ZTK6.8 thru ZTK33
Vishay Semiconductors
formerly General Semiconductor
Voltage Stabilizers
DO-204AH (DO-35 Glass)
Features
• Temperature-Compensated Stabilizing Circuits
• Monolithic linear integrated circuits with
extremely short thermal run-in time producing a con-
stant temperature-compensated voltage. They are par-
ticularly suitable for stabilizing the tuning
voltage in radio and TV tuners employing voltage-
variable capacitance diodes.
Mechanical Data
Dimensions are in inches
and (millimeters)
Case:
DO-35 Glass Case
Weight:
approx. 0.13 g
Packaging codes/options:
D7/10K per 13” reel (52mm tape), 20K/box
D8/10K per Ammo tape, (52mm tape), 20K/box
Maximum Ratings
Parameter
(T
A
= 25°C unless otherwise noted)
Symbol
Value
Unit
Operating Current (see Table “Characteristics”)
Junction temperature
Storage temperature range
T
J
T
S
150
– 20 to +150
°C
°C
Electrical and Thermal Characteristics
Parameter
Temperature Coefficient of the operating voltage
at I
Z
= 5 mA ±0.5 in the range of T
amb
= 20 to 60°C
Thermal Run-in-Time
Thermal resistance junction to ambient air
(T
A
= 25°C unless otherwise noted)
Symbol
Min.
–10
–
–
Typ.
–2
–20
(2)
–
Max.
+5
(1)
–
400
Unit
10
–5
/°C
s
°C/W
α
vz
tt
h
R
θJA
Type
ZTK6.8
ZTK9
ZTK11
ZTK18
ZTK22
ZTK27
ZTK33A
ZTK33B
ZTK33C
Operating Voltage
at I
Z
= 5mA
(3)
V
Z
(V)
6.4 ... 7.1
8 ... 10
10 ... 12
16 ... 20
20 ... 24
24 ... 30
30 ... 32
32 ... 34
34 ... 36
Dynamic resistance
at I
Z
= 5mA
r
zj
(W)
10 (<25)
10 (<25)
10 (<25)
11(<25)
11(<25)
12 (<25)
12 (<25)
12 (<25)
12 (<25)
Permissable operating
at T
amb
= 25∞C
(4)
I
Z
max. (mA)
36
27
1
13
1
8
7
7
7
(3) Tested with pulses t
p
= 5ms
(4) Valid provided that leads are kept at ambient
temperature at a distance of 8mm from case.
Notes:
(1) Valid provided that leads are kept at ambient temperature at a distance of 8 mm from case
(2) At the end of this time
∆V
Z
has reached 90% of its final value
∆V
Z max
.
∆V
Z max
= V
Z
(a) – V
Z
(0),
where V
Z
(0) = V
Z
in the instant of turn-on and V
Z
(a) = V
Z
at thermal equilibrium
Document Number 88426
02-May-02
www.vishay.com
1
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