th7122 Melexis Company, th7122 Datasheet - Page 39

• Manufacturer Part Number: th7122
• Description: Transceiver - 27 To 930mhz, Fsk/fm/ask, Multi-channel Lqfp32
• Manufacturer: Melexis Company

9
9.1
9.2
Low Gain Mode
Note:
High Gain Mode
Note:
39010 07122
Rev. 008
CRX0
CTX0
CTX1
CTX2
CTX4
Part
LRX2
LTX0
LTX1
Frequency
Frequency
CB2
170 MHz
315 MHz
433 MHz
868 MHz
915 MHz
170 MHz
315 MHz
433 MHz
868 MHz
915 MHz
27 MHZ
27 MHZ
40 MHz
80 MHz
40 MHz
80 MHz
TX/RX Combining Network
Board Component List (Fig. 19)
Typical LNA S-Parameters in Receive Mode
Size
0603
0603
0603
0603
0603
0603
0603
0603
0603
input and output of the LNA are connected to 50 Ω ports without matching elements
input and output of the LNA are connected to 50 Ω ports without matching elements
Value @
Re[S
Re[S
0.9137
0.9137
0.9116
0.9005
0.8702
0.8278
0.6035
0.5729
0.8418
0.8422
0.8387
0.8196
0.7657
0.6994
0.3924
0.3620
100 pF
330 pF
82 nH
15 nH
33 nH
MHz
10 pF
10 pF
10 pF
12 pF
315
11
11
]
]
Value @
433.92
-0.0194
-0,0302
-0.0625
-0.1310
-0.2510
-0,5771
-0.0194
-0.0340
-0.0747
-0.1563
-0.2997
-0.3853
-0.5397
-0.5409
100 pF
330 pF
Im[S
Im[S
-03347
-05964
6.8 pF
6.8 pF
4.7 pF
56 nH
15 nH
33 nH
MHz
10 pF
11
11
]
]
Value @
868.3
6.38E-005
6.28E-005
8.45E-005
2.26E-004
4.86E-004
8.33E-004
1.79E-003
4.43E-003
1.40E-004
1.51E-004
1.87E-004
3.61E-004
5.85E-004
9.07E-004
7.90E-004
4.18E-004
100 pF
330 pF
5.6 pF
3.9 pF
2.2 pF
3.9 pF
MHz
10 pF
15 nH
10 nH
Re[S
Re[S
12
12
]
]
Value @
100 pF
330 pF
3.9 nH
4.7 pF
3.9 pF
1.8 pF
Page 39 of 44
15 nH
10 nH
MHz
10 pF
915
2.27E-004
3.41E-004
6.94E-004
1.47E-003
2.54-E003
3.32E-003
4.50E-003
4.43E-003
2.64E-004
3.70E-004
7.07E-004
1.47E-003
2.43E-003
3.11E-003
4.15E-003
4.20E-003
Im[S
Im[S
12
12
]
]
"
"
Fig. 19: Combining network schematic
50 Ω
RF output
RF input
No TX/RX switch required
Direct connection to λ/4 antenna possible
Re[S
-0.4167
-0.4085
-0.3970
-0.3703
-0.3500
-0.2958
-0.0639
-0.0388
Re[S
-4.0770
-4.0750
-4.0400
-3.8190
-3.5870
-3.0640
-0.7692
-0.5246
FSK/FM/ASK Transceiver
CTX2
21
21
]
]
LTX1
CTX1
Im[S
Im[S
0.0365
0.0445
0.0672
0.1281
0.1921
0.2550
0.3517
0.3515
0.1658
0.2628
0.5498
1.2100
1.8370
2.4650
3.3460
3.3190
21
21
]
]
LTX0
CB2
LRX2
Re[S
Re[S
0.9986
0.9983
0.9974
0.9945
0.9851
0.9734
0.8085
0.8872
0.9994
0.9992
0.9984
0.9952
0.9806
0.9664
0.8844
0.8738
CTX0
27 to 930MHz
CRX0
TH7122
CTX4
22
22
VCC
]
]
25
26
Data Sheet
-0.0140
-0.0204
-0.0400
-0.0846
-0.1560
-0.2146
-0.4242
-0.4463
-0.0141
-0.0208
-0.0415
-0.0882
-0.1607
-0.2192
-0.4150
-0.4344
Im[S
Im[S
OUT_PA
IN_LNA
June/07
22
22
]
]