STMicroelectronics LM236AP 2.5v voltage reference Datasheet

LM236
LM336,B
2.5V VOLTAGE REFERENCES
■ LOW TEMPERATURE COEFFICIENT
■ WIDE OPERATING CURRENT OF 400µA
TO 10mA
■ 0.2Ω DYNAMIC IMPEDANCE
Z
TO92
(Plastic Package)
■ GUARANTEED TEMPERATURE STABILITY
■ FAST TURN-ON
D
SO8
(Plastic Micropackage)
DESCRIPTION
ORDER CODE
The LM236 and LM336 are precision 2.5V regulator diodes. These voltage reference monolithic ICs
operate like 2.5V zener diodes with a low temperature coefficient and a dynamic impedance of
0.2Ω. A third pin enables adjusting the reference
voltage and the temperature coefficient.
Package
Temperature
Range
Part Number
LM236
LM336,B
-25°C, +85°C
0°C, +70°C
Z
D
•
•
•
•
Z = TO92 Plastic package - also available in Bulk (Z), Tape & Reel (ZT)
and Ammo Pack (AP)
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONNECTIONS (top view)
SO8
(Top view)
TO92
(Top view)
ADJ
v+
v-
V+
NC
NC
ADJ
8
7
6
5
2
3
4
NC
NC
1
NC
May 2003
12345678-
NC
NC
NC
VADJ
NC
NC
V+
V+
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LM236 - LM336,B
SCHEMATIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
IR
IF
Toper
TStg
Parameter
LM236
LM336,B
Current
Reverse
Forward
Unit
15
10
Operating Free-air Temperature Range
mA
-25 to +85
Storage Temperature Range
0 to +70
°C
-65 to +150
°C
ELECTRICAL CHARACTERISTICS
LM236
Symbol
LM336,B
Parameter
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
2.44
2.49
2.54
2.39
2.44
2.49
2.49
2.59
2.54
V
Reverse Breakdown Voltage Change with Current
400µA ≤ IR ≤ 10mA
Tamb = +25°C
Tmin. ≤ Tamb ≤ Tmax.
2.6
3
6
10
2.6
3
10
12
mV
ZD
Reverse Dynamic Impedance (IR = 1mA)
Tamb = +25°C
Tmin. ≤ Tamb ≤ Tmax.
0.2
0.4
0.6
1
0.2
0.4
1
1.4
Ω
KVT
Temperature Stability (VR = 2.49V, IR = 1mA)
3.5
9
1.8
6
mV
KVH
Long Term Stability (Tamb = +25°C ±0.1°C, IR= 1mA)
20
VR
∆VR
2/10
Reference Breakdown Voltage
Tamb = +25°C, IR = 1mA
LM236, LM336
LM336B
20
ppm
LM236 - LM336,B
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LM236 - LM336,B
APPLICATION HINTS
The LM236, LM336 voltage references are easier
to use than zener diodes. Their low impedance
and wide current range facilitate biasing in any circuits. Besides, the breakdown voltage or the temperature coefficient can be adjusted so as to optimize the performance of the circuit.
Figure 1 represents a LM336 with a 10kΩ potentiometer to adjust the reverse breakdown voltage
which can be adjusted without altering the temperature coefficient of the circuit. The adjustment
range is generally sufficient to adjust the initial tolerance of the circuit and the inaccuracy of the amplifier circuit.
To obtain a lower temperature coefficient two diodes can be connected in series as indicated in
Figure 2.
When the circuit is adjusted to 2.49V the temperature coefficient is minimized.
For a correct temperature coefficient, the diodes
should be at the same ambient temperature as the
LM336. The value of R1 is not critical (2-20kΩ).
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LM236 - LM336,B
5/10
LM236 - LM336,B
6/10
LM236 - LM336,B
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LM236 - LM336,B
PACKAGE MECHANICAL DATA
SO-8 MECHANICAL DATA
DIM.
mm.
MIN.
TYP
inch
MAX.
MIN.
TYP.
MAX.
A
1.35
1.75
0.053
0.069
A1
0.10
0.25
0.04
0.010
A2
1.10
1.65
0.043
0.065
B
0.33
0.51
0.013
0.020
C
0.19
0.25
0.007
0.010
D
4.80
5.00
0.189
0.197
E
3.80
4.00
0.150
0.157
e
1.27
0.050
H
5.80
6.20
0.228
0.244
h
0.25
0.50
0.010
0.020
L
0.40
1.27
0.016
0.050
k
ddd
8˚ (max.)
0.1
0.04
0016023/C
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LM236 - LM336,B
PACKAGE MECHANICAL DATA - TO92 TAPE AMMO PACK & TO92 TAPE & REEL
TO-92 MECHANICAL DATA
DIM.
AL
A
T
d
I1
P
PO
P2
F1/F2
D h
D P
W
W0
W1
W2
H
H0
H1
DO
L1
MIN.
mm.
TYP
MAX.
5.0
5.0
4.0
MIN.
0.45
2.5
11.7
12.4
5.95
2.4
-1
-1
17.5
5.7
8.5
12.7
12.7
6.35
2.5
0
0
18.0
6
9
15.5
16
3.8
4.0
inches
TYP.
MAX.
0.197
0.197
0.157
0.018
13.7
13
6.75
2.8
1
1
19.0
6.3
9.75
0.5
20
16.5
25
4.2
11
0.098
0.461
0.488
0.234
0.094
-0.039
-0.039
0.689
0.224
0.335
0.500
0.500
0.250
0.098
0
0
0.709
0.236
0.354
0.610
0.630
0.150
0.157
0.539
0.512
0.266
0.110
0.039
0.039
0.748
0.248
0.384
0.020
0.787
0.650
0.984
0.165
0.433
Packing information are available at: http://www.st.com/stonline/prodpres/packages/stdlin.htm
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LM236 - LM336,B
PACKAGE MECHANICAL DATA - TO92 BULK
TO-92 MECHANICA DATA
mm.
mils
DIM.
MIN.
TYP
MAX.
MIN.
TYP.
MAX.
A
4.32
4.95
170.1
194.9
b
0.36
0.51
14.2
20.1
D
4.45
4.95
175.2
194.9
E
3.30
3.94
129.9
155.1
e
2.41
2.67
94.9
105.1
e1
1.14
1.40
44.9
55.1
L
12.7
15.49
500.0
609.8
R
2.16
2.41
85.0
94.9
S1
0.92
1.52
36.2
59.8
W
0.41
0.56
16.1
22.0
0102782/C
Packing information are available at: http://www.st.com/stonline/prodpres/packages/stdlin.htm
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
© 2003 STMicroelectronics - All Rights Reserved
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