LM136-2.5/LM336-2.5 - 2.5 Volt Reference

LM136-2.5/LM336-2.5
2.5V Reference
U
FEATURES
■
■
■
■
DESCRIPTIO
Guaranteed Temperature Stability
Maximum 0.6Ω Dynamic Impedance
Adjustable for Minimum Temperature Coefficient
Wide Operating Current Range
U
APPLICATIO S
■
■
■
■
■
Reference for 5V Systems
8-Bit A/D and D/A Reference
Digital Voltmeters
Current Loop Measurement and Control Systems
Power Supply Monitor
, LTC and LT are registered trademarks of Linear Technology Corporation.
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.
U
TYPICAL APPLICATIO
Reverse Voltage Change
2.5V Reference
3.5
TA = 25°C
3.6k
OUTPUT
LM336-2.5
10k*
TRIM
* DOES NOT AFFECT
TEMPERATURE
COEFFICIENT
REVERSE VOLTAGE CHANGE (mV)
5V TO 35V
3.0
2.5
2.0
1.5
1.0
0.5
136/336 TA01a
0
0
2
4
8
6
REVERSE CURRENT (mA)
10
136/336 TA01b
1
LM136-2.5/LM336-2.5
W W
U
W
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
U
W
U
PACKAGE/ORDER I FOR ATIO
BOTTOM VIEW
ADJ
+
ORDER PART
NUMBER
ADJ
–
H PACKAGE
3-LEAD TO-46 METAL CAN
TJMAX = 150°C, θJA = 440°C/W
(NOTE 2)
ORDER PART
NUMBER
BOTTOM VIEW
LM136H-2.5
LM136AH-2.5
LM336H-2.5
LM336AH-2.5
+
–
LM336Z-2.5
LM336BZ-2.5
Z PACKAGE
3-LEAD PLASTIC TO-92
TJMAX = 150°C, θJA = 160°C/W
(NOTE 2)
OBSOLETE PACKAGE
Consider the Z Packages for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 2)
SYMBOL
VZ
∆VZ
∆IR
rZ
PARAMETER
CONDITIONS
LM136/LM136A
MIN
TYP
MAX
MIN
Reverse Breakdown Voltage
TA = 25°C, IR = 1mA
LM136/LM336
LM136A/LM336B
2.440
2.465
2.390
2.440
Reverse Breakdown Change
with Current
Reverse Dynamic Impedance
2.490
2.490
2.540
2.515
LM336/LM336B
TYP
MAX
2.490
2.490
2.590
2.540
V
V
400µA ≤ IR ≤ 10mA
TA = 25°C
TMIN ≤ TA ≤ TMAX
●
2.6
3.0
6
10
2.6
3.0
10
12
mV
mV
IR = 1mA
TA =25°C
TMIN ≤ TA ≤ TMAX
●
0.2
0.4
0.6
1.0
0.2
0.4
1.0
1.4
Ω
Ω
●
12
18
1.8
6
∆VZ
∆Temp
Temperature Stability
VR Adjusted to 2.490V, IR = 1mA,
TMIN ≤ TA ≤ TMAX (See Figure 1)
∆VZ
∆Time
Long Term Stability
TA = 25°C ± 0.1°C, IR = 1mA
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.
20
20
V+
2.490V
R
1mA
*
D1†
5k
D2†
D1, D2 1N4148
* ADJUST TO 2.490
ANY SILICON
SIGNAL DIODE
†
136/336 F01
Figure 1. Adjusting the LM336 for
Minimum Temperature Coefficient
2
UNITS
mV
ppm/kHr
LM136-2.5/LM336-2.5
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Reverse Characteristics
Temperature Drift
Forward Characteristics
10 –1
1.2
2.59
Tj = 25°C
10 –3
Tj = 25°C
Tj = 125°C
10 –4
2.55
REVERSE VOLTAGE (V)
FORWARD VOLTAGE (V)
REVERSE CURRENT (A)
1.0
10 –2
0.8
0.6
0.4
2.53
2.51
2.49
2.47
2.45
2.43
2.41
0.2
Tj = –55°C
10 –5
0.6
1.0
IR = 1mA
2.57
2.39
1.8
2.2
1.4
REVERSE VOLTAGE (V)
0
0.001
2.6
0.01
0.1
1
FORWARD CURRENT (mA)
2.37
–55 –35 –15
10
5 25 45 65 85 105 125
TEMPERATURE (°C)
136/336 G02
136/336 G03
136/336 • G01
Dynamic Impedance
100
Response Time
Zener Noise Voltage
250
IR = 1mA
–55°C ≤ Tj ≤ 125°C
3.5
IR = 1mA
Tj = 25°C
3.0
OUTPUT
1
VOLTAGE SWING (V)
200
10
NOISE (nV/√Hz)
DYNAMIC IMPEDANCE (Ω)
2.5
150
100
2.0
1.5
5.1k
1.0
INPUT
0.5
0
OUTPUT
12
INPUT
8
4
0.1
10
100
1k
10k
FREQUENCY (Hz)
50
10
100k
100
1k
0
100k
10k
0
FREQUENCY (Hz)
136/336 G05
136/336 G04
1
TIME (µs)
20
136/336 G06
W
W
SCHE ATIC DIAGRA
+
Q17
50k
Q9
24k
24k
Q8
20pF
6.6k
Q7
10k
30pF
Q16
Q10
Q11
500Ω
Q15
Q2
30k
Q4
Q1
Q6
ADJ
Q12
Q3
Q5
Q13
2k
Q14
1.1k
6.6k
Q18
–
136/336 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.
3
LM136-2.5/LM336-2.5
U
TYPICAL APPLICATIO S
Switchable ±1.25V
Bipolar Reference
Low Temperature
Coefficient Power Regulator
Wide Supply
Range, Reference
Low Noise 2.5V Buffered Reference
1µF
5V
VIN
3.6V TO 40V
IN
LT317A
OUT
ADJ
VOUT
R
62Ω
R1
375Ω
1N4148
LM336-2.5
10k
1%
OUT
5k
2N3904
–5V
R2*
10k
LM336
*
*ADJUST R2
FOR 3.75V
ACROSS R1
1k
*LM336-2.5
–5V
–
3
+
7
*
136/336 TA04
6
2.5V
4
20µF
100k
+
1N4148
5k
136/336 TA03
1k
+
1N4148
500Ω
10k
2k
2
OP-07CH
10k
9.76k
1%
2N3906
1N4148
136/336 TA02
10k
1.2k
5V
V+
LM334
V–
VIN ≥ 6V
5k
20µF
136/336 TA05
*LM336Z-2.5
U
PACKAGE DESCRIPTIO
Z Package
3-Lead Plastic TO-92 (Similar to TO-226)
H Package
2-Lead and 3-Lead TO-46 Metal Can
(Reference LTC DWG # 05-08-1410)
(Reference LTC DWG # 05-08-1340)
0.209 – 0.219
(5.309 – 5.537)
0.178 – 0.195
(4.521 – 4.953)
0.085 – 0.105
(2.159 – 2.667)
0.500
(12.700)
MIN
REFERENCE
PLANE
0.90
(2.286)
NOM
0.180 ± 0.005
(4.572 ± 0.127)
*
0.025
(0.635)
MAX
0.016 – 0.021**
(0.406 – 0.533)
DIA
0.050
(1.270)
TYP
0.180 ± 0.005
(4.572 ± 0.127)
0.060 ± 0.005
(1.524± 0.127)
DIA
0.500
(12.70)
MIN
0.100
(2.540)
TYP
0.050
(1.270)
TYP
PIN 1
FOR 3-LEAD PACKAGE ONLY
0.016 ± 0.003
(0.406 ± 0.076)
0.050
(1.27)
BSC
0.015 ± 0.002
(0.381 ± 0.051)
0.098 +016/–0.04
(2.5 +0.4/–0.1)
2 PLCS
0.060 ± 0.010
(1.524 ± 0.254)
45°
0.028 – 0.048
(0.711 – 1.219)
0.036 – 0.046
(0.914 – 1.168)
5°
NOM
0.050 UNCONTROLLED
(1.270) LEAD DIMENSION
MAX
TO-92 TAPE AND REEL
REFER TO TAPE AND REEL SECTION OF
LTC DATA BOOK FOR ADDITIONAL INFORMATION
0.140 ± 0.010
(3.556 ± 0.127)
H02/03(TO-46) 1098
*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)
Z3 (TO-92) 0401
10° NOM
OBSOLETE PACKAGE
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1009
Precision 2.5V Shunt Reference
0.2% Max Initial Tolerance
4
Linear Technology Corporation
136336fa LT/CP 0801 1.5K REV A • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
 LINEAR TECHNOLOGY CORPORATION 1986