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參數(shù)資料
| 型號： | 935205860118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 1400 MHz, PDSO20 |
| 封裝： | 4.40 MM, PLASTIC, SSOP-20 |
| 文件頁數(shù)： | 5/23頁 |
| 文件大?。?/td> | 257K |
| 代理商： | 935205860118 |
1996 Dec 17
13
Philips Semiconductors
Product specication
1.4 GHz I2C-bus controlled multimedia
synthesizer
TSA5523M
Fig.5 Prescaler Smith chart (S11) of typical input impedance (ZL =50 ; pin 2).
handbook, full pagewidth
MGG753
0.2
0.5
1
2
5
0.2
0.5
1
2
5
10
∞
0
0.2
0.5
1
2
5
10
+ j
j
1.3 GHz
1 GHz
100 MHz
500 MHz
APPLICATION INFORMATION
Tuning amplier
The tuning amplifier is able to drive the varicap voltage
without an external transistor. The Vtune output must be
connected to an external load of 27 k
connected to the
tuning voltage supply. Figures 6 and 7 illustrate a possible
loop filter. The component values depend on the oscillator
characteristics and the selected reference frequency.
Crystal oscillator
The crystal oscillator uses a 4.0 MHz crystal in series with
an 18 pF capacitor. The crystal operates in the series
resonance mode. The connection to VCC1 is preferred, but
it can also be connected to GND.
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