1
LT1004
Micropower Voltage
Reference
■
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
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 attain-
able 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
temperature coefficient, see the LT1034 data sheet.
Typical Distribution of
Reference Voltage (LT1004-1.2)
Micropower Cold Junction Compensation for Thermocouples
■
Portable Meter References
■
Portable Test Instruments
■
Battery-Operated Systems
■
Current Loop Instrumentation
FEATURES
APPLICATIO S
U
TYPICAL APPLICATIO
U
DESCRIPTIO
U
R1
100k
186Ω
3V
LITHIUM
1.8k
1004 TA01
*
5k AT 25°C
†
LT1004-1.2
1684Ω
THERMOCOUPLE
TYPE R1
J 233k
K 299k
T 300k
S 2.1M
*QUIESCENT CURRENT ≅ 15µA
†
YELLOW SPRINGS INST. CO.
PART #44007
COMPENSATES WITHIN
±1°C FROM 0°C TO 60°C
+
–
+
–
1.2325
1.233
1.2335
1.234
1.2345
1.235
1.2355
1.236
1.2365
1.237
1.2375
NUMBER OF PARTS
200
180
160
140
120
100
80
60
40
20
1004 TA02
1200 PARTS
T
A
= 25°C
, LTC and LT are registered trademarks of Linear Technology Corporation.
2
LT1004
(Note 1)
Reverse Breakdown Current ................................. 30mA
Forward Current .................................................. 10mA
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ABSOLUTE AXI U RATI GS
WWWU
Operating Temperature Range
LT1004M (OBSOLETE) .................... –55°C to 125°C
LT1004I ............................................. –40°C to 85°C
LT1004C................................................. 0°C to 70°C
PACKAGE/ORDER I FOR ATIO
UU
W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ORDER PART
NUMBER
T
JMAX
= 100°C, θ
JA
= 160°C/W
T
JMAX
= 100°C, θ
JA
= 150°C/W
BOTTOM VIEW
12
H PACKAGE
2-LEAD TO-46 METAL CAN
1
2
3
4
8
7
6
5
TOP VIEW
S8 PACKAGE
8-LEAD PLASTIC SO
NC
NC
NC
GND
V
OUT
NC
V
OUT
NC
(DO NOT USE)
BOTTOM VIEW
Z PACKAGE
3-LEAD PLASTIC TO-92
T
JMAX
= 150°C, θ
JA
= 440°C/W, θ
JC
= 80°C/W
0412
0425
0412I
0425I
LT1004CS8-1.2
LT1004CS8-2.5
LT1004IS8-1.2
LT1004IS8-2.5
S8 PART
MARKING
LT1004MH-1.2
LT1004MH-2.5 LT1004CZ-1.2
LT1004CZ-2.5
LT1004IZ-1.2
LT1004IZ-2.5
ORDER PART
NUMBER ORDER PART
NUMBER
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 2)
LT1004-1.2 LT1004-2.5
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
V
Z
Reverse Breakdown Voltage I
R
= 100µA 1.231 1.235 1.239 2.480 2.500 2.520 V
LT1004M: –55°C ≤ T
A
≤ 125°C●1.220 1.230 1.245 2.460 2.500 2.535 V
LT1004C: 0°C ≤ T
A
≤ 70°C●1.225 1.235 1.245 2.470 2.500 2.530 V
LT1004I: –40°C ≤ T
A
≤ 85°C●1.220 1.230 1.245 2.460 2.500 2.530 V
∆V
Z
Average Temperature Coefficient I
MIN
≤ I
R
≤ 20mA (Note 3) 20 20 ppm/°C
∆Temp
I
MIN
Minimum Operating Current ●810 1220 µA
∆V
Z
Reverse Breakdown Voltage I
MIN
≤ I
R
≤ 1mA 1.0 1.0 mV
∆I
R
Change with Current ●1.5 1.5 mV
1mA ≤ I
R
≤ 20mA 10 10 mV
●20 20 mV
r
Z
Reverse Dynamic Impedance I
R
= 100µA 0.2 0.6 0.2 0.6 Ω
●1.5 1.5 Ω
e
n
Wide Band Noise (RMS) I
R
= 100µA, 10Hz ≤ f ≤ 10kHz 60 120 µV
∆V
Z
Long Term Stability I
R
= 100µA, T
A
= 25°C ± 0.1°C 20 20 ppm/kHr
∆Time
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
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 LTC 883C data sheet for test
listing and parameters.
ELECTRICAL CHARACTERISTICS
LT1004CH-1.2
LT1004CH-2.5
OBSOLETE PACKAGE
Consider the SO-8 or Z Packages for Alternate Source
3
LT1004
FORWARD CURRENT (mA)
FORWARD VOLTAGE (V)
1.2
0.8
0.4
0
0.01 1 10 100
1004 G11
0.1
T
A
= 25°C
Forward Characteristics
Reverse Voltage Change
REVERSE CURRENT (mA)
OUTPUT VOLTAGE CHANGE (mV)
16
12
8
4
0
–4
0.01 1 10 100
1004 G02
0.1
–55°C TO 125°C
Reverse Dynamic Impedance
REVERSE CURRENT (mA)
DYNAMIC IMPEDANCE (Ω)
100
10
1
0.1
0.01 1 10 100
1004 G05
0.1
–55°C TO 125°C
f = 25Hz
FREQUENCY (Hz)
10
DYNAMIC IMPEDANCE (Ω)
10k
1k
100
10
1
0.1 100k
1004 G06
100 1k 10k 1M
T
A
= 25°C
I
R
= 100µA
Reverse Dynamic Impedance
Temperature Drift
Reverse Characteristics
REVERSE VOLTAGE (V)
0
REVERSE CURRENT (µA)
100
10
1
0.1 0.4 0.8 1.0
1004 G01
0.2 0.6 1.2 1.4
–55°C TO 125°C
Filtered Output Noise
Noise Voltage
FREQUENCY (Hz)
700
600
500
400
300
200
100
010 1k 10k 100k
1004 G07
100
NOISE (nV/√Hz)
IR = 100µA
TA = 25°C
FREQUENCY (Hz)
100
70
60
50
40
30
20
10
01k 10k 100k
1004 G08
IR = 100µA
NOISE (nV/√Hz)
R
C
100µA
RC LOW PASS
Reponse Time
(1.2V)
TEMPERATURE (°C)
–55
REVERSE VOLTAGE (V)
45
1.245
1.240
1.235
1.230
1.225
1004 G04
–35 125
–15 525 65
85 105
TIME (µs)
0
VOLTAGE (V)
500100 600
1004 G09
1.5
1.0
0.5
0
5V
0
36k
V
IN
V
OUT
OUTPUT
INPUT
TYPICAL PERFOR A CE CHARACTERISTICS
UW
4
LT1004
Reverse Dynamic Impedance Reverse Dynamic ImpedanceTemperature Drift
Filtered Output Noise
Noise Voltage Reponse Time
(2.5V)
FORWARD CURRENT (mA)
FORWARD VOLTAGE (V)
1.2
0.8
0.4
0
0.01 1 10 100
1004 G11
0.1
T
A
= 25°C
Forward Characteristics
TEMPERATURE (°C)
–55
REFERENCE VOLTAGE (V)
45
2.515
2.510
2.505
2.500
2.495
2.490
2.485
2.480
1004 G12
–35 125
–15 525 65
85 105
REVERSE CURRENT (mA)
DYNAMIC IMPEDANCE (Ω)
1000
100
10
1
0.1
0.01 1 10 100
1004 G13
0.1
f = 25Hz
–55°C TO 125°C
FREQUENCY (Hz)
10
DYNAMIC IMPEDANCE (Ω)
10k
1k
100
10
1
0.1 100k
1004 G14
100 1k 10k 1M
T
A
= 25°C
I
R
= 100µA
FREQUENCY (Hz)
1400
1200
1000
800
600
400
200
010 1k 10k 100k
1004 G15
100
NOISE (nV/√Hz)
IR = 100µA
CUTOFF FREQUENCY (Hz)
100
120
100
80
60
40
20
01k 10k 100k
1004 G16
IR = 100µA
INTEGRATED NOISE (µV)
R
C
100µA
RC LOW PASS
REVERSE VOLTAGE (V)
0
REVERSE CURRENT (µA)
100
10
1
0.1 0.5 1.0 1.5 2.0
1004 G10
2.5 3.0
–55°C TO 125°C
Reverse Characteristics
TIME (µs)
VOLTAGE (V)
500100
1004 G17
3
2
1
0
5V
0
24k
V
IN
V
OUT
OUTPUT
INPUT
TYPICAL PERFOR A CE CHARACTERISTICS
UW
5
LT1004
TYPICAL APPLICATIONS
U
Micropower 5V Reference
V
IN
≥ 8V
1µF
OUTIN 5V
1004 TA03
LT1004-2.5
300Ω
1%
100Ω
1%
LT338A
ADJ
+
High Stability 5V Regulator
V
IN
1µF
V
OUT
V
OUT
V
IN
V
–
1004 TA08
LT1004-1.2
120Ω
R1
LT338A
ADJ
+
10µF
2k
+
R1 ≤ V
–
– 1V
0.015
Variable Output Supply
Constant Gain Amplifier
Over Temperature
200k
250k
V
–
≤ –5V
V
+
≥ 5V
INPUT
OUTPUT
1004 TA07
60k
2N3904
250k
LT1004-1.2
Lead Acid Low-Battery Detector
–
+
LM4250
2
3
4
7
8
6
10M
12V
LO = BATTERY LOW
1004 TA14
LT1004-1.2
133k
1%
R1
†
1%
†
R1
SETS TRIP POINT, 60.4k
PER CELL FOR 1.8V/CELL
1M
BATTERY
OUTPUT
Ground Referenced Current Source
–
+
LT1007C
2
3
6
7
4
R
2k*
15V
–5VIOUT
LT1004-1.2
1004 TA04
*MAY BE INCREASED
FOR SMALL OUTPUT CURRENTS
IOUT = 1.235
R
R ≈ 2V
IOUT + 10µA
1M
1%
3.01M
1%
–
+
LM4250
2
3
4
8
6
7
22M
VIN
9V to 15V
VOUT
5V
1004 TA13
LT1004-1.2
5.6k
R
LM334
150pF
6
LT1004
TYPICAL APPLICATIONS
U
Q1
Q5
20pF 20pF
7.5k
500Ω500k 60k
300k
50k
200k
600k
Q3
Q11
Q10
Q9 Q14
–
+
Q8
Q6
Q4 Q12
Q13
1004-1.2 SD
LT1004-1.2
Q1
Q5
20pF 20pF
7.5k
500Ω
500k 60k
300k
500k
50k
200k
600k
Q3
Q11
Q10
Q9 Q14
–
+
Q8
Q6
Q4 Q12
Q13
1004-2.5 SD
500k
SCHE ATIC DIAGRA
WSW
LT1004-2.5
9V
1004 TA11
LT1004-1.2
510k
1.235V
Micropower Reference
from 9V Battery
VPP Generator for Eproms –– No Trim Required
0.05µF
12k
10k
2N3904
–
+
LM301A
2
3
4
8
1
6
7
16.9k*
OUT 21V
600µs RC
PER INTEL
SPEC
1004 TA15
LT1004-1.2
1.05k*
*1% METAL FILM RESISTORS
56k
22k
TTL INPUT
100pF
24V
24V
–5V
–5V
1.2V Reference from 1.5V Battery
1.5V*
1004 TA12
LT1004-1.2
3k
1.235V
*OUTPUT REGULATES
DOWN TO 1.285V
FOR I
OUT
= 0
2.5V Reference Low Noise Reference
5V
1004 TA10
LT1004-2.5
50k
2.500V
V
IN
≥ 5V
1004 TA09
LT1004-1.2
22Ω
50µF
100µA
OUTPUT
+
7
LT1004
0.050
(1.27)
BSC
0.060 ± 0.005
(1.524± 0.127)
DIA
0.90
(2.286)
NOM
0.180 ± 0.005
(4.572 ± 0.127)
0.180 ± 0.005
(4.572 ± 0.127)
0.500
(12.70)
MIN
0.050
(1.270)
MAX
UNCONTROLLED
LEAD DIMENSION
0.016 ± 0.003
(0.406 ± 0.076)
5°
NOM
0.015 ± 0.002
(0.381 ± 0.051)
0.060 ± 0.010
(1.524 ± 0.254)
10° NOM
0.140 ± 0.010
(3.556 ± 0.127)
Z3 (TO-92) 0401
0.098 +016/–0.04
(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
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 represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
H Package
2-Lead and 3-Lead TO-46 Metal Can
(Reference LTC DWG # 05-08-1340)
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)
0.100
(2.540)
TYP
45°
H02/03(TO-46) 1098
0.050
(1.270)
TYP
0.050
(1.270)
TYP
0.028 – 0.048
(0.711 – 1.219)
0.036 – 0.046
(0.914 – 1.168)
FOR 3-LEAD PACKAGE ONLY
0.016 – 0.021**
(0.406 – 0.533)
DIA
0.025
(0.635)
MAX
0.085 – 0.105
(2.159 – 2.667)
0.500
(12.700)
MIN
0.178 – 0.195
(4.521 – 4.953)
0.209 – 0.219
(5.309 – 5.537)
REFERENCE
PLANE *
LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE
AND 0.045" BELOW THE REFERENCE PLANE
FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS 0.016 – 0.024
(0.406 – 0.610)
*
**
PIN 1
0.016 – 0.050
(0.406 – 1.270)
0.010 – 0.020
(0.254 – 0.508)× 45°
0°– 8° TYP
0.008 – 0.010
(0.203 – 0.254)
SO8 1298
0.053 – 0.069
(1.346 – 1.752)
0.014 – 0.019
(0.355 – 0.483)
TYP
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
BSC
1234
0.150 – 0.157**
(3.810 – 3.988)
8765
0.189 – 0.197*
(4.801 – 5.004)
0.228 – 0.244
(5.791 – 6.197)
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
*
**
OBSOLETE PACKAGE
U
PACKAGE DESCRIPTIO
8
LT1004
1004fb LT/TP 0601 REV B 1.5K • PRINTED IN USA
LINEAR T ECHNOLOGY CORPORATION 1985
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LT1634 Micropower Precision Shunt Reference 10µA Operating Current, 10ppm/°C Maximum Drift, 0.05% Initial Accuracy
LT1460S3-2.5 Micropower Series Reference in SOT-23 100µA Operating Current, 20ppm/°C Maximum Drift, 0.2% Initial Accuracy
LT1790 Precision Micropower LDO Reference in SOT-23 10ppm/°C Max Drift, 0.05% Initial Accuracy
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
0°C to 100°C Linear Output Thermometer
–
+
1/2
LT1002
–
+
1/2
LT1002
4
3
13
R
T
NETWORK
YSI 44201
10k
0.1%
10k
0.1%
2.7k
5%
LT1004-1.2
15V
10
11
6
1004 TA05
V
OUT
0V TO10V
0°C TO 100°C
2765Ω
0.1%
168.3Ω
0.1%
NETWORK DETAIL
YSI 44201
BRN
RED
GRN
3.2k
6250Ω
10k
0.1%
Low Temperature Coefficient
2-Terminal Current Source
1004 TA06
LT1004-1.2
R ≤ 5k
LM334
R
6.8k
I
OUT
≈ 1.3V
R
TYPICAL APPLICATIO S
U
