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LT1004 Micropower Voltage Reference
FEATURES
s s s s s s
DESCRIPTION
The LT(R)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 accuracy specifications. More important, the LT1004 is an attractive device for use in systems where accuracy was previously obtained at the expense of power consumption and trimming. For a low drift micropower reference with guaranteed temperature coefficient, see the LT1034 data sheet.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Guaranteed 4mV Initial Accuracy LT1004-1.2 Guaranteed 20mV Accuracy LT1004-2.5 Guaranteed 10A Operating Current Guaranteed Temperature Performance Operates up to 20mA Very Low Dynamic Impedance
APPLICATIONS
s s s s
Portable Meter References Portable Test Instruments Battery-Operated Systems Current Loop Instrumentation
TYPICAL APPLICATION
Micropower Cold Junction Compensation for Thermocouples
200
100k 3V LITHIUM LT1004-1.2 186 1.8k * R1 1684 5k AT 25C
Typical Distribution of Reference Voltage (LT1004-1.2)
180 160 1200 PARTS TA = 25C
NUMBER OF PARTS
140 120 100 80 60 40
+
+ -
THERMOCOUPLE TYPE J K T S R1 233k 299k 300k 2.1M
-
* QUIESCENT CURRENT 15A YELLOW SPRINGS INST. CO. PART #44007 COMPENSATES WITHIN 1C FROM 0C TO 60C
1004 TA01
20
1.2325
1.2335
1.2345
1.2355
1.2365
1004 TA02
1.2375
1.233
1.234
1.235
1.236
1.237
U
U
U
1
LT1004
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PACKAGE/ORDER INFORMATION
BOTTOM VIEW
Reverse Breakdown Current ................................. 30mA Forward Current................................................... 10mA Operating Temperature Range LT1004M ......................................... - 55C to 125C LT1004I ............................................. - 40C to 85C LT1004C ................................................. 0C to 70C Storage Temperature Range ................ - 65C to 150C Lead Temperature (Soldering, 10 sec.)................ 300C
ORDER PART NUMBER
TJMAX = 150C JA = 440C/ W JC = 80C/ W
1
2
H PACKAGE 2-LEAD TO-46 METAL CAN
LT1004MH-1.2 LT1004MH-2.5 LT1004CH-1.2 LT1004CH-2.5 LT1004CZ-1.2 LT1004CZ-2.5 LT1004IZ-1.2 LT1004IZ-2.5 LT1004CS8-1.2 LT1004CS8-2.5 LT1004IS8-1.2 LT1004IS8-2.5 S8 PART MARKING 0412 0425 0412I 0425I
BOTTOM VIEW 3 2 1
TJMAX = 100C JA = 160C/ W
Z PACKAGE 3-LEAD PLASTIC TO-92
TOP VIEW NC 1 NC 2 NC 3 GND 4 8 VOUT 7 NC 6 VOUT 5 NC (DO NOT USE)
S8 PACKAGE 8-LEAD PLASTIC SO
TJMAX = 100C, JA = 150C/ W
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER VZ Reverse Breakdown Voltage
(Note 2)
LT1004-1.2 MIN TYP MAX 1.231 1.235 1.239 1.220 1.230 1.245 1.225 1.235 1.245 1.220 1.230 1.245 50
q
CONDITIONS IR = 100A LT1004M: - 55C TA 125C LT1004C: 0C TA 70C LT1004I: - 40C TA 85C IMIN IR 20mA (Note 3)
q q q
MIN 2.480 2.460 2.470 2.460
LT1004-2.5 TYP MAX 2.500 2.520 2.500 2.535 2.500 2.530 2.500 2.530 50
UNITS V V V V ppm/C
VZ Temp IMIN VZ IR
Average Temperature Coefficient Minimum Operating Current Reverse Breakdown Voltage Change with Current
8
10 1.0 1.5 10 20
12
20 1.0 1.5 10 20
IMIN IR 1mA
q
1mA IR 20mA
q
rZ en VZ Time
Reverse Dynamic Impedance Wide Band Noise (RMS) Long Term Stability
IR = 100A
q
0.2
0.6 1.5
0.2
0.6 1.5
IR = 100A 10Hz f 10kHz IR = 100A TA = 25C 0.1C
60 20
120 20
ppm/kHr
The q denotes the specifications which apply over the full operating temperature range. Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: All specifications are for TA = 25C unless otherwise noted.
Note 3: Selected devices with guaranteed maximum temperature coefficient are available upon request. For MIL-STD components, please refer to LTC 883C data sheet for test listing and parameters.
2
U
W
U
U
WW
W
A mV mV mV mV V
LT1004 TYPICAL PERFORMANCE CHARACTERISTICS (1.2V)
Reverse Characteristics
100 -55C TO 125C
OUTPUT VOLTAGE CHANGE (mV) REVERSE CURRENT (A)
10
FORWARD VOLTAGE (V)
1
0.1 0 0.2 0.4 0.6 0.8 1.0 REVERSE VOLTAGE (V) 1.2 1.4
Temperature Drift
1.245 100
DYNAMIC IMPEDANCE ()
10
DYNAMIC IMPEDANCE ()
1.240
REVERSE VOLTAGE (V)
1.235
1.230
1.225 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (C)
1004 G04
Noise Voltage
700 600 500
NOISE (nV/Hz)
IR = 100A TA = 25C
NOISE (nV/Hz)
400 300 200 100 0 10 100 1k 10k FREQUENCY (Hz) 100k
1004 G07
40 30 20 10 0 100
VOLTAGE (V)
UW
1004 G01
Reverse Voltage Change
16 -55C TO 125C 12
0.8 1.2
Forward Characteristics
TA = 25C
8
4
0.4
0
-4 0.01
1 10 0.1 REVERSE CURRENT (mA)
100
1004 G02
0 0.01
0.1 1 10 FORWARD CURRENT (mA)
100
1004 G11
Reverse Dynamic Impedance
10k
-55C TO 125C f = 25Hz
Reverse Dynamic Impedance
TA = 25C IR = 100A 1k
100
10
1
1
0.1 0.01
0.1 1 10 REVERSE CURRENT (mA)
100
1004 G05
0.1 10 100 10k 1k FREQUENCY (Hz) 100k 1M
1004 G06
Filtered Output Noise
70 IR = 100A 60 50 100A R C RC LOW PASS
1.5 1.0
Reponse Time
OUTPUT
36k 0.5 0 VIN VOUT
5V INPUT 0
1k 10k FREQUENCY (Hz)
100k
1004 G08
0
100 TIME (s)
500
600
1004 G09
3
LT1004 TYPICAL PERFORMANCE CHARACTERISTICS (2.5V)
Reverse Characteristics
100 -55C TO 125C
REVERSE CURRENT (A)
FORWARD VOLTAGE (V)
10
1
0.1
0
0.5
Temperature Drift
1000
2.515
DYNAMIC IMPEDANCE ()
100
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
DYNAMIC IMPEDANCE ()
REFERENCE VOLTAGE (V)
2.510
Noise Voltage
1400 IR = 100A 1200 100 120
INTEGRATED NOISE (V)
1000
NOISE (nV/Hz)
800 600 400 200 0 10 100 1k 10k FREQUENCY (Hz) 100k
1004 G15
VOLTAGE (V)
4
UW
Forward Characteristics
1.2 TA = 25C
0.8
0.4
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
Reverse Dynamic Impedance
10k
Reverse Dynamic Impedance
TA = 25C IR = 100A 1k
f = 25Hz -55C TO 125C
100
10
10
1
1
0.1 0.01
0.1
1 10 0.1 REVERSE CURRENT (mA)
100
1004 G13
10
100
10k 1k FREQUENCY (Hz)
100k
1M
1004 G14
Filtered Output Noise
IR = 100A 100A R C 60 40 20 0 100 3 2 1 0
Reponse Time
80
RC LOW PASS
OUTPUT 24k VOUT
VIN
5V INPUT 0 1k 10k CUTOFF FREQUENCY (Hz) 100k
1004 G16
100 TIME (s)
500
1004 G17
LT1004
TYPICAL APPLICATIONS
High Stability 5V Regulator
LT1338A VIN 8V IN OUT ADJ 300 1% LT1004-2.5 LT1004-1.2 100 1%
1004 TA03
+
1F
Constant Gain Amplifier Over Temperature
V + 5V 250k 250k
INPUT
2N3904 200k LT1004-1.2 60k V - -5V
1004 TA07
Lead Acid Low Battery Detector
BATTERY OUTPUT R1 1% 1M 3 12V
+ -
7 LM4250 6 8 4 10M LO = BATTERY LOW
133k 1%
2 LT 1004-1.2
R1 SETS TRIP POINT, 60.4k
PER CELL FOR 1.8V/CELL
U
Variable Output Supply
LT338A 5V VIN VIN VOUT ADJ 120 VOUT
+
1F
+
10F
1004 TA08
2k R1 V - - 1V R1 0.015 V-
Micropower 5V Reference
VIN 9V to 15V
LM334 R
OUTPUT
5.6k 3
+ -
4
7 LM4250 6 8 22M 150pF VOUT 5V 3.01M 1%
2 LT1004-1.2 1M 1%
1004 TA13
Ground Referenced Current Source
15V 2k*
LT1004-1.2 R 2
- +
4
7 6 IOUT =
1004 TA04
LT1007C 3
1004 TA14
IOUT
-5V
1.235 R 2V R IOUT + 10A
* MAY BE INCREASED FOR SMALL OUTPUT CURRENTS
5
LT1004
TYPICAL APPLICATIONS
VPP Generator for Eproms -- No Trim Required
100pF 24V 24V 1 22k 12k LT1004-1.2 10k TTL INPUT 56k -5V * 1% METAL FILM RESISTORS 2N3904 1.05k*
1004 TA15
0.05F
Micropower Reference from 9V Battery
9V
510k 1.235V LT1004-1.2
1004 TA11
SCHE ATIC DIAGRA
LT1004-1.2
7.5k Q4 Q3 20pF Q1 600k 20pF Q11 Q12
Q5 Q6 500k 500 60k Q8
6
SW
U
1.2V Reference from 1.5V Battery
1.5V*
3
+ -
8 7 6
600s RC PER INTEL SPEC OUT 21V
3k 1.235V LT1004-1.2
LM301A 2 4
16.9k* -5V
*OUTPUT REGULATES DOWN TO 1.285V FOR I OUT = 0
1004 TA12
2.5V Reference
5V
Low Noise Reference
VIN 5V 100A 22
50k 2.500V LT1004-2.5
1004 TA10
OUTPUT LT1004-1.2
+
50F
1004 TA09
W
LT1004-2.5
+
Q13
+
7.5k Q4 Q12 200k 20pF Q1 20pF Q11 50k 600k Q10 300k Q5 Q6 500k 60k
1004-2.5 SD
Q13
200k
Q3
50k Q10 300k Q9 Q14
500k
Q9 Q14 Q8 500k
500
-
1004-1.2 SD
-
LT1004
PACKAGE DESCRIPTION U
Dimensions in inches (millimeters) unless otherwise noted.
H Package 2-Lead and 3-Lead TO-46 Metal Can
(LTC DWG # 05-08-1340)
0.209 - 0.219 (5.309 - 5.537) 0.178 - 0.195 (4.521 - 4.953) 0.500 (12.700) MIN *
0.060 0.005 (1.524 0.127) DIA
Z Package 3-Lead Plastic TO-92 (Similar to TO-226)
(LTC DWG # 05-08-1410)
0.060 0.010 (1.524 0.254)
0.085 - 0.105 (2.159 - 2.667)
0.140 0.010 (3.556 0.127) 0.180 0.005 (4.572 0.127) 10 NOM
Z3 (TO-92) 0695
REFERENCE PLANE
0.025 (0.635) MAX
0.016 - 0.019** (0.406 - 0.483) DIA 0.050 (1.270) TYP 0.100 (2.540) TYP PIN 1 FOR 3-LEAD PACKAGE ONLY 45 0.036 - 0.046 (0.914 - 1.168) 0.028 - 0.048 (0.711 - 1.219)
H02/03(TO-46) 1197
0.180 0.005 (4.572 0.127)
0.90 (2.286) NOM
0.050 (1.270) TYP
0.500 (12.70) MIN 0.050 UNCONTROLLED (1.270) LEAD DIMENSION MAX
5 NOM
*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)
0.050 0.005 (1.270 0.127)
0.016 0.003 (0.406 0.076)
0.015 0.002 (0.381 0.051)
S8 Package 8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.189 - 0.197* (4.801 - 5.004) 0.010 - 0.020 x 45 (0.254 - 0.508) 0.008 - 0.010 (0.203 - 0.254) 0- 8 TYP 0.053 - 0.069 (1.346 - 1.752) 8 0.004 - 0.010 (0.101 - 0.254) 0.228 - 0.244 (5.791 - 6.197) 0.150 - 0.157** (3.810 - 3.988) 7 6 5
0.016 - 0.050 0.406 - 1.270
0.014 - 0.019 (0.355 - 0.483)
0.050 (1.270) TYP
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
1
2
3
4
SO8 0996
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.
7
LT1004
TYPICAL APPLICATIONS
0C to 100C Linear Output Thermometer
NETWORK DETAIL YSI 44201 BRN GRN 6250 15V 2.7k 5% RT NETWORK YSI 44201 RED 10k 0.1% 3.2k 4
LT1004-1.2
RELATED PARTS
PART NUMBER LT1634 LT1460S3-2.5 DESCRIPTION Micropower Precision Shunt Reference Micropower Series Reference in SOT-23 COMMENTS 10A Operating Current, 10ppm/C Maximum Drift, 0.05% Initial Accuracy 100A Operating Current, 20ppm/C Maximum Drift, 0.2% Initial Accuracy
8
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 q FAX: (408) 434-0507 q www.linear-tech.com
U
-
1/2 LT1002 13
2765 0.1%
10
+
1/2 LT1002 6
3
+
11 10k 0.1%
-
10k 0.1%
VOUT 0V TO10V 0C TO 100C
1004 TA05
168.3 0.1%
Low Temperature Coefficient 2-Terminal Current Source
LM334
R 6.8k R 5k LT1004-1.2
IOUT
1.3V R
1004 TA06
1004fa LT/TP 1198 REV A 2K * PRINTED IN USA
(c) LINEAR TECHNOLOGY CORPORATION 1985

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