TriQuint Semiconductor Texas Phone: (972)994 8465 Fax: (972)994 8504 Web: www.triquint.com
Product Data Sheet
1
DC- 20 GHz SP4T PIN Switch TGS2304-SCC
Key Features and Performance
DC to 20 GHz Frequency Range
0.6 dB Typical Midband Insertion Loss
38 dB Typical Midband Isolation
Typical Input / Output SWR 1.2:1,
Midband
23 dB Typical Input Power at 1 dB Gain
Compression
2.540 x 3.556 x 0.1016 mm (0.100 x
0.140 x 0.004 in.)
Description
The TriQuint TGS2304-SCC is a GaAs monolithic PIN-diode single-pole, four-throw
switch, in chip form, that operates from DC to 20 GHz. Each arm consists of one
series and two shunt PIN diodes. At a bias current of 10 mA per RF output arm,
typical midband insertion loss is 0.6 dB; midband return loss is approximately 20
dB. Typical isolation at 10 mA bias is 40 dB. Insertion loss and isolation can be
adjusted by varying the switch arm bias currents.
Using a GaAs vertical PIN diode process, TriQuint has produced switches with high
power handling capability, low on-state resistance, and low off-state capacitance.
The higher cutoff frequency of the PIN diode element makes this switch ideal for
broadband electronic components and communication systems wherein the MMIC
construction offers reduced size, cost, and assembly time. Bond pad and backside
metallization is gold plated for compatibility with eutectic alloy attach methods as
well as thermocompression and thermosonic wire-bonding processes.
TriQuint Semiconductor Texas Phone: (972)994 8465 Fax: (972)994 8504 Web: www.triquint.com
Product Data Sheet
2
TGS2304-SCC
TYPICAL
INPUT POWER
P
1dB
TYPICAL
INSERTION
LOSS
TYPICAL
ISOLATION
TriQuint Semiconductor Texas Phone: (972)994 8465 Fax: (972)994 8504 Web: www.triquint.com
Product Data Sheet
3
TGS2304-SCC
TYPICAL
RETURN LOSS
TYPICAL
INSERTION
LOSS VS. CONTROL
BIAS CURRENT
TYPICAL ISOLATION
VS. CONTROL
BIAS CURRENT
TriQuint Semiconductor Texas Phone: (972)994 8465 Fax: (972)994 8504 Web: www.triquint.com
Product Data Sheet
4
TYPICAL INPUT
RETURN LOSS VS.
CONTROL BIAS
CURRENT
TGS2304-SCC
TYPICAL OUTPUT
RETURN LOSS VS.
CONTROL BIAS
CURRENT
TYPICAL INSERTION
LOSS VS. CONTROL
BIAS CURRENT
TriQuint Semiconductor Texas Phone: (972)994 8465 Fax: (972)994 8504 Web: www.triquint.com
Product Data Sheet
5
TGS2304-SCC
TYPICAL
ISOLATION VS.
CONTROL BIAS
CURRENT
TYPICAL
INPUT RETURN
LOSS VS. CONTROL
BIAS CURRENT
TYPICAL
INPUT RETURN
LOSS VS. CONTROL
BIAS CURRENT
TriQuint Semiconductor Texas Phone: (972)994 8465 Fax: (972)994 8504 Web: www.triquint.com
Product Data Sheet
6
TGS2304-SCC
ABSOLUTE
MAXIMUM
RATINGS
Forw ard Voltage, V
F
....................................................................................................... 2.5 V
Forw ard Voltage, V
R
....................................................................................................... 30 V
Bias current.................................................................................................................. 50 mA
Input continuous w ave pow er, P
IN
.......................................................................................2 W
Mounting temperature (30 sec.), T
M
.....................................................................................320
o
C
Storage temperature range, T
STG
........................................................................................-65 to 175
o
C
Ratings over operating channel temperature range, T
CH
(unless otherw ise noted).
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond
those indicated under "recommended operating conditions" is not implied. Exposure to absolute maximum rated
conditions for extended periods may affect device reliability.
DC blocks are not provided at RF ports.
The operating junction temperature (T
J
) w ill directly affect the device MTTF. For maximum life, it is recommended
that junction temperature be maintained at the low est possible level.
TriQuint Semiconductor Texas Phone: (972)994 8465 Fax: (972)994 8504 Web: www.triquint.com
Product Data Sheet
7
TGS2304-SCC
TYPICAL
S-PARAMETERS
(through path)
RF Input to RF output 3, 0
F re quency S
11
S
21
S
12
S
22
Ins ertio n Lo s s
(GHz)
MAG
ANG()
MAG
ANG()
MAG
ANG()
MAG
ANG()
(dB )
0.5
0.03
-36
0.962
-6
0.960
-6
0.04
-45
0.3
1.0
0.03
-63
0.963
-11
0.963
-11
0.05
-59
0.3
1.5
0.04
90
0.959
-17
0.961
-17
0.07
-65
0.4
2.0
0.04
-106
0.959
-23
0.959
-23
0.08
-69
0.4
2.5
0.05
-117
0.961
-28
0.958
-28
0.09
-74
0.3
3.0
0.05
-117
0.960
-34
0.959
-34
0.09
-82
0.4
3.5
0.06
-114
0.957
-40
0.957
-40
0.09
-94
0.4
4.0
0.07
-111
0.955
-46
0.954
-45
0.08
-110
0.4
4.5
0.08
-112
0.955
-51
0.953
-51
0.09
-129
0.4
5.0
0.10
-117
0.951
-57
0.951
-57
0.11
-143
0.4
5.5
0.12
-126
0.948
-63
0.948
-63
0.13
-152
0.5
6.0
0.14
-136
0.945
-69
0.946
-69
0.15
-159
0.5
6.5
0.15
-146
0.940
-75
0.941
-74
0.17
-164
0.5
7.0
0.15
-154
0.937
-80
0.937
-80
0.18
-167
0.6
7.5
0.15
-163
0.935
-86
0.933
-86
0.18
-171
0.6
8.0
0.15
-169
0.935
-91
0.932
-91
0.18
-175
0.6
8.5
0.13
-171
0.932
-97
0.933
-97
0.16
177
0.6
9.0
0.12
-166
0.938
-102
0.939
-102
0.14
169
0.6
9.5
0.11
-162
0.937
-108
0.936
-108
0.12
157
0.6
10.0
0.11
-158
0.937
-114
0.936
-114
0.11
142
0.6
10.5
0.12
-161
0.935
-120
0.933
-120
0.11
130
0.6
11.0
0.13
-167
0.932
-126
0.931
-126
0.13
120
0.6
11.5
0.14
-175
0.930
-132
0.929
-132
0.14
112
0.6
12.0
0.14
176
0.927
-138
0.924
-138
0.15
108
0.7
12.5
0.13
165
0.927
-144
0.926
-144
0.15
106
0.7
13.0
0.11
158
0.927
-150
0.926
-150
0.13
103
0.7
13.5
0.09
160
0.927
-156
0.926
-156
0.10
96
0.7
14.0
0.06
-171
0.926
-163
0.925
-163
0.06
75
0.7
14.5
0.10
-133
0.920
-169
0.919
-169
0.04
-4
0.7
15.0
0.15
-129
0.917
-175
0.915
-175
0.09
-44
0.8
15.5
0.18
-131
0.916
179
0.913
179
0.13
-57
0.8
16.0
0.21
-137
0.909
172
0.908
172
0.16
-63
0.8
16.5
0.23
-145
0.904
166
0.902
166
0.18
-68
0.9
17.0
0.24
-152
0.900
159
0.899
159
0.19
-72
0.9
17.5
0.24
-159
0.897
152
0.896
152
0.20
-77
0.9
18.0
0.25
-166
0.893
145
0.892
145
0.21
-87
1.0
18.5
0.27
-165
0.887
137
0.885
138
0.23
-104
1.0
19.0
0.31
-161
0.871
130
0.872
130
0.27
-124
1.2
19.5
0.34
-154
0.854
122
0.845
123
0.31
-143
1.4
20.0
0.39
-156
0.833
118
0.839
119
0.36
-156
1.6
T
A
= 25
O
C, I = 10 mA
The reference planes for S-parameter data include bond wires as specified in the test assembly diagram.
The S-parameters are also available on floppy disk and the world wide web.
TriQuint Semiconductor Texas Phone: (972)994 8465 Fax: (972)994 8504 Web: www.triquint.com
Product Data Sheet
8
TYPICAL
S-PARAMETERS
(isolated path)
RF Input to RF output 3
TGS2304-SCC
F re quency S
11
S
21
S
12
S
22
Is o latio n
(GHz)
MAG
ANG()
M AG
ANG()
MAG
ANG()
MAG
ANG()
(dB )
0.5
0.06
15
0.0005
-87
0.0005
-75
0.90
177
66.3
1.0
0.06
-2
0.0011
-113
0.0011
-119
0.90
173
59.2
1.5
0.05
-22
0.0017
-132
0.0017
-129
0.88
169
55.2
2.0
0.04
-5
0.0023
-151
0.0023
-149
0.87
166
52.8
2.5
0.06
-52
0.0029
-160
0.0029
-162
0.87
163
50.8
3.0
0.02
-34
0.0037
-168
0.0037
-170
0.86
158
48.6
3.5
0.08
-57
0.0041
-180
0.0041
-180
0.87
153
47.7
4.0
0.07
-103
0.0046
175
0.0046
175
0.87
148
46.7
4.5
0.05
-95
0.0054
167
0.0054
168
0.88
144
45.4
5.0
0.08
-112
0.0058
163
0.0058
161
0.88
141
44.7
5.5
0.08
-131
0.0064
158
0.0064
157
0.88
138
43.9
6.0
0.07
-149
0.0070
154
0.0070
155
0.89
136
43.1
6.5
0.12
-140
0.0076
151
0.0076
150
0.88
133
42.4
7.0
0.13
173
0.0082
151
0.0082
150
0.88
129
41.7
7.5
0.05
-169
0.0095
143
0.0095
142
0.88
126
40.4
8.0
0.11
177
0.0092
140
0.0092
141
0.88
123
40.7
8.5
0.04
170
0.0103
138
0.0103
138
0.87
119
39.7
9.0
0.06
-153
0.0109
135
0.0109
135
0.87
114
39.3
9.5
0.08
-141
0.0115
130
0.0115
130
0.87
111
38.8
10.0
0.09
-164
0.0120
126
0.0120
126
0.87
107
38.4
10.5
0.10
-171
0.0123
127
0.0123
128
0.87
102
38.2
11.0
0.14
165
0.0123
124
0.0123
124
0.87
96
38.2
11.5
0.12
97
0.0134
126
0.0134
126
0.87
90
37.5
12.0
0.10
141
0.0132
123
0.0132
122
0.87
86
37.6
12.5
0.13
69
0.0153
125
0.0153
125
0.87
84
36.3
13.0
0.09
32
0.0167
120
0.0167
121
0.88
83
35.6
13.5
0.09
-42
0.0179
113
0.0179
113
0.87
82
34.9
14.0
0.09
-84
0.0178
109
0.0178
109
0.86
78
35.0
14.5
0.18
-78
0.0188
104
0.0188
102
0.86
73
34.5
15.0
0.22
-148
0.0159
102
0.0159
102
0.85
67
36.0
15.5
0.07
-79
0.0197
103
0.0197
104
0.86
62
34.1
16.0
0.22
-128
0.0188
95
0.0188
95
0.85
56
34.5
16.5
0.08
76
0.0220
101
0.0220
102
0.85
52
33.2
17.0
0.28
-97
0.0229
76
0.0229
76
0.85
48
32.8
17.5
0.08
-140
0.0197
89
0.0197
89
0.85
46
34.1
18.0
0.24
-90
0.0257
77
0.0257
77
0.86
43
31.8
18.5
0.40
-133
0.0238
61
0.0238
62
0.86
39
32.5
19.0
0.16
-156
0.0232
71
0.0232
72
0.85
31
32.7
19.5
0.51
-141
0.0247
44
0.0247
46
0.86
23
32.2
20.0
0.43
-164
0.0201
48
0.0201
48
0.83
18
33.9
T
A
= 25
O
C, I = 10 mA
The reference planes for S-parameter data include bond wires as specified in the test assembly diagram.
The S-parameters are also available on floppy disk and the world wide web.
TriQuint Semiconductor Texas Phone: (972)994 8465 Fax: (972)994 8504 Web: www.triquint.com
Product Data Sheet
9
TGS2304-SCC
TYPICAL
S-PARAMETERS
(through path)
RF Input to RF output 2, 1
T
A
= 25
O
C, I = 10 mA
The reference planes for S-parameter data include bond wires as specified in the test assembly diagram.
The S-parameters are also available on floppy disk and the world wide web.
F re quency S
11
S
21
S
12
S
22
Ins ertio n Lo s s
(GHz)
MAG
ANG()
MAG
ANG()
M AG
ANG()
M AG
ANG()
(dB )
0.5
0.03
-26
0.962
-6
0.964
-6
0.03
-33
0.3
1.0
0.03
-41
0.962
-12
0.963
-12
0.03
-49
0.3
1.5
0.04
-51
0.962
-18
0.963
-18
0.03
-61
0.3
2.0
0.05
-56
0.962
-24
0.962
-24
0.03
-72
0.3
2.5
0.05
-62
0.960
-29
0.960
-30
0.04
-81
0.4
3.0
0.05
-67
0.960
-35
0.959
-35
0.04
-86
0.4
3.5
0.04
-76
0.960
-41
0.957
-41
0.05
-91
0.4
4.0
0.04
-91
0.957
-48
0.957
-47
0.06
-99
0.4
4.5
0.04
-107
0.958
-53
0.956
-53
0.07
-109
0.4
5.0
0.06
-123
0.954
-59
0.954
-59
0.08
-123
0.4
5.5
0.07
-133
0.952
-65
0.952
-65
0.09
-136
0.4
6.0
0.08
-142
0.948
-71
0.951
-71
0.11
-147
0.5
6.5
0.10
-150
0.949
-77
0.945
-77
0.12
-157
0.5
7.0
0.11
-154
0.946
-83
0.946
-83
0.13
-166
0.5
7.5
0.11
-155
0.941
-89
0.944
-89
0.13
-176
0.5
8.0
0.11
-158
0.940
-95
0.940
-95
0.13
176
0.5
8.5
0.09
-164
0.940
-101
0.940
-101
0.12
172
0.5
9.0
0.07
-175
0.941
-106
0.940
-106
0.11
178
0.5
9.5
0.05
162
0.940
-112
0.939
-112
0.11
-176
0.5
10.0
0.04
144
0.939
-118
0.937
-118
0.10
-175
0.5
10.5
0.04
143
0.939
-124
0.940
-124
0.10
178
0.5
11.0
0.05
146
0.940
-130
0.938
-130
0.09
165
0.5
11.5
0.06
133
0.936
-136
0.939
-137
0.10
156
0.6
12.0
0.06
110
0.935
-143
0.935
-143
0.11
155
0.6
12.5
0.06
95
0.933
-149
0.933
-149
0.11
152
0.6
13.0
0.05
92
0.933
-155
0.932
-155
0.10
145
0.6
13.5
0.02
139
0.934
-161
0.932
-161
0.05
128
0.6
14.0
0.04
-143
0.933
-167
0.932
-167
0.01
66
0.6
14.5
0.07
-113
0.928
-174
0.931
-174
0.04
-84
0.6
15.0
0.11
-93
0.924
180
0.921
180
0.09
-111
0.7
15.5
0.16
-90
0.912
174
0.914
174
0.14
-123
0.8
16.0
0.19
-94
0.908
168
0.907
168
0.17
-130
0.8
16.5
0.20
-103
0.908
161
0.907
161
0.18
-129
0.8
17.0
0.21
-108
0.907
154
0.908
155
0.18
-133
0.8
17.5
0.20
-113
0.905
148
0.907
148
0.18
-138
0.9
18.0
0.20
-122
0.906
141
0.907
141
0.17
-143
0.9
18.5
0.19
-142
0.909
135
0.904
134
0.17
-133
0.8
19.0
0.21
-167
0.896
127
0.900
127
0.19
-125
1.0
19.5
0.25
-178
0.891
120
0.883
120
0.22
-130
1.0
20.0
0.30
-174
0.871
113
0.882
114
0.26
-151
1.2
TriQuint Semiconductor Texas Phone: (972)994 8465 Fax: (972)994 8504 Web: www.triquint.com
Product Data Sheet
10
TGS2304-SCC
TYPICAL
S-PARAMETERS
(isolated path)
RF Input to RF output 2, 1
T
A
= 25
O
C, I = 10 mA
The reference planes for S-parameter data include bond wires as specified in the test assembly diagram.
The S-parameters are also available on floppy disk and the world wide web.
F re quency S
11
S
21
S
12
S
22
Is o latio n
(GHz)
MAG
ANG()
MAG
ANG()
M AG
ANG()
MAG
ANG()
(dB)
0.5
0.06
10
0.0003
127
0.0003
59
0.90
177
70.3
1.0
0.06
-35
0.0002
98
0.0002
48
0.90
173
74.0
1.5
0.08
-69
0.0001
-70
0.0001
-112
0.89
169
79.3
2.0
0.07
-80
0.0004
147
0.0004
159
0.88
165
68.0
2.5
0.12
-88
0.0007
156
0.0007
161
0.87
162
63.1
3.0
0.06
-102
0.0011
163
0.0011
161
0.87
158
59.2
3.5
0.09
-77
0.0017
155
0.0017
149
0.87
155
55.4
4.0
0.09
-106
0.0022
145
0.0022
140
0.87
151
53.2
4.5
0.07
-102
0.0029
138
0.0029
139
0.88
147
50.9
5.0
0.11
-117
0.0032
130
0.0032
130
0.88
143
49.9
5.5
0.13
-135
0.0036
124
0.0036
123
0.88
140
48.8
6.0
0.12
-150
0.0040
120
0.0040
120
0.89
137
48.0
6.5
0.16
-141
0.0048
115
0.0048
113
0.89
134
46.4
7.0
0.18
-172
0.0047
108
0.0047
110
0.89
132
46.6
7.5
0.12
-155
0.0059
109
0.0059
108
0.89
128
44.6
8.0
0.19
-169
0.0059
93
0.0059
94
0.88
124
44.6
8.5
0.10
-177
0.0061
91
0.0061
91
0.89
121
44.3
9.0
0.10
-156
0.0062
90
0.0062
90
0.88
118
44.2
9.5
0.10
-139
0.0072
86
0.0072
85
0.88
115
42.9
10.0
0.12
-148
0.0075
77
0.0075
76
0.88
111
42.5
10.5
0.15
-150
0.0073
70
0.0073
70
0.87
107
42.7
11.0
0.21
-170
0.0076
59
0.0076
61
0.88
103
42.4
11.5
0.14
151
0.0066
47
0.0066
48
0.88
101
43.6
12.0
0.18
172
0.0067
51
0.0067
53
0.89
100
43.5
12.5
0.13
122
0.0059
44
0.0059
44
0.88
98
44.5
13.0
0.07
115
0.0057
44
0.0057
44
0.89
94
44.9
13.5
0.03
-134
0.0061
43
0.0061
43
0.87
88
44.3
14.0
0.11
-145
0.0065
38
0.0065
39
0.88
81
43.7
14.5
0.15
-112
0.0066
35
0.0066
34
0.87
76
43.6
15.0
0.31
-152
0.0077
28
0.0077
27
0.87
72
42.3
15.5
0.12
-153
0.0070
20
0.0070
20
0.85
71
43.1
16.0
0.28
-141
0.0075
22
0.0075
22
0.87
66
42.5
16.5
0.17
139
0.0086
14
0.0086
13
0.85
64
41.3
17.0
0.26
-108
0.0102
-5
0.0102
-5
0.87
62
39.8
17.5
0.18
-178
0.0073
-25
0.0073
-24
0.87
63
42.7
18.0
0.20
-110
0.0057
-22
0.0057
-24
0.87
59
44.9
18.5
0.39
-143
0.0050
-20
0.0050
-18
0.88
52
46.1
19.0
0.27
173
0.0055
-14
0.0055
-16
0.86
39
45.2
19.5
0.55
-160
0.0065
-23
0.0065
-27
0.89
29
43.7
20.0
0.55
178
0.0070
-28
0.0070
-29
0.85
27
43.1
TriQuint Semiconductor Texas Phone: (972)994 8465 Fax: (972)994 8504 Web: www.triquint.com
Product Data Sheet
11
TGS2304-SCC
RF CHARACTERISTICS
EQUIVALENT
SCHEMATIC
T
A
= 25
O
C
RECOMMENDED TEST
CONFIGURATION
PARAMETER
TEST CONDITIONS
TYP
IL
Insertion loss
Midband
0.6
ISO
Isolation
Midband
38
SWR(in)
Input standingw ave ratio
Midband
1.2:1
SWR(out) Output standingw ave ratio
Through selected output arm, midband 1.2:1
P
1dB(in)
Input pow er at 1dB gain compression
23
TriQuint Semiconductor Texas Phone: (972)994 8465 Fax: (972)994 8504 Web: www.triquint.com
Product Data Sheet
12
TGS2304-SCC
FUNCTION TABLE
TEST ASSEMBLY
DIAGRAM
LOWLOSS P ATH
R F INP UT RF OUTP UT 0 RF OUTP UT 1 RF OUTP UT 2 R F OUTP UT 3
RF Input to RF Output 0
0 V
-10 mA
10 mA
10 mA
10 mA
RF Input to RF Output 1
0 V
10 mA
-10 mA
10 mA
10 mA
RF Input to RF Output 2
0 V
10 mA
10 mA
-10 mA
10 mA
RF Input to RF Output 3
0 V
10 mA
10 mA
10 mA
-10 mA
RF connections: bond using three 1.0-mil diameter, 20 to 25-mil-length gold bond wires at both RF Input and RF
Output for optimum RF performance.
Close placement of external components is essential for resonant-free performance.
Refer to TriQuint's Gallium Arsenide Products Designer's Information, MMIC Assembly Procedures, on our
web site.
TriQuint Semiconductor Texas Phone: (972)994 8465 Fax: (972)994 8504 Web: www.triquint.com
Product Data Sheet
13
TGS2304-SCC
MECHANICAL
DRAWING
TriQuint Semiconductor Texas Phone: (972)994 8465 Fax: (972)994 8504 Web: www.triquint.com
Product Data Sheet
14
TGS2304-SCC
Driver Circuit for 2300 Series GaAs PIN Diode Switches
Application Notes:
INTRODUCTION
This section describes how a single 5 V power supply and a 74F24ON line driver
are used in a driver circuit for the TGS2304 PIN-diode switch. The PIN switch
must be mounted on a silicon MOS capacitor (MOSCAP or equivalent) of
approximately 1000 pF (see Mounting Diagram, page 15). Eight separate drivers
are provided in a single `F240 DIP (see Driver Circuit, page 15). In addition, the
`F240 can be set to provide an inverted or a non-inverted output. The inverted is
preferred in this application because it allows the 1G pin to be tied to ground
instead of 5 V, eliminating the use of an extra power supply. The 74BCT240,
74BCT240N, and 74S240N also work with this driver circuit.
The Interface Schematic (see page 16) shows a voltage divider that can be used
to provide approximately 2 V to the RF Input (common) port of the TGS2304-SCC.
This bias voltage should be connected to the RF Input through a bias tee or some
equivalent RF choke/DC block network.
Connect this same bias voltage to the top plate of the MOSCAP through a ~3-nH
coil bonded to MMIC ground pad as shown in the Interface Schematic and RF
Input Bias Coil Assembly (both on page 16). Care should be taken not to bond the
inductor close to the via, as this could result in device damage. The ground pad is
connected to the backside of the TGS2304-SCC by plated-through vias. This sets
the top plate of the MOSCAP to 2 V, effectively providing a 2 V reference for the
RF input port and the cathodes of the two shunt diodes in each arm. The bottom
plate of the MOSCAP is true DC ground.
Connect the four RF Output ports of the TGS2304-SCC to the `F240 outputs
through a bias tee or some equivalent RF choke/DC block, as shown in the
Interface Schematic on page 16.
CONNECTION
INSTRUCTIONS
For proper switch operation, only one arm should be turned on at any one time as
shown in the Control Logic Table on page 15. The following description of how the
driver circuit controls one arm of the TGS2304-SCC applies to all arms.
To turn an arm on: A TTL high at the `F240 input results in approximately 0.3 V at
the corresponding output. This is applied to the appropriate RF Output port. Since
the RF Input port of the TGS2304-SCC is at 2 V, the arm is turned on. The series
diode in that arm is forward biased by approximately 1.7 V, and the two shunt
diodes are reverse biased (off) by 1.7 V. Under these conditions, the bias current
is typically 12 mA and midband insertion loss is typically 0.9 dB.
To turn an arm off: A TTL low at the `F240 input results in approximately 3.1 V at
the corresponding output. This is applied to the appropriate RF Output port. Since
the RF Input port of the TGS2304-SCC is at 2 V, the arm is turned off. The series
diode in that arm is reverse biased by approximately 1.1 V, and the shunt diodes
in that arm are forward biased (on) by 1.1 V. Under these conditions, the bias
current is typically 9 mA and the midband isolation is typically 40 dB.
OPERATING
INSTRUCTIONS
TriQuint Semiconductor Texas Phone: (972)994 8465 Fax: (972)994 8504 Web: www.triquint.com
Product Data Sheet
15
TGS2304-SCC
DRIVER VOLTAGE AP P LIED AT R F
R F SWITC H AR M S
0
1
2
3
0
1
2
3
L
H
H
H
ON
OFF
OFF
OFF
TGS2304SCC
H
L
H
H
OFF
ON
OFF
OFF
H
H
L
H
OFF
OFF
ON
OFF
H
H
H
L
OFF
OFF
OFF
ON
CONTROL LOGIC
TABLE
L = low (typically 0.3 V), H = high (typically 3.1 V)
MOUNTING DIAGRAM
DRIVER CIRCUIT
TriQuint Semiconductor Texas Phone: (972)994 8465 Fax: (972)994 8504 Web: www.triquint.com
Product Data Sheet
16
TGS2304-SCC
INTERFACE
SCHEMATIC
RF INPUT BIAS
COIL ASSEMBLY
GaAs MMIC devices are susceptible to damage from Electrostatic Discharge. Proper precautions should be observed
during handling, assembly and test.
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