LT1009
www.ti.com................................................................................................................................................................. SLVS013N – MAY 1987 – REVISED MAY 2009
2.5-V INTEGRATED REFERENCE CIRCUIT
FEATURES
1
•
•
•
•
•
•
Excellent Temperature Stability
Initial Tolerance: 0.2% Max
Dynamic Impedance: 0.6 Ω Max
D OR PW PACKAGE
(TOP VIEW)
NC
NC
NC
ANODE
1
8
2
7
3
6
4
5
Wide Operating Current Range
Directly Interchangeable With LM136
Needs No Adjustment for Minimum
Temperature Coefficient
LP PACKAGE
(TOP VIEW)
CATHODE
NC
CATHODE
ADJ
ANODE
CATHODE
ADJ
NC − No internal connection
DESCRIPTION/ORDERING INFORMATION
The LT1009 reference circuit is a precision-trimmed 2.5-V shunt regulator featuring low dynamic impedance and
a wide operating current range. The maximum initial tolerance is ±5 mV in the LP package and ±10 mV in the D
and PW packages. The reference tolerance is achieved by on-chip trimming, which minimizes the initial voltage
tolerance and the temperature coefficient, αVZ.
Although the LT1009 needs no adjustments, a third terminal (ADJ) allows the reference voltage to be adjusted
±5% to eliminate system errors. In many applications, the LT1009 can be used as a terminal-for-terminal
replacement for the LM136-2.5, which eliminates the external trim network.
The LT1009 uses include 5-V system references, 8-bit analog-to-digital converter (ADC) and digital-to-analog
converter (DAC) references, and power-supply monitors. The device also can be used in applications such as
digital voltmeters and current-loop measurement and control systems.
The LT1009C is characterized for operation from 0°C to 70°C. The LT1009I is characterized for operation from
–40°C to 85°C.
SYMBOL
ANODE
CATHODE
ADJ
1
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 the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1987–2009, Texas Instruments Incorporated
LT1009
SLVS013N – MAY 1987 – REVISED MAY 2009................................................................................................................................................................. www.ti.com
ORDERING INFORMATION (1)
PACKAGE (2)
TA
SOIC – D
0°C to 70°C
TO-226/TO-92 – LP
TSSOP – PW
SOIC – D
–40°C to 85°C
TO-226/TO-92 – LP
TSSOP – PW
(1)
(2)
ORDERABLE PART NUMBER
Tube of 75
LT1009CD
Reel of 2500
LT1009CDR
Bulk of 1000
LT1009CLP
Ammo of 2000
LT1009CLPM
Reel of 2000
LT1009CLPR
Tube of 150
LT1009CPW
Reel of 2000
LT1009CPWR
Tube of 75
LT1009ID
Reel of 2500
LT1009IDR
Bulk of 1000
LT1009ILP
Ammo of 2000
LT1009ILPM
Reel of 2000
LT1009ILPR
Tube of 150
LT1009IPW
Reel of 2000
LT1009IPWR
TOP-SIDE MARKING
1009C
LT1009C
1009C
1009I
LT1009I
1009I
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
SCHEMATIC
CATHODE
Q14
Q11
24 kΩ
24 kΩ
6.6 kΩ
Q8
20 pF
Q7
30 pF
Q10
10 kΩ
500 Ω
Q2
Q9
Q4
30 kΩ
ADJ
Q1
6.6 kΩ
Q6
Q3
Q12
Q5
720 Ω
Q13
ANODE
NOTE: All component values shown are nominal.
2
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Copyright © 1987–2009, Texas Instruments Incorporated
Product Folder Link(s): LT1009
LT1009
www.ti.com................................................................................................................................................................. SLVS013N – MAY 1987 – REVISED MAY 2009
ABSOLUTE MAXIMUM RATINGS (1)
over operating free-air temperature range (unless otherwise noted)
MIN
MAX
UNIT
IR
Reverse current
20
mA
IF
Forward current
10
mA
θJA
Package thermal impedance (2) (3)
TJ
Operating virtual junction temperature
Tstg
Storage temperature range
(1)
(2)
(3)
D package
97
LP package
140
PW package
149
–65
°C/W
150
°C
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.
Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient
temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
The package thermal impedance is calculated in accordance with JESD 51-7.
RECOMMENDED OPERATING CONDITIONS
TA
Operating free-air temperature range
LT1009C
LT1009I
MIN
MAX
0
70
–40
85
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Product Folder Link(s): LT1009
UNIT
°C
3
LT1009
SLVS013N – MAY 1987 – REVISED MAY 2009................................................................................................................................................................. www.ti.com
ELECTRICAL CHARACTERISTICS
at specified free-air temperature
PARAMETER
TA (1)
TEST CONDITIONS
D/PW package
VZ
Reference voltage
IZ = 1 mA
LP package
D/PW package
LP package
VF
Forward voltage
Full range
IF = 2 mA
MAX
MIN
TYP
MAX
2.49
2.5
2.51
2.49
2.5
2.51
2.495
2.5
2.5
2.505
2.505
2.495
2.485
2.515
2.475
2.525
2.491
2.509
2.48
2.52
0.4
1
0.4
1
Change in reference
voltage with
temperature
αVZ
Average temperature
coefficient of
reference voltage (2)
IZ = 1 mA, VADJ = open
ΔVZ
Change in reference
voltage with current
IZ = 400 µA to 10 mA
ΔVZ/Δt
Long-term change in
reference voltage
IZ = 1 mA
ZZ
Reference impedance IZ = 1 mA
125
125
45
45
25°C
IZ = 1 mA,
VADJ = 0.6 V to VZ – 0.6 V
ΔVZ(temp)
UNIT
V
V
mV
D/PW package
Full range
LP package
LT1009I
TYP
25°C
IZ = 1 mA,
VADJ = GND to VZ
Adjustment range
(1)
(2)
25°C
LT1009C
MIN
0°C to 70°C
15
5
15
4
15
25
–40°C to 85°C
25°C
2.6
Full range
10
15
25
20
35
2.6
12
25°C
20
25°C
0.3
Full range
6
10
1
0.3
ppm/
°C
mV
ppm/
khr
20
1.4
mV
1
1.4
Ω
Full range is 0°C to 70°C for the LT1009C and –40°C to 85°C for the LT1009I.
The deviation parameter VZ(dev) is defined as the difference between the maximum and minimum values obtained over the
recommended operating temperature range, measured at IZ = 1 mA. The average full-range temperature coefficient of the reference
voltage (αVZ) is defined as:
Maximum VZ
VZ(dev)
ppm
=
|aVZ|
°C
VZ at 25°C
× 10
VZ(dev) at IZ = 1 mA
6
Minimum VZ
DTA
DTA
αVZ can be positive or negative, depending upon whether the minimum VZ or maximum VZ, respectively, occurs at the lower
temperature.
For example, at IZ = 1 mA, maximum VZ = 2501 mV at 30°C, minimum VZ = 2497 mV at 0°C, VZ = 2500 mV at 25°C, ΔTA = 70°C for
LT1009C:
4 mV
|aVZ| =
2500 mV
70°C
6
× 10
» 23
ppm
°C
Because minimum VZ occurs at the lower temperature, the coefficient in this example is positive.
4
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Copyright © 1987–2009, Texas Instruments Incorporated
Product Folder Link(s): LT1009
LT1009
www.ti.com................................................................................................................................................................. SLVS013N – MAY 1987 – REVISED MAY 2009
TYPICAL CHARACTERISTICS
Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of
the various devices.
REFERENCE VOLTAGE
vs
FREE-AIR TEMPERATURE
CHANGE IN REFERENCE VOLTAGE
vs
REFERENCE CURRENT
2.53
5
∆V Z − Change in Reference Voltage − mV
Iz = 1 mA
V Z − Reference Voltage − V
2.52
2.51
2.5
2.49
2.48
2.47
−50
4
3
2
1
0
−25
0
25
50
75
100
TA − Free-Air Temperature − °C
125
0
4
8
12
16
IZ − Reference Current − mA
Figure 1.
Figure 2.
REVERSE CURRENT
vs
REVERSE VOLTAGE
FORWARD VOLTAGE
vs
FORWARD CURRENT
20
1.2
10−1
TJ = 25°C
1
V F − Forward Voltage − V
I R − Reverse Current − A
10−2
10−3
TJ = 125°C
10−4
TJ = −55°C
0.6
1
1.4
1.8
2.2
VR − Reverse Voltage − V
0.6
0.4
0.2
TJ = 25°C
10−5
0.8
2.6
0
0.001
Figure 3.
0.01
0.1
1
IF − Forward Current − mA
10
Figure 4.
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Product Folder Link(s): LT1009
5
LT1009
SLVS013N – MAY 1987 – REVISED MAY 2009................................................................................................................................................................. www.ti.com
TYPICAL CHARACTERISTICS (continued)
REFERENCE IMPEDANCE
vs
FREQUENCY
NOISE VOLTAGE
vs
FREQUENCY
100
250
Iz = 1 mA
TJ = 25°C
200
V n − Noise Voltage − nV/ Hz
ZZ − Reference Impedance − Ω
Iz = 1 mA
TJ = −55°C to 125°C
10
1
0.1
10
100
1k
10k
f − Frequency − Hz
150
100
50
10
100k
100
Figure 5.
1k
f − Frequency − Hz
Figure 6.
10k
100k
TRANSIENT RESPONSE
3.5
3
Output
Input and Output Voltages − V
2.5
2
1.5
1
0.5
5 kΩ
Input
0
Output
8
Input
4
0
0
1
20
t − Time − µs
Figure 7.
6
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Copyright © 1987–2009, Texas Instruments Incorporated
Product Folder Link(s): LT1009
LT1009
www.ti.com................................................................................................................................................................. SLVS013N – MAY 1987 – REVISED MAY 2009
APPLICATION INFORMATION
5 V to 35 V
3.6 kΩ
Output
10-kΩ
Trim
(see Note A)
LT1009
A.
This does not affect temperature coefficient. It provides ±5% trim range.
Figure 8. 2.5-V Reference
3.6 V to 40 V
V+
LM334 R
V−
62 Ω
Output
LT1009
10 kΩ
Figure 9. Adjustable Reference With Wide Supply Range
LT1084
VI
IN
10 µF
ADJ
OUT
VO
10 µF
1.2 kΩ
374 Ω
LT1009
2 kΩ
Figure 10. Power Regulator With Low Temperature Coefficient
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Copyright © 1987–2009, Texas Instruments Incorporated
Product Folder Link(s): LT1009
7
LT1009
SLVS013N – MAY 1987 – REVISED MAY 2009................................................................................................................................................................. www.ti.com
5V
5.1 kΩ
5V
5.1 kΩ
LT1009
10 kΩ
1%
−5 V
Output
9.76 kΩ
1%
500 Ω
5 kΩ
−5 V
Figure 11. Switchable ±1.25-V Bipolar Reference
1 µF
10 kΩ
VI ≥ 6 V
1 kΩ
−
10 kΩ
2.5 V
1 kΩ
+
+
100 kΩ
LT1009
+
LT1001C
20 µF
20 µF
Figure 12. Low-Noise 2.5-V Buffered Reference
8
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Copyright © 1987–2009, Texas Instruments Incorporated
Product Folder Link(s): LT1009
PACKAGE OPTION ADDENDUM
www.ti.com
11-Nov-2022
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
LT1009CD
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
1009C
Samples
LT1009CDR
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
1009C
Samples
LT1009CDRG4
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
1009C
Samples
LT1009CLP
ACTIVE
TO-92
LP
3
1000
RoHS & Green
SN
N / A for Pkg Type
0 to 70
LT1009C
Samples
LT1009CLPE3
ACTIVE
TO-92
LP
3
1000
RoHS & Green
SN
N / A for Pkg Type
0 to 70
LT1009C
Samples
LT1009CLPM
ACTIVE
TO-92
LP
3
2000
RoHS & Green
SN
N / A for Pkg Type
0 to 70
LT1009C
Samples
LT1009CLPR
ACTIVE
TO-92
LP
3
2000
RoHS & Green
SN
N / A for Pkg Type
0 to 70
LT1009C
Samples
LT1009CPWR
ACTIVE
TSSOP
PW
8
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
1009C
Samples
LT1009ID
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
1009I
Samples
LT1009IDR
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
1009I
Samples
LT1009ILP
ACTIVE
TO-92
LP
3
1000
RoHS & Green
SN
N / A for Pkg Type
-40 to 85
LT1009I
Samples
LT1009ILPR
ACTIVE
TO-92
LP
3
2000
RoHS & Green
SN
N / A for Pkg Type
-40 to 85
LT1009I
Samples
LT1009ILPRE3
ACTIVE
TO-92
LP
3
2000
RoHS & Green
SN
N / A for Pkg Type
-40 to 85
LT1009I
Samples
LT1009IPWR
ACTIVE
TSSOP
PW
8
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
1009I
Samples
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
11-Nov-2022
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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