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參數(shù)資料
| 型號： | MB551 |
| 廠商： | Fujitsu Limited |
| 英文描述： | Prescaler with VCO (Dual-Modulus, 1.0 GHz)(帶壓控振蕩器的預定標器) |
| 中文描述： | 與VCO的預分頻器（雙模量，1.0千兆赫）（帶壓控振蕩器的預定標器） |
| 文件頁數(shù)： | 1/17頁 |
| 文件大?。?/td> | 178K |
| 代理商： | MB551 |
1
DS04-21600-3E
FUJITSU SEMICONDUCTOR
DATA SHEET
ASSP
for DTS
BIPOLAR
Prescaler with VCO (Dual-Modulus, 1.0 GHz)
MB551
I
DESCRIPTION
The MB551 is a dual-modulus prescaler incorporating a voltage controlled oscillator (VCO) used for 900-MHz
band frequency synthesizers. The MB551 consists of: a Colpitts oscillator with grounded base capacitor, a buffer
amplifier with collector open output, a prescaler interface circuit, and a dual-modulus prescaler operating at
frequencies divided by 128/129. The oscillator block accommodates external components such as a capacitor,
a dielectric oscillator (resonator), and a variable capacitor, making up the VCO.
The VCO and the prescaler are connected by an internal control circuit, minimizing the effects of prescaler input
load variation on VCO characteristics such as a C/N ratio.
The MB551 operates at 5 V (typical) and draws 16 mA of current (typical).
I
FEATURES
Oscillator frequency: 1 GHz (Max)
Low power consumption: I
Oscillator output power: 0 dBm (Typical)
C/N ratio: 70 dB (Typical)
65 dB (Typical)
S/N ratio: 45 dB (Typical)
Stable oscillator output
Supply voltage dependence:
Frequency stability: 35 ppm/
CC
= 16 mA (Typical)
Measurement conditions:
Measurement conditions:
Measurement conditions: BW = 0.3 to 3 kHz, 3 kHz.Dev, 1 kHz Tone
f = 50 kHz, BW = 15 kHz
f = 25 kHz, BW = 15 kHz
±
C (Typical)
200 kHz/V (Typical)
°
(Continued)
I
PACKAGE
8 pin Plastic SOP
(FPT-8P-M01)
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