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| 型號： | ADR395BUJZ-REEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | CONNECTOR ACCESSORY |
| 中文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 5 V, PDSO5 |
| 封裝： | LEAD FREE, MO-193AB, TSOT-23, 5 PIN |
| 文件頁數(shù)： | 8/20頁 |
| 文件大小： | 269K |
| 代理商： | ADR395BUJZ-REEL7 |
ADR390/ADR391/ADR392/ADR395
TERMINOLOGY
Temperature Coefficient
The change of output voltage with respect to operating temp-
erature changes normalized by the output voltage at 25°C. This
parameter is expressed in ppm/°C and can be determined by the
following equation:
(
(
25
°
O
C
V
Rev. F | Page 8 of 20
[
]
)
)
(
×
( )
–
T
)
6
10
–
×
=
°
1
2
O
2
O
O
T
V
T
V
C
/
ppm
TCV
where:
V
O
(25°C) =
V
O
at 25°C
V
O
(
T
1
) =
V
O
at Temperature 1
V
O
(
T
2
) =
V
O
at Temperature 2
Line Regulation
The change in output voltage due to a specified change in input
voltage. This parameter accounts for the effects of self-heating.
Line regulation is expressed in either percent per volt, parts-
per-million per volt, or microvolts per volt change in input
voltage.
Load Regulation
The change in output voltage due to a specified change in load
current. This parameter accounts for the effects of self-heating.
Load regulation is expressed in either microvolts per milli-
ampere, parts-per-million per milliampere, or ohms of dc
output resistance.
Long-Term Stability
Typical shift of output voltage at 25°C on a sample of parts
subjected to a test of 1,000 hours at 25°C.
V
O
=
V
O
(
t
0
) –
V
O
(
t
1
)
[
]
( )
V
( )
( )
×
=
6
10
–
O
O
O
O
V
V
ppm
V
where:
V
O
(
T
0
) =
V
O
at 25°C at Time 0
V
O
(
T
1
) =
V
O
at 25°C after 1,000 hours operation at 25°C
Thermal Hysteresis
The change of output voltage after the device is cycled through
temperatures from +25°C to –40°C to +125°C and back to
+25°C. This is a typical value from a sample of parts put
through such a cycle.
V
O_HYS
=
V
O
(25°C) –
V
O_TC
[
]
(
)
(
)
6
10
25
–
°
25
V
×
°
=
C
V
C
V
ppm
V
O
O_TC
O
O_HYS
where:
V
O
(25°C) =
V
O
at 25°C
V
O_TC
=
V
O
at 25°C after a temperature cycle from + 25°C
to –40°C to +125°C and back to +25°C
NOTES
Input Capacitor
Input capacitors are not required on the ADR39x. There is no
limit for the value of the capacitor used on the input, but a
1 μF to 10 μF capacitor on the input improves transient
response in applications where the supply suddenly changes.
An additional 0.1 μF in parallel also helps reduce noise
from the supply.
Output Capacitor
The ADR39x does not require output capacitors for stability
under any load condition. An output capacitor, typically 0.1 μF,
filters out any low level noise voltage and does not affect the
operation of the part. On the other hand, the load transient
response can improve with the addition of a 1 μF to 10 μF
output capacitor in parallel. A capacitor here acts as a source of
stored energy for a sudden increase in load current. The only
parameter that degrades by adding an output capacitor is the
turn-on time, and it depends on the size of the capacitor
chosen.
–150
D
150
TIME (Hours)
0
–100
–50
0
50
100
100
200
300
400
500
600
700
1000
0
900
800
Figure 2. ADR391 Typical Long-Term Drift over 1,000 Hours
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