Datasheet > LA1235

LA1235

更新时间： 2024-11-22 22:38:39

品牌	Logo	应用领域
三洋 - SANYO		/
页数	文件大小	规格书
12页	1032K
描述
FM IF System Applications

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技术参数
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LA1235 技术参数

生命周期：	Obsolete	零件包装代码：	DIP
包装说明：	DIP,	针数：	16
Reach Compliance Code：	unknown	风险等级：	5.82
商用集成电路类型：	AUDIO DEMODULATOR	解调类型：	FM
谐波失真：	0.015%	JESD-30 代码：	R-PDIP-T16
长度：	19.2 mm	功能数量：	1
端子数量：	16	最高工作温度：	70 °C
最低工作温度：	-20 °C	标称输出电压（调频）：	430 mV
封装主体材料：	PLASTIC/EPOXY	封装代码：	DIP
封装形状：	RECTANGULAR	封装形式：	IN-LINE
认证状态：	Not Qualified	座面最大高度：	3.65 mm
信噪比Nom（FM）：	88 dB	最大压摆率：	31 mA
最大供电电压 (Vsup)：	14 V	最小供电电压 (Vsup)：	10 V
表面贴装：	NO	温度等级：	OTHER
端子形式：	THROUGH-HOLE	端子节距：	2.54 mm
端子位置：	DUAL	宽度：	7.62 mm
Base Number Matches：	1

LA1235 数据手册

Ordering number : EN873F

Monolithic Linear IC

LA1235

FM IF System Applications

Overview

Package Dimensions

unit: mm

The LA1235 is a high integrated IC developed for use in

high S/N, low distortion FM IF system applications. This

IC features S/N=88dB, distortion factor=0.015% and has

almost all functions required for FM tuner IF stage.

3006B-DIP16

[LA1235]

The IF amplifier and limiter stage consist of 6 stages of

double ended differential amplifier having an excellent

AMR, and this stage is followd by the signal meter driver

which consists of 4 stages of level detector, thereby

creating extended linearity up to strong input. The FM

detector stage consists of a double balanced quadrature

detector to which a low frequency preamplifire and a

muting controller are attached. The muting drive stage

consists of an OR circuit for weak signal muting drive

output which detects signal intensity and detuning muting

drive output which detects S curve DC output and enables

the prevention of noise at the time of weak signal and

detuning. Further, the weak signal muting drive output

circuit contains a Schmitt circuit having hysteresis and

enables the prevention of muting malfunction due to

amplitude component at the time of weak signal. The AFC

output and tuning meter drive stage is of current drive type

which makes it possible to adjust AFC sensitivity and

muting band width by means of an external resistor, and

the built-in tuning meter null (short) circuit foreces the

tuning meter to be [0] when th IF amplifier stops working.

The IF amplifier stop circuit, being a circuit to stop the FM

IF amlifier at the time of AM reception, makes it possible

to decrease shock noise due to FM-AM receiving mode

switchover.

SANYO: DIP16

Functions

• IF amplifier, Limiter.

• Quadrature detection.

• AF preamplifier.

• Signal intesity muting drive output.

• Detuning muting drive output.

• AF signal muting circuit.

• Signal meter drive output.

• AFC, tuning meter drive output.

• IF amplifier stop circuit.

• Tunig meter null circuit.

Features

• High S/N (88dB typ.).

• Low distortion (0.015% typ.).

• Weak signal muting dirve output having hysteresis.

• Tuning mete null (short) circuit.

• Signal meter dirve output having wide dynamic range.

• High limiting sensitivity.

• Built-in constant-voltage regulated circuit (Operating

voltage : 10 to 14V).

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN

O2097HA (KT)/63095HA (KOTO) /O076AT/8044KI, TS/4241KI/3091KI No.873-1/12

12 3 4 5 6 7...12

中文翻译

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