參數資料
型號: AD9557BCPZ-REEL7
廠商: Analog Devices Inc
文件頁數: 66/92頁
文件大?。?/td> 0K
描述: IC CLK XLATR PLL 1250MHZ 40LFCSP
產品變化通告: Minor Mask Change 11/Apr/2012
標準包裝: 750
類型: 時鐘/頻率轉換器
PLL:
主要目的: 以太網,SONET/SDH
輸入: CMOS,LVDS,LVPECL
輸出: CMOS,HSTL,LVDS
電路數: 1
比率 - 輸入:輸出: 2:2
差分 - 輸入:輸出: 是/是
頻率 - 最大: 1.25GHz
電源電壓: 1.71 V ~ 3.465 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 40-VFQFN 裸露焊盤,CSP
供應商設備封裝: 40-LFCSP-VQ(6x6)
包裝: 帶卷 (TR)
Data Sheet
AD9557
Rev. B | Page 69 of 92
Table 52. IRQ Mask for Reference Inputs
Address
Bits
Bit Name
Description
0x020E
7
Reserved
6
REFB validated
Enables IRQ for indicating that REFB has been validated
5
REFB fault cleared
Enables IRQ for indicating that REFB has been cleared of a previous fault
4
REFB fault
Enables IRQ for indicating that REFB has been faulted
3
Reserved
2
REFA validated
Enables IRQ for indicating that REFA has been validated
1
REFA fault cleared
Enables IRQ for indicating that REFA has been cleared of a previous fault
0
REFA fault
Enables IRQ for indicating that REFA has been faulted
0x020F
[7:0]
Reserved
Table 53. Watchdog Timer 11
Address
Bits
Bit Name
Description
0x0210
[7:0]
Watchdog timer (ms)
Watchdog timer bits[7:0] Default: 0x00
0x0211
[7:0]
Watchdog timer bits[15:8] Default: 0x00
1
Note that the watchdog timer is expressed in units of milliseconds (ms). The default value is 0 (disabled).
DPLL CONFIGURATION (REGISTER 0x0300 TO REGISTER 0x032E)
Table 54. Free Run Frequency Tuning Word1
Address
Bits
Bit Name
Description
0x0300
[7:0]
30-bit free run frequency tuning word
Free run frequency tuning word bits[7:0]; default: 0x11
0x0301
[7:0]
Free run frequency tuning word bits[15:8]; default: 0x15
0x0302
[7:0]
Free run frequency tuning word bits[23:9]; default: 0x64
0x0303
[7:6]
Reserved
[5:0]
30-bit free run frequency word
Free run frequency tuning word bits[29:24]: default: 0x1B
1
Note that the default free run tuning word is 0x1B641511, which is used for 8 kHz/19.44 MHz = 622.08 MHz translation.
Table 55. Digital Oscillator Control
Address
Bits
Bit Name
Description
0x0304
[7:6]
Reserved
Default: 00b
5
DCO 4-level output
0 (default) = DCO 3-level output mode
1 = enables DCO 4-level output mode
4
Reserved
Reserved (must be set to 1b)
[3:0]
Reserved
Reserved (default: 0x0)
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