Analog Devices ADRV9002 User Manual

Preliminary Technical Data UG-1828
Rev. PrC | Page 241 of 338
TRANSMITTER RF PORT IMPEDANCE MATCHING NETWORK
TX1± and TX2± Impedance Matching Network
For the TX path, the ADRV9001 evaluation board uses both the top and bottom layers of the PCB evaluation platform to accommodate
two balun footprints. The 0805 footprint accommodates the high frequency narrowband baluns while the backside accommodates the
larger AT224-1A case style transformer.
The ADRV9001 evaluation board provides two options in providing the DC common mode bias for the TX outputs. For transformers
that provide a DC feed pin, this can be used to bias the TX output. For transformers that do not provide a DC feed pin, the TX outputs
are biased to 1.8 V through pull up inductors. Only one bias option should be chosen, and provisions should be made to disable the
unused path.
The PCB traces of the evaluation board were included in the simulation when designing the impedance match. Figure 229 and Table 98
provides impedance matching networks specific to the ADRV9001 evaluation board. The component values apply to TX1± and TX2±.
Placement of C335 should be as close to dc feed pin of balun T302 as its purpose is to eliminate TX spectrum spurs and dampen the
transients. Ground terminal of C335 should be tied to a ground plane and the cap should be oriented in the same direction of ground
plane surrounding TX input trace so that the return current forms as small a loop as possible with the ground plane.
Figure 229. TX1 and TX2 Impedance Matching Network
Table 98. TX1± and TX2± Impedance Matching Network
Frequency Balun L/C 311
L309
L310
C309
C310
L/C/R 312
L/C/R 313
L339
C339
C346/34
7
R367/36
8 R361
C333
C334
C335
L/C/R
341
L/C/R
348 L/C 314
L/C/R
315 L/C 316
30 MHz – 3
GHz
MiniCircuits
TC-1-13M+
L311:
DNI
C311:
0.3 pF
(Murata
GJM03)
L309/310:
220 nH
(CoilCraft
LQW18AN)
C309/C310
: 10 nF
(Murata
GRM03)
L312/313:
1.2 nH
AVX Ind
L0201
Series
C312/313:
DNI
R312/313:
DNI
L339:
DNI
C339:
0.8 pF
(Murata
GJM03)
C346/34
7 :
330 pF
(Murata
GRM03)
R367,
R368:
DNI
R361: DNI
C333:
DNI
C334:
DNI
C335:
DNI
L341:
DNI
C341:
DNI
R341:
DNI
L348:
2.2 nH
AVX
Ind
(L0201
Series
C348:
DNI
R348:
DNI
L314:
DNI
C314:
1pF
(Murata
GJM03)
L315: 2.2
nH
AVX Ind
(L0201
Series)
C315:
DNI
R315:
DNI
L316:
DNI
C316:
DNI
3 GHz – 6
GHz
Johanson
4400
L311:
DNI
C311:
0.2 pF
(Murata
GJM03)
L309/310:
DNI
C309/C310
: DNI
L312/313:
0.68 nH
AVX Ind
(L0201
Series)
C312/313:
DNI
R312/313:
DNI
L339:
DNI
C339:
0.3 pF
(Murata
GJM03)
C346/34
7: DNI
R367/368
: 0 Ω
R361: 27
nH
Murata
Ind
(LQW18)
C333:
10uF
C334:
0.1uF
C335:
2.7pF
(Murata
GJM03)
L341:
0.33nH
AVX
Ind
(L0201
Series)
C341:
DNI
R341:
DNI
L348:
DNI
C348:
DNI
R348:
DNI
L314:
DNI
C314:
0.3 pF
(Murata
GJM03)
L315:
0.82 nH
AVX Ind
(L0201
Series)
C315:
DNI
R315:
DNI
L316:
DNI
C316:
DNI
AGND
VANA2_1P8
TX2_OUT–
TX2_OUT+
VANA2_1P8
VANA2_1P8
AGND
RF OUTPUT 2
J302
T312
TCM1-13M+
652
C335
0.1µF
C334
0.1µF
C333
10µF
0805 FOOTPRINT
BAL_OUT1
BAL_OUT2
NC_6GNDGND_DC_FEED_RFGND
T302
DNI
UNBAL_IN
RFO_2
1
3
4
RX2B_DC
BALUN LOCATED
ON TOP
OF THE BOARD
BALUN LOCATED
ON BOTTOM
OF THE BOARD
L312
DNI
C351
DNI
C309
DNI
R312
DNI
L313
DNI
C313
DNI
R313
DNI
NOTES
1. MATCHING COMPONENTS APPLY TO TX1± AND TX2±
R367
DNI
R368
DNI
R368
0Ω
DNI
AGND
C310
DNI
L339
DNI
L311
DNI
C339
DNI
C311
DNI
L309
DNI
L309
DNI
L348
DNI
C348
DNI
R348
DNI
L314
DNI
C314
DNI
L316
DNI
C316
DNI
L341
DNI
R341
DNI
C341
DNI
L315
DNI
R315
DNI
C315
DNI
6
4
1
TX2_BAL–
TX2_BAL+
3
2
SEC PRI
NC
C346
DNI
C347
DNI
IMPEDANCE CHARACTERISTICS:
Tx OUTPUTS = 50Ω DIFFERENTIAL,
BALUN = 50Ω SET TO 50Ω DIFF
24159-179

Analog Devices ADRV9002 Specifications

General

Brand	Analog Devices
Model	ADRV9002
Category	Transceiver
Language	English