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SA627N

更新时间： 2024-01-07 00:15:45
品牌 Logo 应用领域
恩智浦 - NXP /
页数 文件大小 规格书
16页 127K
描述
IC 1-BAND, AUDIO TUNER, PDIP20, Tuner IC

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SA627N 技术参数

是否Rohs认证：不符合生命周期：Transferred
包装说明：DIP, DIP20,.3Reach Compliance Code：unknown
风险等级：5.78Is Samacsys：N
JESD-30 代码：R-PDIP-T20JESD-609代码：e0
端子数量：20最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：DIP封装等效代码：DIP20,.3
封装形状：RECTANGULAR封装形式：IN-LINE
电源：6 V认证状态：Not Qualified
子类别：Receiver ICs最大压摆率：6.75 mA
表面贴装：NO技术：BIPOLAR
温度等级：INDUSTRIAL端子面层：Tin/Lead (Sn/Pb)
端子形式：THROUGH-HOLE端子节距：2.54 mm
端子位置：DUALBase Number Matches：1

SA627N 数据手册

 浏览型号SA627N的Datasheet PDF文件第2页浏览型号SA627N的Datasheet PDF文件第3页浏览型号SA627N的Datasheet PDF文件第4页浏览型号SA627N的Datasheet PDF文件第6页浏览型号SA627N的Datasheet PDF文件第7页浏览型号SA627N的Datasheet PDF文件第8页 
Philips Semiconductors  
Product specification  
High performance low power mixer FM IF system  
with high-speed RSSI  
SA627  
AC ELECTRICAL CHARACTERISTICS(Continued)  
LIMITS  
SA627  
TYP  
SYMBOL  
PARAMETER  
TEST CONDITIONS  
UNITS  
MAX  
MIN  
IF section (continued)  
Muted audio output resistance  
RF/IF section (int LO)  
System RSSI output  
58  
kΩ  
4.5V = V , RF level = -27dBm  
4.3  
V
CC  
NOTE:  
1. The generator source impedance is 50Ω, but the SA627 input impedance at Pin 18 is 1500Ω. As a result, IF level refers to the actual signal  
that enters the SA627 input (Pin 8) which is about 21dB less than the ”available power” at the generator.  
network does not cause 12dB(v) insertion loss, a fixed or variable  
resistor can be added between the first IF output (Pin 16) and the  
interstage network.  
CIRCUIT DESCRIPTION  
The SA627 is an IF signal processing system suitable for second IF  
or single conversion systems with input frequency as high as 1GHz.  
The bandwidth of the IF amplifier is about 40MHz, with 39.7dB(v) of  
gain from a 50Ω source. The bandwidth of the limiter is about  
28MHz with about 62.5dB(v) of gain from a 50Ω source. However,  
the gain/bandwidth distribution is optimized for 455kHz, 1.5kΩ  
source applications. The overall system is well-suited to battery  
operation as well as high performance and high quality products of  
all types.  
The signal from the second limiting amplifier goes to a Gilbert cell  
quadrature detector. One port of the Gilbert cell is internally driven  
by the IF. The other output of the IF is AC-coupled to a tuned  
quadrature network. This signal, which now has a 90° phase  
relationship to the internal signal, drives the other port of the  
multiplier cell.  
Overall, the IF section has a gain of 90dB. For operation at  
intermediate frequencies greater than 455kHz, special care must be  
given to layout, termination, and interstage loss to avoid instability.  
The input stage is a Gilbert cell mixer with oscillator. Typical mixer  
characteristics include a noise figure of 5dB, conversion gain of  
13dB, and input third-order intercept of -10dBm. The oscillator will  
operate in excess of 1GHz in L/C tank configurations. Hartley or  
Colpitts circuits can be used up to 100MHz for xtal configurations.  
Butler oscillators are recommended for xtal configurations up to  
150MHz.  
The demodulated output of the quadrature detector is available at  
two pins, one continuous and one with a mute switch. Signal  
attenuation with the mute activated is greater than 60dB. The mute  
input is very high impedance and is compatible with CMOS or TTL  
levels.  
The output of the mixer is internally loaded with a 1.5kΩ resistor  
permitting direct connection to a 455kHz ceramic filter. The input  
resistance of the limiting IF amplifiers is also 1.5kΩ. With most  
455kHz ceramic filters and many crystal filters, no impedance  
matching network is necessary. To achieve optimum linearity of the  
log signal strength indicator, there must be a 12dB(v) insertion loss  
between the first and second IF stages. If the IF filter or interstage  
A log signal strength completes the circuitry. The output range is  
greater than 90dB and is temperature compensated. This log signal  
strength indicator exceeds the criteria for AMPs or TACs cellular  
telephone.  
NOTE: dB(v) = 20log V  
/V  
OUT IN  
5
1997 Nov 07  
12345678...16

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