LT1009 Series 2.5V Reference U FEATURES DESCRIPTIO ■ 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. ■ ■ ■ ■ ■ ■ 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 Available in 8-Lead SO and MSOP Packages and 3-Lead TO-92 Package 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 For a lower drift 2.5V reference, see the LT1019 data sheet. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. U ■ 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. TYPICAL APPLICATION 2.5V Reference Output Voltage 2.53 5V TO 35V 2.52 OUTPUT LT1009 10k* TRIM *DOES NOT AFFECT TEMPERATURE COEFFICIENT. ±5% TRIM RANGE REFERENCE VOLTAGE (V) 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 1009fd 1 LT1009 Series W W W AXI U U ABSOLUTE RATI GS (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 (OBSOLETE) ................... –55°C to 125°C U U W PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER BOTTOM VIEW ADJ + ORDER PART NUMBER TOP VIEW LT1009MH LT1009CH – NC NC NC (–) 8 7 6 5 1 2 3 4 (+) NC (+) ADJ MS8 PACKAGE 8-LEAD PLASTIC MSOP H PACKAGE 3-LEAD TO-46 METAL CAN LT1009CMS8 MS8 PART MARKING LTQZ TJMAX = 150°C, θJA = 250°C/ W TJMAX = 150°C, θJA = 440°C/ W, θ JC = 80°C/ W OBSOLETE PACKAGE Consider the MS8, S8 or Z Packages for Alternate Source ORDER PART NUMBER TOP VIEW NC 1 8 (+) NC 2 7 NC NC 3 6 (+) (–) 4 5 ADJ ORDER PART NUMBER BOTTOM VIEW ADJ + – LT1009S8 LT1009IS8 S8 PART MARKING S8 PACKAGE 8-LEAD PLASTIC SO 1009 1009I TJMAX = 150°C, θJA = 190°C/ W LT1009CZ LT1009IZ Z PACKAGE 3-LEAD PLASTIC TO-92 TJMAX = 100°C, θJA = 160°C/ W Consult LTC Marketing for parts specified with wider operating temperature ranges. U AVAILABLE OPTIO S TEMPERATURE 0°C to 70°C – 40°C to 85°C – 55°C to 125°C ACCURACY (%) TEMPERATURE COEFFICIENT (ppm/°C) 0.20 0.40 25 25 0.20 0.40 35 35 0.20 35 TO-46 (H) OBSOLETE PACKAGE STYLE MSOP-8 SO-8 (MS8) (S8) LT1009CH TO-92 (Z) LT1009CZ LT1009CMS8 LT1009S8 LT1009IZ LT10098IS8 LT1009MH 1009fd 2 LT1009 Series ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. LT1009M TYP MAX SYMBOL PARAMETER CONDITIONS MIN VZ Reverse Breakdown Voltage TA = 25°C, IR = 1mA H, Z Pkg MS, S Pkg 2.485 2.500 2.505 ∆VZ ∆IR Reverse Breakdown Change with Current 400µA ≤ IR ≤ 10mA rZ Reverse Dynamic Impedance 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 ∆VZ ∆Time Long-Term Stability LT1009I TYP MAX UNITS 2.495 2.500 2.505 2.495 2.500 2.505 2.49 2.50 2.51 2.49 2.50 2.51 V V ● 2.6 3.0 6 10 2.6 3.0 10 12 2.6 3.0 10 12 mV mV ● 0.2 0.4 0.6 1.0 0.2 0.4 1.0 1.4 0.2 0.4 1.0 1.4 Ω Ω 15 1.8 4 mV 15 25 35 15 25 ppm/°C ppm/°C ppm/°C ● ∆VZ ∆Temp LT1009/LT1009C MIN TYP MAX MIN 15 TA = 25°C ±0.1°C, IR = 1mA 15 25 25 35 20 Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: Guaranteed by Design. 20 20 ppm/kHr Note 3: Average temperature coefficient is defined as the total voltage change divided by the specified temperature change. U W TYPICAL PERFOR A CE CHARACTERISTICS Reverse Characteristics Forward Characteristics 10 –1 Reverse Voltage Change 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 1.0 1.8 2.2 1.4 REVERSE VOLTAGE (V) 0.6 0.4 0.2 TJ = –55°C 10 –5 0.5 0.8 2.6 0 0.001 3 2 1 0 0.01 0.1 1 10 FORWARD CURRENT (mA) 1009 G01 4 1009 G02 0 4 12 16 8 REVERSE CURRENT (mA) 20 1009 G03 1009fd 3 LT1009 Series U W TYPICAL PERFOR A CE CHARACTERISTICS Dynamic Impedance Response Time Output Noise Voltage 100 3.5 250 IR = 1mA TJ = 25°C 3.0 VOLTAGE SWING (V) 1 OUTPUT 2.5 200 10 NOISE (nV/√Hz) DYNAMIC IMPEDANCE (Ω) IR = 1mA –55°C ≤ TJ ≤ 125°C 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 0 100k FREQUENCY (Hz) 1009 G04 1 TIME (µs) 20 1009 G06 1009 G05 W W SCHE ATIC DIAGRA + Q11 Q7 24k 24k 6.6k Q8 Q7 20pF 30pF 10k Q10 500Ω Q9 Q2 Q4 Q1 Q6 Q3 Q5 ADJ 30k 6.6k Q12 720Ω Q13 – 1009 SD 1009fd 4 LT1009 Series U TYPICAL APPLICATIO S Wide Supply Range, Adjustable Reference Low Temperature Coefficient Power Regulator 3.6V TO 40V V+ VIN LM334 V– LT1009 R IN LT317A OUT ADJ 62Ω VOUT 1.2k 375Ω LT1009 10k 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 1009fd 5 LT1009 Series U PACKAGE DESCRIPTIO 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) 0.500 (12.700) MIN 0.100 (2.540) TYP 0.050 (1.270) 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 MS8 Package 8-Lead Plastic MSOP (Reference LTC DWG # 05-08-1660) 0.889 ± 0.127 (.035 ± .005) 5.23 (.206) MIN 3.20 – 3.45 (.126 – .136) 0.42 ± 0.038 (.0165 ± .0015) TYP 3.00 ± 0.102 (.118 ± .004) (NOTE 3) 0.65 (.0256) BSC 8 7 6 5 0.52 (.0205) REF RECOMMENDED SOLDER PAD LAYOUT 0.254 (.010) 3.00 ± 0.102 (.118 ± .004) (NOTE 4) 4.90 ± 0.152 (.193 ± .006) DETAIL “A” 0° – 6° TYP GAUGE PLANE 0.53 ± 0.152 (.021 ± .006) DETAIL “A” 1 2 3 4 1.10 (.043) MAX 0.86 (.034) REF 0.18 (.007) SEATING PLANE 0.22 – 0.38 (.009 – .015) TYP 0.65 (.0256) BSC 0.127 ± 0.076 (.005 ± .003) MSOP (MS8) 0204 NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 1009fd 6 LT1009 Series U PACKAGE DESCRIPTIO S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .189 – .197 (4.801 – 5.004) NOTE 3 .045 ±.005 .050 BSC 7 8 .245 MIN 6 5 .160 ±.005 .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) .030 ±.005 TYP 1 RECOMMENDED SOLDER PAD LAYOUT .010 – .020 × 45° (0.254 – 0.508) 3 2 .053 – .069 (1.346 – 1.752) .008 – .010 (0.203 – 0.254) .004 – .010 (0.101 – 0.254) 0°– 8° TYP .016 – .050 (0.406 – 1.270) NOTE: 1. DIMENSIONS IN 4 .050 (1.270) BSC .014 – .019 (0.355 – 0.483) TYP INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) SO8 0303 Z Package 3-Lead Plastic TO-92 (Similar to TO-226) (Reference LTC DWG # 05-08-1410) .180 ± .005 (4.572 ± 0.127) .060 ± .005 (1.524± 0.127) DIA .90 (2.286) NOM .180 ± .005 (4.572 ± 0.127) .500 (12.70) MIN .050 UNCONTROLLED (1.270) LEAD DIMENSION MAX .016 ± .003 (0.406 ± 0.076) .050 (1.27) BSC 5° NOM .015 ± .002 (0.381 ± 0.051) Z3 (TO-92) 0801 .060 ± .010 (1.524 ± 0.254) 3 2 1 .098 +.016/–.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 .140 ± .010 (3.556 ± 0.127) 10° NOM 1009fd 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 LT1009 Series U TYPICAL APPLICATIO 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 1009fd 8 Linear Technology Corporation LT/LWI/LT 0505 REV D • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 1985