S849T/S849TR
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Rev. 3, 20-Jan-99
1 (8)
Document Number 85051
MOSMIC
for TVTuner Prestage with 12 V Supply
Voltage
MOSMIC - MOS Monolithic Integrated Circuit
Electrostatic sensitive device.
Observe precautions for handling.
Applications
Low noise gain controlled input stages in UHF-and
VHF- tuner with 12 V supply voltage.
G2
G1
RF in
AGC
S
D
V
DD
C block
RFC
RF out
94 9296
C block
C block
Features
D
Integrated gate protection diodes
D
Low noise figure
D
High gain
D
Biasing network on chip
D
Improved cross modulation at gain reduction
D
High AGC-range
D
SMD package
13 579
2
1
4
3
94 9279
S849T Marking: 849
Plastic case (SOT 143)
1 = Source, 2 = Drain, 3 = Gate 2, 4 = Gate 1
95 10831
2
1
4
3
94 9278
S849TR Marking: 49R
Plastic case (SOT 143R)
1 = Source, 2 = Drain, 3 = Gate 2, 4 = Gate 1
Absolute Maximum Ratings
T
amb
= 25
_
C, unless otherwise specified
Parameter
Test Conditions
Symbol
Value
Unit
Drain - source voltage
V
DS
16
V
Drain current
I
D
30
mA
Gate 1/Gate 2 - source peak current
I
G1/G2SM
10
mA
Gate 1/Gate 2 - source voltage
V
G1/G2SM
7.5
V
Total power dissipation
T
amb
60
C
P
tot
200
mW
Channel temperature
T
Ch
150
C
Storage temperature range
T
stg
55 to +150
C
Maximum Thermal Resistance
T
amb
= 25
_
C, unless otherwise specified
Parameter
Test Conditions
Symbol
Value
Unit
Channel ambient
on glass fibre printed board (25 x 20 x 1.5) mm
3
plated with 35
m
m Cu
R
thChA
450
K/W
S849T/S849TR
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Rev. 3, 20-Jan-99
2 (8)
Document Number 85051
Electrical DC Characteristics
T
amb
= 25
_
C, unless otherwise specified
Parameter
Test Conditions
Symbol
Min
Typ
Max Unit
Gate 1 - source
breakdown voltage
I
G1S
= 10 mA, V
G2S
= V
DS
= 0
V
(BR)G1SS
8
12
V
Gate 2 - source
breakdown voltage
I
G2S
= 10 mA, V
G1S
= V
DS
= 0
V
(BR)G2SS
8
12
V
Gate 1 - source
+V
G1S
= 6 V, V
G2S
= V
DS
= 0
+I
G1SS
60
m
A
leakage current
V
G1S
= 6 V, V
G2S
= V
DS
= 0
I
G1SS
120
m
A
Gate 2 - source
leakage current
V
G2S
= 6 V, V
G1S
= V
DS
= 0
I
G2SS
20
nA
Drain current
V
DS
= 12 V, V
G1S
= 0, V
G2S
= 6 V
I
DSS
50
500
m
A
Self-biased
operating current
V
DS
= 12 V, V
G1S
= nc, V
G2S
= 6 V
I
DSP
8
12
16
mA
Gate 2 - source
cut-off voltage
V
DS
= 12 V, V
G1S
= nc, I
D
= 200
m
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
Min
Typ
Max Unit
Forward transadmittance
y
21s
20
24
28
mS
Gate 1 input capacitance
C
issg1
2.1
2.5
pF
Feedback capacitance
C
rss
20
fF
Output capacitance
C
oss
0.9
pF
Power gain
G
S
= 2 mS, G
L
= 0.5 mS, f = 200 MHz
G
ps
26
dB
g
G
S
= 3,3 mS, G
L
= 1 mS, f = 800 MHz
G
ps
16.5
20
dB
AGC range
V
DS
= 12 V, V
G2S
= 1 to 6 V, f = 800 MHz
D
G
ps
40
dB
Noise figure
G
S
= 2 mS, G
L
= 0.5 mS, f = 200 MHz
F
1
dB
g
G
S
= 3,3 mS, G
L
= 1 mS, f = 800 MHz
F
1.3
dB
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
W
collector resistor.
S849T/S849TR
Vishay Telefunken
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Rev. 3, 20-Jan-99
3 (8)
Document Number 85051
Common Source SParameters
V
DS
= 12 V , V
G2S
= 6 V , Z
0
= 50
W,
T
amb
= 25
_
C, unless otherwise specified
S11
S21
S12
S22
f/MHz
LOG
MAG
ANG
LOG
MAG
ANG
LOG
MAG
ANG
LOG
MAG
ANG
dB
deg
dB
deg
dB
deg
dB
deg
50
0.01
3.9
7.46
175.0
61.64
87.7
0.17
1.7
100
0.04
7.6
7.37
169.3
55.58
85.2
0.20
3.3
150
0.11
11.5
7.30
163.4
52.05
82.0
0.22
5.0
200
0.16
15.1
7.21
157.8
49.78
79.5
0.25
6.6
250
0.28
19.1
7.09
151.8
48.15
76.4
0.26
8.4
300
0.39
22.4
6.98
146.8
46.79
75.0
0.31
9.8
350
0.51
26.0
6.79
141.2
45.92
72.6
0.34
11.3
400
0.65
29.4
6.66
136.0
45.15
70.9
0.38
12.8
450
0.79
32.7
6.47
131.0
44.66
69.5
0.44
14.3
500
0.95
35.8
6.29
125.8
44.28
67.8
0.48
15.9
550
1.09
39.0
6.13
121.0
44.13
67.3
0.53
17.4
600
1.26
42.2
5.91
116.0
44.04
68.0
0.59
18.8
650
1.41
45.1
5.76
111.8
43.84
68.6
0.63
20.2
700
1.56
48.3
5.55
106.9
43.97
69.2
0.65
21.6
750
1.71
50.9
5.40
102.6
44.18
70.4
0.72
23.1
800
1.89
53.6
5.22
98.0
44.54
73.2
0.76
24.4
850
2.02
56.7
5.08
93.8
44.81
77.0
0.80
25.9
900
2.15
59.5
4.89
89.4
45.03
83.4
0.85
27.6
950
2.28
62.3
4.75
85.2
44.87
90.8
0.90
29.0
1000
2.45
65.1
4.55
80.9
44.59
95.7
0.96
30.2
1050
2.59
67.8
4.38
76.2
44.59
100.2
1.07
31.6
1100
2.75
70.5
4.20
72.2
44.54
108.4
1.11
33.0
1150
2.81
73.3
4.14
67.9
44.05
116.7
1.13
34.7
1200
2.96
75.7
4.02
64.3
43.33
125.5
1.15
36.2
1250
3.07
78.7
3.90
60.1
42.41
133.5
1.18
37.6
1300
3.18
81.4
3.73
55.6
41.13
139.3
1.26
39.1
S849T/S849TR
Vishay Telefunken
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FaxBack +1-408-970-5600
Rev. 3, 20-Jan-99
4 (8)
Document Number 85051
Typical Characteristics (T
amb
= 25
_
C unless otherwise specified)
0
25
50
75
100
0
50
100
150
200
250
P
T
otal Power Dissipation ( mW
)
tot
T
amb
Ambient Temperature (
C )
150
95 10759
125
Figure 1. Total Power Dissipation vs.
Ambient Temperature
0
2
4
6
8
0
4
8
12
16
20
I Drain Current ( mA
)
D
V
DS
Drain Source Voltage ( V )
12
95 10760
10
V
G2S
=6V
2V
1V
3V
5V
4V
Figure 2. Drain Current vs. Drain Source Voltage
0
1
2
3
4
0
4
8
12
16
20
I Drain Current ( mA
)
D
V
G2S
Gate 2 Source Voltage ( V )
6
95 10761
5
V
DS
=12V
Figure 3. Drain Current vs. Gate 2 Source Voltage
0
10
20
30
40
95 10764
0
1
2
3
4
V
G2S
Gate 2 Source Voltage ( V )
6
5
V
DS
=12V
f=800MHz
y Forward
T
ransadmittance ( mS )
21s
Figure 4. Forward Transadmittance vs.
Gate 2 Source Voltage
C Gate 1 Input Capacitance ( pF )
issg1
95 10762
0
1
2
3
4
0
1
2
3
4
V
G2S
Gate 2 Source Voltage ( V )
6
5
V
DS
=12V
f=200MHz
Figure 5. Gate 1 Input Capacitance vs.
Gate 2 Source Voltage
0
0.5
1.0
1.5
2.0
6
8
10
12
14
V
DS
Drain Source Voltage ( V )
15967
C Output Capacitance ( pF )
oss
V
G2S
=6V
f=200MHz
Figure 6. Output Capacitance vs. Drain Source Voltage
S849T/S849TR
Vishay Telefunken
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Rev. 3, 20-Jan-99
5 (8)
Document Number 85051
60
40
20
0
20
S
T
ransducer
Gain
(
dB
)
2
95 10763
0
1
2
3
4
V
G2S
Gate 2 Source Voltage ( V )
6
5
21
V
DS
=12V
f=800MHz
Figure 7. Transducer Gain vs. Gate 2 Source Voltage
CM Cross Modulation ( dB )
95 11138
0
20
40
60
80
2
3
4
5
6
V
G2S
Gate 2 Source Voltage ( V )
V
DS
=12V
f=800MHz
Figure 8. Cross Modulation vs. Gate 2 Source Voltage
S849T/S849TR
Vishay Telefunken
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FaxBack +1-408-970-5600
Rev. 3, 20-Jan-99
6 (8)
Document Number 85051
V
DS
= 8 V, I
D
= 10 mA, V
G2S
= 4 V , Z
0
= 50
W
S
11
12 948
j0.2
j0.5
j
j2
j5
0
j0.2
j0.5
j
j2
j5
1
0.2
0.5
1
2
5
50
300
800
1300MHz
Figure 9. Input reflection coefficient
S
21
0
90
90
1.0
2.0
150
120
60
30
120
60
30
12 950
50
1300MHz
300
550
800
1050
Figure 10. Forward transmission coefficient
S
12
0
90
180
90
0.008
0.016
150
120
60
30
120
60
30
12 949
50
1300MHz
300
550
1050
Figure 11. Reverse transmission coefficient
S
22
12 951
j0.2
j0.5
j
j2
j5
0
j0.2
j0.5
j
j2
j5
1
0.2
0.5
1
2
5
50
1300MHz
550
1050
Figure 12. Output reflection coefficient
S849T/S849TR
Vishay Telefunken
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FaxBack +1-408-970-5600
Rev. 3, 20-Jan-99
7 (8)
Document Number 85051
Dimensions of S849T in mm
96 12240
Dimensions of S849TR in mm
96 12239
S849T/S849TR
Vishay Telefunken
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FaxBack +1-408-970-5600
Rev. 3, 20-Jan-99
8 (8)
Document Number 85051
Ozone Depleting Substances Policy Statement
It is the policy of Vishay Semiconductor GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating
systems with respect to their impact on the health and safety of our employees and the public, as well as their
impact on the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances ( ODSs ).
The Montreal Protocol ( 1987 ) and its London Amendments ( 1990 ) intend to severely restrict the use of ODSs and
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban
on these substances.
Vishay Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the use of
ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency ( EPA ) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively.
Vishay Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting
substances and do not contain such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer application
by the customer. Should the buyer use Vishay-Telefunken products for any unintended or unauthorized application, the
buyer shall indemnify Vishay-Telefunken against all claims, costs, damages, and expenses, arising out of, directly or
indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use.
Vishay Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423
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