LT1004 Micropower Voltage Reference U FEATURES ■ ■ ■ ■ ■ ■ DESCRIPTIO 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 APPLICATIO S ■ ■ ■ ■ 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 APPLICATIO Typical Distribution of Reference Voltage (LT1004-1.2) Micropower Cold Junction Compensation for Thermocouples 200 R1 160 1684Ω 5k AT 25°C† + LT1004-1.2 186Ω 120 100 80 60 40 – * QUIESCENT CURRENT ≅ 15µA YELLOW SPRINGS INST. CO. PART #44007 20 1.2375 1.237 1.2365 1.236 1.2355 1.235 1.2345 COMPENSATES WITHIN ±1°C FROM 0°C TO 60°C 1.234 † 1.2335 R1 233k 299k 300k 2.1M 140 1.233 + – 1.8k NUMBER OF PARTS 3V LITHIUM THERMOCOUPLE TYPE J K T S 1200 PARTS TA = 25°C 180 1.2325 100k * 1004 TA02 1004 TA01 1 LT1004 W W W AXI U U ABSOLUTE RATI GS (Note 1) Reverse Breakdown Current ................................. 30mA Forward Current .................................................. 10mA Storage Temperature Range ................ – 65°C to 150°C Lead Temperature (Soldering, 10 sec)................. 300°C Operating Temperature Range LT1004M (OBSOLETE) .................... – 55°C to 125°C LT1004I ............................................. – 40°C to 85°C LT1004C ................................................. 0°C to 70°C U U W PACKAGE/ORDER I FOR ATIO TOP VIEW BOTTOM VIEW 1 2 8 VOUT NC 2 7 NC NC 3 6 VOUT NC 5 (DO NOT USE) GND 4 H PACKAGE 2-LEAD TO-46 METAL CAN Z PACKAGE 3-LEAD PLASTIC TO-92 S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 440°C/W, θJC = 80°C/W TJMAX = 100°C, θJA = 160°C/ W TJMAX = 100°C, θJA = 150°C/ W ORDER PART NUMBER LT1004MH-1.2 LT1004MH-2.5 BOTTOM VIEW NC 1 LT1004CH-1.2 LT1004CH-2.5 OBSOLETE PACKAGE Consider the SO-8 or Z Packages for Alternate Source ORDER PART NUMBER S8 PART MARKING ORDER PART NUMBER LT1004CS8-1.2 LT1004CS8-2.5 LT1004IS8-1.2 LT1004IS8-2.5 0412 0425 0412I 0425I LT1004CZ-1.2 LT1004CZ-2.5 LT1004IZ-1.2 LT1004IZ-2.5 Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 2) SYMBOL PARAMETER CONDITIONS VZ IR = 100µA LT1004M: – 55°C ≤ TA ≤ 125°C LT1004C: 0°C ≤ TA ≤ 70°C LT1004I: – 40°C ≤ TA ≤ 85°C Reverse Breakdown Voltage ∆VZ ∆Temp Average Temperature Coefficient IMIN ∆VZ ∆IR Minimum Operating Current Reverse Breakdown Voltage Change with Current MIN ● ● ● IMIN ≤ IR ≤ 20mA (Note 3) LT1004-1.2 TYP MAX 1.231 1.220 1.225 1.220 1.235 1.230 1.235 1.230 20 Reverse Dynamic Impedance 2.520 2.535 2.530 2.530 20 V V V V ppm/°C µA ● 1.0 1.5 mV mV ● 10 20 10 20 mV mV 0.6 1.5 Ω Ω IR = 100µA 0.2 10 0.6 1.5 12 0.2 Wide Band Noise (RMS) IR = 100µA, 10Hz ≤ f ≤ 10kHz 60 120 Long Term Stability IR = 100µA, TA = 25°C ± 0.1°C 20 20 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 2.500 2.500 2.500 2.500 UNITS 20 8 ● en ∆VZ ∆Time 2.480 2.460 2.470 2.460 LT1004-2.5 TYP MAX 1.0 1.5 ● IMIN ≤ IR ≤ 1mA 1mA ≤ IR ≤ 20mA rZ 1.239 1.245 1.245 1.245 MIN 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 PERFOR A CE CHARACTERISTICS (1.2V) Reverse Characteristics 10 1 0.2 0.4 0.6 0.8 1.0 REVERSE VOLTAGE (V) 1.2 –55°C TO 125°C 1.4 8 4 0.4 1 10 0.1 REVERSE CURRENT (mA) 0 0.01 100 Temperature Drift Reverse Dynamic Impedance 10k –55°C TO 125°C f = 25Hz DYNAMIC IMPEDANCE (Ω) DYNAMIC IMPEDANCE (Ω) 1.230 100 1004 G11 Reverse Dynamic Impedance 100 1.235 1 10 0.1 FORWARD CURRENT (mA) 1004 G02 1.245 REVERSE VOLTAGE (V) 0.8 0 1004 G01 1.240 TA = 25°C 12 –4 0.01 0.1 1.2 FORWARD VOLTAGE (V) –55°C TO 125°C 0 Forward Characteristics Reverse Voltage Change 16 OUTPUT VOLTAGE CHANGE (mV) REVERSE CURRENT (µA) 100 10 1 TA = 25°C IR = 100µA 1k 100 10 1 1.225 0.1 0.01 –55 –35 –15 5 25 45 65 85 105 125 TEMPERATURE (°C) 1 10 0.1 REVERSE CURRENT (mA) Noise Voltage NOISE (nV/√Hz) NOISE (nV/√Hz) 40 20 100 10 1M RC LOW PASS 100µA R 1.5 C 30 200 100k Reponse Time VOLTAGE (V) 50 300 10k 1k FREQUENCY (Hz) IR = 100µA 60 500 400 100 1004 G06 Filtered Output Noise 70 IR = 100µA TA = 25°C 600 10 1004 G05 1004 G04 700 0.1 100 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 PERFOR A CE CHARACTERISTICS (2.5V) Reverse Characteristics Forward Characteristics 1.2 –55°C TO 125°C FORWARD VOLTAGE (V) REVERSE CURRENT (µA) 100 10 1 0.1 0 0.5 1.0 1.5 2.0 REVERSE VOLTAGE (V) 2.5 TA = 25°C 0.8 0.4 0 0.01 3.0 1 10 0.1 FORWARD CURRENT (mA) 1004 G11 1004 G10 Temperature Drift 2.500 2.495 2.490 2.485 DYNAMIC IMPEDANCE (Ω) DYNAMIC IMPEDANCE (Ω) 2.505 10k f = 25Hz –55°C TO 125°C 2.515 REFERENCE VOLTAGE (V) Reverse Dynamic Impedance Reverse Dynamic Impedance 1000 2.510 100 100 10 1 TA = 25°C IR = 100µA 1k 100 10 1 2.480 0.1 0.01 –55 –35 –15 5 25 45 65 85 105 125 TEMPERATURE (°C) 1 10 0.1 REVERSE CURRENT (mA) Noise Voltage 100 10k 1k FREQUENCY (Hz) 100k IR = 100µA 1M 1004 G14 Reponse Time Filtered Output Noise 120 1200 IR = 100µA 800 600 400 80 100µA R 3 RC LOW PASS VOLTAGE (V) INTEGRATED NOISE (µV) 100 1000 NOISE (nV/√Hz) 10 1004 G13 1004 G12 1400 0.1 100 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 LT338A VIN ≥ 8V IN 5V OUT VIN + 300Ω 1% 1µF ADJ + ADJ VOUT VOUT VIN 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 – LT1004-1.2 LO = BATTERY LOW R 2 8 4 7 – LT1007C 10M 3 1004 TA14 + R1 SETS TRIP POINT, 60.4k PER CELL FOR 1.8V/CELL IOUT 1004 TA04 1.235 R 2V R≈ IOUT + 10µA IOUT = 4 † 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 IOUT = 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 DESCRIPTIO H Package 2-Lead and 3-Lead TO-46 Metal Can (Reference LTC DWG # 05-08-1340) 0.209 – 0.219 (5.309 – 5.537) 0.178 – 0.195 (4.521 – 4.953) REFERENCE PLANE 0.085 – 0.105 (2.159 – 2.667) 0.500 (12.700) MIN 0.050 (1.270) TYP 0.100 (2.540) TYP 0.050 (1.270) TYP PIN 1 * 0.016 – 0.021** (0.406 – 0.533) DIA FOR 3-LEAD PACKAGE ONLY 0.025 (0.635) MAX 45° 0.028 – 0.048 (0.711 – 1.219) 0.036 – 0.046 (0.914 – 1.168) H02/03(TO-46) 1098 *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) 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) TYP *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) BSC 0.150 – 0.157** (3.810 – 3.988) 0.228 – 0.244 (5.791 – 6.197) SO8 1298 1 2 3 4 Z Package 3-Lead Plastic TO-92 (Similar to TO-226) (Reference LTC DWG # 05-08-1410) 0.060 ± 0.005 (1.524± 0.127) DIA 0.180 ± 0.005 (4.572 ± 0.127) 0.90 (2.286) NOM 0.180 ± 0.005 (4.572 ± 0.127) 0.500 (12.70) MIN 0.050 (1.27) BSC 0.050 UNCONTROLLED (1.270) LEAD DIMENSION MAX 0.016 ± 0.003 (0.406 ± 0.076) 0.060 ± 0.010 (1.524 ± 0.254) 0.140 ± 0.010 (3.556 ± 0.127) 5° NOM 0.015 ± 0.002 (0.381 ± 0.051) Z3 (TO-92) 0401 0.098 +016/–0.04 (2.5 +0.4/–0.1) 2 PLCS TO-92 TAPE AND REEL REFER TO TAPE AND REEL SECTION OF LTC DATA BOOK FOR ADDITIONAL INFORMATION 10° NOM 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. 7 LT1004 U TYPICAL APPLICATIO S 0°C to 100°C Linear Output Thermometer NETWORK DETAIL YSI 44201 BRN GRN 6250Ω RT NETWORK YSI 44201 15V 2.7k 5% RED 10k 0.1% 3.2k 4 3 LT1004-1.2 2765Ω 0.1% – 1/2 LT1002 13 10 + 1/2 LT1002 + 11 VOUT 0V TO10V 0°C TO 100°C 6 – 10k 0.1% 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 LT1790 Precision Micropower LDO Reference in SOT-23 10ppm/°C Max Drift, 0.05% Initial Accuracy 8 Linear Technology Corporation 1004fb LT/TP 0601 REV B 1.5K • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 1985