LT1034-1.2/LT1034-2.5 Micropower Dual Reference U DESCRIPTION FEATURES ■ ■ ■ ■ ■ Guaranteed 20 ppm/°C Drift (H Package and Z Package) Guaranteed 40 ppm/°C Drift (SO-8 Package) 20µA to 20mA Operation (1.2V) Dynamic Impedance: 1Ω 7V, 100µA Reference U APPLICATIONS ■ ■ ■ Portable Meters Precision Regulators Calibrators The LT ®1034 is a micropower, precision 1.2V/2.5 reference combined with a 7V auxiliary reference. The 1.2V/2.5V reference is a trimmed, thin-film, band-gap, voltage reference with 1% initial tolerance and guaranteed 20ppm/°C temperature drift. Operating on only 20µA, the LT1034 offers guaranteed drift, low temperature cycling hysteresis and good long-term stability. The low dynamic impedance makes the LT1034 easy to use from unregulated supplies. The 7V reference is a subsurface zener device for less demanding applications. 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. W U U TYPICAL APPLICATION AND BLOCK DIAGRAM Temperature Drift LT1034CS8-1.2 15V 2.5 50k 500k 1.2V OR 2.5V OUTPUT 7V OUTPUT 7V 1.225V OR 2.500V REVERSE VOLTAGE CHANGE (mV) 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 LT1034 • TA01 –2.5 –50 –25 50 25 0 75 TEMPERATURE (°C) 100 125 LT1034 • TPC02 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 1 LT1034-1.2/LT1034-2.5 U W W W ABSOLUTE MAXIMUM RATINGS Operating Current ................................................. 20mA Forward Current (Note 1)...................................... 20mA Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C Operating Temperature Commercial ............................................. 0° to 70°C Industrial .......................................... – 40°C to 85°C Military ........................................... – 55°C to 125°C U W U PACKAGE/ORDER INFORMATION BOTTOM VIEW 1.2V 7V H PACKAGE 3-LEAD TO-46 METAL CAN TJMAX = 150°C, θJA = 440°C/ W, θJC = 80°C/ W BOTTOM VIEW 1.2V 7V Z PACKAGE 3-LEAD TO-92 PLASTIC TJMAX = 100°C, θJA = 160°C/ W ORDER PART NUMBER ORDER PART NUMBER LT1034BCH-1.2 LT1034BCH-2.5 LT1034BMH-1.2 LT1034BMH-2.5 LT1034CH-1.2 LT1034CH-2.5 LT1034MH-1.2 LT1034MH-2.5 NC 1 8 2.5V NC 2 7 NC NC 3 6 2.5V GND 4 5 7V PART MARKING 3401 3402 34I01 34I02 S8 PACKAGE 8-LEAD PLASTIC SO ORDER PART NUMBER TJMAX = 175°C, θJA = 150°C/ W LT1034BCZ-1.2 LT1034BCZ-2.5 LT1034BIZ-1.2 LT1034BIZ-2.5 LT1034CZ-1.2 LT1034CZ-2.5 LT1034IZ-1.2 LT1034IZ-2.5 ELECTRICAL CHARACTERISTICS PARAMETER Reverse Breakdown Voltage CONDITIONS IR = 100µA Reverse Breakdown Change with Current Note 3 TA = 25°C, unless otherwise specified. ● ● 2mA ≤ IR ≤ 20mA ● Minimum Operating Current Temperature Coefficient IR = 100µA Reverse Dynamic Impedance (Note 2) IR = 100µA Low Frequency Noise Long-Term Stability IR = 100µA, 0.1Hz ≤ F ≤ 10Hz IR = 100µA ● LT1034B LT1034 ● ● 2 LT1034CS8-1.2 LT1034CS8-2.5 LT1034IS8-1.2 LT1034IS8-2.5 TOP VIEW ● LT1034-1.2 MIN TYP MAX 1.210 1.225 1.240 1.205 1.225 1.245 0.5 2.0 1.0 4.0 4.0 8.0 6.0 15.0 10 20 10 20 20 40 0.25 1.0 0.50 2.0 4 20 MIN 2.46 2.43 LT1034-2.5 TYP MAX 2.5 2.54 2.5 2.57 1.0 3.0 1.5 6.0 6.0 16.0 10.0 20.0 15 30 10 20 20 40 0.5 1.5 1.0 2.5 6 20 UNITS V V mV mV mV mV µA ppm/°C ppm/°C Ω Ω µVP-P ppm√khrs LT1034-1.2/LT1034-2.5 ELECTRICAL CHARACTERISTICS PARAMETER Reverse Breakdown Voltage CONDITIONS IR = 100µA Reverse Breakdown Change with Current 100µA ≤ IR ≤ 1mA 100µA ≤ IR ≤ 1mA 1mA ≤ IR ≤ 20mA 1mA ≤ IR ≤ 20mA IR = 100µA IR = 100µA 7V Reference. TA = 25°C, unless otherwise specified. MIN 6.80 6.75 ● Temperature Coefficient Long-Term Stability TYP 7.0 7.0 90 100 160 200 40 20 ● ● ● The ● denotes specifications which apply over the full operating temperature range. Note 1: Forward biasing either diode will affect the operation of the other diode. MAX 7.3 7.4 140 190 250 350 UNITS V V mV mV mV mV ppm/°C ppm√khrs Note 2: This parameter guaranteed by “reverse breakdown change with current” test. Note 3: For the LT1034-1.2: 20µA ≤ IR ≤ 2mA. For the LT1034-2.5: 30µA ≤ IR ≤ 2mA. U W TYPICAL PERFORMANCE CHARACTERISTICS Reverse Voltage Change 1.2V Reverse Voltage Change 7V 8 TA = –55°C TO 125°C 10 TA = 25°C 6 1.2V 4 2 0 8 0.3 7V 6 4 0.2 2µV/DIV REVERSE VOLTAGE CHANGE(V) REVERSE VOLTAGE CHANGE (mV) 0.1Hz to 10Hz Noise 1.2V 11 0.4 0.1 2 0 –2 –4 –6 0 –8 –10 –2 0.01 0.1 1 10 REVERSE CURRENT (mA) –0.1 100 10 –11 100 0 0.1 0.01 0.1 1 10 REVERSE CURRENT (mA) 100 6 7 1s/DIV 8 9 50 40 30 20 10 0 0.01 10 11 12 0.1 1 10 100 TA = 25°C IZ = 100µA 10 1.2V 1 0.1 10 FREQUENCY (kHz) LT1034 • TPC04 5 100 IZ = 100µA REVERSE DYNAMIC IMPEDANCE (Ω) REVERSE DYNAMIC IMPEDANCE (Ω) 1 4 Reverse Dynamic Impedance 7V 60 10 3 LT1034 • TPC03 Reverse Dynamic Impedance 2.5V 100 1.2V 2 LT1034 • TPC02 Reverse Dynamic Impedance 1.2V TA = 25°C f = 25Hz 1 REVERSE CURRENT (mA) LT1034 • TPC01 REVERSE DYNAMIC IMPEDANCE (Ω) 1 0.1 LT1034 • TPC05 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. 100 1k 10k FREQUENCY (Hz) 100k LT1034 • TPC06 3 LT1034-1.2/LT1034-2.5 U W TYPICAL PERFORMANCE CHARACTERISTICS Reverse Characteristics 1.2V Reverse Characteristics 2.5V Reverse Characteristics 7V 100 16 100 12 8 4 REVERSE CURRENT (µA) REVERSE CURRENT (mA) REVERSE CURRENT (µA) TA = –55°C TO 125°C VREF = 1.2V 10 1 0.1 TA = –55°C TO 125°C VREF = 7V 80 60 40 20 0 0.8 0.4 1.2 REVERSE VOLTAGE (V) 0 0.01 2.490 1.6 2.500 2.495 2.505 0 2.510 0 1 2 REVERSE VOLTAGE (V) 3 4 5 6 7 8 REVERSE VOLTAGE (V) Forward Characteristics 10 LT1034 • TPC09 LT1034 • TPC02 LT1034 • TPC07 9 Response Time Response Time 1.2 8 OUTPUT 6 1.5 OUTPUT 82k 4 VIN VOUT VOLTAGE (V) 0.8 VOLTAGE (V) FORWARD VOLTAGE (V) TA = 25°C 7V 2 0 1.0 36k VIN VOUT 0.5 1.2V 0 0.4 INPUT 15 0 0 0.01 0.1 1 10 0 100 0 40 20 TIME (µs) FORWARD CURRENT (mA) LT1034 • TPC10 U 0.178 – 0.195 (4.521 – 4.953) 0.050 (1.270) TYP 0.085 – 0.105 (2.159 – 2.667) 0.100 (2.540) TYP 400 LT1180A • TPC12 0.060 ± 0.005 (1.524± 0.127) DIA 0.050 (1.270) TYP 0.180 ± 0.005 (4.572 ± 0.127) 45° 0.180 ± 0.005 (4.572 ± 0.127) 0.90 (2.286) NOM 0.028 – 0.048 (0.711 – 1.219) 5° NOM H3(46) 0594 0.053 – 0.069 (1.346 – 1.752) 0°– 8° TYP 0.014 – 0.019 (0.355 – 0.483) 0.004 – 0.010 (0.101 – 0.254) 0.050 (1.270) BSC 0.500 (12.70) MIN 0.189 – 0.197* (4.801 – 5.004) S8 Package 8-Lead Plastic SO 8 7 6 5 0.020 ± 0.003 (0.508 ± 0.076) 0.150 – 0.157* (3.810 – 3.988) 0.228 – 0.244 (5.791 – 6.197) 0.050 UNCONTROLLED (1.270) LEAD DIA MAX 0.050 ± 0.005 (1.270 ± 0.127) 0.016 ± 0.03 (0.406 ± 0.076) 0.015 ± 0.02 (0.381 ± 0.051) 0.060 ± 0.010 (1.524 ± 0.254) 0.140 ± 0.010 (3.556 ± 0.127) SO8 0294 *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm). 4 300 Z Package Plastic 0.036 – 0.046 (0.914 – 1.168) 0.016 – 0.019 (0.406 – 0.483) DIA 0.016 – 0.050 0.406 – 1.270 200 100 TIME (µs) Dimension in inches (millimeters) unless otherwise noted. FOR 3-LEAD PACKAGE ONLY 0.025 (0.635) MAX 0.008 – 0.010 (0.203 – 0.254) 0 80 H Package Metal Can 0.015 0.500 (0.381) (12.700) MAX MIN 0.010 – 0.020 × 45° (0.254 – 0.508) 60 LT1180A • TPC11 PACKAGE DESCRIPTION 0.209 – 0.219 (5.309 – 5.537) INPUT 5 Linear Technology Corporation 1 2 3 4 10° NOM Z3 0694 LT/GP 0995 2K REV D • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● TELEX: 499-3977 LINEAR TECHNOLOGY CORPORATION 1995