OFDM Demodulator ICs

TC90514IXBG: OFDM Demodulation and Error Correction IC for ISDB-T Digital Terrestrial Diversity TV Reception

The TC90514IXBG complies with ISDB-T, a Japanese standard for digital terrestrial television. It performs OFDM demodulation with antenna diversity, which is ideal for mobile receivers, as well as error correction. Up to four-branch maximal-ratio combining (MRC) diversity and adaptive equalization enable stable reception at high speeds.
The TC90514IXBG incorporates a dedicated OFDM demodulator and an error correction circuit that comply with narrow-bandwidth ISDB-T. This allows for either one-segment broadcast reception or channel search, independently of four-branch diversity reception.
The TC90514IXBG supports demodulation for Earthquake Early Warning information using the Auxiliary Channel (AC) carrier. The demodulated information can be shifted out via the I²C bus.

Features

Up to four-branch maximal-ratio combining (MRC) diversity
Input signal: Low intermediate-frequency (IF) signal with a center frequency of 3 to 5 MHz or a direct IF signal (57 MHz)
Output signal: MPEG-2 TS stream
Package: P-FBGA177-1111-0.65
Operating ambient temperature: -40 to +85℃
Supply voltages: 1.2 V, 3.3 V (I/O)
Process: 65 nm

This is the block diagram of the TC90514IXBG: OFDM Demodulation and Error Correction IC for ISDB-T Digital Terrestrial Diversity TV Reception.

Functions	4+1 Antenna Diversity Receiver TC90514IXBG
Four-branch diversity reception	Supported
Independent one-segment ISDB-T demodulation (Simultaneous full- and one-segment TV reception)	13-segment: Four-branch diversity 1-segment: Non-diversity
Background channel search	TV reception: Four-branch diversity Channel search: Non-diversity (one-segment)
Simultaneous reception of a data broadcast program	Data reception: Four-branch diversity TV reception: Non-diversity (one-segment)
Earthquake Early Warning using the AC carrier	Demodulated data can be shifted out via an I²C bus
Speed limit for mobile reception	More than two-times improvement over the predecessor, TC90504IXBG, thanks to intercarrier interference suppression for fast fading environments

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