LT1004 Micropower Voltage Reference U DESCRIPTION FEATURES ■ ■ ■ ■ ■ ■ Guaranteed ±4mV Initial Accuracy LT1004-1.2 Guaranteed ±20mV Accuracy LT1004-2.5 Guaranteed 10µA Operating Current Guaranteed Temperature Performance Operates up to 20mA Very Low Dynamic Impedance U APPLICATIONS ■ ■ ■ ■ Portable Meter References Portable Test Instruments Battery-Operated Systems Current Loop Instrumentation The LT®1004 Micropower Voltage Reference is a 2-terminal bandgap reference diode designed to provide high accuracy and excellent temperature characteristics at very low operating currents. Optimization of the key parameters in the design, processing and testing of the device results in accuracy specifications previously attainable only with selected units. Below is a distribution plot of reference voltage for a typical lot of LT1004-1.2. Virtually all of the units fall well within the prescribed limits of ±4mV. The LT1004 is a pin-for-pin replacement for the LM185/LM385 series of references with improved accuracy specifications. More important, the LT1004 is an attractive device for use in systems where accuracy was previously obtained at the expense of power consumption and trimming. For a low drift micropower reference with guaranteed temperature coefficient, see the LT1034 data sheet. , LTC and LT are registered trademarks of Linear Technology Corporation. U TYPICAL APPLICATION Typical Distribution of Reference Voltage (LT1004-1.2) Micropower Cold Junction Compensation for Thermocouples 200 160 1684Ω 5k AT 25°C † + LT1004-1.2 186Ω 120 100 80 60 40 1.2375 1.237 1.2365 1.236 1.2355 1.235 COMPENSATES WITHIN ±1°C FROM 0°C TO 60°C 20 1.2345 * QUIESCENT CURRENT ≅ 15µA † YELLOW SPRINGS INST. CO. PART #44007 1.234 – 1.2335 R 1 233k 299k 300k 2.1M 140 1.233 + – 1.8k NUMBER OF PARTS R1 3V LITHIUM THERMOCOUPLE TYPE J K T S 1200 PARTS TA = 25°C 180 1.2325 100k * 1004 TA02 1004 TA01 1 LT1004 W U U PACKAGE/ORDER INFORMATION W W W (Note 1) Reverse Breakdown Current ................................. 30mA Forward Current................................................... 10mA Operating Temperature Range LT1004M ......................................... – 55°C to 125°C LT1004I ............................................. – 40°C to 85°C LT1004C ................................................. 0°C to 70°C Storage Temperature Range ................ – 65°C to 150°C Lead Temperature (Soldering, 10 sec.)................ 300°C ORDER PART NUMBER BOTTOM VIEW 1 2 TJMAX = 150°C θJA = 440°C/ W θJC = 80°C/ W H PACKAGE 2-LEAD TO-46 METAL CAN 3 2 1 Z PACKAGE 3-LEAD PLASTIC TO-92 TOP VIEW NC 1 8 VOUT NC 2 7 NC NC 3 6 VOUT S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 100°C, θJA = 150°C/ W ∆VZ ∆Temp Average Temperature Coefficient IMIN Minimum Operating Current ∆VZ ∆IR Reverse Breakdown Voltage Change with Current Reverse Dynamic Impedance CONDITIONS IR = 100µA LT1004M: – 55°C ≤ TA ≤ 125°C LT1004C: 0°C ≤ TA ≤ 70°C LT1004I: – 40°C ≤ TA ≤ 85°C ● ● ● IMIN ≤ IR ≤ 20mA (Note 3) LT1004-1.2 MIN TYP MAX 1.231 1.235 1.239 1.220 1.230 1.245 1.225 1.235 1.245 1.220 1.230 1.245 50 ● 8 IMIN ≤ IR ≤ 1mA ∆VZ ∆Time Wide Band Noise (RMS) Long Term Stability LT1004-2.5 TYP MAX 2.500 2.520 2.500 2.535 2.500 2.530 2.500 2.530 50 10 12 UNITS V V V V ppm/°C 20 µA 1.0 1.5 1.0 1.5 mV mV ● 10 20 10 20 mV mV 0.6 1.5 Ω Ω IR = 100µA 0.2 0.6 1.5 0.2 IR = 100µA 10Hz ≤ f ≤ 10kHz 60 120 IR = 100µA TA = 25°C ± 0.1°C 20 20 The ● denotes the specifications which apply over the full operating temperature range. 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. 2 MIN 2.480 2.460 2.470 2.460 ● ● en S8 PART MARKING 0412 0425 0412I 0425I (Note 2) 1mA ≤ IR ≤ 20mA rZ LT1004CZ-1.2 LT1004CZ-2.5 LT1004IZ-1.2 LT1004IZ-2.5 LT1004CS8-1.2 LT1004CS8-2.5 LT1004IS8-1.2 LT1004IS8-2.5 5 NC (DO NOT USE) GND 4 SYMBOL PARAMETER VZ Reverse Breakdown Voltage LT1004MH-1.2 LT1004MH-2.5 LT1004CH-1.2 LT1004CH-2.5 BOTTOM VIEW TJMAX = 100°C θJA = 160°C/ W ELECTRICAL CHARACTERISTICS U ABSOLUTE MAXIMUM RATINGS µV ppm/kHr Note 3: Selected devices with guaranteed maximum temperature coefficient are available upon request. For MIL-STD components, please refer to LTC 883C data sheet for test listing and parameters. LT1004 U W TYPICAL PERFORMANCE CHARACTERISTICS (1.2V) Reverse Characteristics 1.2 16 –55°C TO 125°C 1 0.1 0.2 0.4 0.6 0.8 1.0 REVERSE VOLTAGE (V) 1.2 12 FORWARD VOLTAGE (V) 10 0 TA = 25°C –55°C TO 125°C OUTPUT VOLTAGE CHANGE (mV) REVERSE CURRENT (µA) Forward Characteristics Reverse Voltage Change 100 8 4 0.4 0 –4 0.01 1.4 0.8 1 10 0.1 REVERSE CURRENT (mA) 0 0.01 100 Temperature Drift Reverse Dynamic Impedance Reverse Dynamic Impedance 100 1.245 10k –55°C TO 125°C f = 25Hz 1.230 TA = 25°C IR = 100µA DYNAMIC IMPEDANCE (Ω) DYNAMIC IMPEDANCE (Ω) REVERSE VOLTAGE (V) 1.235 100 1004 G11 1004 G02 1004 G01 1.240 0.1 1 10 FORWARD CURRENT (mA) 10 1 1k 100 10 1 1.225 0.1 0.01 –55 –35 –15 5 25 45 65 85 105 125 TEMPERATURE (°C) 0.1 1 10 REVERSE CURRENT (mA) 0.1 100 10 100 10k 1k FREQUENCY (Hz) 1004 G05 Reponse Time Filtered Output Noise 70 IR = 100µA IR = 100µA TA = 25°C 600 RC LOW PASS 60 50 NOISE (nV/√Hz) 500 400 300 40 100µA R 1.5 VOLTAGE (V) 700 NOISE (nV/√Hz) 1M 1004 G06 1004 G04 Noise Voltage 100k C 30 200 20 100 10 OUTPUT 1.0 36k 0.5 VOUT VIN 0 5V INPUT 0 10 100 1k 10k FREQUENCY (Hz) 100k 1004 G07 0 100 0 1k 10k FREQUENCY (Hz) 100k 1004 G08 0 100 TIME (µs) 500 600 1004 G09 3 LT1004 U W TYPICAL PERFORMANCE CHARACTERISTICS (2.5V) Reverse Characteristics Forward Characteristics 1.2 100 TA = 25°C FORWARD VOLTAGE (V) REVERSE CURRENT (µA) –55°C TO 125°C 10 1 0.1 0 0.5 1.0 1.5 2.0 REVERSE VOLTAGE (V) 2.5 0.8 0.4 0 0.01 3.0 0.1 1 10 FORWARD CURRENT (mA) 1004 G11 1004 G10 Temperature Drift Reverse Dynamic Impedance Reverse Dynamic Impedance 10k 1000 f = 25Hz –55°C TO 125°C 2.505 2.500 2.495 2.490 2.485 TA = 25°C IR = 100µA DYNAMIC IMPEDANCE (Ω) DYNAMIC IMPEDANCE (Ω) REFERENCE VOLTAGE (V) 2.515 2.510 100 100 10 1 1k 100 10 1 2.480 0.1 0.01 –55 –35 –15 5 25 45 65 85 105 125 TEMPERATURE (°C) 0.1 1 10 0.1 REVERSE CURRENT (mA) 100 10k 1k FREQUENCY (Hz) 100k 1004 G13 1004 G12 Noise Voltage 1M 1004 G14 Reponse Time Filtered Output Noise 120 1400 IR = 100µA IR = 100µA 1200 800 600 400 80 100µA R 3 RC LOW PASS VOLTAGE (V) INTEGRATED NOISE (µV) 100 1000 NOISE (nV/√Hz) 10 100 C 60 40 20 200 OUTPUT 2 1 VIN 24k VOUT 0 5V INPUT 0 10 100 1k 10k FREQUENCY (Hz) 100k 1004 G15 4 0 100 0 1k 10k CUTOFF FREQUENCY (Hz) 100k 1004 G16 100 TIME (µs) 500 1004 G17 LT1004 U TYPICAL APPLICATIONS Variable Output Supply High Stability 5V Regulator LT338A LT1338A VIN ≥ 8V IN VIN 5V OUT VIN + 300Ω 1% 1µF VOUT VOUT ADJ + ADJ 120Ω 1µF + 10µF LT1004-2.5 LT1004-1.2 100Ω 1% 1004 TA08 2k R1 1004 TA03 V – – 1V R1 ≤ 0.015 Constant Gain Amplifier Over Temperature V– Micropower 5V Reference V + ≥ 5V 250k 250k VIN 9V to 15V LM334 R OUTPUT 5.6k 3 INPUT 6 LM4250 2 2N3904 200k 7 + LT1004-1.2 – 4 LT1004-1.2 VOUT 5V 8 150pF 22M 3.01M 1% 1M 1% 60k V – ≤ –5V 1004 TA13 1004 TA07 Lead Acid Low Battery Detector Ground Referenced Current Source 15V BATTERY OUTPUT R1† 1% 1M 3 + LT1004-1.2 7 6 LM4250 133k 1% 2k* 12V 2 LT 1004-1.2 – LO = BATTERY LOW R 2 8 4 10M 7 – LT1007C 3 1004 TA14 + PER CELL FOR 1.8V/CELL IOUT 1004 TA04 1.235 R 2V R≈ IOUT + 10µA IOUT = 4 † R1 SETS TRIP POINT, 60.4k 6 –5V * MAY BE INCREASED FOR SMALL OUTPUT CURRENTS 5 LT1004 U TYPICAL APPLICATIONS VPP Generator for Eproms –– No Trim Required 1.2V Reference from 1.5V Battery 100pF 1.5V* 24V 24V 600µs RC PER INTEL SPEC 1 22k 3 12k 8 + 7 LM301A 2 0.05µF LT1004-1.2 – 3k 1.235V 21V OUT 6 LT1004-1.2 4 16.9k* 10k –5V *OUTPUT REGULATES DOWN TO 1.285V FOR I OUT = 0 2N3904 TTL INPUT 1.05k* 56k * 1% METAL FILM RESISTORS –5V Micropower Reference from 9V Battery 1004 TA15 2.5V Reference Low Noise Reference VIN ≥ 5V 5V 9V 1004 TA12 100µA 50k 510k 22Ω 2.500V 1.235V OUTPUT LT1004-2.5 LT1004-1.2 + LT1004-1.2 50µF 1004 TA10 1004 TA11 1004 TA09 SW W SCHE ATIC DIAGRA LT1004-1.2 LT1004-2.5 + 7.5k + 7.5k Q13 Q3 200k Q3 20pF 20pF Q12 Q4 Q12 Q4 Q13 200k 20pF Q11 20pF Q11 Q1 Q1 50k 50k 600k 600k Q10 Q10 300k 300k Q5 Q8 Q6 500k Q5 Q9 Q14 500Ω 500k – 1004-1.2 SD 6 Q9 Q14 Q8 Q6 60k 500k 500Ω 500k 60k – 1004-2.5 SD LT1004 U PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted. H Package 2-Lead and 3-Lead TO-46 Metal Can Z Package 3-Lead Plastic TO-92 (Similar to TO-226) (LTC DWG # 05-08-1340) (LTC DWG # 05-08-1410) 0.060 ± 0.010 (1.524 ± 0.254) 0.209 – 0.219 (5.309 – 5.537) 0.178 – 0.195 (4.521 – 4.953) 0.085 – 0.105 (2.159 – 2.667) 0.140 ± 0.010 (3.556 ± 0.127) 0.500 (12.700) MIN REFERENCE PLANE * 0.025 (0.635) MAX 0.016 – 0.019** (0.406 – 0.483) DIA 0.050 (1.270) TYP 0.100 (2.540) TYP 0.180 ± 0.005 (4.572 ± 0.127) 0.060 ± 0.005 (1.524± 0.127) DIA Z3 (TO-92) 0695 10° NOM 0.90 (2.286) NOM 0.180 ± 0.005 (4.572 ± 0.127) 0.050 (1.270) TYP PIN 1 FOR 3-LEAD PACKAGE ONLY 0.500 (12.70) MIN 5° NOM 0.050 UNCONTROLLED (1.270) LEAD DIMENSION MAX 45° 0.028 – 0.048 (0.711 – 1.219) 0.036 – 0.046 (0.914 – 1.168) *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) 0.015 ± 0.002 (0.381 ± 0.051) 0.016 ± 0.003 (0.406 ± 0.076) 0.050 ± 0.005 (1.270 ± 0.127) H02/03(TO-46) 1197 S8 Package 8-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.189 – 0.197* (4.801 – 5.004) 0.010 – 0.020 × 45° (0.254 – 0.508) 0.008 – 0.010 (0.203 – 0.254) 0.053 – 0.069 (1.346 – 1.752) 0°– 8° TYP 0.016 – 0.050 0.406 – 1.270 0.014 – 0.019 (0.355 – 0.483) *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 8 7 6 5 0.004 – 0.010 (0.101 – 0.254) 0.050 (1.270) TYP 0.150 – 0.157** (3.810 – 3.988) 0.228 – 0.244 (5.791 – 6.197) 1 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. 2 3 4 SO8 0996 7 LT1004 U TYPICAL APPLICATIONS 0°C to 100°C Linear Output Thermometer NETWORK DETAIL YSI 44201 BRN GRN 6250Ω RT NETWORK YSI 44201 15V 2.7k 5% LT1004-1.2 RED 10k 0.1% 3.2k 4 3 2765Ω 0.1% – 1/2 LT1002 13 10 + 1/2 LT1002 + 11 – 10k 0.1% 6 VOUT 0V TO10V 0°C TO 100°C 10k 0.1% 1004 TA05 168.3Ω 0.1% Low Temperature Coefficient 2-Terminal Current Source LM334 R 6.8k R ≤ 5k LT1004-1.2 IOUT ≈ 1.3V R 1004 TA06 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1634 Micropower Precision Shunt Reference 10µA Operating Current, 10ppm/°C Maximum Drift, 0.05% Initial Accuracy LT1460S3-2.5 Micropower Series Reference in SOT-23 100µA Operating Current, 20ppm/°C Maximum Drift, 0.2% Initial Accuracy 8 Linear Technology Corporation 1004fa LT/TP 1198 REV A 2K • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408)432-1900 ● FAX: (408) 434-0507 ● www.linear-tech.com LINEAR TECHNOLOGY CORPORATION 1985