參數(shù)資料
型號: AD9523-1BCPZ
廠商: Analog Devices Inc
文件頁數(shù): 43/60頁
文件大?。?/td> 0K
描述: IC INTEGER-N CLCK GEN 72LFCSP
標準包裝: 1
類型: 時鐘/頻率發(fā)生器,扇出緩沖器(分配),多路復(fù)用器
PLL:
主要目的: 以太網(wǎng),光纖通道,SONET/SDH
輸入: CMOS
輸出: HSTL,LVCMOS,LVDS,LVPECL
電路數(shù): 1
比率 - 輸入:輸出: 2:14
差分 - 輸入:輸出: 是/是
頻率 - 最大: 1GHz
電源電壓: 1.768 V ~ 3.465 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 72-VFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 72-LFCSP
包裝: 托盤
配用: AD9523/PCBZ-ND - BOARD EVAL FOR AD9523
AD9523-1
Rev. B | Page 48 of 60
Table 42. PLL1 Miscellaneous Control
Address
Bits
Bit Name
Description
7
Enable REFB R divider
independent division control
1: REFB R divider is controlled by Register 0x012 and Register 0x013.
0: REFB R divider is set to the same setting as the REFA R divider (Register 0x010
and Register 0x011). This requires that, for the loop to stay locked, the REFA and
REFB input frequencies must be the same.
6
OSC_CTRL control voltage to
VCC/2 when reference clock fails
High permits the OSC_CTRL control voltage to be forced to midsupply when the
feedback or input clocks fail. Low tristates the charge pump output.
1: OSC_CTRL control voltage goes to VCC/2.
0: OSC_CTRL control voltage tracks the tristated (high impedance) charge pump
(through the buffer).
5
Reserved
Reserved.
Programs the REFA, REFB mode selection (default = 000).
REF_SEL
Pin
Bit 4
Bit 3
Bit 2
Description
0
Nonrevertive: stay on REFB.
0
1
Revert to REFA.
0
1
0
Select REFA.
0
1
Select REFB.
0
1
REF_SEL pin = 0 (low): REFA.
[4:2]
Reference selection mode
1
REF_SEL pin = 1 (high): REFB.
1
Bypass REFB R divider
Puts the divider into bypass mode (same as programming divider word to 0 or 1).
1: divider in bypass mode (divide = 1).
0: divider normal operation.
0x01C
0
Bypass REFA R divider
Puts the divider into bypass mode (same as programming divider word to 0 or 1).
1: divider in bypass mode (divide = 1).
0: divider normal operation.
1 X = don’t care.
Table 43. PLL1 Loop Filter Zero Resistor Control
Address
Bits
Bit Name
Description
[7:4]
Reserved
Reserved.
Programs the value of the zero resistor, RZERO.
Bit 3
Bit 2
Bit 1
Bit 0
RZERO Value (kΩ)
0
883
0
1
677
0
1
0
341
0
1
135
0
1
0
10
0
1
0
1
10
0
1
0
10
0
1
10
0x01D
[3:0]
PLL1 loop filter, RZERO
1
0
Use external resistor
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