STV8203

更新时间： 2024-02-12 10:05:54

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		消费电路商用集成电路接收器集成电路电视光电二极管
页数	文件大小	规格书
31页	192K
描述
MULTISTANDARD TV SOUND DEMODULATOR

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中文翻译

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技术参数
数据手册

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STV8203 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Obsolete	零件包装代码：	QFP
包装说明：	10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, TQFP-44	针数：	44
Reach Compliance Code：	not_compliant	风险等级：	5.92
Is Samacsys：	N	商用集成电路类型：	AUDIO DEMODULATOR
解调类型：	FM	JESD-30 代码：	S-PQFP-G44
JESD-609代码：	e0	长度：	10 mm
功能数量：	1	端子数量：	44
最高工作温度：	70 °C	最低工作温度：
标称输出电压（调频）：	2000 mV	封装主体材料：	PLASTIC/EPOXY
封装代码：	LQFP	封装等效代码：	QFP44,.47SQ,32
封装形状：	SQUARE	封装形式：	FLATPACK, LOW PROFILE
峰值回流温度（摄氏度）：	NOT SPECIFIED	电源：	5,8 V
认证状态：	Not Qualified	座面最大高度：	1.6 mm
子类别：	Other Consumer ICs	最大供电电压 (Vsup)：	5.25 V
最小供电电压 (Vsup)：	4.75 V	表面贴装：	YES
技术：	CMOS	温度等级：	COMMERCIAL
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	GULL WING
端子节距：	0.8 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	10 mm
Base Number Matches：	1

STV8203 数据手册

STV8203

FUNCTIONAL DESCRIPTION

As can be seen fromthe blockdiagram,theinputto

the demodulator section is selectable from one of

two I.F.sourcesviathe I²C bus. The selectedsignal

is then passed through an AGC block, having a

range of 28dB, before being digitised in the

ADC unit. A singlequartzcrystal (suggestedvalue :

between24.712MHzand 27MHz) is usedfor the all

thedigitalprocessing,includingdemodulation,iden-

tification, control, filtering. This has the advantage

ofa singleclocksignalsourceforthewholeICwhich

eliminates problems of multiple clock. The single

clock canbe chosento minimize interferencein the

TV IF and RF stages of the tuner system.

Appropriate de-emphasis networks in the digital

domain are applied to the resulting demodulated

signals (50µs, J17), followed by dematrixing if re-

quired. The digital datastream is then passed

through 2 x 16bits DACs before the audio matrix.

All this first section is working at 3.3V thanks to an

integrated voltage regulator.In stand-bymode, the

voltage regulator pulls the voltage down to zero,

ensuring no power dissipation in this part.

An audio matrix allows the selection of inputs ap-

pliedon the outputsSCART1,SCART2and MONO

according to the diagram shown in Figure 1.

The ”MOUT” outputs either the signal L1, or R1 or

(L1+R1)/2. Thisallowsto recordthe selectedchan-

nel in mono mode, for example on the linear chan-

nel of a VCR simultanously with the stereo mode.

The demodulatorsystem can identifyand demodu-

lateallthestandarddescribedintheTable1. There-

sult of the recognition is flagged up to the host

system via the I²C bus communication system.

Maximum output swing is 1V_RMS

In the case of NICAM transmissions, in the event

of a failure of the received signal or a degradation

of the bit error rate (BER) belowa prescribedlevel,

the system will automaticallydefault to the reserve

sound transmission on mono FM or AM.

The audio matrix section has its own power supply

regulator, allowing to keep this part working even

when the rest is in stand-by mode. This achieves a

”THRU” mode from input ”SCART1” to output

”SCART2”andinput”SCART2”tooutput”SCART1”.

For FM demodulation, the discriminator can nor-

mallyhandlesignalshaving 250kHzdeviation.This

covers all European standards, and ensure an

optimized compromise for the signal to noise ratio

inonehand,and overmodulationinthe otherhand.

However, it is possible to extand the deviation

range up to 500kHz(I²C programmable)in orderto

cover requests of some broadcasters.

The maximum output swing of both SCART1 and

SCART2 is 2V_RMS

Remark : Circuit operation is possible with only a

single 5V supply. In this case, the AV_CCsupply pin

is connectedto 5V. Maximum output swing is then

limitedto 1V_RMSand a 6dB attenuationis automat-

ically added to the DAC output. In that case, the

Ω

resistor shown as R2 = 39 in the ApplicationDia-

Fully automatic standard recognition and setting

can be achieve using simple routines.

gram (between Pin 8 and Pin 21) must be replace

by a short circuit to avoid clipping.

Figure 1 : Audio Matrix

MUTE

DAC

L1/R1

L2/R2

MUTE

LI2(SCART2)

MIN

AO1(SCART1)

MOUT

L1, R1,

(L1 + R1)/2

SELECTOR

GAIN

± 6dB

AO2(SCART2)

LI1(SCART1)

5/31

1 2 3 456 7 8...31

中文翻译

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与STV8203相关器件

型号	品牌	获取价格	描述	数据表
STV8203D	STMICROELECTRONICS	获取价格	MULTISTANDARD TV SOUND DEMODULATOR
STV8206	STMICROELECTRONICS	获取价格	Multistandard TV Audio Processor and Digital Sound Demodulator
STV8206D	STMICROELECTRONICS	获取价格	SPECIALTY CONSUMER CIRCUIT, PDIP56, 0.600 INCH, PLASTIC, SDIP-56
STV8207	STMICROELECTRONICS	获取价格	Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders
STV8207T	STMICROELECTRONICS	获取价格	Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders
STV8211	STMICROELECTRONICS	获取价格	VIDEO & SOUND IF SYSTEM
STV8216	STMICROELECTRONICS	获取价格	Multistandard TV Audio Processor and Digital Sound Demodulator
STV8216D	STMICROELECTRONICS	获取价格	SPECIALTY CONSUMER CIRCUIT, PDIP56, 0.600 INCH, PLASTIC, SDIP-56
STV8216T	STMICROELECTRONICS	获取价格	SPECIALTY CONSUMER CIRCUIT, PQFP80, PLASTIC, TQFP-80
STV8217	STMICROELECTRONICS	获取价格	Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders

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