TDA9874AHB

更新时间： 2024-02-14 00:48:54

品牌	Logo	应用领域
恩智浦 - NXP		解码器电视
页数	文件大小	规格书
68页	233K
描述
IC AM/FM, AUDIO DEMODULATOR, PQFP44, PLASTIC, QFP-44, Receiver IC

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TDA9874AHB 技术参数

是否Rohs认证：	不符合	生命周期：	Transferred
包装说明：	QFP, QFP44,.7SQ,40	Reach Compliance Code：	unknown
风险等级：	5.71	Is Samacsys：	N
JESD-30 代码：	S-PQFP-G44	JESD-609代码：	e0
端子数量：	44	最高工作温度：	70 °C
最低工作温度：	-20 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	QFP	封装等效代码：	QFP44,.7SQ,40
封装形状：	SQUARE	封装形式：	FLATPACK
电源：	5 V	认证状态：	Not Qualified
子类别：	Other Consumer ICs	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：	1 mm	端子位置：	QUAD
Base Number Matches：	1

TDA9874AHB 数据手册

Philips Semiconductors

Preliminary speciﬁcation

Digital TV sound demodulator/decoder

TDA9874A

FEATURES

• Sound IF (SIF) input switch

• SIF AGC with 24 dB control range

• Switchable 10 dB SIF input attenuator

• SIF 8-bit Analog-to-Digital Converter (ADC)

• Easy TV standard programming option

GENERAL DESCRIPTION

• Differential Quadrature Phase Shift Keying (DQPSK)

demodulation for different standards, simultaneously

with 1-channel FM demodulation

The TDA9874A is a single-chip Digital TV Sound

Demodulator/Decoder (DTVSD) for analog and digital

multi-channel sound systems in TV/VCR sets and satellite

receivers.

• NICAM decoding (B/G, D/K, I and L standard)

• 2-carrier multi-standard FM demodulation (B/G, D/K and

M standard)

2.1

Supported standards

• Single carrier high deviation FM mono demodulation

mode

The multi-standard/multi-stereo capability of the

TDA9874A is of interest in Europe, Hong Kong/PR China

and South East Asia. This includes B/G, D/K, I, M and

L standard. In other application areas subsets of the

standard combinations are available or, only single

standards are transmitted.

• Decoding for three analog multi-channel systems (A2)

and satellite sound

• Adaptive de-emphasis for satellite

• Programmable identification (B/G, D/K and M standard)

and different identification times

All A2 (analog 2-carrier) and NICAM systems are

supported. M standard (with mono or BTSC stereo sound)

can be received and processed in mono sound mode.

• FM pilot carrier presence detector

• Optional AM demodulation for system L, simultaneously

with NICAM

The AM sound of L/L’ standard is normally demodulated in

the 1st sound IF. The resulting AF signal has to be entered

into the mono audio input of the TDA9874A. A second

possibility is to use the internal AM demodulator stage

(with 6.5 MHz intercarrier), which gives limited

performance.

• Monitor selection for FM/AM demodulator outputs and

FM and NICAM signals with peak option

• Automatic FM dematrixing option

• Digital crossbar switch

• I²S-bus serial audio output with matrix, level adjustment

and mute

Korea has a stereo sound system similar to Europe and is

supported by the TDA9874A. The differences include

deviation, modulation contents and identification. It is

based on M standard.

• Dual audio Digital-to-Analog Converter (DAC) from

digital crossbar switch to analog crossbar switch,

bandwidth = 15 kHz

For all FM standards a high deviation mode for a single

carrier monaural sound demodulation is selectable.

• Automatic Volume Level (AVL) control

• Analog crossbar switch with inputs for mono and stereo

• Output selection of mono, stereo, dual, dual A or dual B

• Additional mono output with automatic select

• 20 kHz bandwidth for analog path

An overview of the supported standards and sound

systems and their key parameters is given in

Tables 1 to 3.

The analog multi-channel systems are sometimes also

called 2CS (2-carrier systems).

• Standby mode

• Automatic output selection for TV applications.

1999 Dec 03

1 234 5 6 7...68

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