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| 型號： | MAX2120 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Complete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications |
| 中文描述： | 完備的直接變頻調(diào)諧器，用于DVB-S和免費(fèi)廣播系統(tǒng) |
| 文件頁數(shù)： | 11/21頁 |
| 文件大?。?/td> | 316K |
| 代理商： | MAX2120 |
M
Complete, Direct-Conversion Tuner for DVB-S
and Free-to-Air Applications
______________________________________________________________________________________
11
BIT NAME
BIT LOCATION (0 = LSB)
DEFAULT
FUNCTION
CPMP[1:0]
7, 6
00
Charge-pump minimum pulse width. Users must program to 00
upon powering up the device.
CPLIN[1:0]
5, 4
00
Controls charge-pump linearity.
00 = Typically balanced charge and sink currents.
Other values are not tested.
X
3–0
X
Don’t care.
Table 4. Charge-Pump Register
BIT NAME
BIT LOCATION (0 = LSB)
DEFAULT
FUNCTION
XD[2:0]
7, 6, 5
000
Sets the crystal-divider setting.
000 = Divide by 1 (default)
001 = Divide by 2
011 = Divide by 3
100 = Divide by 4
101 through 110 = All divide values from 5 (101) to 7 (110)
111 = Divide by 8
R[4:0]
4–0
00100
Sets the PLL reference-divider (R) number.
00001 = Divide by 1
00010 = Divide by 2
00011 = Divide by 3
00100 = Divide by 4 (default)
00101 through 11110 = All divide values from 3 (00101) to 29
(11110)
11111 = Divide by 31
Table 5. XTAL Buffer and Reference Divider Register
BIT NAME
BIT LOCATION (0 = LSB)
DEFAULT
FUNCTION
D24
7
1
VCO divider setting.
0 = Divide by 2
1 = Divide by 4 (default)
CPS
6
1
Charge-pump current mode. Users must program to 0 upon
powering up the device.
0 = Charge-pump current controlled by ICP bit
1 = Charge-pump current controlled by VCO autoselect (VAS)
ICP
5
0
Charge-pump current.
0 = 600μA typical
1 = 1200μA typical
X
4–0
X
Don’t care.
Table 6. PLL Register
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| MAX2120_10 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Complete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications |
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