參數(shù)資料
型號(hào)： TDA9898HL/V2/S1
廠商： NXP SEMICONDUCTORS
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝： 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, SOT313-2, MS-026, LQFP-48
文件頁(yè)數(shù)： 62/103頁(yè)
文件大小： 511K
代理商： TDA9898HL/V2/S1
TDA9897_TDA9898_3
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 03 — 11 January 2008
61 of 103
NXP Semiconductors
TDA9897; TDA9898
Multistandard hybrid IF processing
[16] To match the AFC output signal to different tuning systems a current output is provided. The test circuit is given in Figure 19. The
AFC steepness can be changed by resistors R1 and R2.
[17] The AFC value of the VIF and RIF frequency is generated by using digital counting methods. The used counter resolution is provided
with an uncertainty of
±1 bit corresponding to ±25 kHz. This uncertainty of ±25 kHz has to be added to the frequency accuracy
parameter.
[18] Measured with an FM deviation of 25 kHz and the typical AF output voltage of 500 mV (RMS). The audio signal processing stage
provides headroom of 6 dB with THD < 1.5 %. The I2C-bus bits W3[0] and W3[1] control the AF output signal amplitude from
0dBto
18 dB in steps of 6 dB. Reducing the audio gain for handling a frequency deviation of more than 55 kHz avoids AF output
signal clipping.
[19] Amplitude response depends on dimensioning of FM PLL loop lter.
[20] The lower AF cut-off frequency depends on the value of the capacitor at pin CAF1. A value of CAF1 = 470 nF leads to f3dB(AF)l ≈ 20 Hz
and CAF1 = 220 nF leads to f3dB(AF)l ≈ 40 Hz.
[21] For all signal-to-noise measurements the used VIF modulator has to meet the following specications:
a) Incidental phase modulation for black-to-white jump less than 0.5 degrees.
b) QSS AF performance, measured with the television demodulator AMF2 (audio output, weighted signal-to-noise ratio) better than
60 dB (at deviation 27 kHz) for 6 kHz sine wave black-to-white video modulation.
c) Picture-to-sound carrier ratio PC / SC1 = 13 dB (transmitter).
[22] The PC / SC ratio is calculated as the addition of TV transmitter PC / SC1 ratio and SAW lter PC / SC1 ratio. This PC / SC ratio is
necessary to achieve the weighted signal-to-noise values as noted. A different PC / SC ratio will change these values.
[23] Measurement condition is SC1 / SC2
≥ 7dB.
[24] The differential QSS signal output on pins OUT1A and OUT1B is analyzed by a test demodulator TDA9820. The signal-to-noise ratio of
this device is better than 60 dB. The measurement is related to an FM deviation of
±27 kHz and in accordance with “ITU-R BS.468-4”.
[25] The tolerance of the reference frequency determines the accuracy of VIF AFC, RIF AFC, FM demodulator center frequency, maximum
FM deviation, sound trap frequency, LIF band-pass cut-off frequency and ZIF low-pass cut-off frequency as well as the accuracy of the
synthesizer.
[26] The value of Cpull determines the accuracy of the resonance frequency of the crystal. It depends on the used type of crystal.
[27] The AC characteristics are in accordance with the I2C-bus specication for fast mode (maximum clock frequency is 400 kHz).
Information about the I2C-bus can be found in the brochure
“The I2C-bus and how to use it” (order number 9398 393 40011).
[28] The SDA and SCL lines will not be pulled down if VP is switched off.
[29] The threshold is dependent on VP.
[30] The threshold is independent of VP.
Table 54.
Examples to the FM PLL lter
BLF(3dB) (kHz)
Cs (nF)
Cpar (pF)
Rs (k)
Comment
210
2.2
100
8.2
recommended for single-carrier-sound,
FM narrow
410
2.2
47
5.6
recommended for single-carrier-sound, FM wide
130
2.2
470
5.6
recommended for two-carrier-sound, FM narrow
210
2.2
47
8.2
used for test circuit
Table 55.
Input frequencies and carrier ratios (examples)
Symbol
Parameter
B/G standard
M/N standard L standard L-accent standard
Unit
fPC
picture carrier frequency
38.375
33.625
MHz
fSC1
sound carrier frequency 1
32.825
33.825
31.825
40.125
MHz
fSC2
sound carrier frequency 2
32.583
-
MHz
PC / SC1 picture to rst sound carrier ratio
13
7
10
dB
PC / SC2 picture to second sound carrier ratio
20
-
dB
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA9898HN 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard hybrid IF processing
TDA9898HN/V2,518 功能描述:上下轉(zhuǎn)換器 MULTI APPL SYS RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128
TDA9898HN/V2,551 功能描述:上下轉(zhuǎn)換器 MULTI APPL SYS RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128
TDA9898HN/V2-S 功能描述:上下轉(zhuǎn)換器 MULTI APPL SYS FOR TERRESTR IF RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128
TDA9898HN/V2-T 功能描述:上下轉(zhuǎn)換器 MULTI APPL SYS FOR TERRESTR IF RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128
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