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LM136-2.5/LM336-2.5 2.5V Reference
FEATURES
s s s s
DESCRIPTIO
Guaranteed Temperature Stability Maximum 0.6 Dynamic Impedance Adjustable for Minimum Temperature Coefficient Wide Operating Current Range
APPLICATIO S
s s s s s
Reference for 5V Systems 8-Bit A/D and D/A Reference Digital Voltmeters Current Loop Measurement and Control Systems Power Supply Monitor
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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
2.5V Reference
3.5
5V TO 35V 3.6k OUTPUT LM336-2.5 10k* TRIM * DOES NOT AFFECT TEMPERATURE COEFFICIENT
136/336 TA01a
TA = 25C
REVERSE VOLTAGE CHANGE (mV)
3.0 2.5 2.0 1.5 1.0 0.5 0 0 2 4 8 6 REVERSE CURRENT (mA) 10
U
Reverse Voltage Change
136/336 TA01b
U
U
1
LM136-2.5/LM336-2.5
ABSOLUTE
AXI U RATI GS
Operating Temperature Range LM136-2.5 (OBSOLETE) .............. -55C to 125C LM336-2.5 .............................................. 0C to 70C Storage Temperature Range ................. - 65C to 150C
PACKAGE/ORDER I FOR ATIO
BOTTOM VIEW
ORDER PART NUMBER LM136H-2.5 LM136AH-2.5 LM336H-2.5 LM336AH-2.5
ADJ
+ -
H PACKAGE 3-LEAD TO-46 METAL CAN TJMAX = 150C, JA = 440C/W (NOTE 2)
OBSOLETE PACKAGE
Consider the Z Packages for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. (Note 2)
SYMBOL VZ PARAMETER Reverse Breakdown Voltage CONDITIONS TA = 25C, IR = 1mA LM136/LM336 LM136A/LM336B 400A IR 10mA TA = 25C TMIN TA TMAX IR = 1mA TA =25C TMIN TA TMAX VR Adjusted to 2.490V, IR = 1mA, TMIN TA TMAX (See Figure 1) TA = 25C 0.1C, IR = 1mA LM136/LM136A MIN TYP MAX 2.440 2.465 2.490 2.490 2.6 3.0 0.2 0.4 12 20
V+ R 1mA * D1 5k D2
ELECTRICAL CHARACTERISTICS
VZ IR rZ
Reverse Breakdown Change with Current Reverse Dynamic Impedance
VZ Temp VZ Time
Temperature Stability Long Term Stability
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.
2
U
U
W
WW U
W
(Note 1)
Lead Temperature (Soldering, 10 sec).................. 300C Reverse Current .................................................... 15mA Forward Current ................................................... 10mA
BOTTOM VIEW ADJ
+
-
ORDER PART NUMBER LM336Z-2.5 LM336BZ-2.5
Z PACKAGE 3-LEAD PLASTIC TO-92
TJMAX = 150C, JA = 160C/W (NOTE 2)
MIN
LM336/LM336B TYP MAX 2.490 2.490 2.6 3.0 0.2 0.4 1.8 20 2.590 2.540 10 12 1.0 1.4 6
UNITS V V mV mV mV ppm/kHr
2.540 2.515 6 10 0.6 1.0 18
2.390 2.440
q
q q
2.490V D1, D2 1N4148 * ADJUST TO 2.490 ANY SILICON SIGNAL DIODE
136/336 F01
Figure 1. Adjusting the LM336 for Minimum Temperature Coefficient
LM136-2.5/LM336-2.5 TYPICAL PERFOR A CE CHARACTERISTICS
Reverse Characteristics
10 -1 1.2 1.0 FORWARD VOLTAGE (V) REVERSE CURRENT (A) REVERSE VOLTAGE (V) 10 -2 0.8 0.6 0.4 0.2 Tj = -55C 10 -5 0.6 1.0 1.8 2.2 1.4 REVERSE VOLTAGE (V) 2.6 0 0.001 0.01 0.1 1 FORWARD CURRENT (mA) 10
136/336 G02 136/336 * G01 136/336 G03
10 -3 Tj = 25C 10 -4 Tj = 125C
Dynamic Impedance
100 IR = 1mA -55C Tj 125C 250
DYNAMIC IMPEDANCE ()
NOISE (nV/Hz)
10
VOLTAGE SWING (V)
1
0.1 10 100 1k 10k FREQUENCY (Hz) 100k
136/336 G04
SCHE ATIC DIAGRA
Q1
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
Q2 Q3
Forward Characteristics
Tj = 25C 2.59 2.57 2.55 2.53 2.51 2.49 2.47 2.45 2.43 2.41 2.39
Temperature Drift
IR = 1mA
2.37 -55 -35 -15
5 25 45 65 85 105 125 TEMPERATURE (C)
Zener Noise Voltage
IR = 1mA Tj = 25C
Response Time
3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 12 8 4 INPUT OUTPUT 5.1k OUTPUT
200
150
100
INPUT
50 10
100
1k FREQUENCY (Hz)
10k
100k
136/336 G05
0
0
1 TIME (s)
20
136/336 G06
W
+
Q17 50k Q9 24k Q8 20pF Q7 10k 30pF Q10 Q11 Q15 30k Q4 Q6 Q12 Q13 Q14 6.6k ADJ Q16 500 24k 6.6k
Q5
2k
1.1k
Q18
-
136/336 SD
3
LM136-2.5/LM336-2.5
TYPICAL APPLICATIO S
Wide Supply Range, Reference
3.6V TO 40V V+ LM334 V-
Low Temperature Coefficient Power Regulator
VIN IN LT317A OUT ADJ VOUT 1.2k 5V
R 62
1N4148 LM336 R2* 10k 1N4148 *ADJUST R2 FOR 3.75V ACROSS R1
LM336-2.5
136/336 TA02
PACKAGE DESCRIPTIO
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) 0.500 (12.700) MIN * 0.085 - 0.105 (2.159 - 2.667)
REFERENCE PLANE
0.025 (0.635) MAX
0.500 (12.70) MIN 0.050 UNCONTROLLED (1.270) LEAD DIMENSION 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
0.050 (1.27) BSC
*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 LT1009 DESCRIPTION Precision 2.5V Shunt Reference COMMENTS 0.2% Max Initial Tolerance
136336fa LT/CP 0801 1.5K REV A * PRINTED IN USA
4
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 q FAX: (408) 434-0507
q
U
U
Switchable 1.25V Bipolar Reference
5V 5k
Low Noise 2.5V Buffered Reference
1F VIN 6V
10k
5k 2N3904
R1 375
-5V
10k 1% OUT 9.76k 1%
1k 10k 1N4148 1k
2
- +
7 OP-07CH 6 2.5V
3
* 2N3906 *LM336-2.5 5k -5V
+
* 100k 20F
4
500
10k
2k
136/336 TA03
+
20F *LM336Z-2.5
136/336 TA05
1N4148
136/336 TA04
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
5 NOM
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
www.linear.com
(c) LINEAR TECHNOLOGY CORPORATION 1986

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