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.