The TFA9879 contains a processor that supports a range of sound processing features including a 5-band parametric equalizer, separate bass and treble control, a dynamic range compressor, soft clip control and volume control. Excellent audio performance combined with high Power Supply Rejection Ratio (PSRR) is achieved through the use of a closed loop configuration.
Two independent digital audio inputs (I2S-bus / PCM / IOM2) are available for connecting both a baseband and a multimedia processor.
- High power supply rejection ratio - Excellent audio performance - Digital input for high RF immunity - High efficiency for maximizing battery life - Wide supply voltage range (fully operational from 2.5 V to 5.5 V) - Delivers high output power into 4 Ω and 8 Ω load impedances - Phase-Locked Loop (PLL); no system clock required - Protection including diagnostics via I2C-bus: - OverCurrent Protection (OCP) to protect against short circuits across the speaker, to the supply line or to ground - OverTemperature Protection (OTP) - Digital inputs protected with UnderFrequency Protection (UFP), OverFrequency Protection (OFP) and Invalid - Bit-clock Protection (IBP) - ‘Pop noise’ free at power-up/power down, during sample rate switching and when switching between digital inputs - Four separate I2C-bus addresses for multi-channel applications - 1.8 V / 3.3 V tolerant digital inputs - Only three external components required 3.2 Programmable Digital Sound Processor (DSP) - Digital volume control (−70 dB to +24 dB) - Digital parametric 5-band equalizer - Bass and treble control (−18 dB to +18 dB) - Dynamic range compressor: - Programmable attack and release levels - Programmable attack and release rates - Soft and hard mute control - Programmable DC blocking via high-pass filter - Power limiter (0 dB to −124 dB in 0.5 dB steps) - Zero crossing volume control - Stereo-to-mono down-mix function 3.3 - Interface format support for digital audio inputs - I 2S formats (fs = 8 kHz to 96 kHz): - Philips standard I2S-bus - Japanese I2S-bus MSB-justified - Sony I2S-bus LSB-justified - PCM / IOM2 formats (fs = 8 kHz or fs = 16 kHz): - Long frame sync - Short frame sync
- Mobile phones - Portable Navigation Devices (PND) - PDAs - Notebooks - Portable gaming devices - MP3 and MP4 players
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