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61AI33 View Datasheet(PDF) - Linear Technology

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61AI33 Datasheet PDF : 16 Pages
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LT1461
ELECTRICAL CHARACTERISTICS
Note 8: Long-term drift typically has a logarithmic characteristic and
therefore, changes after 1000 hours tend to be much smaller than before
that time. Total drift in the second thousand hours is normally less than
one third that of the first thousand hours with a continuing trend toward
reduced drift with time. Long-term drift will also be affected by differential
stresses between the IC and the board material created during board
assembly. See the Applications Information section.
Note 9: Hysteresis in output voltage is created by package stress that
depends on whether the IC was previously at a higher or lower
temperature. Output voltage is always measured at 25°C, but the IC is
cycled hot or cold before successive measurements. Hysteresis is roughly
proportional to the square of the temperature change. Hysteresis is not
normally a problem for operational temperature excursions where the
instrument might be stored at high or low temperature. See Applications
Information section.
TYPICAL PERFOR A CE CHARACTERISTICS Characteristic curves are similar for most LT1461s.
Curves from the LT1461-2.5 and the LT1461-5 represent the extremes of the voltage options. Characteristic curves for other output
voltages fall between these curves and can be estimated based on their output.
2.5V Reference Voltage
vs Temperature
2.5020
TEMPCO –60°C TO 120°C
2.5015 3 TYPICAL PARTS
2.5010
2.5005
2.5000
2.4995
2.4990
2.4985
2.4980
– 60 – 40 – 20 0 20 40 60 80 100 120
TEMPERATURE (°C)
1461 G01
2.5V Minimum Input/Output
Voltage Differential vs Load Current
10
2.5V Load Regulation
1600
VIN = 7.5V
1200
800
125°C
25°C
400
– 55°C
0
0.1
1
10
100
OUTPUT CURRENT (mA)
1461 G02
2.5V Supply Current
vs Input Voltage
1000
1
0.1
0.1
125°C
25°C
– 55°C
1
10
OUTPUT CURRENT (mA)
100
1461 G04
100
125°C 25°C
– 55°C
10
0
5
10
15
20
25
INPUT VOLTAGE (V)
1461 G05
2.5V Line Regulation
vs Temperature
0
–1
–2
–3
–4
–5
–6
–7 SUPPLY = 15V
5V – 20V
–8
–40 – 20 0 20 40 60 80
TEMPERATURE (°C)
100 120
1461 G03
2.5V Ripple Rejection Ratio
vs Frequency
100
90
80
70
60
50
40
30
20
10
0
0.01
0.1
1
10 100 1000
FREQUENCY (kHz)
1641 G06
4
 

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