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參數資料
| 型號： | ADR290GR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Low Noise Micropower Precision Voltage References |
| 中文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 2.048 V, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數： | 6/15頁 |
| 文件大小： | 199K |
| 代理商： | ADR290GR |
REV. B
ADR290/ADR291/ADR292
–6–
PARAMETER DEFINITION
Line Regulation
The change in output voltage due to a specified change in input
voltage. It includes 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. It includes the effects of self-heating. Load regulation
is expressed in either microvolts-per-milliampere, 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 high-temperature operating life test of 1000
hours at 125
°
C.
V
V
V
( )
–
V
ppm
V
t
V
V
(t
0
t
O
O
O
O
O
O
=
×
(t
–
0
(t
1
=
( )
O
[
]
10
6
Where
V
O
(t
0
)
= V
O
at 25
°
C at time 0
V
O
(t
1
)
= V
O
at 25
°
C after 1000 hours operation at 125
°
C
Temperature Coefficient
The change of output voltage over the operating temperature
change and normalized by the output voltage at 25
°
C, expressed
in ppm/
°
C. The equation follows:
TCV
ppm C
V T
(
25
V( )
T
) (
V
C
T
O
O
[
/
]
(
)
–
–
2
)
=
°
×
2
1
6
10
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
NC = No Connect
(There are in fact internal connections at NC pins which are
reserved for manufacturing purposes. Users should not connect
anything at NC pins.)
Thermal Hysteresis
Thermal hysteresis is defined as the change of output voltage af-
ter the device is cycled through temperature from +25
°
C to
–
40
°
C to +85
°
C and back to +25
°
C. This is a typical value from
a sample of parts put through such a cycle.
V
V
C
°
V
°
V
ppm
V
C
(
V
C
°
V
O HYS
–
O
O TC
_
)
–
25
O HYS
–
O
O TC
_
)
O
(
)
–
(
25
[
]
=
=
×
25
10
6
Where
V
O
(25
°
C
) = V
O
at 25
°
C
V
O–TC
= V
O
at 25
°
C after temperature cycle at +25
°
C to
–
40
C to +85
°
C and back to +25
°
C
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