LT1009 Series
1
1009ff
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
2.5V Reference
The LT
®
1009 is a precision trimmed 2.5V shunt regula-
tor diode featuring a maximum initial tolerance of only
±5mV. The low dynamic impedance and wide operating
current range enhances its versatility. The 0.2% reference
tolerance is achieved by on-chip trimming which not only
minimizes the initial voltage tolerance but also minimizes
the temperature drift.
Even though no adjustments are needed with the LT1009,
a third terminal allows the reference voltage to be adjusted
±5% to calibrate out system errors. In many applications,
the LT1009 can be used as a pin-to-pin replacement of the
LM136 and the external trim network eliminated.
For a lower drift 2.5V reference, see the LT1019 data
sheet.
2.5V Reference
n Reference for 5V Systems
n 8-Bit A/D and D/A Reference
n Digital Voltmeters
n Current Loop Measurement and Control Systems
n Power Supply Monitor
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
n Maximum Initial Tolerance: 0.2%
n
Guaranteed
Temperature Stability
n Maximum 0.6Ω Dynamic Impedance
n Wide Operating Current Range
n Directly Interchangeable with LM136 for Improved
Performance
n No Adjustments Needed for Minimum Temperature
Coeffi cient
n Available in 8-Lead SO and MSOP Packages and
3-Lead TO-92 Package
LT1009
OUTPUT
3.6k
5V TO 35V
10k*
TRIM
1009 TA01
*DOES NOT AFFECT
TEMPERATURE COEFFICIENT.
±5% TRIM RANGE
Output Voltage
TEMPERATURE (°C)
–50
REFERENCE VOLTAGE (V)
2.53
2.52
2.51
2.50
2.49
2.48
2.47 25 75
1009 TA02
–25 0 50 100 125
TYPICAL
GUARANTEED
MAXIMUM
GUARANTEED
MINIMUM
LT1009 Series
2
1009ff
ABSOLUTE MAXIMUM RATINGS
Reverse Current .....................................................20mA
Forward Current .....................................................10mA
Storage Temperature Range ...................–65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
(Note 1)
BOTTOM VIEW
ADJ +
–
H PACKAGE
3-LEAD TO-46 METAL CAN
TJMAX = 150°C, θJA = 440°C/W, θJC = 80°C/W
OBSOLETE PACKAGE
Consider the MS8, S8 or Z Packages for Alternate Source
1
2
3
4
NC
NC
NC
(–)
8
7
6
5
(+)
NC
(+)
ADJ
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 250°C/W
TOP VIEW
(+)
NC
(+)
ADJ
NC
NC
NC
(–)
S8 PACKAGE
8-LEAD PLASTIC SO
1
2
3
4
8
7
6
5
TJMAX = 150°C, θJA = 190°C/W
BOTTOM VIEW
Z PACKAGE
3-LEAD PLASTIC TO-92
–
+
ADJ
TJMAX = 100°C, θJA = 160°C/W
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1009MH#PBF LT1009MH#TRPBF 3-Lead TO-46 Metal Can –55°C to 125°C
LT1009CH#PBF LT1009CH#TRPBF 3-Lead TO-46 Metal Can 0°C to 70°C
LT1009CMS8#PBF LT1009CMS8#TRPBF LTQZ 8-Lead Plastic MSOP 0°C to 70°C
LT1009S8#PBF LT1009S8#TRPBF 1009 8-Lead Plastic SO 0°C to 70°C
LT1009IS8#PBF LT1009IS8#TRPBF 1009I 8-Lead Plastic SO –40°C to 85°C
LT1009CZ#PBF LT1009CZ#TRPBF 3-Lead Plastic TO-92 0°C to 70°C
LT1009IZ#PBF LT1009IZ#TRPBF 3-Lead Plastic TO-92 –40°C to 85°C
Operating Temperature Range
LT1009/LT1009C ...................................... 0°C to 70°C
LT1009I .............................................. –40°C to 85°C
LT1009M (OBSOLETE) ..................... –55°C to 125°C
LT1009 Series
3
1009ff
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at TA = 25°C.
LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1009MH LT1009MH#TR 3-Lead TO-46 Metal Can –55°C to 125°C
LT1009CH LT1009CH#TR 3-Lead TO-46 Metal Can 0°C to 70°C
LT1009CMS8 LT1009CMS8#TR LTQZ 8-Lead Plastic MSOP 0°C to 70°C
LT1009S8 LT1009S8#TR 1009 8-Lead Plastic SO 0°C to 70°C
LT1009IS8 LT1009IS8#TR 1009I 8-Lead Plastic SO –40°C to 85°C
LT1009CZ LT1009CZ#TR 3-Lead Plastic TO-92 0°C to 70°C
LT1009IZ LT1009IZ#TR 3-Lead Plastic TO-92 –40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
ORDER INFORMATION
TEMPERATURE PACKAGE STYLE
TEMPERATURE
ACCURACY
(%)
COEFFICIENT
(ppm/°C)
TO-46 (H)
OBSOLETE
MSOP-8
(MS8)
SO-8
(S8)
TO-92
(Z)
0°C to 70°C 0.20
0.40
25
25
LT1009CH
LT1009CMS8 LT1009S8
LT1009CZ
–40°C to 85°C 0.20
0.40
35
35 LT1009IS8
LT1009IZ
–55°C to 125°C 0.20 35 LT1009MH
AVAILABLE OPTIONS
SYMBOL PARAMETER CONDITIONS
LT100M LT1009I LT1009/LT1009C
UNITSMIN TYP MAX MIN TYP MAX MIN TYP MAX
VZReverse Breakdown
Voltage
TA = 25°C, IR = 1mA H, Z Pkg
MS, S Pkg
2.495 2.500 2.505 2.495
2.49
2.500
2.50
2.505
2.51
2.495
2.49
2.500
2.50
2.505
2.51
V
V
ΔVZ
ΔIR
Reverse Breakdown
Change with Current
400μA ≤ IR ≤ 10mA
l
2.6
3.0
6
10
2.6
3.0
10
12
2.6
3.0
10
12
mV
mV
rZReverse Dynamic
Impedance
IR = 1mA
l
0.2
0.4
0.6
1.0
0.2
0.4
1.0
1.4
0.2
0.4
1.0
1.4
Ω
Ω
Temperature Stability TMIN ≤ TA ≤ TMAX l15 15 1.8 4 mV
ΔVZ
ΔTemp
Average Temperature
Coeffi cient (Notes 2, 3)
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
–55°C ≤ TA ≤ 125°C
15
25
25
35
15 25
35
15 25 ppm/°C
ppm/°C
ppm/°C
ΔVZ
ΔTime
Long-Term Stability TA = 25°C ±0.1°C, IR = 1mA 20 20 20 ppm/kHr
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Guaranteed by Design.
Note 3: Average temperature coeffi cient is defi ned as the total voltage
change divided by the specifi ed temperature change.
LT1009 Series
4
1009ff
TYPICAL PERFORMANCE CHARACTERISTICS
Reverse Characteristics Forward Characteristics Reverse Voltage Change
Dynamic Impedance Output Noise Voltage Response Time
REVERSE VOLTAGE (V)
0.5
REVERSE CURRENT (A)
10–1
10–2
10–3
10–4
10–5
2.2
1009 G01
1.0 1.4 1.8 2.6
TJ = 125°C
TJ = –55°C
TJ = 25°C
FORWARD CURRENT (mA)
0.001
FORWARD VOLTAGE (V)
1.2
1.0
0.8
0.6
0.4
0.2
00.01 0.1 1 10
1009 G02
TJ = 25°C
REVERSE CURRENT (mA)
0
REVERSE VOLTAGE CHANGE (mV)
5
4
3
2
1
016
1009 G03
4812 20
FREQUENCY (Hz)
10
DYNAMIC IMPEDANCE (Ω)
100
10
1
0.1 100 1k 10k 100k
1009 G04
IR = 1mA
–55°C ≤ TJ ≤ 125°C
FREQUENCY (Hz)
10 100k
1009 G05
100 1k 10k
250
200
150
100
50
NOISE (nV/√Hz)
IR = 1mA
TJ = 25°C
TIME (μs)
0
VOLTAGE SWING (V)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
10
4
01
1009 G06
20
INPUT
OUTPUT
5k
INPUT
OUTPUT
LT1009 Series
5
1009ff
SCHEMATIC DIAGRAM
30pF
10k
20pF
Q11
24k
24k
720Ω
6.6k
6.6k
500Ω
ADJ
30k
+
–
1009 SD
Q8
Q2
Q1
Q6
Q10
Q7
Q3
Q12
Q13
Q9
Q7
Q4
Q5
TYPICAL APPLICATIONS
Wide Supply Range, Adjustable Reference Low Temperature Coeffi cient Power Regulator
LT1009
62Ω
V+
V–R
3.6V TO 40V
10k
1009 TA03
LM334
LT1009
375Ω
1.2k
VIN VOUT
2k
1009 TA04
LT317A
ADJ
IN OUT
Switchable ±1.25V Bipolar Reference
LT1009
OUT
5k
5V
5k
5V
–5V
–5V
10k
1%
9.76k
1%
500Ω
1009 TA05
5k
LT1009 Series
6
1009ff
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660)
PACKAGE DESCRIPTION
H Package
2-Lead and 3-Lead TO-46 Metal Can
(Reference LTC DWG # 05-08-1340)
OBSOLETE PACKAGE
.016 – .019**
(0.406 – 0.483)
DIA
.025
(0.635)
MAX
.085 – .105
(2.159 – 2.667)
.500
(12.700)
MIN
.178 – .195
(4.521 – 4.953)
.209 – .219
(5.309 – 5.537) .100
(2.540)
TYP
45o
H02/03(TO-46) 0801
.050
(1.270)
TYP
.050
(1.270)
TYP
.028 – .048
(0.711 – 1.219)
.036 – .046
(0.914 – 1.168)
FOR 3-LEAD PACKAGE ONLY
REFERENCE
PLANE SEATING*
PLANE
LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE
AND .050" BELOW THE REFERENCE PLANE
FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS .016 – .024
(0.406 – 0.610)
*
**
PIN 1
MSOP (MS8) 0307 REV F
0.53 p 0.152
(.021 p .006)
SEATING
PLANE
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
0.18
(.007)
0.254
(.010)
1.10
(.043)
MAX
0.22 – 0.38
(.009 – .015)
TYP
0.1016 p 0.0508
(.004 p .002)
0.86
(.034)
REF
0.65
(.0256)
BSC
0o – 6o TYP
DETAIL “A”
DETAIL “A”
GAUGE PLANE
12
34
4.90 p 0.152
(.193 p .006)
8765
3.00 p 0.102
(.118 p .004)
(NOTE 3)
3.00 p 0.102
(.118 p .004)
(NOTE 4)
0.52
(.0205)
REF
5.23
(.206)
MIN
3.20 – 3.45
(.126 – .136)
0.889 p 0.127
(.035 p .005)
RECOMMENDED SOLDER PAD LAYOUT
0.42 p 0.038
(.0165 p .0015)
TYP
0.65
(.0256)
BSC
LT1009 Series
7
1009ff
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 representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
PACKAGE DESCRIPTION
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
Z Package
3-Lead Plastic TO-92 (Similar to TO-226)
(Reference LTC DWG # 05-08-1410)
.016 – .050
(0.406 – 1.270)
.010 – .020
(0.254 – 0.508)× 45°
0°– 8° TYP
.008 – .010
(0.203 – 0.254)
SO8 0303
.053 – .069
(1.346 – 1.752)
.014 – .019
(0.355 – 0.483)
TYP
.004 – .010
(0.101 – 0.254)
.050
(1.270)
BSC
1234
.150 – .157
(3.810 – 3.988)
NOTE 3
8765
.189 – .197
(4.801 – 5.004)
NOTE 3
.228 – .244
(5.791 – 6.197)
.245
MIN .160 ±.005
RECOMMENDED SOLDER PAD LAYOUT
.045 ±.005
.050 BSC
.030 ±.005
TYP
INCHES
(MILLIMETERS)
NOTE:
1. DIMENSIONS IN
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
.050
(1.27)
BSC
.060 p .005
(1.524p 0.127)
DIA
.90
(2.286)
NOM
.180 p .005
(4.572 p 0.127)
.180 p .005
(4.572 p 0.127)
.500
(12.70)
MIN
.050
(1.270)
MAX
UNCONTROLLED
LEAD DIMENSION
.016 p .003
(0.406 p 0.076)
5o
NOM
BULK PACK
.015 p .002
(0.381 p 0.051)
.060 p .010
(1.524 p 0.254)
10oNOM
.140 p .010
(3.556 p 0.127)
Z3 (TO-92) 1008 REV C
321
.098 +.016/–.04
(2.5 +0.4/–0.1)
2 PLCS
TO-92 TAPE AND REEL
REFER TO TAPE AND REEL SECTION OF
LTC DATA BOOK FOR ADDITIONAL INFORMATION
LT1009 Series
8
1009ff
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
© LINEAR TECHNOLOGY CORPORATION 1985
LT 0109 REV F • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
Low Noise 2.5V Buffered Reference
LT1009
1k
VIN ≥ 6V
20μF
2.5V
10k
1k10k
100k
1μF
6
4
2
3
7
1009 TA06
–
+
LT1001C
+
20μF
+
PART NUMBER DESCRIPTION COMMENTS
LT1019 Precision Series Reference Bandgap, 0.05%, 5ppm/°C
LT1236 Precision Series Reference 5V and 10V Zener-Based 5ppm/°C, SO-8 Package
LTC
®
1798 Micropower Low Dropout Series Reference 0.15% Max, 6.5μA Supply Current
LT1460 Micropower Precision Series Reference Bandgap, 130μA Supply Current 10ppm/°C, Available in SOT-23
LT1634 Micropower Precision Shunt Voltage Reference Bandgap 0.05%, 10ppm/°C, 10μA Supply Current
LT1461 Micropower Precision Series Reference 0.04% Max, 3ppm/°C Max, 35μA Supply Current
