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| 型號(hào)： | LT1460DCN8-5#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 5 V, PDIP8 |
| 封裝： | 0.300 INCH, LEAD FREE, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 10/26頁 |
| 文件大?。?/td> | 1112K |
| 代理商： | LT1460DCN8-5#TRPBF |
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LT1460
1460fc
Table 1. Maximum Output Capacitance for LT1460S3
VOLTAGE
OPTION
IOUT = 100A IOUT = 1mA IOUT = 10mA IOUT = 20mA
2.5V
>10F
2F
0.68F
3V
>10F
2F
0.68F
3.3V
>10F
1F
0.68F
5V
>10F
1F
0.68F
10V
>10F
1F
0.15F
0.1F
Long-Term Drift
Long-termdriftcannotbeextrapolatedfromaccelerated
hightemperaturetesting.Thiserroneoustechniquegives
drift numbers that are wildly optimistic. The only way
long-term drift can be determined is to measure it over
the time interval of interest. The LT1460S3 long-term
drift data was taken on over 100 parts that were soldered
into PC boards similar to a “real world” application. The
boards were then placed into a constant temperature oven
with TA = 30°C, their outputs were scanned regularly and
measured with an 8.5 digit DVM. Figure 16 shows typical
long-term drift of the LT1460S3s.
Hysteresis
HysteresisdatashowninFigure17andFigure18represents
the worst-case data taken on parts from 0°C to 70°C and
from –40°C to 85°C. The device is capable of dissipating
relativelyhighpower,i.e.,fortheLT1460S3-2.5,PD=17.5V
20mA = 350mW. The thermal resistance of the SOT-23
package is 325°C/W and this dissipation causes a 114°C
internal rise producing a junction temperature of TJ=25°C
+ 114°C = 139°C. This elevated temperature will cause
the output to shift due to thermal hysteresis. For highest
performance in precision applications, do not let the
LT1460S3’s junction temperature exceed 85°C.
Figure 16. Typical Long-Term Drift
Figure 17. 0°C to 70°C Hysteresis
Figure 18. –40°C to 85°C Hysteresis
HOURS
–150
ppm
–50
50
150
–100
0
100
200
400
600
800
1460 F16
1000
100
0
300
500
700
900
HYSTERESIS (ppm)
–240
–160
–80
0
NUMBER
OF
UNITS
8
70°C TO 25°C
0°C TO 25°C
10
12
1460 F17
6
4
80
160
–200
–120
–40
40
120
200
2
0
18
16
14
240
WORST-CASE HYSTERESIS
ON 40 UNITS
HYSTERESIS (ppm)
–600
–400
–200
0
NUMBER
OF
UNITS
4
85°C TO 25°C
–40°C TO 25°C
5
6
1460 F18
3
2
200
400
–500
–300
–100
100
300
500
1
0
9
8
7
600
WORST-CASE HYSTERESIS
ON 34 UNITS
applications inForMation
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