參數(shù)資料
型號(hào)： TDA9897HL/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
文件頁數(shù)： 11/103頁
文件大小： 511K
代理商： TDA9897HL/V2/S1
TDA9897_TDA9898_3
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 03 — 11 January 2008
15 of 103
NXP Semiconductors
TDA9897; TDA9898
Multistandard hybrid IF processing
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.
For optional use of standard Nyquist lter the integrated Nyquist processing can be
switched off.
Sideband switch supplies selection of lower or upper sideband (e.g. for L-accent).
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).
8.3.3 Tuner AGC
Independent integral tuner gain control loop (not nested with VIF AGC). Integral
characteristic provides high control accuracy.
Accurate setting of tuner control onset (TOP) for integral tuner gain control loop via
I2C-bus.
For L standard, TAGC remains VIF AGC nested, as from eld experience in the past this
narrow-band TAGC gives best performance.
相關(guān)PDF資料
PDF描述
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
TDA9897HN 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard hybrid IF processing
TDA9897HN/V3 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard hybrid IF processing
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
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