TDA9898HN/V2,551 NXP Semiconductors, TDA9898HN/V2,551 Datasheet - Page 15

• Manufacturer Part Number: TDA9898HN/V2,551
• Description: IC IF PROCESSOR MULTISTD 48HVQFN
• Manufacturer: NXP Semiconductors

Specifications of TDA9898HN/V2,551

• Function: IF Processor
• Rf Type: ATV, DVB, FM
• Package / Case: 48-VFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935283079551; TDA9898HN/V2-S; TDA9898HN/V2-S

NXP Semiconductors
8. Functional description
TDA9897_TDA9898_4
Product data sheet
8.3.1 Mode selection of VIF AGC
8.3.2 VIF AGC monitor
8.1 IF input switch
8.2 VIF demodulator
8.3 VIF AGC and tuner AGC
Different signal bandwidth can be handled by using two signal processing chains with
individual gain control.
Switch configuration allows independent selection of filter 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.
ATV demodulation using 6 MHz DVB window (band-pass) filter (for 6 MHz, 7 MHz or
8 MHz channel width).
IF frequencies adapted to enable the use of different filter configurations. 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 filter 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.
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.
VIF AGC DC voltage monitor output (with expanded internal characteristic).
VIF AGC read out via I
(TOP setting either via I
2
C-bus (for IF level indication) with zero-calibration via TOP setting
Rev. 04 — 25 May 2009
2
C-bus or via TOP potentiometer).
TDA9897; TDA9898
Multistandard hybrid IF processing
© NXP B.V. 2009. All rights reserved.
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