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参数资料
| 型号： | TDA9897HN/V2 |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC48 |
| 封装： | 7 X 7 MM, 0.85 MM HEIGHT, PLASTIC, SOT619-1, MO-220, HVQFN-48 |
| 文件页数： | 11/103页 |
| 文件大小： | 511K |
| 代理商： | TDA9897HN/V2 |
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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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA9897S1 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Multistandard hybrid IF processing |
| TDA9897V2 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Multistandard hybrid IF processing |
| TDA9898 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Multistandard hybrid IF processing |
| TDA9898HL | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Multistandard hybrid IF processing |
| TDA9898HL/V2/S1,11 | 功能描述:上下转换器 MULTI APPL SYS RoHS:否 制造商:Texas Instruments 产品:Down Converters 射频:52 MHz to 78 MHz 中频:300 MHz LO频率: 功率增益: P1dB: 工作电源电压:1.8 V, 3.3 V 工作电源电流:120 mA 最大功率耗散:1 W 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-128 |
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