LM185H-2.5

LM185-2.5 LINER | Alldatasheet

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LM185-2.5/ APPLICATIO SU DESCRIPTIO UFEATURES TYPICAL APPLICATIO U Micropower Voltage Reference n Portable Meter References n Portable Test Instruments n Battery-Operated Systems n Panel Meters n Current Loop Instrumentation n 20mA to 20mA Operating Range n Guaranteed 1% Initial Voltage Tolerance n Guaranteed 1W Dynamic Impedance n Very Low Power Consumption The LM185-2.5 is a two-terminal band gap reference diode that has been designed for applications which require precision performance with micropower opera- tion. The device provides guaranteed operation specifica- tions at currents as low as 20mA. The nominal voltage is 2.5V with both 1% and 2% tolerances available. Some additional features are: maximum dynamic impedance of 1W , low noise and excellent stability over time and tem- perature. The advanced design, processing and testing techniques make Linear’s LM185-2.5 a superior choice over previous designs. A circuit for cold junction compen- sation of a thermocouple is shown below. For applications requiring guaranteed temperature drift, see the LT1034 data sheet. REVERSE CURRENT (mA) OUTPUT VOLTAGE CHANGE (mV) 0.01 1 10 100 LM185-2.5 TA02 0.1 Reverse Voltage ChangeThermocouple Cold Junction Compensator RSET 450W VIN 10k ADJUST FOR 12.17mV AT 25°C ACROSS 450W V 16k 950W LM385-2.5 100k W.W. ZERO

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CELLS 2.6V METER –TYPE K LM185-2.5 TA01 IQ » 50mA LM334 , LTC and LT are registered trademarks of Linear Technology Corporation.

LM185-2.5/ Operating Temperature Range A UGWA WU WARBSOLUTEX I T I S Storage Temperature Range WU UPACKAGE/ORDER I FOR ATIO LM185H-2.5 LM285H-2.5 LM385H-2.5 LM385BH-2.5 (NOTE 3) LM285Z-2.5 LM385Z-2.5 LM385BZ-2.5 (NOTE 3) S8 PART MARKING 2852 3852 3852B LM285S8-2.5 LM385S8-2.5 LM385BS8-2.5 ORDER PART NUMBER ORDER PART NUMBER ORDER PART NUMBERBOTTOM VIEW Z PACKAGE 3-LEAD TO-92 PLASTIC BOTTOM VIEW H PACKAGE 2-LEAD TO-46 METAL CAN TOP VIEW NC NC NC (DO NOT USE) NC S8 PACKAGE 8-LEAD PLASTIC SO NC OBSOLETE PACKAGE TJMAX = 150°C, qJA = 440°C/W, qJC = 80°C/W TJMAX = 150°C, qJA = 220°C/W TJMAX = 100°C, qJA = 160°C/W Consult LTC Marketing for parts specified with wider operating temperature ranges. (Note 1) Consider the S8 or Z Packages for Alternate Source

LM185-2.5/ ELECTRICAL C CHARA TERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS VZ Reverse Breakdown Voltage T A = 25°C, 20mA £ IR £ 20mA LM385-2.5 2.425 2.500 2.575 V LM385B-2.5 (Note 3) 2.462 2.500 2.538 V DVZ Average Temperature Coefficient 20 mA £ IR £ 20mA (Note 3) 20 20 ppm/ °C DTemp IMIN Minimum Operating Current T MIN £ TA £ TMAX l 82 0 8 2 0 mA DVZ Reverse Breakdown Voltage 20 mA £ IR £ 1mA DIR Change With Current T A = 25°C 1.0 2.0 mV TMIN £ TA £ TMAX l 1.5 2.5 mV 1mA £ IR £ 20mA TA = 25°C1 0 2 0 m V TMIN £ TA £ TMAX l 20 25 mV rZ Reverse Dynamic Impedance I R = 100mA (Note 4) TA = 25°C 0.2 0.6 0.4 1.0 W TMIN £ TA £ TMAX l 1.5 1.5 W en Wide Band Noise (RMS) 10Hz £ f £ 10kHz, IR = 100mA 120 120 mV DVZ Long Term Stability T A = 25°C – 0.1°C, IR = 100mA 20 20 ppm/kHr DTime Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: All specifications are for TA = 25°C unless otherwise noted. For the LM185-2.5 TMIN = –55 °C and TMAX = 125°C. For LM285-2.5, TMIN = – 40°C and TMAX = 85°C. For LM385-2.5, TMIN = 0°C and TMAX = 70°C. Note 3: For very low initial tolerance, consult LT1004 data sheet. The LT1004 is a low cost, pin for pin substitution device. For guaranteed temperature coefficient consult the LT1034-2.5 data sheet. Note 4: Guaranteed but not tested. The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 2)

LM185-2.5/ CCHARA TERISTICSUWATYPICALP E RFOR CE Reverse Characteristics Forward Characteristics Temperature Drift FORWARD CURRENT (mA) 0.4 FORWARD VOLTAGE (V) 0.8 1.2 1.6 0.01 1 10 100 LM185-2.5 • TPC02 0.1 TA = 25°C TEMPERATURE (°C) –55

2.480 REFERENCE VOLTAGE (V)

2.485 2.495 2.500 2.505 2.515 –15 25 45 125 LM185-2.5 • TPC03 2.490 2.520 2.525 2.510 –35 5 65 85 105 Reverse Dynamic Impedance Reverse Dynamic Impedance Noise Voltage FREQUENCY (Hz) DYNAMIC IMPEDANCE (W ) 100 10k 100k LM185-2.5 • TPC05 0.1 100 1k 10k 1M TA = 25°C IR = 100mA FREQUENCY (Hz) 600 800 1000 1200 1400 10 1k 10k 100k LM185-2.5M • TPC06 100 400

200 NOISE (nV/ÖHz)

CUTOFF FREQUENCY (Hz) 100 INTEGRATED NOISE (mVRMS) 100 120 100k1k 10k LM185-2.5 • TPC07 100mA R C RC LOW PASS TIME (mS) 2.0 3.0 LM185-2.5 • TPC08 1.0 0 500 4.0 VOLTAGE (V) 100 VOUTVIN 24k OUTPUT INPUT REVERSE CURRENT (mA) DYNAMIC IMPEDANCE (W ) 100 1000 0.01 1 10 100 LM185-2.5 • TPC05 0.1 0.1 f = 25Hz –55 °C TO 125°C REVERSE VOLTAGE (V) 0.1 REVERSE CURRENT (mA) 100 0.5 1.0 1.5 2.0 LM185-2.5 • TPC01 2.5 3.0 –55 °C TO 125°C Filtered Output Noise Response Time

LM185-2.5/ S WA WCHE TI ICDA G R A 100k 20pF 7.5k 500W 60k 20pF 600k Q11 Q13 200k 50k 300k Q14 500k 500k Q10 LM185-2.5 SD01 Q3 Q7 Q12 UPACKAGE DESCRIPTIO OBSOLETE PACKAGE H Package 2-Lead and 3-Lead TO-46 Metal Can (Reference LTC DWG # 05-08-1340) 0.016 – 0.021** (0.406 – 0.533) DIA 0.025 (0.635) MAX 0.085 – 0.105 (2.159 – 2.667) 0.500 (12.700) MIN 0.178 – 0.195 (4.521 – 4.953) 0.209 – 0.219 (5.309 – 5.537) 0.100 (2.540) TYP 45° H02/03(TO-46) 1098 0.050 (1.270) TYP 0.050 (1.270) TYP 0.028 – 0.048 (0.711 – 1.219) 0.036 – 0.046 (0.914 – 1.168) FOR 3-LEAD PACKAGE ONLY REFERENCE PLANE * LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE AND 0.045" BELOW THE REFERENCE PLANE FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS 0.016 – 0.024 (0.406 – 0.610) PIN 1

LM185-2.5/ 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) UPACKAGE DESCRIPTIO 0.016 – 0.050 (0.406 – 1.270) 0.010 – 0.020 0°– 8° TYP 0.008 – 0.010 (0.203 – 0.254) SO8 1298 0.053 – 0.069 (1.346 – 1.752) 0.014 – 0.019 (0.355 – 0.483) TYP 0.004 – 0.010 (0.101 – 0.254) 0.050 (1.270) BSC 1 2 3 4 0.150 – 0.157** (3.810 – 3.988) 8 7 6 5 0.189 – 0.197* (4.801 – 5.004) 0.228 – 0.244 (5.791 – 6.197) 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

LM185-2.5/ Z Package 3-Lead Plastic TO-92 (Similar to TO-226) (Reference LTC DWG # 05-08-1410) 0.050 (1.27) BSC 0.060 – 0.005 (1.524– 0.127) DIA 0.90 (2.286) NOM 0.180 – 0.005 (4.572 – 0.127) 0.180 – 0.005 (4.572 – 0.127) 0.500 (12.70) MIN 0.050 (1.270) MAX UNCONTROLLED LEAD DIMENSION 0.016 – 0.003 (0.406 – 0.076) NOM 0.015 – 0.002 (0.381 – 0.051) 0.060 – 0.010 (1.524 – 0.254) 10° NOM 0.140 – 0.010 (3.556 – 0.127) Z3 (TO-92) 0401 0.098 +016/–0.04 (2.5 +0.4/–0.1)

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REFER TO TAPE AND REEL SECTION OF LTC DATA BOOK FOR ADDITIONAL INFORMATION UPACKAGE DESCRIPTIO 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 represen- tation that the interconnection of circuits as described herein will not infringe on existing patent rights.

LM185-2.5/ ª LINEAR TECHNOLOGY CORPORATION 1 992 185fc LT/CP 0801 1.5K REV C • PRINTED IN USA 220k 2.5V LM385-2.5 REFERENCE FROM A 9V BATTERY 2.7k 2.5V LM385-2.5 OPERATION OVER A WIDE SUPPLY RANGE R 3.7V £ V+ £ 30V LM185-2.5 TA03 LM334 USA OPPLICATITYPICAL Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 l FAX: (408) 434-0507 l www.linear.com RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1634 Micropower Shunt Voltage Reference 0.05% Initial Accuracy, 10ppm/ °C Maximum Tempco Output Voltage: 1.25V, 2.5V, 4.096V and 5V