TRIQUINT TGS2304-SCC

Product Data Sheet
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
1
Product Data Sheet
TGS2304-SCC
TYPICAL
INSERTION
LOSS
TYPICAL
ISOLATION
TYPICAL
INPUT POWER
P1dB
TriQuint Semiconductor Texas Phone: (972)994 8465
Fax: (972)994 8504 Web: www.triquint.com
2
Product Data Sheet
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
3
Product Data Sheet
TGS2304-SCC
TYPICAL INPUT
RETURN LOSS VS.
CONTROL BIAS
CURRENT
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
4
Product Data Sheet
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
5
Product Data Sheet
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, PIN……………………………………………………………………………2 W
Mounting temperature (30 sec.), TM………………………………………………………………………….320oC
Storage temperature range, TSTG…………………………………………………………………………….-65 to 175oC
Ratings over operating channel tem perature range, TCH (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 (TJ ) 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
6
Product Data Sheet
TGS2304-SCC
TYPICAL
S-PARAMETERS
(through path)
RF Input to RF output 3, 0
S 11
F re que nc y
S 21
S 12
S 22
Ins ert io n Lo s s
(GHz)
M AG
ANG(°)
M AG
ANG(°)
M AG
ANG(°)
M AG
ANG(°)
(dB )
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
17.5
18.0
18.5
19.0
19.5
20.0
0.03
0.03
0.04
0.04
0.05
0.05
0.06
0.07
0.08
0.10
0.12
0.14
0.15
0.15
0.15
0.15
0.13
0.12
0.11
0.11
0.12
0.13
0.14
0.14
0.13
0.11
0.09
0.06
0.10
0.15
0.18
0.21
0.23
0.24
0.24
0.25
0.27
0.31
0.34
0.39
-36
-63
90
-106
-117
-117
-114
-111
-112
-117
-126
-136
-146
-154
-163
-169
-171
-166
-162
-158
-161
-167
-175
176
165
158
160
-171
-133
-129
-131
-137
-145
-152
-159
-166
-165
-161
-154
-156
0.962
0.963
0.959
0.959
0.961
0.960
0.957
0.955
0.955
0.951
0.948
0.945
0.940
0.937
0.935
0.935
0.932
0.938
0.937
0.937
0.935
0.932
0.930
0.927
0.927
0.927
0.927
0.926
0.920
0.917
0.916
0.909
0.904
0.900
0.897
0.893
0.887
0.871
0.854
0.833
-6
-11
-17
-23
-28
-34
-40
-46
-51
-57
-63
-69
-75
-80
-86
-91
-97
-102
-108
-114
-120
-126
-132
-138
-144
-150
-156
-163
-169
-175
179
172
166
159
152
145
137
130
122
118
0.960
0.963
0.961
0.959
0.958
0.959
0.957
0.954
0.953
0.951
0.948
0.946
0.941
0.937
0.933
0.932
0.933
0.939
0.936
0.936
0.933
0.931
0.929
0.924
0.926
0.926
0.926
0.925
0.919
0.915
0.913
0.908
0.902
0.899
0.896
0.892
0.885
0.872
0.845
0.839
-6
-11
-17
-23
-28
-34
-40
-45
-51
-57
-63
-69
-74
-80
-86
-91
-97
-102
-108
-114
-120
-126
-132
-138
-144
-150
-156
-163
-169
-175
179
172
166
159
152
145
138
130
123
119
0.04
0.05
0.07
0.08
0.09
0.09
0.09
0.08
0.09
0.11
0.13
0.15
0.17
0.18
0.18
0.18
0.16
0.14
0.12
0.11
0.11
0.13
0.14
0.15
0.15
0.13
0.10
0.06
0.04
0.09
0.13
0.16
0.18
0.19
0.20
0.21
0.23
0.27
0.31
0.36
-45
-59
-65
-69
-74
-82
-94
-110
-129
-143
-152
-159
-164
-167
-171
-175
177
169
157
142
130
120
112
108
106
103
96
75
-4
-44
-57
-63
-68
-72
-77
-87
-104
-124
-143
-156
0.3
0.3
0.4
0.4
0.3
0.4
0.4
0.4
0.4
0.4
0.5
0.5
0.5
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.7
0.7
0.7
0.7
0.7
0.7
0.8
0.8
0.8
0.9
0.9
0.9
1.0
1.0
1.2
1.4
1.6
TA = 25OC, 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
7
Product Data Sheet
TGS2304-SCC
TYPICAL
S-PARAMETERS
(isolated path)
RF Input to RF output 3
S 11
F re que nc y
S 21
S 12
S 22
Is o la tio n
(GHz)
M AG
ANG(°)
M AG
ANG(°)
M AG
ANG(°)
M AG
ANG(°)
(dB )
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
17.5
18.0
18.5
19.0
19.5
20.0
0.06
0.06
0.05
0.04
0.06
0.02
0.08
0.07
0.05
0.08
0.08
0.07
0.12
0.13
0.05
0.11
0.04
0.06
0.08
0.09
0.10
0.14
0.12
0.10
0.13
0.09
0.09
0.09
0.18
0.22
0.07
0.22
0.08
0.28
0.08
0.24
0.40
0.16
0.51
0.43
15
-2
-22
-5
-52
-34
-57
-103
-95
-112
-131
-149
-140
173
-169
177
170
-153
-141
-164
-171
165
97
141
69
32
-42
-84
-78
-148
-79
-128
76
-97
-140
-90
-133
-156
-141
-164
0.0005
0.0011
0.0017
0.0023
0.0029
0.0037
0.0041
0.0046
0.0054
0.0058
0.0064
0.0070
0.0076
0.0082
0.0095
0.0092
0.0103
0.0109
0.0115
0.0120
0.0123
0.0123
0.0134
0.0132
0.0153
0.0167
0.0179
0.0178
0.0188
0.0159
0.0197
0.0188
0.0220
0.0229
0.0197
0.0257
0.0238
0.0232
0.0247
0.0201
-87
-113
-132
-151
-160
-168
-180
175
167
163
158
154
151
151
143
140
138
135
130
126
127
124
126
123
125
120
113
109
104
102
103
95
101
76
89
77
61
71
44
48
0.0005
0.0011
0.0017
0.0023
0.0029
0.0037
0.0041
0.0046
0.0054
0.0058
0.0064
0.0070
0.0076
0.0082
0.0095
0.0092
0.0103
0.0109
0.0115
0.0120
0.0123
0.0123
0.0134
0.0132
0.0153
0.0167
0.0179
0.0178
0.0188
0.0159
0.0197
0.0188
0.0220
0.0229
0.0197
0.0257
0.0238
0.0232
0.0247
0.0201
-75
-119
-129
-149
-162
-170
-180
175
168
161
157
155
150
150
142
141
138
135
130
126
128
124
126
122
125
121
113
109
102
102
104
95
102
76
89
77
62
72
46
48
0.90
0.90
0.88
0.87
0.87
0.86
0.87
0.87
0.88
0.88
0.88
0.89
0.88
0.88
0.88
0.88
0.87
0.87
0.87
0.87
0.87
0.87
0.87
0.87
0.87
0.88
0.87
0.86
0.86
0.85
0.86
0.85
0.85
0.85
0.85
0.86
0.86
0.85
0.86
0.83
177
173
169
166
163
158
153
148
144
141
138
136
133
129
126
123
119
114
111
107
102
96
90
86
84
83
82
78
73
67
62
56
52
48
46
43
39
31
23
18
66.3
59.2
55.2
52.8
50.8
48.6
47.7
46.7
45.4
44.7
43.9
43.1
42.4
41.7
40.4
40.7
39.7
39.3
38.8
38.4
38.2
38.2
37.5
37.6
36.3
35.6
34.9
35.0
34.5
36.0
34.1
34.5
33.2
32.8
34.1
31.8
32.5
32.7
32.2
33.9
TA = 25OC, 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
8
Product Data Sheet
TGS2304-SCC
TYPICAL
S-PARAMETERS
(through path)
RF Input to RF output 2, 1
S 11
F re que nc y
S 21
S 12
S 22
Ins ertio n Lo s s
(GHz)
M AG
ANG(°)
M AG
ANG(°)
M AG
ANG(°)
M AG
ANG(°)
(dB )
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
17.5
18.0
18.5
19.0
19.5
20.0
0.03
0.03
0.04
0.05
0.05
0.05
0.04
0.04
0.04
0.06
0.07
0.08
0.10
0.11
0.11
0.11
0.09
0.07
0.05
0.04
0.04
0.05
0.06
0.06
0.06
0.05
0.02
0.04
0.07
0.11
0.16
0.19
0.20
0.21
0.20
0.20
0.19
0.21
0.25
0.30
-26
-41
-51
-56
-62
-67
-76
-91
-107
-123
-133
-142
-150
-154
-155
-158
-164
-175
162
144
143
146
133
110
95
92
139
-143
-113
-93
-90
-94
-103
-108
-113
-122
-142
-167
-178
-174
0.962
0.962
0.962
0.962
0.960
0.960
0.960
0.957
0.958
0.954
0.952
0.948
0.949
0.946
0.941
0.940
0.940
0.941
0.940
0.939
0.939
0.940
0.936
0.935
0.933
0.933
0.934
0.933
0.928
0.924
0.912
0.908
0.908
0.907
0.905
0.906
0.909
0.896
0.891
0.871
-6
-12
-18
-24
-29
-35
-41
-48
-53
-59
-65
-71
-77
-83
-89
-95
-101
-106
-112
-118
-124
-130
-136
-143
-149
-155
-161
-167
-174
180
174
168
161
154
148
141
135
127
120
113
0.964
0.963
0.963
0.962
0.960
0.959
0.957
0.957
0.956
0.954
0.952
0.951
0.945
0.946
0.944
0.940
0.940
0.940
0.939
0.937
0.940
0.938
0.939
0.935
0.933
0.932
0.932
0.932
0.931
0.921
0.914
0.907
0.907
0.908
0.907
0.907
0.904
0.900
0.883
0.882
-6
-12
-18
-24
-30
-35
-41
-47
-53
-59
-65
-71
-77
-83
-89
-95
-101
-106
-112
-118
-124
-130
-137
-143
-149
-155
-161
-167
-174
180
174
168
161
155
148
141
134
127
120
114
0.03
0.03
0.03
0.03
0.04
0.04
0.05
0.06
0.07
0.08
0.09
0.11
0.12
0.13
0.13
0.13
0.12
0.11
0.11
0.10
0.10
0.09
0.10
0.11
0.11
0.10
0.05
0.01
0.04
0.09
0.14
0.17
0.18
0.18
0.18
0.17
0.17
0.19
0.22
0.26
-33
-49
-61
-72
-81
-86
-91
-99
-109
-123
-136
-147
-157
-166
-176
176
172
178
-176
-175
178
165
156
155
152
145
128
66
-84
-111
-123
-130
-129
-133
-138
-143
-133
-125
-130
-151
0.3
0.3
0.3
0.3
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.7
0.8
0.8
0.8
0.8
0.9
0.9
0.8
1.0
1.0
1.2
TA = 25OC, 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
9
Product Data Sheet
TGS2304-SCC
TYPICAL
S-PARAMETERS
(isolated path)
RF Input to RF output 2, 1
S 11
F re que nc y
S 21
S 12
S 22
Is o la tio n
(GHz)
M AG
ANG(°)
M AG
ANG(°)
M AG
ANG(°)
M AG
ANG(°)
(dB)
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
17.5
18.0
18.5
19.0
19.5
20.0
0.06
0.06
0.08
0.07
0.12
0.06
0.09
0.09
0.07
0.11
0.13
0.12
0.16
0.18
0.12
0.19
0.10
0.10
0.10
0.12
0.15
0.21
0.14
0.18
0.13
0.07
0.03
0.11
0.15
0.31
0.12
0.28
0.17
0.26
0.18
0.20
0.39
0.27
0.55
0.55
10
-35
-69
-80
-88
-102
-77
-106
-102
-117
-135
-150
-141
-172
-155
-169
-177
-156
-139
-148
-150
-170
151
172
122
115
-134
-145
-112
-152
-153
-141
139
-108
-178
-110
-143
173
-160
178
0.0003
0.0002
0.0001
0.0004
0.0007
0.0011
0.0017
0.0022
0.0029
0.0032
0.0036
0.0040
0.0048
0.0047
0.0059
0.0059
0.0061
0.0062
0.0072
0.0075
0.0073
0.0076
0.0066
0.0067
0.0059
0.0057
0.0061
0.0065
0.0066
0.0077
0.0070
0.0075
0.0086
0.0102
0.0073
0.0057
0.0050
0.0055
0.0065
0.0070
127
98
-70
147
156
163
155
145
138
130
124
120
115
108
109
93
91
90
86
77
70
59
47
51
44
44
43
38
35
28
20
22
14
-5
-25
-22
-20
-14
-23
-28
0.0003
0.0002
0.0001
0.0004
0.0007
0.0011
0.0017
0.0022
0.0029
0.0032
0.0036
0.0040
0.0048
0.0047
0.0059
0.0059
0.0061
0.0062
0.0072
0.0075
0.0073
0.0076
0.0066
0.0067
0.0059
0.0057
0.0061
0.0065
0.0066
0.0077
0.0070
0.0075
0.0086
0.0102
0.0073
0.0057
0.0050
0.0055
0.0065
0.0070
59
48
-112
159
161
161
149
140
139
130
123
120
113
110
108
94
91
90
85
76
70
61
48
53
44
44
43
39
34
27
20
22
13
-5
-24
-24
-18
-16
-27
-29
0.90
0.90
0.89
0.88
0.87
0.87
0.87
0.87
0.88
0.88
0.88
0.89
0.89
0.89
0.89
0.88
0.89
0.88
0.88
0.88
0.87
0.88
0.88
0.89
0.88
0.89
0.87
0.88
0.87
0.87
0.85
0.87
0.85
0.87
0.87
0.87
0.88
0.86
0.89
0.85
177
173
169
165
162
158
155
151
147
143
140
137
134
132
128
124
121
118
115
111
107
103
101
100
98
94
88
81
76
72
71
66
64
62
63
59
52
39
29
27
70.3
74.0
79.3
68.0
63.1
59.2
55.4
53.2
50.9
49.9
48.8
48.0
46.4
46.6
44.6
44.6
44.3
44.2
42.9
42.5
42.7
42.4
43.6
43.5
44.5
44.9
44.3
43.7
43.6
42.3
43.1
42.5
41.3
39.8
42.7
44.9
46.1
45.2
43.7
43.1
TA = 25OC, 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
10
Product Data Sheet
TGS2304-SCC
RF CHARACTERISTICS
IL
ISO
SWR(in)
SWR(out)
P1dB(in)
PARAMETER
Insertion loss
Isolation
Input standing–w ave ratio
Output standing–w ave ratio
Input pow er at 1–dB gain compression
TEST CONDITIONS
TYP
Midband
0.6
Midband
38
Midband
1.2:1
Through selected output arm, midband 1.2:1
23
TA = 25OC
EQUIVALENT
SCHEMATIC
RECOMMENDED TEST
CONFIGURATION
TriQuint Semiconductor Texas Phone: (972)994 8465
Fax: (972)994 8504 Web: www.triquint.com
11
Product Data Sheet
TGS2304-SCC
FUNCTION TABLE
LOW–LOS S P ATH
RF Input to
RF Input to
RF Input to
RF Input to
RF Output 0
RF Output 1
RF Output 2
RF Output 3
R F INP UT RF OUTP UT 0 RF OUTP UT 1 RF OUTP UT 2 R F OUTP UT 3
0
0
0
0
V
V
V
V
-10 mA
10 mA
10 mA
10 mA
10 mA
-10 mA
10 mA
10 mA
10 mA
10 mA
-10 mA
10 mA
10 mA
10 mA
10 mA
-10 mA
TEST ASSEMBLY
DIAGRAM
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
12
Product Data Sheet
TGS2304-SCC
MECHANICAL
DRAWING
TriQuint Semiconductor Texas Phone: (972)994 8465
Fax: (972)994 8504 Web: www.triquint.com
13
Product Data Sheet
TGS2304-SCC
Application Notes:
INTRODUCTION
CONNECTION
INSTRUCTIONS
Driver Circuit for 2300 Series GaAs PIN Diode Switches
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.
OPERATING
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.
TriQuint Semiconductor Texas Phone: (972)994 8465
Fax: (972)994 8504 Web: www.triquint.com
14
Product Data Sheet
TGS2304-SCC
DRIVER VOLTAGE AP P LIED AT R F
CONTROL LOGIC
TABLE
TGS2304–SCC
R F SWITC H AR M S
0
1
2
3
0
1
2
3
L
H
H
H
ON
OFF
OFF
OFF
H
L
H
H
OFF
ON
OFF
OFF
H
H
L
H
OFF
OFF
ON
OFF
H
H
H
L
OFF
OFF
OFF
ON
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
15
Product Data Sheet
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.
TriQuint Semiconductor Texas Phone: (972)994 8465
Fax: (972)994 8504 Web: www.triquint.com
16