LM129/LM329 6.9V Precision Voltage Reference U FEATURES ■ ■ ■ ■ DESCRIPTIO Guaranteed 10ppm/°C Temperature Coefficient Guaranteed 1Ω Maximum Dynamic Impedance Guaranteed 20µV Maximum Wideband Noise Wide Operating Current Range 0.6mA to 15mA U APPLICATIO S ■ ■ ■ ■ Transducers A/D and D/A Converters Calibration Standards Instrumentation Reference The LM129 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. , LTC and LT are registered trademarks of Linear Technology Corporation. U TYPICAL APPLICATIO 20mA Positive Current Source Reverse Voltage Change 20V 8 – 7 LT1001 3 20k 0.1% 4.3k + REVERSE VOLTAGE CHANGE (mV) 2 LM329 6.95V TA = 25°C 174Ω 0.1% 20k 0.1% 6 4 10k OUT 20mA 129/329 TA01 7 6 5 4 3 2 1 0 0 2 4 8 6 REVERSE CURRENT (mA) 10 129/329 TA01b 1 LM129/LM329 W W U W ABSOLUTE AXI U RATI GS (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 U W U PACKAGE/ORDER I FOR ATIO BOTTOM VIEW H PACKAGE 2-LEAD TO-46 METAL CAN BOTTOM VIEW ORDER PART NUMBER Z PACKAGE 3-LEAD PLASTIC TO-92 LM329AZ LM329BZ LM329CZ LM329DZ ORDER PART NUMBER LM129AH LM329AH LM129BH LM329BH LM129CH LM329CH LM329DH TJMAX = 150°C, θJA = 440°C/W, θJC = 80°C/W TJMAX = 150°C, θJA = 160°C/W OBSOLETE PACKAGE Consider the Z Package for Alternate Source Consult LTC Marketing for availability of LM329AZ,LM329CZ and LM329DZ ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 2) PARAMETER CONDITIONS LM129A/ LM129B/LM129C MIN TYP MAX VZ Reverse Breakdown Voltage TA = 25°C, 0.6mA ≤ IR ≤ 15mA 6.7 ∆VZ ∆IR Reverse Breakdown Voltage Change with Current TA = 25°C, 0.6mA ≤ IR ≤ 15mA 1mA ≤ IR ≤ 15mA ● Temperature Coefficient IR = 1mA, LM129A/LM329A LM129A/LM329B LM129A/LM329C LM329D SYMBOL ∆VZ ∆Temp Change in Temperature Coefficient rZ en ∆VZ ∆Time Dynamic Impedance 6.6 UNITS 6.9 7.2 9 12 ● ● ● ● 6 15 30 1mA ≤ IR ≤ 15mA ● 1 TA =25°C, IR = 1mA 1mA ≤ IR ≤ 15mA 0.6 0.8 1 0.8 1 2 ● Ω Ω 20 7 100 µV RMS Noise TA =25°C, 10Hz ≤ f ≤ 10kHz 7 Long Term Stability TA = 45°C ±0.1°C, IR = 1mA ±0.3% 20 Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. 2 LM329A/LM329B/ LM329C/LM329D MIN TYP MAX 6.9 7.25 V 14 9 12 20 mV mV 10 20 50 6 15 30 50 10 20 50 100 ppm/°C ppm/°C ppm/°C ppm/°C 1 20 ppm/°C ppm/kHr Note 2: To determine the junction temperature as a function of the ambient temperature, see θJA for each package. LM129/LM329 U W TYPICAL PERFOR A CE CHARACTERISTICS Reverse Characteristics Response Time Dynamic Impedance 8 100 100 TA = 25°C OUTPUT 10 1.0 Tj = 25°C Tj = 55°C 0.1 10 6.65 6.75 6.85 6.95 REVERSE VOLTAGE (V) 0.1 7.05 10 100 1k 10k FREQUENCY (Hz) 129/329 G01 VOUT INPUT 0 100k 0 100 200 300 TIME (µs) 400 129/329 G03 129/329 G02 Forward Characteristics 1.2 6.8k 0 14 . 6.55 VIN 2 1.0 Tj = 125°C 0.01 6.45 4 VOLTAGE (V) DYNAMIC IMPEDANCE (Ω) REVERSE CURRENT (mA) 6 Low Frequency Noise Voltage 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 50 0.01 0.1 1.0 FORWARD CURRENT (mA) 10 10 100 1k 10k 100k 0 FREQUENCY (Hz) 129/329 G04 129/329 G05 50 150 100 TIME (µs) 200 250 129/329 G06 W W SCHE ATIC DIAGRA 1 50Ω Q2 D1 6.2V 1k + Q6 Q5 15pF Q3 2k 30pF Q4 Q7 10k Q1 30k 2k 2.6k 2 129/329 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 LM129/LM329 U TYPICAL APPLICATIO S Buffered Reference Using a Single Supply Common Reference 15V 9V TO 40V 9k IMIN ≥ 0.6mA RS 7.5k 2 – 7 LT1001 3 LM329 6.9V LM329 6.9V + 6 10V 4 20k 1% 129/329 TA02 129/329 TA03 U PACKAGE DESCRIPTIO H Package 2-Lead and 3-Lead TO-46 Metal Can Z Package 3-Lead Plastic TO-92 (Similar to TO-226) (Reference LTC DWG # 05-08-1340) (Reference LTC DWG # 05-08-1410) 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 * 0.180 ± 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) 0.025 (0.635) MAX 0.016 – 0.021** (0.406 – 0.533) DIA 0.050 (1.270) TYP 0.100 (2.540) TYP 0.500 (12.70) MIN 0.050 (1.270) TYP 0.050 UNCONTROLLED (1.270) LEAD DIMENSION MAX PIN 1 FOR 3-LEAD PACKAGE ONLY 45° 0.028 – 0.048 (0.711 – 1.219) 0.036 – 0.046 (0.914 – 1.168) 0.016 ± 0.003 (0.406 ± 0.076) 0.050 (1.27) BSC 0.060 ± 0.010 (1.524 ± 0.254) 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 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 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 4 Linear Technology Corporation 129329fa LT/CP 0901 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 1985