GENERAL DESCRIPTION

The TDA1373H is a General Digital Input (GDIN) device for audio signals which is able to perform a high-quality sample rate conversion of digital audio signals (SRC mode). The device reads several serial input formats and signals in the IEC 958 digital audio format (also known as AES/EBU or SPDIF signals). For this purpose a full Audio Digital Input Circuit (ADIC) is present in the device.

FEATURES

• Four operating modes:

– Sample Rate Conversion (SRC) mode

– AD/DA mode

– SLAVE-VCO mode

– SLAVE-VCXO mode

• Full digital sample rate conversion over a wide range of input sample rates

• Fast and automatic detection and locking to the input sample rate with continuous tracking

• Digital Phase-Locked Loop (PLL) with adaptive bandwidth which removes jitter on the digital audio input

• Audio outputs (soft) muted during loop acquisition

• Full linear phase processing based on all-FIR filtering

• Integrated full digital IEC 958 demodulator for digital input signals (AES/EBU or SPDIF format) with intelligent error handling

• Extended input sample frequency range

• IEC 958 Channel Status (CS) and User Channel (UC) outputs

• On-chip CS and/or UC demodulation and buffering (consumer and professional format)

• Dedicated subcode processing for Compact Disc (CD)

• Final output quantization to 16, 18 or 20 bits with optional in-audio-band noise shaping

• Bitstream input and output for coupling with 1-bit analog-to-digital conversion (ADC) and digital-to-analog conversion (DAC)

• I2S and Japanese serial input formats supported for SRC and DAC functions

• I2S and Japanese serial output formats supported for SRC and ADC functions

• I2S and Japanese 4× oversampled serial output available for SRC and ADC functions

• 8-bit digital gain/attenuation control

• Switchable Digital Signal Processor (DSP)-interface (I2S input and output) for additional audio processing

• Additional clock outputs available at 768, 384, 256 and 128fso

• 3-line serial microcontroller interface, compatible with the Philips CD I.C. protocol (HCL)

• 5 V power supply

• 0.7 µm double metal Complementary Metal Oxide Semiconductor (CMOS)

• SRC THD + N:

– −113 dB over the 0 to 20 kHz band (1 kHz, 20 bits input and output) (see Fig.3)

– −95 dB over the 0 to 20 kHz band (1 kHz, 16 bits input and output)

• Pass band ripple smaller than ±0.004 dB for up-sampling and down-sampling filters

• Stop band suppression:

– selectable between 70 dB and 50 dB for 64× up-sampling filters

– 80 dB for 128× down-sampling filters

• Microcontroller operated and stand-alone mode.

APPLICATIONS

• Professional audio equipment for:

– mixing

– recording

– editing

– broadcasting

• CD-Recordable (CD-R)

• Digital Speaker Systems (DSS)

• Digital Compact Cassette recorders (DCC)

• Digital Audio Tape (DAT) and MD recorders

• Digital amplifiers

• Jitter killers.