TFA9879HN数据手册恩XP中文资料规格书

描述 Description

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.
The TFA9879 is available in a HVQFN24 package.

特性 Features

3.1 General features
• Closed loop amplifier for:
• 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 addresses for multi-channel applications
• 1.8 V / 3.3 V tolerant digital inputs
• Only three external components required
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
Interface format support for digital audio inputs
• I²S formats (fs = 8 kHz to 96 kHz):
• Philips standard I²S
• Japanese I²S MSB-justified
• Sony I²S LSB-justified
• PCM / IOM2 formats (fs = 8 kHz or fs = 16 kHz):
• Long frame sync
• Short frame sync

应用 Application

Mobile phones

Portable Navigation Devices (PND)

PDAs

Notebooks

Portable gaming devices

MP3 and MP4 players