LT1004ILP-1.2 [TI]
MICROPOWER INTEGRATED VOLTAGE REFERENCES; 微功耗内置电压参考
| 型号： | LT1004ILP-1.2 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | MICROPOWER INTEGRATED VOLTAGE REFERENCES |
| 文件： | 总13页 (文件大小：203K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1004-1.2, LT1004-2.5
MICROPOWER INTEGRATED VOLTAGE REFERENCES
SLVS022H – JANUARY 1989 – REVISED JULY 1999
D PACKAGE
(TOP VIEW)
Initial Accuracy
– ±4 mV for LT1004-1.2
– ±20 mV for LT1004-2.5
NC
NC
CATHODE
NC
1
2
3
4
8
7
6
5
Micropower Operation
Operates up to 20 mA
NC
CATHODE
NC
Very Low Reference Impedance
ANODE
Applications:
– Portable Meter Reference
– Portable Test Instruments
– Battery-Operated Systems
– Current-Loop Instrumentation
NC – No internal connection
Terminals 6 and 8 are internally connected.
LP PACKAGE
(TOP VIEW)
description
ANODE
The LT1004 micropower voltage reference is a
two-terminal band-gap reference diode designed
to provide high accuracy and excellent
temperature characteristics at very low operating
currents. Optimizing the key parameters in the
design, processing, and testing of the device
results in specifications previously attainable only
with selected units.
CATHODE
The LT1004 is a pin-for-pin replacement for the LM285 and LM385 series of references, with improved
specifications. It is an excellent device for use in systems in which accuracy was previously attained at the
expense of power consumption and trimming.
The LT1004C is characterized for operation from 0°C to 70°C. The LT1004I is characterized for operation from
–40°C to 85°C.
symbol
ANODE
(A)
CATHODE
(K)
AVAILABLE OPTIONS
PACKAGED DEVICES
SMALL
CHIP
FORM
(Y)
V
TYP
Z
T
A
PLASTIC
OUTLINE
(D)
(LP)
1.2 V
2.5 V
1.2 V
2.5 V
LT1004CD-1.2 LT1004CLP-1.2 LT1004Y-1.2
LT1004CD-2.5 LT1004CLP-2.5 LT1004Y-2.5
0°C to 70°C
LT1004ID-1.2
LT1004ID-2.5
LT1004ILP-1.2
LT1004ILP-2.5
—
—
–40°C to 85°C
For ordering purposes, the decimal point in the part number must be replaced with
a hyphen (e.g., show the -1.2 suffix as -1-2 and the -2.5 suffix as -2-5). The D
package is available taped and reeled. Add the R suffix to the device type (e.g.,
LT1004CDR-1-2). Chip forms are tested at 25°C.
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.
Copyright 1999, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LT1004-1.2, LT1004-2.5
MICROPOWER INTEGRATED VOLTAGE REFERENCES
SLVS022H – JANUARY 1989 – REVISED JULY 1999
schematic
LT1004-1.2
CATHODE
Q12
7.5 kΩ
200 kΩ
Q3
Q11
Q10
Q4
Q2
20 pF
600 kΩ
Q1
50 kΩ
20 pF
Q9
Q8
500 kΩ
Q5
300 kΩ
Q13
Q6
Q7
500 Ω
60 kΩ
ANODE
LT1004-2.5
CATHODE
Q12
7.5 kΩ
200 kΩ
Q3
Q11
Q10
Q4
Q2
500 kΩ
20 pF
Q1
50 kΩ
20 pF
Q9
Q8
600 kΩ
300 kΩ
500 kΩ
Q5
Q13
Q6
Q7
500 Ω
500 kΩ
60 kΩ
ANODE
NOTE A: All component values shown are nominal.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LT1004-1.2, LT1004-2.5
MICROPOWER INTEGRATED VOLTAGE REFERENCES
SLVS022H – JANUARY 1989 – REVISED JULY 1999
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Reverse current, I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA
R
Forward current, I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mA
F
Package thermal impedance, θ (see Notes 1 and 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W
JA
LP package . . . . . . . . . . . . . . . . . . . . . . . . . . 156°C/W
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
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.
NOTES: 1. Maximum power dissipation is a function of T (max), θ , and T . The maximum allowable power dissipation at any allowable
J
JA
A
ambient temperature is P = (T (max) – T )/θ . Operating at the absolute maximum T of 150°C can impact reliability.
D
J
A
JA
J
2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.
recommended operating conditions
MIN
0
MAX
70
UNIT
LT1004C
LT1004I
Operating free-air temperature, T
°C
A
–40
85
electrical characteristics at specified free-air temperature
LT1004-1.2
MIN TYP
1.231 1.235 1.239
LT1004-2.5
TEST
CONDITIONS
‡
PARAMETER
UNIT
T
A
MAX
MIN
TYP
MAX
2.52
2.53
2.53
25°C
LT1004C 1.225
LT1004I 1.225
2.48
2.47
2.47
2.5
V
Z
Reference voltage
I
Z
= 100 µA
1.245
1.245
V
Full
range
Average
temperature coefficient
of reference voltage
I
I
= 10 µA
= 20 µA
20
Z
25°C
ppm/°C
V
Z
§
20
Z
25°C
1
1.5
10
1
1.5
10
I
= I (min) to 1 mA
Z
Z
Change in
Full range
25°C
∆V
mV
reference voltage
with current
Z
I
= 1 mA to 20 mA
Z
Z
Full range
20
20
Long-term change
in reference voltage
∆V /∆t
I
= 100 µA
25°C
20
20
ppm/khr
Z
Minimum
reference current
I (min)
Z
Full range
8
10
12
20
µA
25°C
0.2
0.6
1.5
0.2
0.6
1.5
z
Reference impedance
I
I
= 100 µA
= 100 µA,
Ω
z
Z
Full range
Broadband
noise voltage
Z
V
25°C
60
120
µV
n
f = 10 Hz to 10 kHz
‡
§
Full range is 0°C to 70°C for the LT1004C and –40°C to 85°C for the LT1004I.
The average temperature coefficient of reference voltage is defined as the total change in reference voltage divided by the specified temperature
range.
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LT1004-1.2, LT1004-2.5
MICROPOWER INTEGRATED VOLTAGE REFERENCES
SLVS022H – JANUARY 1989 – REVISED JULY 1999
electrical characteristics, T = 25°C
A
LT1004Y-1.2
MIN TYP
LT1004Y-2.5
TEST
CONDITIONS
PARAMETER
UNIT
V
MAX
MIN
2.48
TYP
MAX
V
Z
Reference voltage
I
I
I
I
= 100 µA
= 10 µA
= 20 µA
= 100 µA
1.231 1.235 1.239
20
2.5
2.52
Z
Z
Z
Z
Average temperature coefficient
ppm/°C
V
†
Z
of reference voltage
20
20
∆V /∆t
Long-term change in reference voltage
Minimum reference current
Reference impedance
20
8
ppm/khr
Z
I (min)
Z
12
µA
z
I
I
= 100 µA
= 100 µA,
0.2
0.6
0.2
0.6
Ω
z
Z
Z
V
n
Broadband noise voltage
60
120
µV
f = 10 Hz to 10 kHz
†
The average temperature coefficient of reference voltage is defined as the total change in reference voltage divided by the specified temperature
range.
TYPICAL CHARACTERISTICS
Table of Graphs
GRAPH TITLE
FIGURE
LT1004x-1.2
Reverse current vs Reverse voltage
Reference-voltage change vs Reverse current
Forward voltage vs Forward current
Reference voltage vs Free-air temperature
Reference impedance vs Reference current
Noise voltage vs Frequency
1
2
3
4
5
6
7
Filtered output noise voltage vs Cutoff frequency
LT1004x-2.5
Transient response
8
Reverse current vs Reverse voltage
Forward voltage vs Forward current
Reference voltage vs Free-air temperature
Reference impedance vs Reference current
Noise voltage vs Frequency
9
10
11
12
13
14
15
Filtered output noise voltage vs Cutoff frequency
Transient response
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LT1004-1.2, LT1004-2.5
MICROPOWER INTEGRATED VOLTAGE REFERENCES
SLVS022H – JANUARY 1989 – REVISED JULY 1999
†
TYPICAL CHARACTERISTICS
LT1004x-1.2
REFERENCE-VOLTAGE CHANGE
LT1004x-1.2
REVERSE CURRENT
vs
vs
REVERSE CURRENT
REVERSE VOLTAGE
16
12
8
100
10
1
T
A
= –55°C to 125°C
T
A
= –55°C to 125°C
4
0
– 4
0.01
0.1
0.1
1
10
100
0
0.2
0.4
0.6
0.8
1
1.2
1.4
I
R
– Reverse Current – mA
V
R
– Reverse Voltage – V
Figure 1
Figure 2
LT1004x-1.2
LT1004x-1.2
REFERENCE VOLTAGE
vs
FREE-AIR TEMPERATURE
FORWARD VOLTAGE
vs
FORWARD CURRENT
1.245
1.24
1.2
I
Z
= 100 µA
T
A
= 25°C
1
0.8
1.235
1.23
0.6
0.4
0.2
0
1.225
–55 –35 –15
5
25
45
65
85 105 125
0.01
0.1
1
10
100
T
A
– Free-Air Temperature – °C
I
F
– Forward Current – mA
Figure 3
Figure 4
†
Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LT1004-1.2, LT1004-2.5
MICROPOWER INTEGRATED VOLTAGE REFERENCES
SLVS022H – JANUARY 1989 – REVISED JULY 1999
†
TYPICAL CHARACTERISTICS
LT1004x-1.2
REFERENCE IMPEDANCE
vs
LT1004x-1.2
NOISE VOLTAGE
vs
REFERENCE CURRENT
FREQUENCY
700
600
500
400
300
200
100
0
100
10
1
f = 25 Hz
I
= 100 µA
= 25°C
Z
T
= –55°C to 125°C
A
T
A
0.1
0.01
10
100
1 k
10 k
100 k
0.1
1
10
100
f – Frequency – Hz
I
– Reference Current – mA
Z
Figure 5
Figure 6
TL1004x-1.2
FILTERED OUTPUT NOISE VOLTAGE
LT1004x-2.5
TRANSIENT RESPONSE
vs
CUTOFF FREQUENCY
70
2
1.5
1
I
= 100 µA
= 25°C
Z
RC Low Pass
60
50
40
T
A
Output
100 µA
R
36 kΩ
C
V
I
V
O
0.5
0
30
20
10
0
5
0
Input
0.1
1
10
100
0
100
t – Time – µs
500
600
Cutoff Frequency – kHz
Figure 7
Figure 8
†
6
Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LT1004-1.2, LT1004-2.5
MICROPOWER INTEGRATED VOLTAGE REFERENCES
SLVS022H – JANUARY 1989 – REVISED JULY 1999
†
TYPICAL CHARACTERISTICS
LT1004x-2.5
FORWARD VOLTAGE
vs
LT1004x-2.5
REVERSE CURRENT
vs
FORWARD CURRENT
REVERSE VOLTAGE
1.2
100
10
1
T
A
= 25°C
T
A
= –55°C to 125°C
1
0.8
0.6
0.4
0.2
0
0.1
0.1
1
10
100
0.01
0
0.5
1
1.5
2
2.5
3
V
R
– Reverse Voltage – V
I
F
– Forward Current – mA
Figure 9
Figure 10
LT1004x-2.5
REFERENCE VOLTAGE
vs
FREE-AIR TEMPERATURE
2.52
I
Z
= 100 µA
2.515
2.51
2.505
2.5
2.495
2.49
2.485
2.48
2.475
–55 –35 –15
5
25
45
65
85 105 125
T
A
– Free-Air Temperature – °C
Figure 11
†
Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LT1004-1.2, LT1004-2.5
MICROPOWER INTEGRATED VOLTAGE REFERENCES
SLVS022H – JANUARY 1989 – REVISED JULY 1999
†
TYPICAL CHARACTERISTICS
LT1004x-2.5
NOISE VOLTAGE
vs
LT1004x-2.5
REFERENCE IMPEDANCE
vs
FREQUENCY
REFERENCE CURRENT
1400
1200
1000
800
1000
100
10
I
= 100 µA
= 25°C
Z
f = 25 Hz
= –55°C to 125°C
T
T
A
A
600
400
1
200
0
0.1
0.01
10
100
1 k
10 k
100 k
0.1
1
10
100
f – Frequency – Hz
I
– Reference Current – mA
Z
Figure 12
Figure 13
TL1004x-2.5
FILTERED OUTPUT NOISE VOLTAGE
vs
LT1004x-2.5
CUTOFF FREQUENCY
TRANSIENT RESPONSE
120
I
= 100 µA
= 25°C
Z
4
3
T
A
100
80
Output
RC Low Pass
2
1
100 µA
24 kΩ
R
V
I
V
O
60
40
20
C
0
5
0
Input
100
0
0.1
1
10
100
0
500
Cutoff Frequency – kHz
t – Time – µs
Figure 14
Figure 15
†
8
Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LT1004-1.2, LT1004-2.5
MICROPOWER INTEGRATED VOLTAGE REFERENCES
SLVS022H – JANUARY 1989 – REVISED JULY 1999
APPLICATION INFORMATION
100 pF
24 V
24 V
22 kΩ
600 µs RC
+
LM301A
Output
12 kΩ
21 V
–
†
16.9 kΩ
1.05 kΩ
LT1004-1.2
–5 V
0.05 µF
†
10 kΩ
2N3904
TTL Input
56 kΩ
–5 V
†
1% metal-film resistors
Figure 16. V
Generator for EPROMs (No Trim Required)
I(PP)
Network Detail
YSI 44201
Brown
RT Network
YSI 44201
Green
6250 Ω
302 kΩ
15 V
Red
2.7 kΩ
5%
2765 Ω
–
+
0.1%
1/2
10 kΩ
0.1%
+
–
TLE2022
1/2
TLE2022
0–10 V
LT1004-1.2
0°C–100°C
10 kΩ
0.1%
10 kΩ
0.1%
168.3 Ω
0.1%
Figure 17. 0°C-to-100°C Linear-Output Thermometer
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LT1004-1.2, LT1004-2.5
MICROPOWER INTEGRATED VOLTAGE REFERENCES
SLVS022H – JANUARY 1989 – REVISED JULY 1999
APPLICATION INFORMATION
V = 6.5 V to 15 V
I
V+
R
LM334
V–
5.6 kΩ
7
3
+
8
6
TLC271
V
O
= 5 V
2
–
4
3.01 MΩ
1%
150 pF
LT1004-1.2
1 MΩ
1%
Figure 18. Micropower 5-V Reference
V ≥ 5 V
I
9 V
100 µA
22 Ω
510 kΩ
Output
+
1.235 V
LT1004-1.2
LT1004-1.2
50 µF
Figure 19. Low-Noise Reference
Figure 20. Micropower Reference From 9-V Battery
†
100 kΩ
R1
3 V,
Lithium
1684 Ω
THERMOCOUPLE
TYPE
‡
5 kΩ at 25°C
R1
+
LT1004-1.2
J
K
T
S
232 kΩ
298 kΩ
301 kΩ
2.1 MΩ
187 Ω
1800 Ω
+
–
–
†
‡
Quiescent current 15 µA
Yellow Springs Inst. Co., Part #44007
NOTE A: This application compensates within ±1°C from 0°C to 60°C.
Figure 21. Micropower Cold-Junction Compensation for Thermocouples
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LT1004-1.2, LT1004-2.5
MICROPOWER INTEGRATED VOLTAGE REFERENCES
SLVS022H – JANUARY 1989 – REVISED JULY 1999
APPLICATION INFORMATION
LT1084
5 V
301 Ω
V ≥ 8 V
IN
OUT
I
+
5 V
ADJ
10 µF
+
1%
10 µF
50 kΩ
LT1004-2.5
2.5 V
LT1004-2.5
100 Ω
1%
Figure 22. 2.5-V Reference
Figure 23. High-Stability 5-V Regulator
V
CC+
≥ 5 V
250 kΩ
250 kΩ
15 V
†
2 kΩ
Output
LT1004-1.2
Input
–
R1
(see Note A)
TLE2027
+
2N3904
200 kΩ
I
O
(see Note A)
–5 V
LT1004-1.2
60 kΩ
†
May be increased for small output currents
V
≤ –5 V
CC–
2 V
+ 10 µA
1.235 V
R1
NOTE A: R1 ≈
, I
=
O
I
O
Figure 25. Amplifier With Constant Gain
Over Temperature
Figure 24. Ground-Referenced Current Source
V+
R
LM334
1.5 V (see Note A)
6.8 kΩ
3 kΩ
R ≤ 5 kΩ
1.235 V
LT1004-1.2
LT1004-1.2
1.3 V
R
I
≈
O
NOTE A: Output regulates down to 1.285 V for I = 0.
O
Figure 27. Terminal Current Source
With Low Temperature Coefficient
Figure 26. 1.2-V Reference From 1.5-V Battery
11
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LT1004-1.2, LT1004-2.5
MICROPOWER INTEGRATED VOLTAGE REFERENCES
SLVS022H – JANUARY 1989 – REVISED JULY 1999
APPLICATION INFORMATION
Battery Output
12 V
†
R1
1 MΩ
1%
+
TLC271
LO = Battery Low
–
133 kΩ
1%
LT1004-1.2
†
R1 sets trip point, 60.4 kΩ per cell for 1.8 V per cell
Figure 28. Lead-Acid Low-Battery-Voltage Detector
LT1084
V
I
V
I
V
O
V
O
+
ADJ
10 µF
120 Ω
+
10 µF
LT1004-1.2
2 kΩ
V – 1 V
CC
0.015
R1
R1 ≤
V
CC–
Figure 29. Variable-Voltage Supply
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
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DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
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Copyright 1999, Texas Instruments Incorporated
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