LT1009 Series 2.5V Reference U FEATURES ■ ■ ■ ■ ■ ■ DESCRIPTIO Maximum Initial Tolerance: 0.2% Guaranteed Temperature Stability Maximum 0.6Ω Dynamic Impedance Wide Operating Current Range Directly Interchangeable with LM136 for Improved Performance No Adjustments Needed for Minimum Temperature Coefficient U APPLICATIO S ■ ■ ■ ■ Reference for 5V Systems 8-Bit A/D and D/A Reference Digital Voltmeters Current Loop Measurement and Control Systems Power Supply Monitor Even though no adjustments are needed with the LT1009, a third terminal allows the reference voltage to be adjusted ±5% to calibrate out system errors. In many applications, the LT1009 can be used as a pin-to-pin replacement of the LM136 and the external trim network eliminated. For a lower drift 2.5V reference, see the LT1019 data sheet. , LTC and LT are registered trademarks of Linear Technology Corporation. U ■ The LT®1009 is a precision trimmed 2.5V shunt regulator diode featuring a maximum initial tolerance of only ±5mV. The low dynamic impedance and wide operating current range enhances its versatility. The 0.2% reference tolerance is achieved by on-chip trimming which not only minimizes the initial voltage tolerance but also minimizes the temperature drift. TYPICAL APPLICATION 2.5V Reference Output Voltage 2.53 5V TO 35V OUTPUT LT1009 10k* TRIM *DOES NOT AFFECT TEMPERATURE COEFFICIENT. ±5% TRIM RANGE REFERENCE VOLTAGE (V) 2.52 3.6k 2.51 GUARANTEED MAXIMUM TYPICAL 2.50 2.49 GUARANTEED MINIMUM 2.48 1009 TA01 2.47 –50 –25 50 25 75 0 TEMPERATURE (°C) 100 125 1009 TA02 1 LT1009 Series U W W W ABSOLUTE MAXIMUM RATINGS (Note 1) Reverse Current .................................................... 20mA Forward Current ................................................... 10mA Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C Operating Temperature Range LT1009/LT1009C .................................. 0°C to 70°C LT1009I ........................................... – 40°C to 85°C LT1009M ........................................ –55°C to 125°C W U U PACKAGE/ORDER INFORMATION BOTTOM VIEW ADJ TOP VIEW + – BOTTOM VIEW NC 1 8 NC 2 7 NC 3 6 4 5 H PACKAGE 3-LEAD TO-46 METAL CAN NC ORDER PART NUMBER 2 – 1 Z PACKAGE 3-LEAD PLASTIC TO-92 TJMAX = 100°C, θJA = 160°C/ W TJMAX = 150°C, θJA = 190°C/ W ORDER PART NUMBER LT1009S8 LT1009IS8 LT1009MH LT1009CH + ADJ S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 440°C/ W, θJC = 80°C/ W ADJ 3 ORDER PART NUMBER LT1009CZ LT1009IZ S8 PART MARKING 1009 1009I U AVAILABLE OPTIO S TEMPERATURE 0°C to 70°C –40°C to 85°C –55°C to 125°C 2 ACCURACY (%) TEMPERATURE COEFFICIENT (ppm/°C) 0.20 0.40 25 25 0.20 0.40 25 35 0.20 35 TO-46 (H) PACKAGE STYLE SO-8 (S8) LT1009CH TO-92 (Z) LT1009CZ LT1009S8 LT1009IZ LT1009IS8 LT1009MH LT1009 Series ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. For MIL-STD components, please refer to LTC883C data sheet for test listing and parameters. SYMBOL PARAMETER Reverse Breakdown VZ Voltage ∆VZ Reverse Breakdown ∆IR Change with Current rZ Reverse Dynamic Impedance CONDITIONS TA = 25°C, IR = 1mA, H, Z Pkg S Pkg 400µA ≤ IR ≤ 10mA ● IR = 1mA ● Temperature Stability TMIN ≤ TA ≤ TMAX Average Temperature 0°C ≤ TA ≤ 70°C Coefficient (Notes 2, 3) – 40°C ≤ TA ≤ 85°C – 55°C ≤ TA ≤ 125°C Long-Term Stability TA = 25°C ±0.1°C IR = 1mA ∆VZ ∆Temp ∆VZ ∆Time LT1009M MIN TYP MAX 2.495 2.500 2.505 2.6 3.0 0.2 0.4 6 10 0.6 1.0 15 15 25 ● 25 20 Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: Guaranteed by Design. LT1009I LT1009/LT1009C MIN TYP MAX MIN TYP MAX 2.495 2.500 2.505 2.495 2.500 2.505 2.49 2.50 2.51 2.49 2.50 2.51 2.6 10 2.6 10 3.0 12 3.0 12 0.2 1.0 0.2 1.0 0.4 1.4 0.4 1.4 15 25 35 15 1.8 15 4 25 35 20 20 UNITS V V mV mV Ω Ω mV ppm/°C ppm/°C ppm/°C ppm/kHr Note 3: Average temperature coefficient is defined as the total voltage change divided by the specified temperature change. U W TYPICAL PERFORMANCE CHARACTERISTICS Reverse Characteristics Reverse Voltage Change Forward Characteristics 10 –1 5 1.2 REVERSE VOLTAGE CHANGE (mV) TJ = 25°C 10 –2 FORWARD VOLTAGE (V) REVERSE CURRENT (A) 1.0 10 –3 TJ = 25°C 10 –4 TJ = 125°C 0.8 0.6 0.4 0.2 4 3 2 1 TJ = –55°C 10 –5 0.5 1.0 1.8 2.2 1.4 REVERSE VOLTAGE (V) 2.6 0 0.001 0 0.01 0.1 1 10 FORWARD CURRENT (mA) 0 4 12 16 8 REVERSE CURRENT (mA) 20 1009 G02 1009 G01 1009 G03 3 LT1009 Series U W TYPICAL PERFORMANCE CHARACTERISTICS Dynamic Impedance Output Noise Voltage 100 IR = 1mA –55°C ≤ TJ ≤ 125°C IR = 1mA TJ = 25°C 3.0 VOLTAGE SWING (V) 1 OUTPUT 2.5 200 10 NOISE (mV/√Hz) DYNAMIC IMPEDANCE (Ω) Response Time 3.5 250 150 100 2.0 1.5 5k 1.0 0.5 INPUT OUTPUT 0 10 INPUT 4 0.1 100 10 1k 10k FREQUENCY (Hz) 50 100k 0 10 1k 100 10k 1 TIME (µs) 0 100k FREQUENCY (Hz) 1009 G04 1009 G06 1009 G05 W W SCHE ATIC DIAGRA + 50k Q17 Q9 24k 24k 6.6k Q8 Q7 20pF 30pF 10k Q16 500Ω Q10 Q2 Q11 Q15 ADJ 30k 6.6k Q4 Q1 Q6 Q3 Q5 Q12 Q13 2k Q14 1.1k Q18 – 1009 SD 4 20 LT1009 Series U TYPICAL APPLICATIONS Wide Supply Range, Adjustable Reference Low Temperature Coefficient Power Regulator 3.6V TO 40V V+ VIN LM334 V– R IN LT317A OUT ADJ 62Ω 375Ω LT1009 10k LT1009 VOUT 1.2k 1009 TA03 2k 1009 TA04 Switchable ±1.25V Bipolar Reference 5V 5k 5V 5k LT1009 –5V 10k 1% OUT 9.76k 1% 500Ω 1009 TA05 5k –5V 5 LT1009 Series U PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted. H Package 2-Lead and 3-Lead TO-46 Metal Can (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) 0.050 (1.270) TYP 0.500 (12.700) MIN 0.100 (2.540) TYP 0.050 (1.270) TYP PIN 1 FOR 3-LEAD PACKAGE ONLY * 45° 0.025 (0.635) MAX 0.036 – 0.046 (0.914 – 1.168) 0.016 – 0.021** (0.406 – 0.533) DIA 0.028 – 0.048 (0.711 – 1.219) 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) Z Package 3-Lead Plastic TO-92 (Similar to TO-226) (LTC DWG # 05-08-1410) 0.060 ± 0.005 (1.524± 0.127) DIA 0.180 ± 0.005 (4.572 ± 0.127) 0.180 ± 0.005 (4.572 ± 0.127) 0.060 ± 0.010 (1.524 ± 0.254) 0.90 (2.286) NOM 0.140 ± 0.010 (3.556 ± 0.127) Z3 (TO-92) 1098 0.500 (12.70) MIN 0.050 UNCONTROLLED (1.270) LEAD DIMENSION MAX 5° NOM 0.015 ± 0.002 (0.381 ± 0.051) 0.050 (1.27) BSC 6 0.016 ± 0.003 (0.406 ± 0.076) 10° NOM LT1009 Series U PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted. S8 Package 8-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.189 – 0.197* (4.801 – 5.004) 8 7 6 5 0.150 – 0.157** (3.810 – 3.988) 0.228 – 0.244 (5.791 – 6.197) 1 0.010 – 0.020 × 45° (0.254 – 0.508) 0.008 – 0.010 (0.203 – 0.254) 2 3 4 0.053 – 0.069 (1.346 – 1.752) 0.004 – 0.010 (0.101 – 0.254) 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 0.050 (1.270) BSC 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. SO8 1298 7 LT1009 Series U TYPICAL APPLICATION Low Noise 2.5V Buffered Reference 1µF VIN ≥ 6V 10k 2 1k 10k 1k + 7 LT1001C 3 + 6 2.5V 4 20µF 100k LT1009 – + 20µF 1009 TA06 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1019 Precision Series Reference Bandgap, 0.05%, 5ppm/°C LT1236 Precision Series Reference 5V and 10V Zener-Based 5ppm/°C, SO-8 Package LTC®1798 Micropower Low Dropout Series Reference 0.15% Max, 6.5µA Supply Current LT1460 Micropower Precision Series Reference Bandgap, 130µA Supply Current 10ppm/°C, Available in SOT-23 LT1634 Micropower Precision Shunt Voltage Reference Bandgap 0.05%, 10ppm/°C, 10µA Supply Current LT1461 Micropower Precision Series Reference 0.04% Max, 3ppm/°C Max, 35µA Supply Current 8 Linear Technology Corporation 1009sfa LT/TP 0200 2K REV A • 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