tda9898hn/v2 NXP Semiconductors, tda9898hn/v2 Datasheet - Page 17
tda9898hn/v2
Manufacturer Part Number
tda9898hn/v2
Description
Tda9897; Tda9898 Multistandard Hybrid If Processing
Manufacturer
NXP Semiconductors
Datasheet
1.TDA9898HNV2.pdf
(103 pages)
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NXP Semiconductors
TDA9897_TDA9898_3
Product data sheet
8.7.1 Narrow-band FM PLL demodulation
8.7.2 AM sound demodulation
8.7 Mono sound demodulator
8.8 Audio amplifier
8.9 Synthesizer
External BP filter (e.g. for 4.5 MHz) for additional filtering, optional.
Bypass mode selection for use of external filter.
Integrated SIF BP tracking filter for chroma suppression.
Integrated tracking filters for LIF and ZIF.
Symmetrical output stages for DIF, ZIF and 2nd SIF.
Second narrow-band gain control loop for 2nd SIF via FM PLL.
Additional external input for either TV or radio intercarrier signal.
FM carrier selection independent from VIF trap, because VIF trap uses reference via
synthesizer.
FM wide and ultra wide mode with adapted loop bandwidth and different selectable
FM acquisition window widths to cope with FM overmodulation conditions.
Passive AM sound detector.
L and L-accent standard without SAW switching (done by sideband selection of SIF
converter).
Different gain settings for FM sound to adapt to different FM deviation.
Switchable de-emphasis for FM sound.
Automatic mute function when FM PLL is unlocked.
Forced mute function.
Output amplifier for AM sound.
In DIF mode, the synthesizer supports low and zero IF input frequencies for 34.5 MHz,
36 MHz, 44 MHz and 57 MHz center frequencies.
In radio mode, the synthesizer supports 2nd sound intercarrier conversion. A large set of
synthesizer frequencies in steps of 0.5 MHz enables flexible combination of filter and 2nd
IF frequencies.
Synthesizer loop internally adapted to divider ratio range for optimum phase noise
requirement (loop bandwidth).
Rev. 03 — 11 January 2008
TDA9897; TDA9898
Multistandard hybrid IF processing
© NXP B.V. 2008. All rights reserved.
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