LT1004
Micropower Voltage
Reference
FeaTures
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DescripTion
The
LT
®
1004
micropower voltage reference is a
2-terminal bandgap reference diode designed to provide
high accuracy and excellent temperature characteristics
at very low operating currents. Optimization of the key
parameters in the design, processing and testing of
the device results in accuracy specifications previously
attainable only with selected units. Below is a distribution
plot of reference voltage for a typical lot of LT1004-1.2.
Virtually all of the units fall well within the prescribed
limits of ±4mV.
The LT1004 is a pin-for-pin replacement for the
LM185/LM385 series of references with improved accu-
racy specifications. More important, the LT1004 is an
attractive device for use in systems where accuracy was
previously obtained at the expense of power consump-
tion and trimming.
For a low drift micropower reference with guaranteed tem-
perature coefficient, see the LT1034 data sheet.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog
Devices, Inc. All other trademarks are the property of their respective owners.
Guaranteed
± 4mV Initial Accuracy LT1004-1.2
Guaranteed
±20mV Accuracy LT1004-2.5
Guaranteed
10µA Operating Current
Guaranteed
Temperature Performance
Operates up to 20mA
Very Low Dynamic Impedance
applicaTions
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Portable Meter References
Portable Test Instruments
Battery-Operated Systems
Current Loop Instrumentation
Typical applicaTion
Micropower Cold Junction Compensation for Thermocouples
*
R1
3V
LITHIUM
LT1004-1.2
186
1.8k
1684
5k AT 25°C
†
NUMBER OF PARTS
Typical Distribution of
Reference Voltage (LT1004-1.2)
200
180
160
140
120
100
80
60
40
1200 PARTS
T
A
= 25°C
100k
+
THERMOCOUPLE
TYPE
J
K
T
S
+
–
R1
233k
299k
300k
2.1M
–
* QUIESCENT CURRENT
≅
15A
†
YELLOW SPRINGS INST. CO.
PART #44007
COMPENSATES WITHIN
±1°C FROM 0°C TO 60°C
1004 TA01
20
1.2325
1.2335
1.2345
1.2355
1.2365
1.2375
1.233
1.234
1.235
1.236
1.237
1004 TA02
1004fc
For more information
www.linear.com/LT1004
1
LT1004
absoluTe MaxiMuM raTings
(Note 1)
Reverse Breakdown Current ..................................30mA
Forward Current ................................................... 10mA
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ................. 300°C
Operating Temperature Range
LT1004M .......................................... –55°C to 125°C
LT1004I .............................................. –40°C to 85°C
LT1004C ................................................ 0°C to 70°C
pin conFiguraTion
BOTTOM VIEW
NC 1
1
2
NC 2
NC 3
GND 4
H PACKAGE
2-LEAD TO-46 METAL CAN
T
JMAX
= 150°C,
θ
JA
= 440°C/W,
θ
JC
= 80°C/W
TOP VIEW
8 V
OUT
7 NC
6 V
OUT
NC
5
(DO NOT USE)
BOTTOM VIEW
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 120°C/W
Z PACKAGE
3-LEAD PLASTIC TO-92
T
JMAX
= 150°C,
θ
JA
= 160°C/W
orDer inForMaTion
LEAD FREE FINISH
LT1004MH-2.5#PBF
LT1004CS8-1.2#PBF
LT1004CS8-2.5#PBF
LT1004IS8-1.2#PBF
LT1004IS8-2.5#PBF
LT1004CZ-1.2#PBF
LT1004CZ-2.5#PBF
LT1004IZ-1.2#PBF
LT1004IZ-2.5#PBF
TAPE AND REEL
LT1004MH-2.5#TRPBF
LT1004CS8-1.2#TRPBF
LT1004CS8-2.5#TRPBF
LT1004IS8-1.2#TRPBF
LT1004IS8-2.5#TRPBF
LT1004CZ-1.2#TRPBF
LT1004CZ-2.5#TRPBF
LT1004IZ-1.2#TRPBF
LT1004IZ-2.5#TRPBF
http://www.linear.com/product/LT1004#orderinfo
PART MARKING
0412
0425
0412I
0425I
PACKAGE DESCRIPTION
2-Lead TO-46 Metal Can
8-Lead Plastic S0
8-Lead Plastic S0
8-Lead Plastic S0
8-Lead Plastic S0
3-Lead Plastic TO-92
3-Lead Plastic TO-92
3-Lead Plastic TO-92
3-Lead Plastic TO-92
TEMPERATURE RANGE
–55°C to 125°C
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
Consult LTC Marketing for parts specified 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 specifications, go to:
http://www.linear.com/tapeandreel/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
2
1004fc
For more information
www.linear.com/LT1004
LT1004
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
C, I SUFFIXES
SYMBOL PARAMETER
V
Z
Reverse Breakdown Voltage
CONDITIONS
I
R
= 100µA
LT1004M: – 55°C ≤ T
A
≤ 125°C
LT1004C: 0°C ≤ T
A
≤ 70°C
LT1004I: –40°C ≤ T
A
≤ 85°C
I
MIN
≤ I
R
≤ 20mA (Note 3)
●
elecTrical characTerisTics
H SUFFIX
MIN
2.480
2.460
2.470
2.460
TYP
2.500
2.500
2.500
2.500
20
MAX
2.520
2.535
2.530
2.530
UNITS
V
V
V
V
ppm/°C
20
1.0
1.5
10
20
0.2
120
20
0.6
1.5
µA
mV
mV
mV
mV
Ω
Ω
µV
ppm/kHr
MIN
●
1.220
●
1.225
●
1.220
TYP
MAX
1.239
1.245
1.245
1.245
1.231 1.235
1.230
1.235
1.230
20
8
∆V
Z
∆Temp
I
MIN
∆V
Z
∆I
R
Average Temperature Coefficient
Minimum Operating Current
Reverse Breakdown Voltage
Change with Current
10
1.0
1.5
10
20
12
I
MIN
≤ I
R
≤ 1mA
1mA ≤ I
R
≤ 20mA
●
●
r
Z
e
n
∆V
Z
∆Time
Reverse Dynamic Impedance
Wide Band Noise (RMS)
Long Term Stability
I
R
= 100µA
I
R
= 100µA, 10Hz ≤ f ≤ 10kHz
I
R
= 100µA, T
A
= 25°C ± 0.1°C
0.2
●
0.6
1.5
60
20
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:
All specifications are for T
A
= 25°C unless otherwise noted.
Note 3:
Selected devices with guaranteed maximum temperature
coefficient are available upon request.
For MIL-STD components, please refer to LTC883C data sheet for test
listing and parameters.
1004fc
For more information
www.linear.com/LT1004
3
LT1004
Typical perForMance characTerisTics
Reverse Characteristics
100
–55°C TO 125°C
OUTPUT VOLTAGE CHANGE (mV)
16
Reverse Voltage Change
–55°C TO 125°C
FORWARD VOLTAGE (V)
1.2
Forward Characteristics
T
A
= 25°C
REVERSE CURRENT (µA)
12
10
0.8
8
1
4
0.4
0
0
0.01
1
10
0.1
REVERSE CURRENT (mA)
100
1004 G02
0.1
0
0.2
0.4 0.6 0.8
1.0
REVERSE VOLTAGE (V)
1.2
1.4
–4
0.01
0.1
1
10
FORWARD CURRENT (mA)
100
1004 G11
1004 G01
Temperature Drift
1.245
100
Reverse Dynamic Impedance
–55°C TO 125°C
f = 25Hz
DYNAMIC IMPEDANCE ( )
10k
Reverse Dynamic Impedance
T
A
= 25°C
I
R
= 100µA
1k
DYNAMIC IMPEDANCE ( )
REVERSE VOLTAGE (V)
1.240
10
100
1.235
10
1.230
1
1
1.225
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
1004 G04
0.1
0.01
0.1
0.1
1
10
REVERSE CURRENT (mA)
100
1004 G05
10
100
10k
1k
FREQUENCY (Hz)
100k
1M
1004 G06
Noise Voltage
700
600
500
NOISE (nV/Hz)
NOISE (nV/Hz)
400
300
200
100
0
10
100
1k
10k
FREQUENCY (Hz)
100k
1004 G07
Filtered Output Noise
I
R
= 100µA
T
A
= 25°C
70
60
50
40
30
20
10
0
100
1k
10k
FREQUENCY (Hz)
100k
1004 G08
Reponse Time
I
R
= 100µA
RC LOW PASS
100µA
R
C
VOLTAGE (V)
1.5
1.0
0.5
0
V
IN
OUTPUT
36k
V
OUT
5V
0
0
INPUT
100
TIME (µs)
500
600
1004 G09
4
1004fc
For more information
www.linear.com/LT1004
LT1004
perForMance characTerisTics
Reverse Characteristics
100
–55°C TO 125°C
FORWARD VOLTAGE (V)
1.2
Forward Characteristics
T
A
= 25°C
REVERSE CURRENT (µA)
10
0.8
1
0.4
0.1
0
0.5
1.0
1.5
2.0
REVERSE VOLTAGE (V)
2.5
3.0
1004 G10
0
0.01
0.1
1
10
FORWARD CURRENT (mA)
100
1004 G11
Temperature Drift
2.515
1000
Reverse Dynamic Impedance
f = 25Hz
–55°C TO 125°C
DYNAMIC IMPEDANCE ( )
10k
Reverse Dynamic Impedance
T
A
= 25°C
I
R
= 100µA
DYNAMIC IMPEDANCE ( )
REFERENCE VOLTAGE (V)
2.510
2.505
2.500
2.495
2.490
2.485
2.480
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
1004 G12
100
1k
100
10
10
1
1
0.1
0.01
1
10
0.1
REVERSE CURRENT (mA)
100
1004 G13
0.1
10
100
10k
1k
FREQUENCY (Hz)
100k
1M
1004 G14
Noise Voltage
1400
1200
INTEGRATED NOISE (µV)
1000
NOISE (nV/Hz)
800
600
400
200
0
10
100
1k
10k
FREQUENCY (Hz)
100k
1004 G15
Filtered Output Noise
120
100
80
60
40
20
0
100
I
R
= 100µA
100µA
R
C
Reponse Time
I
R
= 100µA
RC LOW PASS
VOLTAGE (V)
3
2
1
0
V
IN
OUTPUT
24k
V
OUT
5V
1k
10k
CUTOFF FREQUENCY (Hz)
100k
1004 G16
0
INPUT
100
TIME (µs)
500
1004 G17
1004fc
For more information
www.linear.com/LT1004
5
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