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| 型號： | IP431AC |
| 英文描述： | Programmable Precision Reference(2.5V-36V)(可調(diào)精密電壓基準(zhǔn)(2.5V-36V)) |
| 中文描述： | 可編程精密參考電壓（2.5V - 36V的）（可調(diào)精密電壓基準(zhǔn)電壓（2.5V - 36V的）） |
| 文件頁數(shù)： | 4/4頁 |
| 文件大小： | 33K |
| 代理商： | IP431AC |
IP431CSM4
Prelim. 4/98
Semelab plc.
Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail:
sales@semelab.co.uk
Website:
http://www.semelab.co.uk
FIGURE 2
TEST CIRCUIT FOR V
KA
> V
REF
FIGURE 3
TEST CIRCUIT FOR I
off
FIGURE 1
TEST CIRCUIT FOR V
KA
= V
REF
|Z
ka
|
|Z
ka
| 1+R1
NOTE 1
The deviation parameter
D
V
REF
is defined as the differences between
the maximum and minimum values obtained over the full operating
ambient temperature range that applies.
The average temperature coefficient of the reference input voltage,
μ
V
REF
is defined as:
D
V
REF
( )
x 10
6
ppm
V
@ 25
°
C
μ
V
REF
= =
°
C
D
T
A
μ
V
REF
can be positive or negative depending on whether
μ
V
REF
Min
or
μ
V
REF
Max occurs at the lower ambient temperature.
REF
V
Min
REF
V
Max
T1
T2
AMBIENT TEMPERATURE
D
V
REF
x 10
6
=
D
T
A
(V
REF
@ 25
°
C)
Example:
D
V
REF
= 8.0 mV and slope is positive,
V
REF
@ 25
°
C = 2.495V,
D
T
A
= 70
°
C
0.008 x 10
6
= 45.8 ppm/
°
C
70 (2.495)
μ
V
REF
=
= 45.8 ppm/
°
C
NOTE 2
The dynamic impedance Z
ka
is defined as:
D
V
KA
|Z
ka
| =
D
I
K
When the device is programmed with two external resistors, R1 and
R2, (refer to Figure 2) the total dynamic impedance of the circuit is
defined as:
REF
I
KA
V
Input
K
I
REF
V
KA
V
Input
off
I
KA
V
Input
K
I
REF
V
D
V
REF
= V
REF
Max -
V
REF
Min
D
T
A
= T2 - T1
R2
V
KA
= V
REF
1+ R1
REF
x R1
( )
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