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参数资料
| 型号： | PJ1431CX |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO3 |
| 封装： | SOT-23, 3 PIN |
| 文件页数： | 3/9页 |
| 文件大小： | 631K |
| 代理商： | PJ1431CX |
PJ1431
Programmable Precision References
3-9
2002.ver.A
Tlow = -20
℃, T
high = +85
℃
The deviation parameter
△
Vref
is defined as the
differences between the maximum and minimum values
obtained over the full operating ambient temperature range
the applies.
The average temperature coefficient of the reference input
voltage,
α Vref , is defined as :
)
C
25
@
V
(
T
10
V
10
T
C
25
@
V
)
V
(
C
ppm
V
ref
A
6
ref
6
A
ref
°
×
=
×
°
=
°
α
αVref can be positive of negative depending on whether
Vref Min of Vref Max occurs at the lower ambient temperature.
(Refer to Figure 6)
Example: △Vref = 8.0 mV and slope is positive,
Vref @ 25
℃ = 2.5V, △T
A = 85℃
C
/
ppm
8
.
45
)
5
.
2
(
70
10
008
.
0
V
6
ref
°
=
×
=
α
The dynamic impedance Zka is defined as:
K
KA
ka
I
V
Z
=
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:
+
≈
2
1
ka
R
1
Z
This test is not applicable to surface mount (D suffix) devices.
FIGURE 1 -- TEST CIRCUIT FOR VKA = vref
FIGURE 2 -- TEST CIRCUIT FOR VKA > Vref
1
ref
2
1
ref
kA
R
I
R
1
V
+
+
=
FIGURE 3 -- TEST CIRCUIT FOR Ioff
3
4
2
1
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