External Active Loop Filter Using Opa341 - Texas Instruments CDCM7005 User Manual

5.1.2

External Active Loop Filter Using OPA341

Figure 5−2. CDCM7005 With a External Active Loop Filter Using OPA341
SPI
V
CC
130 Ω
R
82 Ω
VC(X)O
491.52 MHz
PECL_OUT_B
PECL_OUT
CDCM7005
PRI_REF
SEC_REF
CP_OUT
CTRL_LE
STATUS_REF
CTRL_DATA
STATUS_VC(X)O
CTRL_CLK PLL_LOCK
V
CC
130 Ω
YnA
VC(X)O_IN
VC(X)O_IN
YnB
150 Ω
R
82 Ω
Low-Pass Filter
V_CTRL
C3
100 nF
Vcc
4.7 kΩ
R5
10 kΩ
R1
OPA341
180 Ω
R6 C1
10 kΩ 100 nF
C1
100 nF
10 nF
10 nF
R
R
150 Ω
Application Circuit Diagram
Application Circuit Diagram
R3
10 kΩ
C2
R2
10 µF
Vcc
InN
Out
InP
5-3