參數(shù)資料
型號(hào): AD9520-1/PCBZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 66/80頁(yè)
文件大?。?/td> 0K
描述: BOARD EVAL FOR AD9520-1
設(shè)計(jì)資源: Synchronizing Multiple AD9910 1 GSPS Direct Digital Synthesizers (CN0121)
Phase Coherent FSK Modulator (CN0186)
AD9520 Eval Brd Schematic
AD9520 BOM
標(biāo)準(zhǔn)包裝: 1
主要目的: 計(jì)時(shí),時(shí)鐘發(fā)生器
嵌入式:
已用 IC / 零件: AD9520-1
主要屬性: 12 LVPECL/24 CMOS 輸出時(shí)鐘發(fā)生器,帶 2.5 GHz VCO
次要屬性: SPI 和 I2C 兼容控制端口
已供物品: 板,線纜,CD,電源
產(chǎn)品目錄頁(yè)面: 776 (CN2011-ZH PDF)
相關(guān)產(chǎn)品: AD9520-1BCPZ-REEL7-ND - IC CLOCK GEN 2.5GHZ VCO 64LFCSP
AD9520-1BCPZ-ND - IC CLOCK GEN 2.5GHZ VCO 64LFCSP
Data Sheet
AD9520-1
Rev. A | Page 69 of 80
Reg.
Addr.
(Hex)
Bits
Name
Description
[4:0]
REFMON pin
control
Selects the signal that is connected to the REFMON pin.
Bit
4
Bit
3
Bit
2
Bit
1
Bit
0
Level or
Dynamic
Signal
Signal at REFMON Pin
0
LVL
Ground, dc (default).
0
1
DYN
REF1 clock (differential reference when in differential mode).
0
1
0
DYN
REF2 clock (N/A in differential mode).
0
1
DYN
Selected reference to PLL (differential reference when in differential mode).
0
1
0
DYN
Unselected reference to PLL (not available in differential mode).
0
1
0
1
LVL
Status of selected reference (status of differential reference); active high.
0
1
0
LVL
Status of unselected reference (not available in differential mode); active high.
0
1
LVL
Status of REF1 frequency; active high.
0
1
0
LVL
Status of REF2 frequency; active high.
0
1
0
1
LVL
(Status of REF1 frequency) AND (status of REF2 frequency).
0
1
0
1
0
LVL
(DLD) AND (status of selected reference) AND (status of VCO).
0
1
0
1
LVL
Status of VCO frequency; active high.
0
1
0
LVL
Selected reference (low = REF1, high = REF2).
0
1
0
1
LVL
DLD; active high.
0
1
0
LVL
Holdover active; active high.
0
1
LVL
N/A. Do not use.
1
0
LVL
VS (PLL power supply).
1
0
1
DYN
REF1 clock (differential reference when in differential mode).
1
0
1
0
DYN
REF2 clock (not available in differential mode).
1
0
1
DYN
Selected reference to PLL (differential reference when in differential mode).
1
0
1
0
DYN
Unselected reference to PLL (not available when in differential mode).
1
0
1
0
1
LVL
Status of selected reference (status of differential reference); active low.
1
0
1
0
LVL
Status of unselected reference (not available in differential mode); active low.
1
0
1
LVL
Status of REF1 frequency; active low.
1
0
LVL
Status of REF2 frequency; active low.
1
0
1
LVL
(Status of REF1 frequency) AND (status of REF2 frequency).
1
0
1
0
LVL
(DLD) AND (status of selected reference) AND (status of VCO).
1
0
1
LVL
Status of VCO frequency; active low.
1
0
LVL
Selected reference (low = REF2, high = REF1).
1
0
1
LVL
DLD; active low.
1
0
LVL
Holdover active; active low.
1
LVL
N/A. Do not use.
0x01C 7
Disable
switchover
deglitch
Disables or enables the switchover deglitch circuit.
0: enables the switchover deglitch circuit (default).
1: disables the switchover deglitch circuit.
6
Select REF2
If Register 0x01C[5] = 0b, selects the reference for PLL when in manual; register selected reference control.
0: selects REF1 (default).
1: selects REF2.
5
Use REF_SEL pin If Register 0x01C[4] = 0b (manual), sets the method of PLL reference selection.
0: uses Register 0x01C[6] (default).
1: uses REF_SEL pin.
4
Enable automatic
reference
switchover
Automatic or manual reference switchover. Single-ended reference mode must be selected by Register 0x01C[0] = 0b.
0: manual reference switchover (default).
1: automatic reference switchover. Setting this bit also powers on REF1 and REF2 and overrides the settings in Register 0x01C[2:1].
3
Stay on REF2
Stays on REF2 after switchover.
0: returns to REF1 automatically when REF1 status is good again (default).
1: stays on REF2 after switchover. Does not automatically return to REF1.
2
Enable REF2
This bit turns the REF2 power on. This bit is overridden when automatic reference switchover is enabled.
0: REF2 power off (default).
1: REF2 power on.
1
Enable REF1
This bit turns the REF1 power on. This bit is overridden when automatic reference switchover is enabled.
0: REF1 power off (default).
1: REF1 power on.
0
Enable
differential ref
Selects the PLL reference mode, differential or single-ended. Register 0x01C[2:1] should be cleared when this bit is set.
0: single-ended reference mode (default); 1: differential reference mode.
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