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| 型号： | PJ431BCY |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.495 V, PSSO3 |
| 封装： | SOT-89, 3 PIN |
| 文件页数： | 7/12页 |
| 文件大小： | 508K |
| 代理商： | PJ431BCY |
PJ431/PJ431A/PJ431B
Programmable Precision References
4-12
2004/09 rev.C
1.
Tlow =-20 ℃, Thigh = +85℃
2.
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 :
T1
－
T2
10
C)
25
(at
V
＝
T1
－
T2
10
C)
25
(at
V
－
V
＝
C
ppm
V
6
REF
DEV
6
REF
MIN
MAX
REF
°
±
°
±
°
α
Where: T2-T1=full temperature change.
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=9.0mV, VREF=2.495mV, T2-T1=70℃,
slope is positive
C
50ppm/
＝
C
70
10
2495mV
9.0mV
＝
V
6
REF
°
α
3.
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:
≈
R2
R1
1＋
Z
ka
4.
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
R1
I
＋
R2
R1
＋
1
Ｖ
＝
V
ref
KA
FIGURE 3 -- TEST CIRCUIT FOR Ioff
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