5mA R1 LT1031 OUT
Distribution of Output Accuracy
TA = 25C 35 DISTRIBUTION FROM 5 RUNS PERCENT OF UNITS (%) 30 25 20 15 10 5 40
- VIN
LT1031 * TA01
0 -0.10 -0.06
U
-0.02 0 0.02 0.06 OUTPUT ACCURACY (%) 0.10
LT1031 TA02
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U
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LT1031/LH0070
ABSOLUTE
(Note 1)
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
BOTTOM VIEW INPUT
Input Voltage ........................................................... 40V Input-Output Voltage Differential ............................. 35V Output to Ground Voltage (Shunt Mode Current Limit) ................................. 16V Trim Pin to Ground Voltage Positive ................................................. Equal to VOUT Negative ............................................................. -20V Output Short-Circuit Duration VIN = 35V ......................................................... 10 sec VIN 20V ..................................................... Indefinite Operating Temperature Range LT1031M .......................................... -55C to 125C LT1031C .................................................. 0C to 70C Lead Temperature (Soldering, 10 sec).................. 300C
1 2 3 GROUND H PACKAGE 3-LEAD TO-39 METAL CAN TJMAX = 150C, JA = 150C/W, JC = 45C/W (LH0070) TJMAX = 150C, JA = 150C/W, JC = 45C/W (LT1031M) TJMAX = 85C, JA = 150C/W, JC = 45C/W (LT1031C) OUTPUT
ORDER PART NUMBER LH0070-0H LH0070-1H LH0070-2H LT1031BMH LT1031DMH LT1031BCH LT1031CCH LT1031DCH
ELECTRICAL CHARACTERISTICS
SYMBOL VR PARAMETER Output Voltage (Note 2)
(LT1031) The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VIN = 15V, IOUT = 0, Mil or Comm version, unless noted.
CONDITIONS LT1031B LT1031C LT1031D TMIN TJ TMAX LT1031B LT1031C LT1031D 11.5V VIN 14.5V 4.5V VIN 40V 0.5 12 50 1.2 Shunt Mode Minimum Current Output Short-Circuit Current Minimum Input Voltage (Note 7) VIN is Open 11V VIN 35V lOUT 1mA 0.1Hz f 10Hz 10Hz f 10kHz t = 1000 Hrs Non-Cumulative T = 50C 1.1 30 10.8 6 11 15 5 11.0 MIN 9.995 9.990 9.980 LT1031 TYP 10.000 10.000 10.000 3 6 10 1 MAX 10.005 10.010 10.020 5 15 25 4 6 2 4 25 40 100 150 1.7 2.0 1.5 UNITS V V V ppm/C ppm/C ppm/C ppm/V ppm/V ppm/V ppm/V ppm/mA ppm/mA ppm/mA ppm/mA mA mA mA mA V VP-P VRMS ppm ppm
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VR T
Output Voltage Temperature Coefficient (Note 3)
VR VIN
Line Regulation (Note 4)
VR IO VR IO IQ IMIN
Load Regulation (Sourcing Current) Load Regulation (Shunt Mode) Series Mode Supply Current
0 IOUT 10mA (Note 4) 1.7mA ISHUNT 10mA (Notes 4, 5)
en VR Time
Output Voltage Noise Long Term Stability of Output Voltage Temperature Hysteresis of Output
2
U
W
U
U
WW
W
LT1031/LH0070
ELECTRICAL CHARACTERISTICS
SYMBOL VR VR PARAMETER Output Voltage Output Accuracy - 0, -1 -2 Output Accuracy - 0, -1 -2 Output Voltage Change with Temperature -0 -1 -2 Line Regulation - 0, -1 -2 Input Voltage Range VR IO IQ lQ VIN en rO VZ Time Load Regulation Quiescent Current Change in Quiescent Current Output Noise Voltage Ripple Rejection Output Resistance Long Term Stability - 0, -1 -2 TA = 25C (Note 8) f = 120Hz 0mA lOUT 5mA 13V VIN 33V VIN = 20V from 13V TO 33V
(LH0070) The denotes the specifications which apply over the full operating temperature range. VIN = 15V, RL = 10k, - 55C TA 125C, unless noted.
CONDITIONS TA = 25C TA = 25C MIN LH0070 TYP 10.000 0.03 0.02 0.1 0.05 0.3 0.2 MAX UNITS V % % % %
VR
TA = -55C, 125C
VR T
Note 6 13V VIN 33V, TA = 25C 0.006 0.006 11.4 0.01 1.2 0.1 6 0.001 0.2 0.6 0.2 0.05 0.1 0.03 40 0.03 5 1.5 % % V % mA mA VP-P %/VP-P %/Yr %/Yr 0.02 0.01 0.2 0.1 0.04 % % %
VR VIN
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: Output voltage is measured immediately after turn-on. Changes due to chip warm-up are typically less than 0.005%. Note 3: Temperature coefficient is measured by dividing the change in output voltage over the temperature range by the change in temperature. Separate tests are done for hot and cold: TMIN to 25C and 25C to TMAX. Incremental slope is also measured at 25C. For LT1031BMH, the 5ppm/C drift specification is for - 25C to 85C. Drift over the full - 55C to 125C range is guaranteed to 7ppm/C.
Note 4: Line and load regulation are measured on a pulse basis. Output changes due to die temperature change must be taken into account separately. Package thermal resistance is 150C/W. Note 5: Shunt mode regulation is measured with the input open. With the input connected, shunt mode current can be reduced to 0mA. Load regulation will remain the same. Note 6: Temperature drift is guaranteed from -25C to 85C on LH0070. Note 7: See curve for guaranteed minimum VIN versus IOUT. Note 8: Guaranteed by design.
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LT1031/LH0070 CROSS REFERENCE
The following cross reference guide may be used to select LT1031 grades which meet or exceed output voltage, temperature drift, load and line regulation, and output current specifications of the AD581 reference. Parameters such as noise, hysteresis, and long term stability will be significantly better for all LT1031 grades compared to the AD581.
CROSS REFERENCE GUIDE/LT1031 TO AD581 AD581J AD581K AD581L A0581S A0581U order LT1031DCH order LT1031CCH order LT1031BCH order LT1031DMH order LT1031BMH
TYPICAL PERFOR A CE CHARACTERISTICS
Ripple Rejection
115 110 REJECTION (dB)
REJECTION (dB)
f = 150Hz
INPUT VOLTAGE (V)
105 100 95 90 85 0 5 10
15 20 25 30 INPUT VOLTAGE (V)
Start-Up (Series Mode)
13 12 11
OUTPUT VOLTAGE (V)
VIN = 0 TO 12V
NOISE VOLTAGE (nV/Hz)
10 9 8 7 6 5 4 3 0 2 4 6 8 TIME (s) 10 12 14
OUTPUT VOLTAGE (V)
4
UW
U
Ripple Rejection
130 120 110 100 90 80 70 60 50 35 40 10 100 1k FREQUENCY (Hz) 10k
LT1031 * TPC02 LT1031 * TPC01
Minimum Input Voltage
11.6 11.4 11.2 11.0 10.8 10.6 10.4 10.2 10.0 0 2 4 6 8 10 12 14 16 18 20 OUTPUT CURRENT (mA)
LT1031 * TPC03
VIN = 15V COUT = 0
GUARANTEED CURVE-ALL TEMPS
TJ = 125C TJ = -55C
TJ = 25C
Start-Up (Shunt Mode)
11 10 9 8
-12V 1k VOUT OUT NC IN GND
Output Voltage Noise Spectrum
400 350 300 250 200 150 100 50
7 6 5 0 2
0V
6 4 TIME (s)
8
10
12
0 10 100 1k FREQUENCY (Hz) 10k
LT1031 * TPC06
LT1031 * TPC04
LT1031 * TPC05
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LT1031/LH0070 TYPICAL PERFOR A CE CHARACTERISTICS
Output Voltage Noise
16 14 12
RMS NOISE (V)
COUT = 0 FILTER = 1 POLE fLOW = 0.1Hz OUTPUT CHANGE (mV)
2 1 0 -1 -2 -3 -4
OUTPUT VOLTAGE (V)
10 8 6 4 2 0 10 100 1k BANDWIDTH (Hz) 10k
LT1031 * TPC07
Input Supply Current
1.8 1.6 1.4
INPUT CURRENT (mA)
IOUT = 0
TJ = -55C
CURRENT INTO OUTPUT (mA)
TJ = 25C TJ = 125C
1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 TJ = 125C TJ = 25C TJ = -55C
CURRENT INTO OUTPUT (mA)
1.2 1.0 0.8 0.6 0.4 0.2 0 0 5 10
25 30 INPUT VOLTAGE (V)
15
20
Thermal Regulation
VIN = 30V POWER = 200mW
OUTPUT VOLTAGE CHANGE OUTPUT CHANGE (mV)
OUTPUT VOLTAGE CHANGE
0 -0.5 -1.0 -1.5 ILOAD = 10mA LOAD REGULATION THERMAL* REGULATION
-20
40 60 80 100 120 140 TIME (ms) *INDEPENDENT OF TEMPERATURE COEFFICIENT 0 20
LT1031 * TPC13
UW
35
LT1031 * TPC10
Load Regulation
5 4 3 VIN = 12V 10.006 10.004 10.002 10.000 9.998 9.996
Output Voltage Temperature
-5 -10 -8 -6 -4 -2 0 2 4 6 8 SOURCING SINKING OUTPUT CURRENT (mA)
10
9.994 -50 -25
50 25 75 0 TEMPERATURE (C)
100
125
LT1031 * TPC08
LT1031 * TPC09
Shunt Characteristics
1.8 1.6 INPUT PIN OPEN
Shunt Mode Current Limit
60 50 40 30 20 10 0 INPUT PIN IS OPEN
40
0
2 4 6 10 8 OUTPUT TO GROUND VOLTAGE (V)
12
0
2
4
6 8 10 12 14 OUTPUT VOLTAGE (V)
16
18
LT1031 * TPC11
LT1031 * TPC12
Load Transient Response CLOAD = 0
ISOURCE = 100Ap-p ISOURCE = 0 ISINK = 100Ap-p ISINK = 0.6mA 50mV 10mV ISINK = 0.8mA ISOURCE = 0.2mA
Load Transient Response CLOAD = 1000pF
ISOURCE = 100Ap-p ISOURCE = 0 ISINK = 100Ap-p ISINK = 0.8mA 20mV 5mV ISINK = 1.2mA
ISOURCE = 0.5mA ISOURCE = 2 TO 10mA ISINK = 1.4mA
ISINK = 1.0mA
ISOURCE = 2 TO 10mA -2 0 1 2
ISINK = 2 TO 10mA 9 0 2 4
ISINK = 2 TO 10mA 680246 TIME (s) NOTE VERTICAL SCALE CHANGE BETWEEN SOURCING AND SINKING 8
345678 TIME (s) NOTE VERTICAL SCALE CHANGE BETWEEN SOURCING AND SINKING
LT1031 * TPC14
LT1031 * TPC15
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LT1031/LH0070 TYPICAL PERFOR A CE CHARACTERISTICS
Output Noise 0.1Hz to 10Hz
OUTPUT VOLTAGE NOISE (10V/DIV)
FILTERING = 1 ZERO AT 0.1Hz 2 POLES AT 10Hz
APPLICATIO S I FOR ATIO
Trimming Output Voltage
The LT1031 output can be trimmed by driving the ground pin. The suggested method is shown in the illustration below. A 5 resistor is inserted in series with the ground pin. The top of the resistor is supplied current from a trim potentiometer. This technique requires fairly high trim current of up to 1.5mA from the LT1031 or 3.5mA from the -15V supply; however it is necessary to maintain low drift in the reference. Ground pin current changes in the LT1031, with temperature, could be as high as 4A/C. This, coupled with the 5 external resistor, creates up to 2ppm/C drift in the reference (5 * 4A/C = 20V/C = 2ppm/C). If induced drift higher than this can be tolerated, all resistor values in the trim circuit can be raised proportionately to reduce current drain.
Output Voltage Trimming
LT1031 VIN IN GND R2* 4.3k R1** 5 -15V *CAN BE INCREASED TO 5.6k FOR LT1031B AND LH0070-2 **INCREASE TO 10 FOR LT1031D R3 50k OUT VOUT
MAXIMUM TEMPERATURE COEFFICIENT FOR 1/2LSB ERROR (ppm/C)
LT1031 * TA04
6
U
W
UW
10V (1ppm)
0
1
4 3 2 TIME (MINUTES)
5
6
LT1031 * TPC16
UU
Effect of Reference Drift on System Accuracy A large portion of the temperature drift error budget in many systems is the system reference voltage. The graph below indicates the maximum temperature coefficient allowable if the reference is to contribute no more than 1/2LSB error to the overall system performance. The example shown is a 12-bit system designed to operate over a temperature range from 25C to 65C. Assuming the system calibration is performed at 25C, the temperature span is 40C. The graph shows that the temperature coefficient of the reference must be no worse than 3ppm/C if it is to contribute less than 1/2LSB error. For this reason, the LT1031 has been optimized for low drift.
Maximum Allowable Reference Drift
100
8-BIT
10
10-BIT
12-BIT 14-BIT
1.0
10 20 30 40 50 60 70 80 90 100 TEMPERATURE SPAN (C)
LT1031 * TA03
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LT1031/LH0070
APPLICATIO S I FOR ATIO
Capacitive Loading and Transient Response The LT1031 is stable with all capacitive loads, but for optimum settling with load transients, output capacitance should be under 1000pF. The output stage of the reference is class AB with a fairly low idling current. This makes transient response worst-case at light load currents. Because of internal current drain on the output, actual worst-case occurs at I LOAD = 1.4mA (sinking). Significantly better load transient response is obtained by moving slightly away from these points. See Load Transient Response curves for details. In general, best transient response is obtained when the output is sourcing current. In critical applications, a 10F solid tantalum capacitor with several ohms in series provides optimum output bypass. Kelvin Connections Although the LT1031 does not have true force/sense capability at its outputs, significant improvements in ground loop and line loss problems can be achieved with proper hook-up. In series mode operation, the ground pin of the LT1031 carries only 1mA and can be used as a sense line, greatly reducing ground loop and loss problems on the low side of the reference. The high side supplies load current so line resistance must be kept low. Twelve feet of #22 gauge hook up wire or 1 foot of 0.025 inch printed circuit trace will create 2mV loss at 10mA output current. This is equivalent to 1LSB in a 10V, 12-bit system. The following circuits show proper hook-up to minimize errors due to ground loops and line losses. Losses in the output lead can be greatly reduced by adding a PNP boost transistor if load currents are 5mA or higher. R2 can be added to further reduce current in the output sense lead.
Standard Series Mode
LT1031 INPUT IN GND OUT KEEP THIS LINE RESISTANCE LOW
LOAD
GROUND RETURN
LT1031 * TA05
U
Series Mode with Boost Transistor
INPUT R1 220 2N3906 IN LT1031 GND OUT R2* 5.6k LOAD GROUND RETURN *OPTIONAL--REDUCES CURRENT IN OUTPUT SENSE LEAD
LT1031 * TA06
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UU
Effects of Air Movement on Low Frequency Noise The LT1031 has very low noise because of the buried zener used in its design. In the 0.1Hz to 10Hz band, peak-to-peak noise is about 0.5ppm of the DC output. To achieve this low noise, however, care must be taken to shield the reference from ambient air turbulence. Air movement can create noise because of thermoelectric differences between IC package leads (especially kovar lead TO-5) and printed circuit board materials and/or sockets. Power dissipation in the reference, even though it rarely exceeds 20mW, is enough to cause small temperature gradients in the package leads. Variations in thermal resistance, caused by uneven airflow, create differential lead temperatures, thereby causing thermoelectric voltage noise at the output of the reference. The XY plotter trace shown on the following page dramatically illustrates this effect. The first half of the plot was done with the LT1031 shielded from ambient air with a small foam cup. The cup was then removed for the second half of the trace. Ambient in both cases was a lab environment with no excessive air turbulence from air conditioners, opening/closing doors, etc. Removing the foam cup increases the output noise by almost an order of magnitude in the 0.01Hz to 1Hz band! The kovar leads of the TO-5 (H) package are the primary culprit. Alloy 42 and copper lead frames used on dual-inline packages are not nearly as sensitive to thermally generated noise because they are intrinsically matched.
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LT1031/LH0070
APPLICATIO S I FOR ATIO
There is nothing magical about foam cups--any enclosure which blocks air flow from the reference will do. Smaller enclosures are better since they do not allow the build-up of internally generated air movement. Naturally, heat generating components external to the reference itself should not be included inside the enclosure.
OUTPUT VOLTAGE NOISE (20V/DIV)
APPLICATIO CIRCUITS
Negative Series Reference
15V R1 4.7k IN R2 4.7k D1 15V GND -10V AT 50mA
LT1031 * AC01
LT1031 OUT
-15V
Q1 2N2905
Boosted Output Current with Current Limit
V+ 12.8V D1* LED R1 220 8.2
2N2905 IN LT1031 GND OUT 10V AT 100mA 2F SOLID TANT
+
*GLOWS IN CURRENT LIMIT DO NOT OMIT
LT1031 * AC03
8
U
0
W
UU
Noise Induced by Air Turbulence (TO-5 Package)
(TO-5 PACKAGE) f = 0.01Hz to 10Hz
20V
FOAM CUP REMOVED
2
8 6 4 TIME (MINUTES)
10
12
LT1031 * TA07
U
Boosted Output Current with No Current Limit
V+ 11.8V R1 220 2N2905 IN LT1031 GND OUT 10V AT 100mA 2F SOLID TANT
LT1031 * AC02
+
Handling Higher Load Currents
15V 30mA
IN LT1031 GND OUT
R1* 169 VOUT = 10V TYPICAL LOAD CURRENT = 30mA
RL
*SELECT R1 TO DELIVER TYPICAL LOAD CURRENT LT1031 WILL THEN SOURCE OR SINK AS NECESSARY TO MAINTAIN PROPER OUTPUT. DO NOT REMOVE LOAD, AS OUTPUT WILL BE DRIVEN (UNREGULATED) HIGH. LINE REGULATION IS DEGRADED IN THIS APPLICATION LT1031 * AC04
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LT1031/LH0070
APPLICATIO CIRCUITS
Strain Gauge Conditioner for 350 Bridge
R1 357 1/2W
15V
6 1
LM301A
100pF
8
R5 2M R6 2M* -5V 357 1/2W -15V *THIS RESISTOR PROVIDES POSITIVE FEEDBACK TO THE BRIDGE TO ELIMINATE LOADING EFFECT OF THE AMPLIFIER. EFFECTIVE ZIN OF AMPLIFIER STAGE IS 1M. IF R2-R5 ARE CHANGED, SET R6 = R3 **BRIDGE IS ULTRA LINEAR WHEN ALL LEGS ARE ACTIVE, TWO IN COMPRESSION AND TWO IN TENSION, OR WHEN ONE SIDE IS ACTIVE WITH ONE COMPRESSED AND ONE TENSIONED LEG OFFSET AND DRIFT OF LM301A ARE VIRTUALLY ELIMINATED BY DIFERENTIAL CONNECTION OF LT1012C
LT1031 * AC05
Ultralinear Platinum Temperature Sensor*
LT1031 OUT GND R2* 5k R1** 253k IN 20V
R10 182k 1%
R11 6.65M 1% Rf** 654k
R9 100k
R8 10M
R3** 5k
R4 4.75k 1% RS 100 AT 0C
R5 200k 1%
2
- +
20V 7 LT1001 6
3
4 -15V
R7 392k 1% -15V
R6 619k 1%
STANDARD INDUSTRIAL 100 PLATINUM 4-WIRE SENSOR, ROSEMOUNT 78S, OR EQUIVALENT. = 0.00385
TRIM R9 FOR VOUT = 0 AT 0C TRIM R12 FOR VOUT = 10V AT 100C TRIM R14 FOR VOUT = 5V AT 50C USE TRIM SEQUENCE AS SHOWN. TRIMS ARE NON-INTERACTIVE SO THAT ONLY ONE TRIM SEQUENCE IS NORMALLY REQUIRED. *FEEDBACK LINEARIZES OUTPUT TO 0.005C FROM - 50C TO 150C **WIREWOUND RESISTORS WITH LOW TC
LT1031 * AC06
+
-
2
R4 20k
3
-
U
28mA LT1031 IN GND OUT 28.5mA 5V 350 STRAIN GUAGE BRIDGE** R2 20k R3 2M
+
3
2
LT1012C
6
VOUT * 100
R14 5k R15 10k
R12 1k R13 24.3k VOUT = 100mV/C -50C T 150C
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LT1031/LH0070
APPLICATIO CIRCUITS
2-Pole Lowpass Filtered Reference
MYLAR 1F VIN
10
U
-
LT1031 VIN IN GND OUT R2 36k f = 10Hz 0.5F MYLAR R1 36k LT1001 +VREF
+
TOTAL NOISE 2VRMS 1Hz f 10kHz
-VREF
LT1031 * AC07
Negative Shunt Reference Driven by Current Source
LT1031 OUT GND -10V (ILOAD 1mA) 2.5mA
LM334
27
-11V TO -40V
LT1031 * AC08
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LT1031/LH0070
APPLICATIO CIRCUITS
Precision DAC Reference with System TC Trim
LT1031 15V IN GND OUT 8.87k 1% 50k ROOM TEMP TRIM
EQUIVALENT SCHEMATIC
INPUT
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
W
U
D1 IN457 1.24k 1%
50k TC TRIM* 10k 1%
10k 1%
10.36k 1%
D2 IN457 50k
200k 1%
1mA
8.45k
*TRIMS 1mA REFERENCE CURRENT TC BY 40ppm/C. THIS TRIM SCHEME HAS VERY LITTLE EFFECT ON ROOM TEMPERATURE CURRENT TO MINIMIZE ITERATIVE TRIMMING.
DAC
LT1031 * AC09
U
Q3 D1 D2 OUTPUT D3 Q1 R1
-
A1 D4 6.3V
+
R2
Q2 GND
LT1031 * ES01
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LT1031/LH0070
PACKAGE DESCRIPTIO U
H Package 3-Lead TO-39 Metal Can
(Reference LTC DWG # 05-08-1330)
.350 - .370 (8.890 - 9.398) .305 - .335 (7.747 - 8.509) .050 (1.270) MAX REFERENCE PLANE .165 - .185 (4.191 - 4.699) * .016 - .019** (0.406 - 0.483) DIA .200 (5.080) TYP .500 (12.700) MIN .100 (2.540) PIN 1 .029 - .045 (0.737 - 1.143) .028 - .034 (0.711 - 0.864) .100 (2.540) 45
H3(TO-39) 0801
*LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE AND .050" BELOW THE REFERENCE PLANE .016 - .024 **FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS (0.406 - 0.610)
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Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 FAX: (408) 434-0507
LT 1105 REV B * PRINTED IN USA
www.linear.com
(c) LINEAR TECHNOLOGY CORPORATION 2005

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