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MC3363DW PDF预览

MC3363DW

更新时间: 2024-02-12 23:42:20
品牌 Logo 应用领域
摩托罗拉 - MOTOROLA 消费电路商用集成电路接收器集成电路光电二极管
页数 文件大小 规格书
10页 340K
描述
LOW POWER DUAL CONVERSION FM RECEIVER

MC3363DW 技术参数

是否Rohs认证:不符合生命周期:Obsolete
零件包装代码:SOIC包装说明:SOP,
针数:28Reach Compliance Code:unknown
风险等级:5.87Is Samacsys:N
商用集成电路类型:AUDIO SINGLE CHIP RECEIVER解调类型:FM
谐波失真:2%JESD-30 代码:R-PDSO-G28
JESD-609代码:e0长度:17.9 mm
功能数量:1端子数量:28
最高工作温度:85 °C最低工作温度:-40 °C
标称输出电压(调频):200 mV封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):NOT SPECIFIED
认证状态:Not Qualified座面最大高度:2.65 mm
最大压摆率:8 mA最大供电电压 (Vsup):6 V
最小供电电压 (Vsup):2 V表面贴装:YES
技术:BIPOLAR温度等级:INDUSTRIAL
端子面层:Tin/Lead (Sn/Pb)端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:7.5 mm
Base Number Matches:1

MC3363DW 数据手册

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MC3363  
parallel LC tank is needed externally from Pin 14 to V . A 68  
kshunt resistance is included which determines the peak  
separation of the quadrature detector; a smaller value will  
lower the Q and expand the deviation range and linearity, but  
decrease recovered audio and sensitivity.  
A data shaping circuit is available and can be coupled to  
the recovered audio output of Pin 16. The circuit is a  
comparator which is designed to detect zero crossings of  
FSK modulation. Data rates of up to 35000 baud are  
detectable using the comparator. Best sensitivity is obtained  
when data rates are limited to 1200 baud maximum.  
Hysteresis is available by connecting a high-valued resistor  
from Pin 17 to Pin 18. Values below 120 kare not  
recommended as the input signal cannot overcome the  
hysteresis.  
CIRCUIT DESCRIPTION  
CC  
The MC3363 is a complete FM narrowband receiver from  
RF amplifier to audio preamp output. The low voltage dual  
conversion design yields low power drain, excellent  
sensitivity and good image rejection in narrowband voice and  
data link applications.  
In the typical application, the input RF signal is amplified  
by the RF transistor and then the first mixer amplifies the  
signal and converts the RF input to 10.7 MHz. This IF signal  
is filtered externally and fed into the second mixer, which  
further amplifies the signal and converts it to a 455 kHz IF  
signal. After external bandpass filtering, the low IF is fed into  
the limiting amplifier and detection circuitry. The audio is  
recovered using a conventional quadrature detector.  
Twice-IF filtering is provided internally.  
The meter drive circuitry detects input signal level by  
monitoring the limiting of the limiting amplifier stages.  
Figure 5 shows the unloaded current at Pin 12 versus input  
power. The meter drive current can used directly (RSSI) or  
can be used to trip the carrier detect circuit at a specified  
input power.  
The input signal level is monitored by meter drive circuitry  
which detects the amount of limiting in the limiting amplifier.  
The voltage at the meter drive pin determines the state of the  
carrier detect output, which is active low.  
APPLICATIONS INFORMATION  
A muting op amp is provided and can be triggered by the  
carrier detect output (Pin 13). This provides a carrier level  
triggered squelch circuit which is activated when the RF input  
at the desired input frequency falls below a present level. The  
level at which this occurs is determined by the resistor placed  
The first local oscillator is designed to serve as the VCO in  
a PLL frequency synthesized receiver. The MC3363 can  
operate together with the MC145166/7 to provide a two-chip  
ten–channel frequency synthesized receiver in the 46/49  
cordless telephone band. The MC3363 can also be used with  
the MC14515X series of CMOS PLL synthesizers and  
MC120XX series of ECL prescalers in VHF frequency  
synthesized applications to 200 MHz.  
between the meter drive output (Pin 12) and V . Values  
CC  
between 80130 kare recommended. This type of squelch  
is pictured in Figures 3 and 4.  
Hysteresis is available by connecting a high-valued  
resistor Rh between Pins 12 and 13. The formula is:  
For single channel applications the first local oscillator can  
be crystal controlled. The circuit of Figure 4 has been used  
successfully up to 60 MHz. For higher frequencies an  
external oscillator signal can be injected into Pins 25 and/or  
26 — a level of approximately 100 mVrms is recommended.  
The first mixers transfer characteristic is essentially flat to  
450 MHz when this approach is used (keeping a constant  
10.7 MHz IF frequency). The second local oscillator is a  
Colpitts type which is typically run at 10.245 MHz under  
crystal control.  
The mixers are doubly balanced to reduce spurious  
responses. The first and second mixers have conversion  
gains of 18 dB and 21 dB (typical), respectively. Mixer gain is  
stable with respect to supply voltage. For both conversions,  
the mixer impedances and pin layout are designed to allow  
the user to employ low cost, readily available ceramic filters.  
Following the first mixer, a 10.7 MHz ceramic bandpass  
filter is recommended. The 10.7 MHz filtered signal is then  
fed into the second mixer input Pin 21, the other input Pin 22  
–7  
/ (Rh x 10 ) dB  
Hyst = V  
CC  
The meter drive can also be used directly to drive a meter  
or to provide AGC. A current to voltage converter or other  
linear buffer will be needed for this application.  
A second possible application of the op amp would be in a  
noise triggered squelch circuit, similar to that used with the  
MC3357/MC3359/MC3361B FM IFs. In this case the op amp  
would serve as an active noise filter, the output of which  
would be rectified and compared to a reference on a squelch  
gate. The MC3363 does not have a dedicated squelch gate,  
but the NPN RF input stage or data shaping comparator  
might be used to provide this function if available. The op  
amp is a basic type with the inverting input and the output  
available. This application frees the meter drive to allow it to  
be used as a linear signal strength monitor.  
The circuit of Figure 4 is a complete 50 MHz receiver from  
antenna input to audio preamp output. It uses few  
components and has good performance. The receiver  
operates on a single channel and has input sensitivity of  
0.3 µV for 12 dB SINAD.  
being connected to V  
.
CC  
The 455 kHz IF is filtered by a ceramic narrow bandpass  
filter then fed into the limiter input Pin 9. The limiter has 10 µV  
sensitivity for 3.0 dB limiting, flat to 1.0 MHz.  
The output of the limiter is internally connected to the  
quadrature detector, including a quadrature capacitor. A  
NOTE: For further application and design information, refer to AN980.  
4
MOTOROLA ANALOG IC DEVICE DATA  

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