参数资料
型号: TRF2050PW
厂商: TEXAS INSTRUMENTS INC
元件分类: PLL合成/DDS/VCOs
英文描述: PLL FREQUENCY SYNTHESIZER, 1200 MHz, PDSO20
封装: PLASTIC, SO-20
文件页数: 14/34页
文件大小: 543K
代理商: TRF2050PW
TRF2050
LOW-VOLTAGE 1.2-GHz FRACTIONAL-N/INTEGER-N SYNTHESIZER
SLWS030E– JUNE 1996 – REVISED OCTOBER 2000
21
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
Table 3. Extended Performance Mode Function Table
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
G
4
No
Speed-up mode duration (See Table 9)
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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