zht431 Zetex Semiconductors plc., zht431 Datasheet - Page 3

• Manufacturer Part Number: zht431
• Description: Zht431 - Adjustable Precision Zener Shunt Regulator
• Manufacturer: Zetex Semiconductors plc.

Electrical characteristics test conditions (unless otherwise stated):T
Deviation of reference input voltage, V
input voltage over the full temperature range.
The average temperature coefficient of the reference input voltage, V
The dynamic output impedance, R
When the device is programmed with two externalresistors, R1
and R2, (fig 2) , the dynamic outputimpedance of the overall
circuit, R’, is defined as:
Issue 6 - July 2007
© Zetex Semiconductors plc 2007
V
R
R
Symbol Parameter
V
V
I
I
I
R
ΔV
---------------- -
REF
Zmin
Zoff
REF
Z
′
ΔV
REF
DEV
I
Z
REF
REF
=
=
Z
⎛
⎝
R
ppm
------------ -
Δ
--------- -
Δ
°C
Z
V
I
(
Z
Z
Reference voltage
Deviation of reference input
voltage over temperature
Ratio of the change in
reference voltage to the
change in cathode voltage
Reference input current
Deviation of reference input
current over temperature
Minimum cathode current
for regulation
Off-state current
Dynamic output impedance
1
⎞
⎠
+
=
R1
------ -
R2
----------------------------------------- -
V
V
)
DEV
REF
(
x 1000000
T1 T2
–
)
Z
2%
1% 2.475
, is defined as:
DEV
Min.
2.45
, is defined as the maximum variation of the reference
3
Value
-1.85
Typ.
2.50
2.50
0.04
0.12
-1.0
10
35
2.525
Max.
0.75
2.55
-2.7
-2.0
1.0
0.2
0.1
30
50
Units Conditions
mV/V V
mv/V V
mV
V
V
A
A
A
A
V
V
max
min
REF
T1
I
V
I
T
I
I
R1=10k, R2=O/C,
l
R1=10k, R2=O/C,
I
range (Fig.2)
V
V
V
I
L
L
Z
Z
L
L
C
is defined as:
amb
Z
Z
Z
Z
Z
Z
=10mA (Fig.1),
=10mA, V
=10mA (Fig.2)
=10mA T
=10mA (Fig.2)
=10mA (Fig.2)
=1mA to 100mA
=V
=V
=20V, V
=V
from V
from 10V to 20V
V
dev
=full range (Fig1)
REF
REF
REF
= V
Temperature
www.zetex.com
max
(Fig.1), f=0Hz,
(Fig.1)
amb
REF
REF
amb
ZHT431
Z
- V
=V
min
=0V(Fig.3)
to 10V
=25°C
=full
REF
T2