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LM236 2.5, LM336 2.5, LM336B 2.5
2.5 V INTEGRATED REFERENCE CIRCUITS
SLVS063E − NOVEMBER 1988 − REVISED OCTOBER 2003
D
Low Temperature Coefficient
D
Wide Operating Current . . . 400
µA
D
D
D
D
D
to 10 mA
0.27-Ω Dynamic Impedance
±1%
Tolerance Available
Specified Temperature Stability
Easily Trimmed for Minimum Temperature
Drift
Fast Turnon
NC
NC
NC
ANODE
D PACKAGE
(TOP VIEW)
1
2
3
4
8
7
6
5
CATHODE
NC
NC
ADJ
NC − No internal connection
LM336-2.5, LM336B-2.5 . . . LP PACKAGE
(TOP VIEW)
description/ordering information
The LM236-2.5, LM336-2.5, and LM336B-2.5
integrated circuits are precision 2.5-V shunt
regulator diodes. These
reference circuits
operate as low-temperature-coefficient 2.5-V
Zener diodes with a 0.2-Ω dynamic impedance. A
third terminal provided on the circuit allows the
reference voltage and temperature coefficient to
be trimmed easily.
ANODE
CATHODE
ADJ
The series is useful as precision 2.5-V low-voltage references (V
Z
) for digital voltmeters, power supplies, or
operational-amplifier circuitry. The 2.5-V voltage reference makes it convenient to obtain a stable reference from
5-V logic supplies. Devices in this series operate as shunt regulators, and can be used as either positive or
negative voltage references.
The LM236-2.5 is characterized for operation from −25°C to 85°C. The LM336-2.5 and LM336B-2.5 are
characterized for operation from 0°C to 70°C.
ORDERING INFORMATION
TA
PACKAGE†
Tube of 75
Reel of 2500
SOIC (D)
0°C to 70°C
TO-226 / TO-92 (LP)
Tube of 75
Reel of 2500
Bulk of 1000
Reel of 2000
Bulk of 1000
Reel of 2000
−25°C to 85°C
SOIC (D)
Tube of 75
Reel of 2500
ORDERABLE
PART NUMBER
LM336D-2-5
LM336DR-2-5
LM336BD-2-5
LM336BDR−2-5
LM336LP-2-5
LM336LPR-2-5
LM336BLP-2-5
LM336BLPR-2-5
LM236D-2-5
LM236DR-2-5
336B25
236-25
336-25
336B25
336-25
TOP-SIDE
MARKING
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright
2003, Texas Instruments Incorporated
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1
LM236 2.5, LM336 2.5, LM336B 2.5
2.5 V INTEGRATED REFERENCE CIRCUITS
SLVS063E − NOVEMBER 1988 − REVISED OCTOBER 2003
symbol
ANODE
ADJ
CATHODE
schematic diagram
CATHODE
Q14
Q11
24
kΩ
Q8
Q7
20 pF
10 kΩ
Q2
Q1
Q4
Q9
Q3
Q6
30 pF
24
kΩ
6.6 kΩ
Q10
500
Ω
30 kΩ
6.6 kΩ
Q12
Q5
720
Ω
Q13
ANODE
ADJ
NOTE A: All component values are nominal.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Reverse current, I
R
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Forward current, I
F
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mA
Package thermal impedance,
θ
JA
(see Notes 1 and 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W
LP package . . . . . . . . . . . . . . . . . . . . . . . . . . 140°C/W
Operating virtual junction temperature, T
J
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
Storage temperature range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. Maximum power dissipation is a function of TJ(max),
θ
JA, and TA. The maximum allowable power dissipation at any allowable
ambient temperature is PD = (TJ(max) − TA)/
θ
JA. Operating at the absolute maximum TJ of 150°C can impact reliability.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions
MIN
TA
Operating free-air temperature
LM236-2.5
LM336-2.5, LM336B-2.5
−25
0
MAX
85
70
UNIT
°C
2
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LM236 2.5, LM336 2.5, LM336B 2.5
2.5 V INTEGRATED REFERENCE CIRCUITS
SLVS063E − NOVEMBER 1988 − REVISED OCTOBER 2003
electrical characteristics at specified free-air temperature (unless otherwise noted)
PARAMETER
VZ
∆V
Z(∆T)
∆V
Z( I)
Z(∆I)
∆V
Z(∆t)
zz
Reference voltage
Change in reference
voltage with
temperature
Change in reference
voltage with current
Long-term change
in reference voltage
Reference
impedance
TEST CONDITIONS
LM236, LM336
IZ = 1 mA
LM336B
25°C
TA†
LM236-2.5
MIN
2.44
TYP
2.49
MAX
2.54
LM336-2.5
MIN
2.39
2.44
3.5
2.6
3
20
0.2
0.4
0.6
1
9
6
10
TYP
2.49
2.49
1.8
2.6
3
20
0.2
0.4
1
1.4
MAX
2.59
2.54
6
10
12
mV
ppm/khr
W
V
UNIT
VZ adjusted to 2.490 V,
IZ = 1 mA
IZ = 400
µA
to 10 mA
A
IZ = 1 mA
IZ = 1 mA,
f = 1 kHz
Full range
25°C
Full range
25°C
25°C
Full range
mV
† Full range is −25°C to 85°C for the LM236-2.5 and 0°C to 70°C for the LM336-2.5 and LM336B-2.5.
POST OFFICE BOX 655303
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3
LM236 2.5, LM336 2.5, LM336B 2.5
2.5 V INTEGRATED REFERENCE CIRCUITS
SLVS063E − NOVEMBER 1988 − REVISED OCTOBER 2003
TYPICAL CHARACTERISTICS
CHANGE IN REFERENCE VOLTAGE
vs
REFERENCE CURRENT
2.5
∆V
Z − Change in Reference Voltage − mV
TA = 25°C
Vn − Noise Voltage − nV/ Hz
2
250
IZ = 1 mA
TA = 25°C
200
NOISE VOLTAGE
vs
FREQUENCY
1.5
150
1
100
0.5
0
0
2
8
4
6
IZ − Reference Current − mA
10
50
10
100
1k
f − Frequency − Hz
10 k
100 k
Figure 1
REFERENCE IMPEDANCE
vs
FREQUENCY
100
IZ = 1 mA
TA = −55°C to 125°C
z z − Reference Impedance −
Ω
Figure 2
10
1
0.1
0.01
0.1
1
f − Frequency − kHz
10
100
Figure 3
4
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