LM129/LM329 6.9V Precision Voltage Reference Features n n n n Description Guaranteed 10ppm/°C Temperature Coefficient Guaranteed 1Ω Maximum Dynamic Impedance Guaranteed 20µV Maximum Wideband Noise Wide Operating Current Range: 0.6mA to 15mA Applications n n n n Transducers A/D and D/A Converters Calibration Standards Instrumentation Reference The LM®329 temperature compensated 6.9V Zener references provide excellent stability over time and temperature, very low dynamic impedance and a wide operating current range. The device achieves low dynamic impedance by incorporating a high gain shunt regulator around the Zener. The excellent noise performance of the device is achieved by using a “buried Zener” design which eliminates surface noise phenomenon associated with ordinary Zeners. To serve a wide variety of applications, the LM129 is available in several temperature coefficient grades and two package styles. A 20mA positive current source application is shown below. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical Application 20mA Positive Current Source Reverse Voltage Change 20V 8 20k 0.1% 2 LM329 6.95V 3 20k 0.1% 4.3k – 7 LT1001 + REVERSE VOLTAGE CHANGE (mV) 174Ω 0.1% 6 4 10k OUT 20mA 129329 TA01 TA = 25°C 7 6 5 4 3 2 1 0 0 2 4 8 6 REVERSE CURRENT (mA) 10 129329 TA01b 129329fd For more information www.linear.com/LM329 1 LM129/LM329 Absolute Maximum Ratings (Note 1) Operating Temperature Range LM129 (OBSOLETE)........................... –55°C to 125°C LM329...................................................... 0°C to 70°C Storage Temperature Range.................... –65°C to 150°C Lead Temperature (Soldering, 10 sec)................... 300°C Reverse-Breakdown Current...................................30mA Forward Current........................................................2mA Pin Configuration BOTTOM VIEW BOTTOM VIEW H PACKAGE 2-LEAD TO-46 METAL CAN Z PACKAGE 3-LEAD PLASTIC TO-92 TJMAX = 150°C, qJA = 440°C/W, qJC = 80°C/W TJMAX = 150°C, θJA = 160°C/W OBSOLETE PACKAGE Consider the Z Package for Alternate Source order information LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LM129AH#PBF LM129AH#TRPBF LM129AH 2-Lead Plastic TO-46 Metal Can –55°C to 125°C LM129BH#PBF LM129BH#TRPBF LM129BH 2-Lead Plastic TO-46 Metal Can –55°C to 125°C LM129CH#PBF LM129CH#TRPBF LM129CH 2-Lead Plastic TO-46 Metal Can –55°C to 125°C LM329AH#PBF LM329AH#TRPBF LM329AH 2-Lead Plastic TO-46 Metal Can 0°C to 70°C LM329BH#PBF LM329BH#TRPBF LM329BH 2-Lead Plastic TO-46 Metal Can 0°C to 70°C LM329CH#PBF LM329CH#TRPBF LM329CH 2-Lead Plastic TO-46 Metal Can 0°C to 70°C LM329DH#PBF LM329DH#TRPBF LM329DH 2-Lead Plastic TO-46 Metal Can 0°C to 70°C LM329AZ#PBF LM329AZ#TRPBF LM329BZ 3-Lead Plastic TO-92 0°C to 70°C LM329BZ#PBF LM329BZ#TRPBF LM329BZ 3-Lead Plastic TO-92 0°C to 70°C LM329CZ#PBF LM329CZ#TRPBF LM329BZ 3-Lead Plastic TO-92 0°C to 70°C LM329DZ#PBF LM329DZ#TRPBF LM329BZ 3-Lead Plastic TO-92 0°C to 70°C Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ 2 129329fd For more information www.linear.com/LM329 LM129/LM329 Electrical Characteristics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 2) CONDITIONS LM129A/ LM129B/LM129C MIN TYP MAX LM329A/LM329B/ LM329C/LM329D MIN TYP MAX 6.7 6.6 SYMBOL PARAMETER VZ Reverse-Breakdown Voltage TA = 25°C, 0.6mA ≤ IR ≤ 15mA ∆VZ ∆IR Reverse-Breakdown Voltage Change with Current TA = 25°C, 0.6mA ≤ IR ≤ 15mA 1mA ≤ IR ≤ 15mA l ∆VZ ∆Temp Temperature Coefficient IR = 1mA, LM129A/LM329A LM129B/LM329B LM129C/LM329C LM329D l l l l 1mA ≤ IR ≤ 15mA l 1 l Change in Temperature Coefficient rZ Dynamic Impedance TA = 25°C, IR = 1mA 1mA ≤ IR ≤ 15mA 6.9 7.2 6.9 7.25 9 12 14 9 12 20 mV mV 6 15 30 10 20 50 6 15 30 50 10 20 50 100 ppm/°C ppm/°C ppm/°C ppm/°C 0.6 0.8 1 0.8 1 2 Ω Ω 20 7 100 µV en RMS Noise TA = 25°C, 10Hz ≤ f ≤ 10kHz 7 ∆VZ ∆Time Long-Term Stability TA = 45°C ±0.1°C, IR = 1mA ±0.3% 20 Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. UNITS 1 20 V ppm/°C ppm/kHr Note 2: To determine the junction temperature as a function of the ambient temperature, see θJA for each package. 129329fd For more information www.linear.com/LM329 3 LM129/LM329 Typical Performance Characteristics Reverse Characteristics Dynamic Impedance 100 100 Response Time 8 TA = 25°C OUTPUT REVERSE CURRENT (mA) 10 1.0 TJ = 25°C TJ = 55°C 0.1 TJ = 125°C 6.55 6.65 6.75 6.85 6.95 REVERSE VOLTAGE (V) 1.0 VIN 0.1 7.05 6.8k VOUT 2 0 10 100 1k 10k FREQUENCY (Hz) 129329 G01 INPUT 0 100k 0 100 200 300 TIME (µs) 400 129329 G03 129329 G02 Forward Characteristics 1.2 4 14 . 0.01 6.45 10 VOLTAGE (V) DYNAMIC IMPEDANCE (Ω) 6 Noise Voltage Low Frequency Noise Voltage 150 TA = 25°C 0.01Hz TO 1Hz 0.6 0.4 NOISE (10µV/DIV) 0.8 NOISE (nV/√Hz) FORWARD VOLTAGE (V) 1.0 100 0.2 0 0.001 0.01 0.1 1.0 FORWARD CURRENT (mA) 10 10 100 1k 10k 100k FREQUENCY (Hz) 129329 G04 4 50 129329 G05 0 50 150 100 TIME (SECONDS) 200 250 129329 G06 129329fd For more information www.linear.com/LM329 LM129/LM329 schematic diagram 1 50Ω Q2 15pF 1k D1 6.2V + Q6 Q5 Q3 2k 30pF Q4 Q7 10k Q1 30k 2k 2.6k 2 129329 SD – 129329fd For more information www.linear.com/LM329 5 LM129/LM329 Package Description 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) 0.085 – 0.105 (2.159 – 2.667) 0.500 (12.700) MIN REFERENCE PLANE * 0.025 (0.635) MAX 0.016 – 0.021** (0.406 – 0.533) DIA 0.050 (1.270) TYP 0.100 (2.540) TYP 0.050 (1.270) TYP PIN 1 FOR 3-LEAD PACKAGE ONLY 0.036 – 0.046 (0.914 – 1.168) 45° 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) OBSOLETE PACKAGE Z Package 3-Lead TO-92 (Similar to TO-226) (Reference LTC DWG # 05-08-1410) 0.180 ± 0.005 (4.572 ± 0.127) 0.060 ± 0.005 (1.524± 0.127) DIA 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) 0.098 +016/–0.04 (2.5 +0.4/–0.1) 2 PLCS Z3 (TO-92) 0401 TO-92 TAPE AND REEL REFER TO TAPE AND REEL SECTION OF LTC DATA BOOK FOR ADDITIONAL INFORMATION 10° NOM 6 129329fd For more information www.linear.com/LM329 LM129/LM329 Revision History (Revision history begins at Rev D) REV DATE DESCRIPTION D 12/14 Web Links Added Package/Order Information Updated Revision History Added PAGE NUMBER All 2 7 129329fd 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. For more information www.linear.com/LM329 7 LM129/LM329 Typical Application Common Reference Buffered Reference Using a Single Supply 15V 9V TO 40V RS 9k IMIN ≥ 0.6mA 7.5k 2 – 7 6 LT1001 LM329 3 6.9V LM329 6.9V 129329 TA02 + 10V 4 20k 1% 129329 TA03 Related Parts PART NUMBER DESCRIPTION COMMENTS LT1460 Micropower, Precise Series Reference 10ppm/°C, Output Voltages: 2.5V, 3V, 3.3V, 5V, 10V LT1634 0.05% Accurate, 10ppm/°C, Shunt Reference Output Voltages: 1.25V, 2.5V, 4.096V, 5V 8 129329fd Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 For more information www.linear.com/LM329 (408) 432-1900 ●● FAX: FAX: (408) (408)434-0507 434-0507 ●●www.linear.com/LM329 www.linear.com LT 1214 REV D • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 2008