SA614AN

更新时间： 2024-02-14 23:48:36

品牌	Logo	应用领域
恩智浦 - NXP		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
14页	220K
描述
Low power FM IF system

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中文翻译

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技术参数
数据手册

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SA614AN 技术参数

生命周期：	Obsolete	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.64
Is Samacsys：	N	商用集成电路类型：	AUDIO DEMODULATOR
解调类型：	FM	JESD-30 代码：	R-PDIP-T16
功能数量：	1	端子数量：	16
最高工作温度：	85 °C	最低工作温度：	-40 °C
标称输出电压（调频）：	530 mV	封装主体材料：	PLASTIC/EPOXY
封装形状：	RECTANGULAR	封装形式：	IN-LINE
认证状态：	Not Qualified	信噪比Nom（FM）：	68 dB
最大压摆率：	4 mA	最大供电电压 (Vsup)：	8 V
最小供电电压 (Vsup)：	4.5 V	表面贴装：	NO
温度等级：	INDUSTRIAL	端子形式：	THROUGH-HOLE
端子位置：	DUAL	Base Number Matches：	1

SA614AN 数据手册

Philips Semiconductors

Product specification

Low power FM IF system

SA614A

42k

V+

40k

BPF

40k

80k

SR00329

SR00330

Figure 7. Second Limiter and Quadrature Detector

Figure 8. Feedback Paths

HIGH IMPEDANCE

BPF

HIGH IMPEDANCE

BPF

LOW IMPEDANCE

a. Terminating High Impedance Filters with Transformation to Low Impedance

BPF

RESISTIVE LOSS INTO BPF

b. Low Impedance Termination and Gain Reduction

Figure 9. Practical Termination

SR00331

430

614A

430

SR00332

Figure 10. Crystal Input Filter with Ceramic Interstage Filter

Because of the very high gain, bandwidth and input impedance of

the limiters, there is a very real potential for instability at IF

frequencies above 455kHz. The basic phenomenon is shown in

Figure 8. Distributed feedback (capacitance, inductance and

radiated fields) forms a divider from the output of the limiters back to

the inputs (including RF input). If this feedback divider does not

cause attenuation greater than the gain of the forward path, then

oscillation or low level regeneration is likely. If regeneration occurs,

two symptoms may be present: (1)The RSSI output will be high with

no signal input (should nominally be 250mV or lower), and (2) the

demodulated output will demonstrate a threshold. Above a certain

1997 Nov 07

1...5 6 789 10 11...14

中文翻译

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