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參數(shù)資料
| 型號(hào)： | TDA9897HN/V3 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC48 |
| 封裝： | 7 X 7 MM, 0.85 MM HEIGHT, PLASTIC, MS-026, SOT619-1, HVQFN-48 |
| 文件頁數(shù)： | 11/103頁 |
| 文件大小： | 529K |
| 代理商： | TDA9897HN/V3 |
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TDA9897_TDA9898_4
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 04 — 25 May 2009
15 of 103
NXP Semiconductors
TDA9897; TDA9898
Multistandard hybrid IF processing
8.
Functional description
8.1 IF input switch
Different signal bandwidth can be handled by using two signal processing chains with
individual gain control.
Switch conguration allows independent selection of lter for analog VIF and for analog
SIF (used at same time) or DIF.
The switch takes into account correct signal selection for TAGC in the event of VIF and
DIF signal processing.
8.2 VIF demodulator
ATV demodulation using 6 MHz DVB window (band-pass) lter (for 6 MHz, 7 MHz or
8 MHz channel width).
IF frequencies adapted to enable the use of different lter congurations. The Nyquist
processing is integrated. The integrated Nyquist processing provides also adjacent
channel suppression. Sideband switch supplies selection of lower or upper sideband (e.g.
for L-accent).
For optional use of standard Nyquist lter the integrated Nyquist processing can be
switched off.
Equalizer provides optimum pulse response at different standards [e.g. to cope with
higher demands for Liquid Crystal Display (LCD) TV].
Integrated sound traps.
Sound trap reference independent from received 2nd sound IF (reference taken from
integrated reference synthesizer).
IF level selection provides an optimum adaptation of the demodulator to high linearity or
low noise.
8.3 VIF AGC and tuner AGC
8.3.1 Mode selection of VIF AGC
Peak white AGC for positive modulation mode with adaptation for speed up and black level
AGC (using proven system from TDA9886).
For negative modulation mode equal response times for increasing or decreasing input
level (optimum for amplitude fading) or normal peak AGC or ultra fast peak AGC.
8.3.2 VIF AGC monitor
VIF AGC DC voltage monitor output (with expanded internal characteristic).
VIF AGC read out via I2C-bus (for IF level indication) with zero-calibration via TOP setting
(TOP setting either via I2C-bus or via TOP potentiometer).
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PDF描述 |
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| TDA9898HN/V2 | SPECIALTY CONSUMER CIRCUIT, PQCC48 |
| TDA9898HL/V2/S1 | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| TDA9897HL/V2/S1 | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| TDA9897HN/V2 | SPECIALTY CONSUMER CIRCUIT, PQCC48 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA9897S1 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard hybrid IF processing |
| TDA9897V2 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard hybrid IF processing |
| TDA9898 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard hybrid IF processing |
| TDA9898HL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard hybrid IF processing |
| TDA9898HL/V2/S1,11 | 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 |
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