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Linear Technology Electronic Components Datasheet


LM136-2.5

2.5Volt Reference



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LM136-2.5 pdf
LM136-2.5/LM336-2.5
2.5V Reference
FEATURES
s Guaranteed Temperature Stability
s Maximum 0.6Dynamic Impedance
s Adjustable for Minimum Temperature Coefficient
s Wide Operating Current Range
U
APPLICATIO S
s Reference for 5V Systems
s 8-Bit A/D and D/A Reference
s Digital Voltmeters
s Current Loop Measurement and Control Systems
s Power Supply Monitor
, LTC and LT are registered trademarks of Linear Technology Corporation.
DESCRIPTIO
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 perfor-
mance 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.
TYPICAL APPLICATIO
2.5V Reference
5V TO 35V
3.6k
LM336-2.5
OUTPUT
10k*
TRIM
* DOES NOT AFFECT
TEMPERATURE
COEFFICIENT
136/336 TA01a
Reverse Voltage Change
3.5
TA = 25°C
3.0
2.5
2.0
1.5
1.0
0.5
0
0 2 4 6 8 10
REVERSE CURRENT (mA)
136/336 TA01b
1



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LM136-2.5 pdf
LM136-2.5/LM336-2.5
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
UW U
PACKAGE/ORDER I FOR ATIO
BOTTOM VIEW
+
ADJ
ORDER PART
NUMBER
LM136H-2.5
LM136AH-2.5
LM336H-2.5
H PACKAGE
3-LEAD TO-46 METAL CAN
TJMAX = 150°C, θJA = 440°C/W
(NOTE 2)
LM336AH-2.5
OBSOLETE PACKAGE
Consider the Z Packages for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
BOTTOM VIEW
ADJ + –
Z PACKAGE
3-LEAD PLASTIC TO-92
TJMAX = 150°C, θJA = 160°C/W
(NOTE 2)
ORDER PART
NUMBER
LM336Z-2.5
LM336BZ-2.5
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 2)
SYMBOL PARAMETER
VZ Reverse Breakdown Voltage
VZ Reverse Breakdown Change
IR with Current
rZ Reverse Dynamic Impedance
VZ
Temp
VZ
Time
Temperature Stability
Long Term Stability
CONDITIONS
TA = 25°C, IR = 1mA
LM136/LM336
LM136A/LM336B
400µA IR 10mA
TA = 25°C
TMIN TA TMAX
IR = 1mA
TA =25°C
TMIN TA TMAX
VR Adjusted to 2.490V, IR = 1mA,
TMIN TA TMAX (See Figure 1)
TA = 25°C ± 0.1°C, IR = 1mA
LM136/LM136A
LM336/LM336B
MIN TYP MAX MIN TYP MAX
UNITS
2.440 2.490 2.540 2.390 2.490 2.590
2.465 2.490 2.515 2.440 2.490 2.540
V
V
2.6 6
q 3.0 10
2.6 10
3.0 12
mV
mV
0.2 0.6
q 0.4 1.0
0.2 1.0
0.4 1.4
q 12 18
20
1.8 6
mV
20 ppm/kHr
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.
V+
R
1mA
2.490V
* D1D1, D2 1N4148
5k * ADJUST TO 2.490
ANY SILICON
SIGNAL DIODE
D2
136/336 F01
Figure 1. Adjusting the LM336 for
Minimum Temperature Coefficient
2



Part Number LM136-2.5
Description 2.5Volt Reference
Maker Linear Technology - Linear Technology
Total Page 4 Pages
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