參數(shù)資料
型號(hào): AD9553BCPZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 33/44頁(yè)
文件大?。?/td> 0K
描述: IC INTEGER-N CLCK GEN 32LFCSP
標(biāo)準(zhǔn)包裝: 1
類型: 時(shí)鐘/頻率轉(zhuǎn)換器
PLL:
主要目的: 以太網(wǎng),GPON,SONET/SHD,T1/E1
輸入: CMOS,LVDS,晶體
輸出: CMOS,LVDS,LVPECL
電路數(shù): 1
比率 - 輸入:輸出: 1:2
差分 - 輸入:輸出: 是/是
頻率 - 最大: 810MHz
電源電壓: 3.135 V ~ 3.465 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 32-WFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 32-LFCSP(5x5)
包裝: 托盤
配用: AD9553/PCBZ-ND - BOARD EVAL FOR AD9553
AD9553
Rev. A | Page 39 of 44
REFB Frequency Control (Register 0x23 to Register 0x26)
Table 35.
Address
Bit
Bit Name
Description
0x23
[7:0]
REFB divider (R
B)
Bits[13:6] of the 14-bit REFB divider.
0x24
[7:2]
REFB divider (R
B)
Bits[5:0] of the 14-bit REFB divider (default: R
B = 8192 decimal). The REFB divider bits
are ineffective unless Register 0x24[1] = 1.
1
Enable SPI control of R
B
Enables SPI port control of the REFB divider value (R
B).
0 = the A3 to A0 pins define R
B per Table 14 (default).
1 = the 14-bit value in the REFB divider register defines R
B.
0
Unused
Unused.
0x25
7
Enable SPI control of ×2
B
Enables SPI control of the REFB ×2 frequency multiplier (×2
B) per Register 0x25[6].
0 = the device automatically selects ×2
B per Table 14 (default).
1 = Register 0x25[6] controls the selection of ×2
B.
6
Select ×2
B
Selects ×2
B. This bit is ineffective unless Register 0x25[7] = 1.
0 = bypass ×2
B (default).
1 = select ×2
B.
5
Enable SPI control of ÷5
B
Enables SPI control of the ÷5
B prescaler per Register 0x25[4].
0 = the device automatically selects ÷5
B per Table 14 (default).
1 = Register 0x25[4] controls the selection of ÷5
B.
4
Select ÷5
B
Selects ÷5
B. This bit is ineffective unless Register 0x25[5] = 1.
0 = bypass ÷5
B (default).
1 = select ÷5
B.
[3:0]
Unused
Unused.
0x26
[7:0]
Unused
Unused.
DCXO Frequency and Reference Switchover Control (Register 0x27 to Register 0x31)
Table 36.
Address
Bit
Bit Name
Description
0x27
[7:0]
XO divider (R
XO)
Bits[13:6] of the 14-bit XO divider.
0x28
[7:2]
XO divider (R
XO)
Bits[5:0] of the 14-bit XO divider (default: R
XO = 4096 decimal). The XO divider bits are
ineffective unless Register 0x28[1] = 1.
1
Enable SPI control of R
XO
Enables SPI port control of the XO divider value (R
XO).
0 = the A3 to A0 pins define R
XO per Table 14 (default).
1 = the 14-bit value in the XO divider register defines R
XO.
0
Unused
Unused.
0x29
[7:6]
Switchover mode
Selects the switchover operating mode.
00 = revertive switchover (default).
01 = nonrevertive switchover.
10 = selects REFA as the active reference.
11 = selects REFB as the active reference.
5
REFA diff
Enables the differential input reference function.
0 = normal single-ended operation of REFA and REFB (default).
1 = REFA configured as a differential reference in which the REFA pin functions as one
differential input and the REFB/REFA pin functions as the other differential input. In this
configuration, the REFB channel and switchover functionality are both unavailable.
[4:0]
Unused
Unused.
0x2A to
0x31
[7:0]
Unused
Unused.
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