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參數(shù)資料
| 型號： | MC44827DTB |
| 廠商： | MOTOROLA INC |
| 元件分類： | XO, clock |
| 英文描述： | LOW-POWER PLL TUNING CIRCUIT |
| 中文描述： | PHASE LOCKED LOOP, 1300 MHz, PDSO16 |
| 封裝： | PLASTIC, TSSOP-16 |
| 文件頁數(shù)： | 7/8頁 |
| 文件大?。?/td> | 157K |
| 代理商： | MC44827DTB |
MC44827/27B
7
MOTOROLA ANALOG IC DEVICE DATA
Figure 7. Equivalent Circuit of the Lock Output
2.0 k
25 V Protection
Lock
VCC1 5.0 V
100 k
200
μ
A Typical
“On”/“Off”
5.0 k
“Off”/“On”
The Operational Amplifier
The operational amplifier is designed for very low noise,
low input bias current and high power supply rejection. The
positive input is biased internally. The operational amplifier
needs 28.5 V supply (VCC2) as minimum voltage for a
guaranteed maximum tuning voltage of 28 V.
Figure 8 shows a possible filter arrangement. The
component values depend very much on the application
(tuner characteristic, reference frequency, etc.).
The Oscillator
The oscillator uses a 3.2 or a 4.0 MHz crystal tied to ground
in series with a capacitor. The crystal operates in the series
resonance mode.
The voltage at Pin 3 has low amplitude and low harmonic
distortion.
Power Dissipation
The typical power dissipation of the circuit is about
200 mW (VTUN = 15 V with internal pull–up of 60 k
, one
buffer “On” at 30 mA). It is calculated with the following
formula:
PD
VCC1x ICC1
VCC2– VTUN
60 k
x VCC2
VCC3x ICC3
Vsat(buffer)x Iout(buffer)
Example: (5 x 23)
32 – 15
60
x 32
(12 x 6.5)
(0.15 x 30)
206.5
1.0 nF
÷
8
Pres
Figure 8. Typical Tuner Application
11
12
13
10
B3
B2
B1
B0
12 pF
3.2/4.0 MHz
Gnd
9
6
5
4
15
Lock
B III
VHF
UHF
AGC
VTUN
33 V
Phase
Comp
Vref
Mixer
B. P. Filter
Antenna
Filter
Oscillator
IF
7
5.0 V
2
1
16
3
Osc &
Ref Div
8
Fosc
CL
DA
EN
VCC3
14 12 V
Bus
Rec
8.2 nF
120 k
(Note 1)
330 p
18 nF
NOTE:
1. 330 pF minimum is required for stability.
External Switching
MC44827/27B
Program
Divider
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相關代理商/技術參數(shù) |
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|---|---|
| MC44829 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:TV AND VCR I2C PLL TUNING CIRCUIT WITH 1.3 GHz PRESCALER AND MIX/OSC DECODER |
| MC44829D | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:TV AND VCR I2C PLL TUNING CIRCUIT WITH 1.3 GHz PRESCALER AND MIX/OSC DECODER |
| MC44829DR2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
| MC4485 | 制造商:SHENZHENFREESCALE 制造商全稱:ShenZhen FreesCale Electronics. Co., Ltd 功能描述:P-Channel 40-V (D-S) MOSFET High performance trench technology |
| MC44864 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PLL TUNING CIRCUIT WITH 1.3 GHz PRESCALER AND D/A CONVERTERS |
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