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參數(shù)資料
| 型號： | TRF2056PWR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 1200 MHz, PDSO20 |
| 封裝： | PLASTIC, SOP-20 |
| 文件頁數(shù)： | 4/24頁 |
| 文件大?。?/td> | 327K |
| 代理商： | TRF2056PWR |
TRF2056
LOW VOLTAGE 1.2GHz FRACTIONALN/INTEGERN SYNTHESIZER
SLWS111– NOVEMBER 2000
12
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
Table 2. Extended Performance Mode Function
SYMBOL
BITS
SAME AS
SA7025
MODE
FUNCTION
ACP
1
No
Auxiliary charge polarity:
0 = Positive
1 = Negative
CK
4
Yes
Binary acceleration factor for integral charge pump current
CL
2
Yes
Binary acceleration factor for proportional charge pump current
CN
8
Yes
Binary current setting factor for main charge pumps
EA
1
Auxiliary divider enable flag:
0 = Disabled
1 = Enabled
EM
1
Yes
Main divider enable flag:
0 = Disabled
1 = Enabled
FMOD
5
No
Fraction accumulator modulus
MCP
1
No
Main charge pump polarity:
0 = Positive
1 = Negative
MS
2
No
Mode select
01 = Extended performance mode
N
18
No
Overall main divider integer division ratio (NM)
NA
12
Yes
Auxiliary divider ratio
NF
4
No
Fractional-N increment
NR
12
Yes
Reference divider ratio
PA
1
Yes
Auxiliary prescaler select:
0 = Divide by 4
1 = Divide by 1
SA
2
Yes
Reference select for auxiliary phase detector
SM
2
Yes
Reference select for main phase detector
T
2
Yes
Test mode connection of internal signals to the LOCK terminal:
00 = ACCU overflow
01 = Auxiliary divider
10 = Main divider
11 = Reference divider
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