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LM129/LM329 6.9V Precision Voltage Reference
FEATURES
s s s s
DESCRIPTIO
Guaranteed 10ppm/C Temperature Coefficient Guaranteed 1 Maximum Dynamic Impedance Guaranteed 20V Maximum Wideband Noise Wide Operating Current Range 0.6mA to 15mA
APPLICATIO S
s s s 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.
TYPICAL APPLICATIO
20mA Positive Current Source
20V REVERSE VOLTAGE CHANGE (mV) 20k 0.1% 174 0.1% 8
Reverse Voltage Change
TA = 25C 7 6 5 4 3 2 1 0 0 2 4 8 6 REVERSE CURRENT (mA) 10
LM329 6.95V
2
- +
7 LT1001 6
3 20k 0.1%
4 10k OUT 20mA
129/329 TA01
4.3k
U
129/329 TA01b
U
U
1
LM129/LM329
ABSOLUTE AXI U RATI GS U WW U W
(Note 1)
Operating Temperature Range LM129 (OBSOLETE) ................... -55C to 125C LM329 ..................................................... 0C to 70C Storage Temperature Range ................. - 65C to 150C
Lead Temperature (Soldering, 10 sec).................. 300C Reverse Breakdown Current ................................. 30mA Forward Current ..................................................... 2mA
PACKAGE/ORDER I FOR ATIO
BOTTOM VIEW
ORDER PART NUMBER LM129AH LM329AH LM129BH LM329BH LM129CH LM329CH LM329DH
H PACKAGE 2-LEAD TO-46 METAL CAN
TJMAX = 150C, JA = 440C/W, JC = 80C/W
OBSOLETE PACKAGE
Consider the Z Package for Alternate Source
Consult LTC Marketing for availability of LM329AZ,LM329CZ and LM329DZ
The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. (Note 2)
LM129A/ LM129B/LM129C MIN TYP MAX 6.7
q q q q q q q
ELECTRICAL CHARACTERISTICS
PARAMETER Reverse Breakdown Voltage Reverse Breakdown Voltage Change with Current Temperature Coefficient CONDITIONS
SYMBOL VZ VZ IR VZ Temp
TA = 25C, 0.6mA IR 15mA TA = 25C, 0.6mA IR 15mA 1mA IR 15mA IR = 1mA, LM129A/LM329A LM129A/LM329B LM129A/LM329C LM329D 1mA IR 15mA TA =25C, IR = 1mA 1mA IR 15mA TA =25C, 10Hz f 10kHz TA = 45C 0.1C, IR = 1mA 0.3%
Change in Temperature Coefficient rZ en VZ Time Dynamic Impedance RMS Noise Long Term Stability
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
2
U
BOTTOM VIEW
W
ORDER PART NUMBER LM329AZ LM329BZ LM329CZ LM329DZ
Z PACKAGE 3-LEAD PLASTIC TO-92 TJMAX = 150C, JA = 160C/W
LM329A/LM329B/ LM329C/LM329D MIN TYP MAX 6.6 6.9 9 12 6 15 30 50 1 7.25 20
UNITS V mV mV ppm/C ppm/C ppm/C ppm/C ppm/C
6.9 9 12 6 15 30
7.2 14
10 20 50
10 20 50 100
1 0.6 0.8 7 20 1 20
0.8 1 7 20
2 100
V ppm/kHr
Note 2: To determine the junction temperature as a function of the ambient temperature, see JA for each package.
LM129/LM329 TYPICAL PERFOR A CE CHARACTERISTICS
Reverse Characteristics
100
100 TA = 25C
10
DYNAMIC IMPEDANCE ()
REVERSE CURRENT (mA)
VOLTAGE (V)
1.0 Tj = 55C 0.1
Tj = 25C
Tj = 125C 0.01 6.45
.
6.55
6.65 6.75 6.85 6.95 REVERSE VOLTAGE (V)
Forward Characteristics
1.2 1.0 FORWARD VOLTAGE (V) NOISE (nV/Hz) 0.8 0.6 0.4 0.2 0 0.001 50 0.01 0.1 1.0 FORWARD CURRENT (mA) 10
129/329 G04
TA = 25C
100
10
100
1k FREQUENCY (Hz)
10k
100k
129/329 G05
NOISE (10V/DIV)
SCHE ATIC DIAGRA
50
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.
W
UW
7.05
129/329 G01
Dynamic Impedance
8 6
10
Response Time
OUTPUT
4 2 0 14
VIN
6.8k
VOUT
1.0
INPUT 0 100 200 300 TIME (s) 400
129/329 G03
0.1 10 100 1k 10k FREQUENCY (Hz) 100k
129/329 G02
0
Noise Voltage
150
Low Frequency Noise Voltage
0.01Hz TO 1Hz
0
50
150 100 TIME (s)
200
250
129/329 G06
W
1 Q2 D1 6.2V Q3 2k Q4 10k 30pF Q7 1k Q5 15pF Q6
+
-
3
LM129/LM329
TYPICAL APPLICATIO S
Common Reference
15V
9V TO 40V
9k
RS
IMIN 0.6mA
LM329
6.9V
LM329 6.9V
129/329 TA02
PACKAGE DESCRIPTIO
(Reference LTC DWG # 05-08-1340)
0.209 - 0.219 (5.309 - 5.537) 0.178 - 0.195 (4.521 - 4.953) 0.500 (12.700) MIN * 0.085 - 0.105 (2.159 - 2.667)
H Package 2-Lead and 3-Lead TO-46 Metal Can
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 PIN 1 FOR 3-LEAD PACKAGE ONLY 45 0.036 - 0.046 (0.914 - 1.168) 0.028 - 0.048 (0.711 - 1.219)
H02/03(TO-46) 1098
0.050 (1.270) TYP
*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
RELATED PARTS
PART NUMBER LT1460 LT1634 DESCRIPTION Micropower, Precise Series Reference 0.05% Accurate, 10ppm/C, Shunt Reference COMMENTS 10ppm/C, Output Voltages: 2.5V, 3V, 3.3V, 5V, 10V Output Voltages: 1.25V, 2.5V, 4.096V, 5V
4
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 q FAX: (408) 434-0507
q
U
U
Buffered Reference Using a Single Supply
7.5k
2
- +
7 LT1001 6 10V
3 20k 1%
4
129/329 TA03
Z Package 3-Lead Plastic TO-92 (Similar to TO-226)
(Reference 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)
0.90 (2.286) NOM
0.500 (12.70) MIN
0.050 UNCONTROLLED (1.270) LEAD DIMENSION MAX
5 NOM
0.050 (1.27) BSC
0.016 0.003 (0.406 0.076)
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
0.060 0.010 (1.524 0.254)
0.140 0.010 (3.556 0.127)
TO-92 TAPE AND REEL REFER TO TAPE AND REEL SECTION OF LTC DATA BOOK FOR ADDITIONAL INFORMATION
10 NOM
129329fa LT/CP 0901 1.5K REV A * PRINTED IN USA
www.linear.com
(c) LINEAR TECHNOLOGY CORPORATION 1985

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