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參數(shù)資料
| 型號(hào)： | 935267009118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 2700 MHz, PDSO16 |
| 封裝： | 4.40 MM, PLASTIC, SSOP-16 |
| 文件頁數(shù)： | 27/27頁 |
| 文件大?。?/td> | 184K |
| 代理商： | 935267009118 |
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2000 Jul 11
9
Philips Semiconductors
Product specication
2.7 GHz I2C-bus controlled low phase
noise frequency synthesizer
TSA5059
Reference divider ratio
The reference divider ratio is set by 4 bits in the WRITE
mode, giving 16 different ratios which allow to adjust the
comparison frequency to different values, depending on
the compromise which has to be found between step size
and phase noise.
Table 8 shows the different dividing ratios and the
corresponding comparison frequencies and step size,
assuming the device is provided with a 4 MHz signal at
pin XTAL.
Table 8
Reference dividing ratios
Note
1. Only valid when the IC is used with a 4 MHz crystal.
Charge pump current
The charge pump current can be chosen from 4 different values depending on the value of bits C1 and C0 in the I2C-bus
byte 4, according to Table 9.
Table 9
Charge pump current
R3
R2
R1
R0
RATIO
COMPARISON
FREQUENCY(1)
STEP
BIT PE = 0(1)
BIT PE = 1(1)
0000
2
2 MHz
4 MHz
0001
4
1 MHz
2 MHz
0010
8
500 kHz
1 MHz
0011
16
250 kHz
500 kHz
0100
32
125 kHz
250 kHz
0101
64
62.5 kHz
125 kHz
0110
128
31.25 kHz
62.5 kHz
0111
256
15.625 kHz
31.25 kHz
1000
24
166.67 kHz
333.33 kHz
1001
5
800 kHz
1.6 MHz
1010
10
400 kHz
800 kHz
1011
20
200 kHz
400 kHz
1100
40
100 kHz
200 kHz
1101
80
50 kHz
100 kHz
1110
160
25 kHz
50 kHz
1111
320
12.5 kHz
25 kHz
C1
C0
Icp (A) (absolute value)
MIN.
TYP.
MAX.
0
100
135
170
0
1
210
280
350
1
0
450
600
750
1
920
1230
1560
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