
S849T/S849TR
Vishay Telefunken
www.vishay.de
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2 (8)
Rev. 3, 20-Jan-99
Document Number 85051
Electrical DC Characteristics
T
amb
= 25 C, unless otherwise specified
Parameter
Gate 1 - source
breakdown voltage
Gate 2 - source
breakdown voltage
Gate 1 - source
leakage current
Gate 2 - source
leakage current
Drain current
Self-biased
operating current
Gate 2 - source
cut-off voltage
Test Conditions
Symbol
±
V
(BR)G1SS
Min
8
Typ
Max Unit
12
±
I
G1S
= 10 mA, V
G2S
= V
DS
= 0
V
±
I
G2S
= 10 mA, V
G1S
= V
DS
= 0
±
V
(BR)G2SS
8
12
V
+V
G1S
= 6 V, V
G2S
= V
DS
= 0
–V
G1S
= 6 V, V
G2S
= V
DS
= 0
±
V
G2S
= 6 V, V
G1S
= V
DS
= 0
+I
G1SS
–I
G1SS
±
I
G2SS
60
120
20
A
A
nA
V
DS
= 12 V, V
G1S
= 0, V
G2S
= 6 V
V
DS
= 12 V, V
G1S
= nc, V
G2S
= 6 V
I
DSS
I
DSP
50
8
500
16
A
12
mA
V
DS
= 12 V, V
G1S
= nc, I
D
= 200 A
V
G2S(OFF)
1.0
V
Electrical AC Characteristics
V
DS
= 12 V, V
G2S
= 6 V, f = 1 MHz , T
amb
= 25 C, unless otherwise specified
Parameter
Test Conditions
Symbol
y
21s
C
issg1
C
rss
C
oss
G
ps
G
ps
G
ps
F
F
Min
20
Typ
24
2.1
20
0.9
26
20
Max Unit
28
2.5
Forward transadmittance
Gate 1 input capacitance
Feedback capacitance
Output capacitance
Power gain
mS
pF
fF
pF
dB
dB
dB
dB
dB
G
S
= 2 mS, G
L
= 0.5 mS, f = 200 MHz
G
S
= 3,3 mS, G
L
= 1 mS, f = 800 MHz
V
DS
= 12 V, V
G2S
= 1 to 6 V, f = 800 MHz
G
S
= 2 mS, G
L
= 0.5 mS, f = 200 MHz
G
S
= 3,3 mS, G
L
= 1 mS, f = 800 MHz
16.5
40
AGC range
Noise figure
1
1.3
Caution for Gate 1 switch-off mode:
No external DC-voltage on Gate 1 in active mode!
Switch-off at Gate 1 with V
G1S
< 0.7 V is feasible.
Using open collector switching transistor (inside of PLL), insert 10 k collector resistor.