Figure 8-57. Nuf6750A Frequency Generation Unit (Synthesizer) Circuit – 1 Of 2 - Motorola APX 5000 Service Manual

Schematics, Boards Overlays, and Parts Lists: Transceiver (RF) Boards: 700–800 MHz
DC_LIN_1_5V
IN
DC_LIN_1_875V_D
IN
DC_LIN_2_775V
IN
DC_LIN_5V
IN
DC_LIN_2_775V
L720
2.2UH
C715
.1UF
D722
C716 IMN10
4 3
.1UF
A1 K1
5 2
A2 K2
6 1
A3 K3
C717
.1UF
C718
D723
.1UF
IMN10
4 3
A1 K1
5 2
A2 K2
6 1
A3 K3
C719
.1UF
DC_LIN_1_875V_D
R721
10K
DIG_CTRL_RSTB
IN
RF_PRESCALAR
IN
DC_LIN_2_775V DC_LIN_1_875V_D DC_LIN_2_775V
L733 L735
2.2UH 2.2UH
L727
C726 2.2UH
.1UF
C730 C734 C737
.1UF .1UF .1UF
C724 C725
10UF .1UF
DIG_DATA_AUX_SPI_MISO
SDM_REF_
VCC
D3
AGC_REF
A6
AGC_FLAG
K6
AUX_DAC
A5
RFSTEPA_GPO6
NC
C3
NC AGC_DAC
B5
DC_CAL_GPO5
NC
B2
BP_I
NC
C1
NC RXI
C2
RXIX
NC
B1
BP_IX
NC
A10
NC SDM_VAG
E1
BP_Q
NC
D1
RXQ
NC
D2
NC RXQX
E2
BP_QX
NC
F5
SCAN_IN
NC
B6
NC RX_EN_OUT
J7
ICAP
NC
K7
NC QCAP
J10
NC CLK_OUT
J11
TCLK
NC
L6
NC NTXQ
L7
NC TXQ
K8
NTXI
NC
L8
NC TXI
F8
NC INCR_DECR
G11
PHCLK
NC
A3
NC FBQ
A4
NC FBI
DC_LIN_2_775V DC_LIN_2_775V_16_8_MHZ_IN
L728
390NH
C731
.1UF
Y701
1XTV16800VDA
R729 C736
16.8MHZ
22K .01UF
1 VCONT 3
OUTPUT
5
NC
NC1
6
NC2 NC
7
NC3 NC
8
C732 NC
NC4
39PF
DC_LIN_2_775V
L738
2.2UH
U702
15H28
SCAN_EN
R706
D9
SPI_DR
0
D8
CEX
D10
SPI_DW
C11
SPI_CLK
F9
TXFS
F10
TXCLK
F11
TXD
F7
DMCS
D11
RXD NC
E9
RXCLK NC
E8
RXFS NC
D7
RXACQ
J2
ESC_IN NC
L3
ESC_CP NC
K1
ESCD2_OUT NC
K2
ESCD2_OUTX
NC
H2
ESC_INX NC
L9
HP_MOD_OUT
G2
MN_ADAPT_CP
R755
H1 C749 .1UF
39K
M_PRSCX
G1
M_PRSC
RF_PRESCALAR
G3
MN_CP
C744
10UF
C742
.1UF
L741
DC_LIN_2_775V_16_8_MHZ_IN
2.2UH
R702
0
R745 C750
22K .1UF
C739
10PF
1 U746
C752
BFQ67W
L753
.01UF
2.2UH
R743
47K
R751 C754
270 56PF
Figure 8-57. NUF6750A Frequency Generation Unit (Synthesizer) Circuit – 1 of 2
DC_LIN_2_775V
DC_LIN_1_5V
DIG_CTRL_LOCK
DIG_DATA_SPI_MISO
DIG_CTRL_SPI_TRIDENT_PE
DIG_DATA_SPI_MOSI
DIG_TX_SSI_FS
DIG_TX_SSI_CLK
DIG_DATA_TX_SSI
DIG_CTRL_SSI_TRIGGER
RF_HP_MOD_OUT
ANA_ADAPT_CHARGE_PUMP
ANA_CHARGE_PUMP
DC_SUPER_FILTER_5V
DIG_CTRL_R78H
C756 C757
10UF .1UF
DC_LIN_2_775V DIG_CTRL_FEBS
DIG_CTRL_T78H
C758
.047UF
DIG_CTRL_TR
DIG_CTRL_TR
R707
0
U703
DIG_DATA_AUX_SPI_MISO
MAX7301ATL
DIG_CTRL_TXH1
V_POS
32 40
SCLK DOUT
34 30
CS P4
33 28
DIN P5
26
P6
NC
36 24
ISET P7
1
P8
29 3
NC P31
P9
27 5
P30 P10
25 7
P29 P11 NC
23 2
NC P28
P12 DIG_CTRL_VR
22 4
P27 P13
21 6
R754 5.6K RF BRD ID
P26 P14
DIG_CTRL_78T
19 8
P25
P15 NC
RF BRD ID R753 5.6K 18 9
P24 P16
17 10
P23 P17
RF BRD ID 5.6K R752 16 12
P22
P18 NC DIG_CTRL_7T8R
15 13
NC P21 P19 NC
14
P20
DIG_CTRL_8T7R
11
NC1 NC
20
NC2 NC
31
NC3 NC
DIG_CTRL_RX7H
DIG_CTRL_RX8H
DIG_CTRL_ATTH
DIG_CTRL_I_LIMIT
DIG_CTRL_RMTH
CLK_16_8_MHZ
8-89
OUT
OUT
OUT
OUT
IN
IN
DIG_SPI_CLK
IN
OUT
OUT
IN
IN
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
DIG_CTRL_D
OUT
DIG_CTRL_F
OUT
DIG_CTRL_A
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
DIG_CTRL_G
OUT
OUT