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6-11
Circuit diagrams
50
Z[OHM]
(N.C)
TL2
2.C401,C402,C443,C444 are High Q capacitors
L307: 6.8nH for PCS
L502: 10nH for PCS
1.L325,L332 are High Q inductor (Coilcraft 0805HQ series)
TL3
1.3
TL6
TL5
LC FILTER : C(470),L(340,334)
TL1
TL8
Will be connected
U310
TL4
AN301
in PCS Model
Note:
TL2
TL3
L341
TL6
C476(379)
1.19
65
0.5
2.6
50
TL9
TL5
D302
STH-N270
R397
50
1.5
TL10
3.9
50
TL8
Q301
50
(1608)
TL4
DUMMY PAD
0.3
50
3.5
0.25
L[mm]
TL7
GND:135
65
1.12
65
Transmission
OSC303
F313
N270_RF
50
TL1
1UF
REV5.7
TL7
TL10
TL9
12
11
RFOUT
RFOUT
10
VCCB
14
VCC1
15
VCC1
16
GND
GND
3
9
GND
17
GND
4
RFIN
RFOUT
U305
2F0
13
BGND
8
1
GND
2
C309
R336
6.2K
10PF
100NF
C388
100NF
C315
2.4
100NF
C370
6.8nH
L313
R341
100NF
D302
C437
2.7NF
C346
C462
56PF
L302
220nH
AMPSOUT
4
1
G1
G2
3
5
G3
IN
2
6
PCSOUT
15
VCC2
16
7
VMODE
VPD1
6
VPD2
8
F305
2
5
GND1
17
GND
4
RFIN
10
RFOUT
1
VCC2
VCC1
3
14
VCC
VCC2
U309
2F0
13
9
BGND
GND2
C347
NC
R301
470
2PF
C390
RFOUT
6
VCC
33PF
C329
U307
GC
3
2
GND
GND 5
4
RFIN
1
2.2NF
C476
G3
G4
6
IN
2
5
OUT
R314
27ohm
F303
1
G1
G2
3
4
68PF
C307
1NF
3PF
C312
C340
C371
8PF
L323
6.8nH
820
C400
1NF
G
1
G
3
4
G
G
6
2
IN
5
OUT
R302
F310
10nH
L315
27ohm
R340
C331
100NF
C323
4.7PF
C440
5PF
6.2K
R395
100NF
C473
27ohm
R393
100NF
C465
C409
100NF
U310
D1
6
3
D2
2
G1
5
G2
S1
1
4
S2
C358
15PF
C320
NC
R315
C411
1NF
10
R364
0
3
OUT
NC
L320
F311
1
GND1
GND2
4
2
IN
100PF
C453
C375
2.2NF
10NF
C445
C354
15PF
R381
15PF
C325
100
51
R342
4.7K
R349
L327
82nH
R304
2.4K
C452
10NF
100PF
C425
C384
10NF
VCC
6.8nH
L340
GC
3
2
GND
GND 5
4
RFIN
1
RFOUT
6
U308
C463
56PF
R385
0
C324
NC
100PF
C327
10K
R337
R319
27ohm
R338
0
R326
4.7K
R320
4.7uH
L338
27ohm
R322
100NF
470
5
3
4
1
2
C336
L331
4.7nH
U306
R345
5.1K
R397
39K
10NF
C363
1K
R334
VCC
VT
3
11K
R389
5
G
G
6
7
G
G
8
1
RFOUT
4
SW
2
R383
10
OSC303
R323
1.5K
3
ISO
OUT
4
C306
1NF
F313
COUP
6
G1
2
5
G2
IN
1
C420
10NF
R382
100K
1NF
C403
10NF
C461
C394
100PF
680PF
1NF
C427
C475
4.7NF
C318
C330
390PF
C410
100PF
R330
2PF
27ohm
100K
C406
L324
8.2nH
R351
120
R388
C474
1NF
C467
0.5PF
100NF
C332
C439
5.6pF
C433
4.7NF
7PF
C305
6.3V
2
3
1
C364
10UF
Q301
5PF
C387
C366
15PF
C339
100PF
100NF
C450
C301
C428
10UF
100PF
R332
6.3V
3
2
1
10
D301
100PF
C395
C436
10PF
R328
27ohm
2K
R387
2.7NF
C377
L307
51
2.2PF
C333
2PF
C392
R358
18K
4.7PF
C361
L334
6.8nH
100PF
C458
100NF
C322
27ohm
R325
5.6nH
R310
560
L321
10
L332
12nH
C414
4.7PF
R344
100PF
C352
15PF
C438
C413
1NF
C393
100PF
C456
C365
100PF
15PF
16nH
C310
100NF
L325
1NF
C412
C343
100NF
R305
560
L336
10nH
C469
1NF
R366
1K
1
G1 G2
3
4
G3 G4
6
IN
5
2
OUT
C355
F302
R369
100PF
10
R373
2.2K
1.5PF
C316
100PF
R377
1K
C396
L311
8.2nH
L310
330uH
C460
5PF
8PF
C308
C319
1.8PF
C399
100PF
560
R391
R379
10
L322
1nH
10NF
C383
L335
2.7nH
100NF
C448
L328
NC
2
GND
GND
4
IN
3
OUT
1
C417
100PF
C466
U302
100PF
NC
C337
F307
3
GND1
GND2
4
1
IN
2
OUT
R390
R348
15K
5.6K
100PF
C335
10NF
C435
10PF
C314
100
R354
L329
15nH
100NF
C429
27ohm
R318
C464
1.5PF
L312
4.7nH
C378
NC
6.3V
10UF
C360
C362
10PF
C404
100PF
7
8
RFIN1
6
RFIN2
1
RFOUT1
RFOUT2
3
U301
4
EN1
EN2
5
GND
2
GND
R368
C369
100NF
33K
R327
150K
C419
100NF
NC
C443
270
R371
15
R346
R384
10
10PF
C459
4.7K
R343
R313
1K
5.6NF
C374
C373
27PF
2.2NF
C353
C376
33NF
NC
R392
C389
8PF
L304
2.7nH
C367
100NF
OUT1
1
3
OUT2
VC1
6
VC2
4
0
R365
U303
2
GND
5
IN
C431
100PF
C418
R378
6.2K
1K
10NF
27K
R357
R362
5PF
C401
RX
3
R312
470
28
29
G26
6
G3
G4
78
G5
G6
91
0
G7
11
G8
21
22
G19
G2
5
G20
23
G21
24
G22
25
26
G23
27
G24
G25
13
14
G11
G12
15
16
G13
17
G14
18
G15
G16
19
20
G17
G18
F306
ANT
2
4
G1
G10
L339
2.2uH
R339
1K
L306
15uH
C405
100NF
4.7PF
C444
C454
NC
3.9nH
L308
NC
C349
C357
100NF
3PF
C457
C447
L314
8.2nH
1PF
100PF
C321
270
10PF
C451
100NF
R316
C326
10K
R324
C311
100NF
1PF
C345
10UF
10V
C402
12PF
C449
C338
10NF
R350
10
R386
NC
R331
1nH
L333
L318
NC
82nH
10K
150
R370
R321
C424
10NF
C415
100PF
51
L502
L303
150nH
NC
C472
NC
C351
C442
8.2NF
100NF
C359
6
COUP
GND1
2
GND2
5
1
IN
3
OUT
4
TER
5.6nH
L317
F308
10NF
C432
C381
10NF
R308
0
3
G
G
4
6
G
IN
2
OUT
5
F309
1
G
GND2
IN
2
OUT
3
C302
100NF
F312
GND1
1
4
NC
C471
R333
3.3K
C455
2PF
C446
NC
R380
L326
12nH
10
27ohm
R303
15PF
C350
C385
100PF
G1
2
4
G2
G3
5
6
G4
1
IN
OUT
3
R367
0
F301
OSC302
2
GND
3
OUT
VC
1
VCC
4
10
R306
C416
2PF
C342
L301
22nH
100NF
C441
100PF
C348
100NF
10PF
C397
4.7NF
C317
C434
C344
100PF
AN301
-
NC
R396
R335
51
27ohm
R394
1NF
C341
10NF
C313
C356
220nF
100K
R307
10
R361
C407
8.2PF
10
R347
IN
5
OUT
10PF
C328
F304
1
G G
3 4
G G
6
2
C468
1UF
100PF
C398
8.2PF
C334
56PF
C304
1NF
C372
C426
NC
71
70
TX_QB
VCC
30
C380
10UF
6.3V
7
TCXO
TXGND
61
TXIF_GND
73
TXIF_VCC
67
TXVCC
60
TX_I
69
68
TX_IB
72
TX_I/Q_REF
TX_Q
12
11
RXIB
27
RXIF_GND1
RXIF_GND2
14
RXIF_VCC1
26
13
RXIF_VCC2
RXQ
10
9
RXQB
77
74
PLL2_IN
PLL2_VCC
75
78
PON_LD
80
PON_RX
PON_TX
79
QUAD
18
19
RSSI
RXI
62
PCS_IF_FLITER_2
43
PCS_IN
49
PCS_LO_AMP_IN
55
PLL1FLSW
PLL1GND
56
51
PLL1VCC
53
PLL1_CP
76
PLL2_CP
PLL2_GND
35
MIX2INB
37
MIX2OUT
MIX2VCC
36
MIXOUTB
40
MOSGND
4
MOS_VCC
6
57
PCSOUT
64
PCS_IF_FIL
TER_1
50
39
MIX1GND
MIX1GND
46
MIX1VCC
42
MIX1_INB
44
41
MIX1_OUT
MIX2GND
38
MIX2IN
34
33
GND
IOSGND
8
5
LD
23
LIM1OUT
25
LIM1/AGCIN
21
LIM2IN
LIMOUT
20
47
LOAMP_GND
LO_AMP_VCC
1
EN
15
FEEDBACK
31
FIL
TER1-A
FIL
TER1-B
32
FIL
TER2-A
28
29
FIL
TER2-B
FM_AUDIO
16
66
GCA_CONT
65
CELL_IF_FIL
TER_2
63
CELL_LO_AMP_IN
48
CLK
2
CP1_GND
54
CP1_VCC
52
3
DATA
DRV_GND
58
17
AGC
BYP
ASS
22
BYP
ASS
24
45
CELIN
59
CELLOUT
CELL_IF_FIL
TER_1
100PF
C303
U304
100NF
C430
R360
100PF
C368
10
R363
L337
5.6nH
2.2K
R329
27ohm
15
R372
R309
270
NC
L341
100PF
C386
6.8PF
C408
C421
100PF
L305
150nH
0
R374
R359
56K
R375
470K
82
R376
R356
10
L330
3.3nH
VCTCXO_IN
V_IF_VCO
V_RF2
MOD_FET
RX_BA
T
V_RF1
LOCK_DET
PON_LD
VBAT
RX_Q
RX_QN
TX_I
TX_IN
TXDA_REF
TX_Q
TX_QN
TX_PWR
MOD_FET
V_RF3
VBAT
V_RF1
PLL_CLK
PLL_DATA
PLL_STRB1
RX_BAT
ALC_EN
RX_I
RX_IN
VRX
VRX
V_RF1
DEMOD
AFC_OUT
V_VCTCXO
TX_RFBAND
PA_CNT
V_RF2
V_DRV_PCS
V_RF3
RF_BAND
V_PA_BIAS_CELL
TX_BAT
ANALOG_DIG
V_LNA_CELL
V_LNA_PCS
V_DRV_CELL
V_RF1
V_DET
V_IF_VCO
MOD
V_DRV_CELL
V_DRV_PCS
V_RF1
AGC_OUT
RSSI
A_IF_IN
VRX
5. STH-N275 RF Circuit Diagram
