參數(shù)資料
型號： AD9517-2A/PCBZ
廠商： Analog Devices Inc
文件頁數(shù)： 24/80頁
文件大?。?/td> 0K
描述： BOARD EVALUATION FOR AD9517-2A
設(shè)計資源： AD9517 Eval Brd Schematics
AD9517 Gerber Files
AD9517-2 BOM
標準包裝： 1
主要目的： 計時，時鐘發(fā)生器
嵌入式： 否
已用 IC / 零件： AD9517-2A
主要屬性： 2 輸入，12 輸出，2.2GHz VCO
次要屬性： CMOS，LVPECL 和 LVDS 兼容
已供物品： 板
AD9517-2
Data Sheet
Rev. E | Page 30 of 80
PROGRAMMABLE
N DELAY
REFIN (REF1)
REFIN (REF2)
CLK
REF1
REF2
AD9517-2
STATUS
R
DIVIDER
VCO STATUS
PROGRAMMABLE
R DELAY
REFERENCE
SWITCHOVER
REF_ SEL
CPRSET VCP
VS
GND
RSET
DISTRIBUTION
REFERENCE
REFMON
CP
STATUS
LD
P, P + 1
PRESCALER
A/B
COUNTERS
N DIVIDER
BYPASS
LF
LOW DROPOUT
REGULATOR (LDO)
VCO
PHASE
FREQUENCY
DETECTOR
LOCK
DETECT
CHARGE
PUMP
PL
L
RE
F
E
RE
NC
E
HOLD
OUT0
OUT1
OUT0
OUT1
LVPECL
DIVIDE BY
1 TO 32
OUT2
OUT3
OUT2
OUT3
LVPECL
DIVIDE BY
1 TO 32
DIVIDE BY
1 TO 32
LVDS/CMOS
DIVIDE BY
1 TO 32
DIVIDE BY
1 TO 32
LVDS/CMOS
DIVIDE BY
1 TO 32
0
1
DIVIDE BY
2, 3, 4, 5, OR 6
PD
SYNC
RESET
SCLK
SDIO
SDO
CS
DIGITAL
LOGIC
SERIAL
CONTROL
PORT
OUT4 (OUT4A)
OUT4 (OUT4B)
OUT5 (OUT5A)
OUT5 (OUT5B)
OUT6 (OUT6A)
OUT6 (OUT6B)
OUT7 (OUT7A)
OUT7 (OUT7B)
T
06
42
6-
03
0
Figure 44. Internal VCO and Clock Distribution
Internal VCO and Clock Distribution
When using the internal VCO and PLL, the VCO divider must
be employed to ensure that the frequency presented to the channel
dividers does not exceed their specified maximum frequency of
1600 MHz (see Table 3). The internal PLL uses an external loop
filter to set the loop bandwidth. The external loop filter is also
crucial to the loop stability.
When using the internal VCO, it is necessary to calibrate the
VCO (Register 0x018[0]) to ensure optimal performance.
For internal VCO and clock distribution applications, use the
register settings that are shown in Table 24.
Table 24. Settings When Using Internal VCO
Register
Function
0x010[1:0] = 00b
PLL normal operation (PLL on).
0x010 to 0x01D
PLL settings. Select and enable a reference
input; set R, N (P, A, B), PFD polarity, and ICP
according to the intended loop configuration.
0x018[0] = 0b,
0x232[0] = 1b
Reset VCO calibration. This is not required
the first time after power-up, but it must be
performed subsequently.
0x1E0[2:0]
Set VCO divider to divide-by-2, divide-by-3,
divide-by-4, divide-by-5, and divide-by-6.
0x1E1[0] = 0b
Use the VCO divider as the source for the
distribution section.
0x1E1[1] = 1b
Select VCO as the source.
0x018[0] = 1b,
0x232[0] = 1b
Initiate VCO calibration.
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