LT1034-1.2/LT1034-2.5 Micropower Dual Reference FEATURES DESCRIPTIOU n Guaranteed 20 ppm/(cid:176) C Drift The LT®1034 is a micropower, precision 1.2V/2.5 refer- (cid:176) n Guaranteed 40 ppm/ C Drift (SO-8 Package) ence combined with a 7V auxiliary reference. The 1.2V/2.5V m n 20 A to 20mA Operation (1.2V) reference is a trimmed, thin-film, band-gap, voltage refer- n Dynamic Impedance: 1W ence with 1% initial tolerance and guaranteed 20ppm/(cid:176) C n 7V, 100m A Reference temperature drift. Operating on only 20m A, the LT1034 offers guaranteed drift, low temperature cycling hyster- APPLICATIOU S esis and good long-term stability. The low dynamic im- pedance makes the LT1034 easy to use from unregulated n Portable Meters supplies. The 7V reference is a subsurface zener device for n Precision Regulators less demanding applications. n Calibrators The LT1034 reference can be used as a high performance upgrade of the LM385 or LT1004, where guaranteed temperature drift is desired. , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATIOU Temperature Drift LT1034CS8-1.2 15V 2.5 2.0 V) 50k 500k E (m 1.5 G 1.0 N 7V OUTPUT 1O.U2TVP OURT 2.5V E CHA 0.5 G 0 A 7V 1O.R2 225.5V00V VOLT–0.5 SE –1.0 R E V–1.5 E R –2.0 LT1034 • TA01 –2.5 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) LT1034 • TPC02 1034fe 1

LT1034-1.2/LT1034-2.5 ABSOLUTE WMAXIWMUWM RATINUGS (Note 1) Operating Current................................................. 20mA Operating Temperature Forward Current (Note 2) ..................................... 20mA Commercial.............................................0(cid:176) to 70(cid:176) C Storage Temperature Range................. –65(cid:176) C to 150(cid:176) C Industrial.......................................... –40(cid:176) C to 85(cid:176) C Lead Temperature (Soldering, 10 sec)..................300(cid:176) C Military (OBSOLETE).................–55(cid:176) C to 125(cid:176) C PACKAGE/ORDER IUNFORWMATIOUN BOTTOM VIEW ORDER PART NUMBER ORDER PART NUMBER 1.2V LT1034BCH-1.2 7V LT1034BCH-2.5 LT1034CS8-1.2 TOP VIEW LT1034BMH-1.2 LT1034CS8-2.5 LT1034BMH-2.5 NC 1 8 2.5V LT1034IS8-1.2 H PACKAGE LT1034CH-1.2 NC 2 7 NC LT1034IS8-2.5 3-LEAD TO-46 METAL CAN TJMAX = 150(cid:176)C, q JA = 440(cid:176)C/W, LT1034CH-2.5 NC 3 6 2.5V q JC = 80(cid:176)C/W LT1034MH-1.2 GND 4 5 7V PART MARKING LT1034MH-2.5 S8 PACKAGE 3401 8-LEAD PLASTIC SO OBSOLETE PACKAGE 3402 1034I12 Consider the Z Package for Alternate Source TJMAX = 175(cid:176)C, q JA = 150(cid:176)C/W 34I02 ORDER PART NUMBER BOTTOM VIEW LT1034BCZ-1.2 1.2V LT1034BCZ-2.5 7V LT1034BIZ-1.2 LT1034BIZ-2.5 LT1034CZ-1.2 Z PACKAGE LT1034CZ-2.5 3-LEAD TO-92 PLASTIC LT1034IZ-1.2 TJMAX = 100(cid:176)C, q JA = 160(cid:176)C/W LT1034IZ-2.5 Consult LTC Marketing for parts specified with wider operating temperature ranges. 1034fe 2

LT1034-1.2/LT1034-2.5 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25(cid:176) C. A LT1034-1.2 LT1034-2.5 PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Reverse Breakdown Voltage I = 100m A 1.210 1.225 1.240 2.46 2.5 2.54 V R l 1.205 1.225 1.245 2.43 2.5 2.57 V Reverse Breakdown Change (Note 4) 0.5 2.0 1.0 3.0 mV with Current l 1.0 4.0 1.5 6.0 mV 2mA £ I £ 20mA 4.0 8.0 6.0 16.0 mV R l 6.0 15.0 10.0 20.0 mV Minimum Operating Current l 10 20 15 30 m A Temperature Coefficient I = 100m A LT1034B l 10 20 10 20 ppm/(cid:176) C R LT1034 20 40 20 40 ppm/(cid:176) C Reverse Dynamic Impedance (Note 3) I = 100m A 0.25 1.0 0.5 1.5 W R l 0.50 2.0 1.0 2.5 W Low Frequency Noise I = 100m A, 0.1Hz £ F £ 10Hz l 4 6 m V R P-P Long-Term Stability I = 100m A 20 20 ppm/(cid:214) khrs R The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25(cid:176) C. A 7V Reference. PARAMETER CONDITIONS MIN TYP MAX UNITS Reverse Breakdown Voltage I = 100m A 6.80 7.0 7.3 V R l 6.75 7.0 7.4 V Reverse Breakdown Change 100m A £ I £ 1mA 90 140 mV R with Current 100m A £ I £ 1mA l 100 190 mV R 1mA £ I £ 20mA 160 250 mV R 1mA £ I £ 20mA l 200 350 mV R Temperature Coefficient I = 100m A l 40 ppm/(cid:176) C R Long-Term Stability I = 100m A 20 ppm/(cid:214) khrs R Note 1: Absolute Maximum Ratings are those values beyond which the life Note 3: This parameter guaranteed by “reverse breakdown change with of a device may be impaired. current” test. Note 2: Forward biasing either diode will affect the operation of the other Note 4: For the LT1034-1.2: 20m A £ I £ 2mA. For the LT1034-2.5: R diode. 30m A £ I £ 2mA. R 1034fe 3

LT1034-1.2/LT1034-2.5 TYPICAL PERFORWMANUCE CHARACTERISTICS Reverse Voltage Change 1.2V Reverse Voltage Change 7V 0.1Hz to 10Hz Noise 1.2V 8 0.4 11 TA = –55°C TO 125°C TA = 25°C 10 mV) 6 V) 0.3 8 E ( 1.2V GE( 7V 6 G N N A 4 A H TAGE CH 4 LTAGE C 0.2 µV/DIV 02 OL 2 VO 0.1 2 –2 E V SE –4 S R R E –6 VE 0 EV 0 E R –8 R –10 –2 –0.1 –11 0.01 0.1 1 10 100 0.1 1 10 100 0 1 2 3 4 5 6 7 8 9 10 11 12 REVERSE CURRENT (mA) 1s/DIV REVERSE CURRENT (mA) LT1034 • TPC01 LT1034 • TPC02 LT1034 • TPC03 Reverse Dynamic Impedance 1.2V Reverse Dynamic Impedance 2.5V Reverse Dynamic Impedance 7V 100 60 100 ΩMPEDANCE () 10 1fT .A=2 =V2 52H5z°C WMPEDANCE () 5400 IZ = 100m A ΩMPEDANCE () 10 ITZA = = 1 2050°µCA MIC I MIC I 30 MIC I 1.2V REVERSE DYNA 1 REVERSE DYNA 2100 REVERSE DYNA 1 0.1 0 0.1 0.01 0.1 1 10 100 0.01 0.1 1 10 100 10 100 1k 10k 100k REVERSE CURRENT (mA) FREQUENCY (Hz) FREQUENCY (kHz) LT1034 • TPC04 LT1034 • TPC05 LT1034 • TPC06 1034fe 4

LT1034-1.2/LT1034-2.5 TYPICAL PERFORWMANUCE CHARACTERISTICS Reverse Characteristics 1.2V Reverse Characteristics 2.5V Reverse Characteristics 7V 16 100 100 TA = –55°C TO 125°C TA = –55°C TO 125°C VREF = 1.2V VREF = 7V 80 A) 12 A) 10 A) µ m µ REVERSE CURRENT ( 84 REVERSE CURRENT ( 0.11 REVERSE CURRENT ( 6400 20 0 0.01 0 0 0.4 0.8 1.2 1.6 2.490 2.495 2.500 2.505 2.510 0 1 2 3 4 5 6 7 8 9 10 REVERSE VOLTAGE (V) REVERSE VOLTAGE (V) REVERSE VOLTAGE (V) LT1034 • TPC07 LT1034 • TPC02 LT1034 • TPC09 Forward Characteristics Response Time Response Time 1.2 TA = 25°C 8 OUTPUT V) 6 1.5 OUTPUT E ( 0.8 82k AG V) 4 VIN VOUT V)1.0 36k WARD VOLT 0.4 VOLTAGE ( 20 7V VOLTAGE (0.50 VIN 1V.2OVUT R O F INPUT INPUT 15 5 0 0 0 0.01 0.1 1 10 100 0 20 40 60 80 0 100 200 300 400 TIME (µs) TIME (µs) FORWARD CURRENT (mA) LT1034 • TPC10 LT1180A • TPC11 LT1180A • TPC12 1034fe 5

LT1034-1.2/LT1034-2.5 PACKAGE DESCRIPTIOU H Package 8-Lead TO-5 Metal Can (.200 Inch PCD) (Reference LTC DWG # 05-08-1320) 0.209 – 0.219 (5.309 – 5.537) 0.100 (04..157281 –– 04..199553) (02..018559 –– 02..160657) (01..025700) (2T.5Y4P0) 0.050 0.500 TYP (1T.2Y7P0) (12.700) PIN 1 MIN REFERENCE PLANE FOR 3-LEAD PACKAGE ONLY * 0.025 45° (0.635) 0.036 – 0.046 0.028 – 0.048 MAX (0.914 – 1.168) (0.711 – 1.219) 0.016 – 0.021** (0.406 – 0.533) H02/03(TO-46) 1098 DIA *LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE AND 0.045" BELOW THE REFERENCE PLANE 0.016 – 0.024 **FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS (0.406 – 0.610) OBSOLETE PACKAGE S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) 0.189 – 0.197* (4.801 – 5.004) 8 7 6 5 0.228 – 0.244 0.150 – 0.157** (5.791 – 6.197) (3.810 – 3.988) SO8 1298 1 2 3 4 0.010 – 0.020 · 45(cid:176) 0.053 – 0.069 (0.254 – 0.508) (1.346 – 1.752) 0.004 – 0.010 0.008 – 0.010 (0.203 – 0.254) 0°– 8° TYP (0.101 – 0.254) 0.016 – 0.050 0.014 – 0.019 0.050 (0.406 – 1.270) (0.355 – 0.483) (1.270) TYP BSC *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 1034fe 6

LT1034-1.2/LT1034-2.5 PACKAGE DESCRIPTIOU Z Package 3-Lead Plastic TO-92 (Similar to TO-226) (Reference LTC DWG # 05-08-1410) 0.180 – 0.005 0.060 – 0.005 (4.572 – 0.127) (1.524– 0.127) DIA 0.90 (2.286) NOM 0.180 – 0.005 (4.572 – 0.127) 5° NOM 0.500 0.050 UNCONTROLLED (12.70) (1.270)LEAD DIMENSION MIN MAX 0.016 – 0.003 0.015 – 0.002 0.050 (0.406 – 0.076) (0.381 – 0.051) (1.27) BSC 0.098 +016/–0.04 Z3 (TO-92) 0401 0.060 – 0.010 (2.5 +0.4/–0.1) (1.524 – 0.254) 2 PLCS TO-92 TAPE AND REEL REFER TO TAPE AND REEL SECTION OF 0.140 – 0.010 LTC DATA BOOK FOR ADDITIONAL INFORMATION (3.556 – 0.127) 10° NOM 1034fe Information furnished by Linear Technology Corporation is believed to be accurate and reliable. 7 However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

LT1034-1.2/LT1034-2.5 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1004 Low Cost Precision Band-Gap Micropower, SO-8, Industrial Temperature Options LT1019 Precision Series or Shunt Band-Gap Low Dropout, Multiple Output Options LT1236 Precision Series or Shunt Buried Zener Low Noise, Low Power, Multiple Output Options 1034fe 8 Linear Technology Corporation LT/CPI 0102 1.5K REV E • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 l FAX: (408) 434-0507 l www.linear.com ª LINEAR TECHNOLOGY CORPORATION 1995

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: A nalog Devices Inc.: LT1034BCZ-2.5#PBF LT1034IZ-1.2#TR LT1034CZ-1.2#PBF LT1034IZ-2.5#PBF LT1034IS8-1.2 LT1034BIZ- 2.5#TRPBF LT1034IS8-1.2#TRPBF LT1034IS8-2.5#TR LT1034BIZ-1.2 LT1034BIZ-1.2#TRPBF LT1034CS8-1.2#TR LT1034IZ-2.5#TR LT1034CZ-2.5 LT1034IS8-2.5 LT1034BCZ-2.5#TR LT1034CZ-1.2#TR LT1034BIZ-1.2#PBF LT1034BIZ-2.5 LT1034CS8-1.2 LT1034CZ-2.5#PBF LT1034BCZ-1.2#TR LT1034IS8-2.5#TRPBF LT1034CS8- 1.2#TRPBF LT1034CZ-1.2#TRPBF LT1034BIZ-1.2#TR LT1034BCZ-1.2 LT1034IZ-1.2 LT1034IS8-2.5#PBF LT1034CS8-2.5 LT1034BIZ-2.5#PBF LT1034IZ-1.2#TRPBF LT1034BCZ-1.2#PBF LT1034BCZ-2.5 LT1034CZ- 2.5#TRPBF LT1034CS8-1.2#PBF LT1034CS8-2.5#TRPBF LT1034IS8-1.2#PBF LT1034IZ-2.5 LT1034IZ-2.5#TRPBF LT1034BCZ-2.5#TRPBF LT1034IS8-1.2#TR LT1034CZ-1.2 LT1034IZ-1.2#PBF LT1034BCZ-1.2#TRPBF LT1034CS8-2.5#PBF LT1034CS8-2.5#TR LT1034CZ-2.5#TR LT1034BIZ-2.5#TR