LM136-2.5/LM336-2.5 2.5V Reference U FEATURES ■ ■ ■ ■ DESCRIPTIO Guaranteed Temperature Stability Maximum 0.6Ω Dynamic Impedance Adjustable for Minimum Temperature Coefficient Wide Operating Current Range 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 , LTC and LT are registered trademarks of Linear Technology Corporation. The LM136-2.5 is a general purpose shunt regulator diode designed to operate over a wide current range while maintaining good stability with time and temperature. The third terminal allows either the temperature coefficient to be minimized or the reference voltage to be adjusted without changing the temperature coefficient. Because it operates as a shunt regulator it can be used equally well as a positive or negative reference. The LM136-2.5 is available with initial tolerances as low as 1% in either a TO-46 metal can for hermetic requirements or a low cost TO-92 plastic package. Linear’s advanced design, test and process techniques have optimized the LM136-2.5 to achieve superior performance and reliability over previous designs. For more demanding precision reference applications requiring very low initial tolerance and temperature coefficients, consult the LT1009 data sheet. A typical 2.5V reference with trim is shown below. U TYPICAL APPLICATIO Reverse Voltage Change 2.5V Reference 3.5 TA = 25°C 3.6k OUTPUT LM336-2.5 10k* TRIM * DOES NOT AFFECT TEMPERATURE COEFFICIENT REVERSE VOLTAGE CHANGE (mV) 5V TO 35V 3.0 2.5 2.0 1.5 1.0 0.5 136/336 TA01a 0 0 2 4 8 6 REVERSE CURRENT (mA) 10 136/336 TA01b 1 LM136-2.5/LM336-2.5 W W U W ABSOLUTE AXI U RATI GS (Note 1) Operating Temperature Range LM136-2.5 (OBSOLETE) .............. –55°C to 125°C LM336-2.5 .............................................. 0°C to 70°C Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C Reverse Current .................................................... 15mA Forward Current ................................................... 10mA U W U PACKAGE/ORDER I FOR ATIO BOTTOM VIEW ADJ + ORDER PART NUMBER ADJ – H PACKAGE 3-LEAD TO-46 METAL CAN TJMAX = 150°C, θJA = 440°C/W (NOTE 2) ORDER PART NUMBER BOTTOM VIEW LM136H-2.5 LM136AH-2.5 LM336H-2.5 LM336AH-2.5 + – LM336Z-2.5 LM336BZ-2.5 Z PACKAGE 3-LEAD PLASTIC TO-92 TJMAX = 150°C, θJA = 160°C/W (NOTE 2) OBSOLETE PACKAGE Consider the Z Packages for Alternate Source 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 VZ ∆VZ ∆IR rZ PARAMETER CONDITIONS LM136/LM136A MIN TYP MAX MIN Reverse Breakdown Voltage TA = 25°C, IR = 1mA LM136/LM336 LM136A/LM336B 2.440 2.465 2.390 2.440 Reverse Breakdown Change with Current Reverse Dynamic Impedance 2.490 2.490 2.540 2.515 LM336/LM336B TYP MAX 2.490 2.490 2.590 2.540 V V 400µA ≤ IR ≤ 10mA TA = 25°C TMIN ≤ TA ≤ TMAX ● 2.6 3.0 6 10 2.6 3.0 10 12 mV mV IR = 1mA TA =25°C TMIN ≤ TA ≤ TMAX ● 0.2 0.4 0.6 1.0 0.2 0.4 1.0 1.4 Ω Ω ● 12 18 1.8 6 ∆VZ ∆Temp Temperature Stability VR Adjusted to 2.490V, IR = 1mA, TMIN ≤ TA ≤ TMAX (See Figure 1) ∆VZ ∆Time Long Term Stability TA = 25°C ± 0.1°C, IR = 1mA Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LT1009 is an improved, low cost, pin for pin replacement for the “A” and “B” versions. For further information consult the LT1009 data sheet. 20 20 V+ 2.490V R 1mA * D1† 5k D2† D1, D2 1N4148 * ADJUST TO 2.490 ANY SILICON SIGNAL DIODE † 136/336 F01 Figure 1. Adjusting the LM336 for Minimum Temperature Coefficient 2 UNITS mV ppm/kHr LM136-2.5/LM336-2.5 U W TYPICAL PERFOR A CE CHARACTERISTICS Reverse Characteristics Temperature Drift Forward Characteristics 10 –1 1.2 2.59 Tj = 25°C 10 –3 Tj = 25°C Tj = 125°C 10 –4 2.55 REVERSE VOLTAGE (V) FORWARD VOLTAGE (V) REVERSE CURRENT (A) 1.0 10 –2 0.8 0.6 0.4 2.53 2.51 2.49 2.47 2.45 2.43 2.41 0.2 Tj = –55°C 10 –5 0.6 1.0 IR = 1mA 2.57 2.39 1.8 2.2 1.4 REVERSE VOLTAGE (V) 0 0.001 2.6 0.01 0.1 1 FORWARD CURRENT (mA) 2.37 –55 –35 –15 10 5 25 45 65 85 105 125 TEMPERATURE (°C) 136/336 G02 136/336 G03 136/336 • G01 Dynamic Impedance 100 Response Time Zener Noise Voltage 250 IR = 1mA –55°C ≤ Tj ≤ 125°C 3.5 IR = 1mA Tj = 25°C 3.0 OUTPUT 1 VOLTAGE SWING (V) 200 10 NOISE (nV/√Hz) DYNAMIC IMPEDANCE (Ω) 2.5 150 100 2.0 1.5 5.1k 1.0 INPUT 0.5 0 OUTPUT 12 INPUT 8 4 0.1 10 100 1k 10k FREQUENCY (Hz) 50 10 100k 100 1k 0 100k 10k 0 FREQUENCY (Hz) 136/336 G05 136/336 G04 1 TIME (µs) 20 136/336 G06 W W SCHE ATIC DIAGRA + Q17 50k Q9 24k 24k Q8 20pF 6.6k Q7 10k 30pF Q16 Q10 Q11 500Ω Q15 Q2 30k Q4 Q1 Q6 ADJ Q12 Q3 Q5 Q13 2k Q14 1.1k 6.6k Q18 – 136/336 SD 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. 3 LM136-2.5/LM336-2.5 U TYPICAL APPLICATIO S Switchable ±1.25V Bipolar Reference Low Temperature Coefficient Power Regulator Wide Supply Range, Reference Low Noise 2.5V Buffered Reference 1µF 5V VIN 3.6V TO 40V IN LT317A OUT ADJ VOUT R 62Ω R1 375Ω 1N4148 LM336-2.5 10k 1% OUT 5k 2N3904 –5V R2* 10k LM336 * *ADJUST R2 FOR 3.75V ACROSS R1 1k *LM336-2.5 –5V – 3 + 7 * 136/336 TA04 6 2.5V 4 20µF 100k + 1N4148 5k 136/336 TA03 1k + 1N4148 500Ω 10k 2k 2 OP-07CH 10k 9.76k 1% 2N3906 1N4148 136/336 TA02 10k 1.2k 5V V+ LM334 V– VIN ≥ 6V 5k 20µF 136/336 TA05 *LM336Z-2.5 U PACKAGE DESCRIPTIO Z Package 3-Lead Plastic TO-92 (Similar to TO-226) H Package 2-Lead and 3-Lead TO-46 Metal Can (Reference LTC DWG # 05-08-1410) (Reference LTC DWG # 05-08-1340) 0.209 – 0.219 (5.309 – 5.537) 0.178 – 0.195 (4.521 – 4.953) 0.085 – 0.105 (2.159 – 2.667) 0.500 (12.700) MIN REFERENCE PLANE 0.90 (2.286) NOM 0.180 ± 0.005 (4.572 ± 0.127) * 0.025 (0.635) MAX 0.016 – 0.021** (0.406 – 0.533) DIA 0.050 (1.270) TYP 0.180 ± 0.005 (4.572 ± 0.127) 0.060 ± 0.005 (1.524± 0.127) DIA 0.500 (12.70) MIN 0.100 (2.540) TYP 0.050 (1.270) TYP PIN 1 FOR 3-LEAD PACKAGE ONLY 0.016 ± 0.003 (0.406 ± 0.076) 0.050 (1.27) BSC 0.015 ± 0.002 (0.381 ± 0.051) 0.098 +016/–0.04 (2.5 +0.4/–0.1) 2 PLCS 0.060 ± 0.010 (1.524 ± 0.254) 45° 0.028 – 0.048 (0.711 – 1.219) 0.036 – 0.046 (0.914 – 1.168) 5° NOM 0.050 UNCONTROLLED (1.270) LEAD DIMENSION MAX TO-92 TAPE AND REEL REFER TO TAPE AND REEL SECTION OF LTC DATA BOOK FOR ADDITIONAL INFORMATION 0.140 ± 0.010 (3.556 ± 0.127) 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) Z3 (TO-92) 0401 10° NOM OBSOLETE PACKAGE RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1009 Precision 2.5V Shunt Reference 0.2% Max Initial Tolerance 4 Linear Technology Corporation 136336fa LT/CP 0801 1.5K REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 1986