參數(shù)資料
型號(hào)： TDA9870A
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 消費(fèi)家電
英文描述： Digital TV Sound Processor DTVSP
中文描述： SPECIALTY CONSUMER CIRCUIT, PDIP64
封裝： SHRINK, PLASTIC, DIP
文件頁(yè)數(shù)： 3/88頁(yè)
文件大?。?/td> 362K
代理商： TDA9870A
1998 Aug 10
3
Philips Semiconductors
Product specification
Digital TV Sound Processor (DTVSP)
TDA9870A
1
FEATURES
1.1
Demodulator and decoder section
Sound IF (SIF) input switch e.g. to select between
terrestrial TV SIF and SAT SIF sources
SIF AGC with 24 dB control range
SIF 8-bit Analog-to-Digital Converter (ADC)
Two-carrier multistandard FM demodulation (B/G, D/K
and M standard)
Decoding for three analog multi-channel systems (A2,
A2+ and A2*) and satellite sound
Programmable identification (B/G, D/K and M standard)
and different identification times.
1.2
DSP section
Digital crossbar switch for all digital signal sources and
destinations
Control of volume, balance, contour, bass, treble,
pseudo stereo, spatial, bass boost and soft-mute
Plop-free volume control
Automatic Volume Level (AVL) control
Adaptive de-emphasis for satellite
Programmable beeper
Monitor selection for FM/AM DC values and signals,
with peak detection option
I
2
S-bus interface for a feature extension (e.g. Dolby
surround) with matrix, level adjust and mute.
1.3
Analog audio section
Analog crossbar switch with inputs for mono and stereo
(also applicable as SCART 3 input), SCART 1
input/output, SCART 2 input/output and line output
User defined full-level/
3 dB scaling for SCART outputs
Output selection of mono, stereo, dual A/B, dual A or
dual B
20 kHz bandwidth for SCART-to-SCART copies
Standby mode with functionality for SCART copies
Dual audio Digital-to-Analog Converter (DAC) from DSP
to analog crossbar switch, bandwidth of 15 kHz
Dual audio ADC from analog inputs to DSP
Two dual audio DACs for loudspeaker (Main) and
headphone (Auxiliary) outputs; also applicable for
L, R, C and S in the Dolby Pro Logic mode with feature
extension.
2
GENERAL DESCRIPTION
The TDA9870A is a single-chip Digital TV Sound
Processor (DTVSP) for analog multi-channel sound
systems in TV sets and satellite receivers.
2.1
Supported standards
The multistandard/multi-stereo capability of the
TDA9870A is mainly of interest in Europe, but also in Hong
Kong/Peoples Republic of China and South East Asia.
This includes B/G, D/K, I, M and L standard. In other
application areas there exists only subsets of those
standard combinations otherwise only single standards
are transmitted.
M standard is transmitted in Europe by the American
Forces Network (AFN) with European channel spacing
(7 MHz VHF, 8 MHz UHF) and monaural sound.
Korea has a stereo sound system similar to Europe and is
supported by the TDA9870A. Differences include
deviation, modulation contents and identification. It is
based on M standard.
An overview of the supported standards and sound
systems and their key parameters is given in Table 1.
The analog multi-channel sound systems (A2, A2+ and
A2*) are sometimes also named 2CS (2-Carrier Systems).
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