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參數(shù)資料
| 型號： | TDA9875AH |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | Digital TV Sound Processor DTVSP |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | PLASTIC, QFP |
| 文件頁數(shù)： | 28/96頁 |
| 文件大?。?/td> | 296K |
| 代理商： | TDA9875AH |
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1999 Dec 20
28
Philips Semiconductors
Product specification
Digital TV Sound Processor (DTVSP)
TDA9875A
Notes
1.
Definitions of levels and level setting:
a) The full-scale level for analog audio signals is 1.4 V (RMS).
b) The nominal level at the digital crossbar switch is defined at
15 dB (full-scale).
c) Nominal audio input levels for external and mono: 500 mV (RMS) at
9 dB (full-scale).
d) See also Tables 7 and 8.
All analog and digital supply ground pins are connected internally.
Set demodulator to AM mode. Apply an AM carrier (with 1 kHz and 100%) to one channel. Check AGC step. Switch
AGC off and set AGC to the gain step found. Measure the 1 kHz signal level of this channel and take it as a reference.
Switch to the other SIF input to which no signal is connected and which is terminated with 50
. Now measure the
1 kHz crosstalk signal level. The SIF source resistance should be low (50
).
NICAM in accordance with “EBU specification” Audio performance is limited by the dynamic range of the NICAM728
system. Due to compansion, the quantization noise is never lower than
62 dB (unweighted RMS) with respect to
the input level.
FM source; in dual mode only A (respectively B) signal modulated; measured at B (respectively A) channel output;
V
o
= 1 V (RMS) of modulated channel.
FM source; in stereo mode only L (respectively R) signal modulated; measured at R (respectively L) channel output;
V
o
= 1 V (RMS) of modulated channel. The stereo channel separation may be limited by adjustment tolerances of
the transmitter.
If the supply voltage for the TDA9875A is switched off, because of the ESD protection circuitry, all audio input pins
are short-circuited. To avoid a short-circuit at the SCART inputs a 15 k
resistor (
3 dB divider) has to be used.
The SCART specification allows a signal level of up to 2 V (RMS). Because of signal handling limitations due to the
5 V supply voltage for the TDA9875A, there is a need for fixed 3 dB attenuators at the SCART inputs. To achieve
SCART-to-SCART copies with 0 dB gain, there are 3 dB/0 dB amplifiers at the outputs of SCART 1 and SCART 2
and at the line output. The attenuator is realized by an internal resistor that works together with an external series
resistor as a voltage divider. With this voltage divider the maximum SCART input signal level of 2 V (RMS) is scaled
down to 1.4 V (RMS) at the input pin. To avoid clipping, the 3 dB gain must not be used if the SCART input signal is
larger than 1.4 V (RMS).
ADC level adjust is 6 dB, all other level adjusts are 0 dB. If an external
3 dB divider is used set output buffer gain
to 3 dB, tone control to 0 dB, AVL off and volume control to 0 dB.
2.
3.
4.
5.
6.
7.
8.
9.
X
J
X
D
X
A
adjustment tolerance
drift
ageing
±
30
±
30
±
5
10
6
10
6
across temperature range
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
year
6
–
10
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|---|---|
| TDA9875 | Digital TV Sound Processor DTVSP |
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| TDZ10 | Low Current Operation at 250 ，Low Reverse Leakage,Low Noise Zener Diode |
| TDZ11 | Low Current Operation at 250 ，Low Reverse Leakage,Low Noise Zener Diode |
| TDZ12 | Low Current Operation at 250 ，Low Reverse Leakage,Low Noise Zener Diode |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA9875AH/V2,557 | 功能描述:IC SOUND PROC DGTL TV 64QFP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻處理 系列:- 其它有關(guān)文件:STA321 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:Sound Terminal™ 類型:音頻處理器 應(yīng)用:數(shù)字音頻 安裝類型:表面貼裝 封裝/外殼:64-LQFP 裸露焊盤 供應(yīng)商設(shè)備封裝:64-LQFP EP（10x10） 包裝:Digi-Reel® 其它名稱:497-11050-6 |
| TDA9880 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Alignment-free multistandard vision and FM sound IF-PLL demodulator |
| TDA9880T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Alignment-free multistandard vision and FM sound IF-PLL demodulator |
| TDA9881 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Alignment-free vision and FM sound IF PLL demodulator for negative modulated TV standards |
| TDA9881HN | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Alignment-free vision and FM sound IF PLL demodulator for negative modulated TV standards |
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