Datasheet > TDA4470-MFSG3Y

TDA4470-MFSG3Y

更新时间： 2024-01-08 21:45:15

品牌	Logo	应用领域
爱特美尔 - ATMEL		光电二极管商用集成电路
页数	文件大小	规格书
24页	252K
描述
Audio/Video Demodulator, AM/FM, Bipolar, PDSO28, ROHS COMPLIANT, SSOP-28

阅读下载

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

TDA4470-MFSG3Y 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	SSOP	包装说明：	SSOP, SSOP28,.25
针数：	28	Reach Compliance Code：	unknown
风险等级：	5.55	商用集成电路类型：	AUDIO/VIDEO DEMODULATOR
解调类型：	AM/FM	谐波失真：	1%
JESD-30 代码：	R-PDSO-G28	JESD-609代码：	e3
长度：	9.05 mm	湿度敏感等级：	1
功能数量：	1	端子数量：	28
最高工作温度：	85 °C	最低工作温度：	-10 °C
输出电压标称（AM）：	500 mV	标称输出电压（调频）：	250 mV
封装主体材料：	PLASTIC/EPOXY	封装代码：	SSOP
封装等效代码：	SSOP28,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, SHRINK PITCH	峰值回流温度（摄氏度）：	260
电源：	5 V	认证状态：	Not Qualified
信噪比Nom（FM）：	60 dB	子类别：	Other Consumer ICs
最大压摆率：	93 mA	最大供电电压 (Vsup)：	6 V
最小供电电压 (Vsup)：	4.5 V	表面贴装：	YES
技术：	BIPOLAR	温度等级：	COMMERCIAL EXTENDED
端子面层：	Matte Tin (Sn) - annealed	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	4.4 mm
Base Number Matches：	1

TDA4470-MFSG3Y 数据手册

TDA4470

2. Circuit Description

2.1

Vision IF Amplifier

The video IF signal (VIF) is fed through a SAW filter to the differential input (pins 6-7) of the VIF

amplifier. This amplifier consists of three AC-coupled amplifier stages. Each differential amplifier

is gain controlled by the automatic gain control (VIF-AGC). The output signal of the VIF amplifier

is applied to the FPLL carrier generation and the video demodulator.

2.2

Tuner-and VIF-AGC

At pin 8, the VIF-AGC charges/discharges the AGC capacitor to generate a control voltage for

setting the gain of the VIF amplifier and tuner in order to keep the video output signal at a con-

stant level. Therefore, the synchronous level of the demodulated video signal is the criterion for

a fast charge/discharge of the AGC capacitor. For positive modulation (e.g., L standard) the

peak white level of the video signal controls the charge current. In order to reduce the reaction

time for positive modulation, where a large time constant is needed, an additional black level

detector controls the discharge current in the event of decreasing VIF input signal. The control

voltage (AGC voltage at pin 8) is transferred to an internal control signal, and is fed to the tuner

AGC to generate the tuner AGC current at pin 11 (open collector output). The take-over point of

the tuner AGC can be adjusted at pin 10 by a potentiometer or an external DC voltage (from an

interface circuit or microprocessor).

2.3

FPLL, VCO and AFC

The FPLL (Frequency-Phase-Locked Loop) circuit consists of a frequency and phase detector to

generate the control voltage for the VCO tuning. In locked mode, the VCO is controlled by the

phase detector, in unlocked mode, the frequency detector is superimposed. The VCO operates

with an external resonance circuit (L and C in parallel) and is controlled by internal varicaps. The

VCO control voltage is also converted to a current and represents the AFC output signal at pin

22. At the AFC switch (pin 19) three operating conditions of the AFC are possible: the AFC curve

“rising” or “falling” and AFC “off”.

A practicable VCO alignment of the external coil is the adjustment to zero AFC output current at

pin 22. At the center frequency, the AFC output current is equal to zero. Furthermore, at pin 14,

the VCO center frequency can be switched to set it to the required L’ value (L’ standard).

The optional potentiometer at pin 26 allows an offset compensation of the VCO phase for

improved sound quality (fine adjustment). Without a potentiometer (open circuit at pin 26), this

offset compensation is not active.

The oscillator signal passes a phase shifter and supplies the in-phase signal (0°) and the

quadrature signal (90°) of the generated picture carrier.

4803C–TVVCR–10/05

1 234 5 6 7...24

下载PDF

与TDA4470-MFSG3Y相关器件

型号	品牌	描述	获取价格	数据表
TDA4470-MSD	TEMIC	Multistandard Video-IF and Quasi Parallel Sound Processing	获取价格
TDA4471	TEMIC	Multistandard Video-IF and Quasi Parallel Sound Processing	获取价格
TDA4471	ATMEL	Audio/Video Demodulator, PDIP30, SDIP-30	获取价格
TDA4471-DSD	VISHAY	Consumer IC, Bipolar, PDIP30,	获取价格
TDA4471-DSD	TEMIC	Audio/Video Demodulator, AM/FM, Bipolar, PDIP30, SDIP-30	获取价格
TDA4472	TEMIC	Video-IF and Quasi Parallel Sound Processing	获取价格

与TDA4470-MFSG3Y相关文章

MAX6675资料手册参数详解、引脚配置说明
2024-05-13

5
LM258引脚图及功能介绍、主要参数分析
2024-05-13

3
CD4052资料手册参数详解、引脚配置说明
2024-05-13

5
一文带你了解TPS5430资料手册分析：参数介绍、引脚配置说明
2024-05-13

5

产品中心

服务支持

精选活动

关于我们

帮助中心

TDA4470-MFSG3Y

TDA4470-MFSG3Y 技术参数

TDA4470-MFSG3Y 数据手册

与TDA4470-MFSG3Y相关器件

与TDA4470-MFSG3Y相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

TDA4470-MFSG3Y

TDA4470-MFSG3Y 技术参数

TDA4470-MFSG3Y 数据手册

与TDA4470-MFSG3Y相关器件

与TDA4470-MFSG3Y相关文章

您还可以找

您在本页遇到什么问题？