Four channel audio DAC

Texas Instruments has introduced a four-channel, 24-bit audio digital-to-analog converter from its Burr-Brown Pro Audio product line.

Texas Instruments has introduced a four-channel, 24-bit audio digital-to-analog converter (DAC) from its Burr-Brown Pro Audio product line.

The new device features 118dB dynamic range, -100dB total harmonic distortion and up to 200kHz sampling. Dubbed the PCM4104, it has been designed for professional audio applications, such as digital mixing consoles, digital effects processors, multi-track recorders, broadcast studio equipment, surround sound processors and high-end A/V receivers. The PCM4104 employs delta-sigma technology with a high-performance, multi-level modulator and a switched capacitor output filter. This architecture yields lower out of band noise and a high tolerance to system clock phase jitter.

Differential voltage outputs (6.15Vp-p) are provided for each channel and are suited to high-performance audio applications. The differential outputs are easily converted to a single-ended output using an external operational amplifier IC.

The PCM4104 includes an audio serial port interface that supports standard and time division multiplexed (TDM) data formats. Support for TDM formats simplifies interfacing to an audio DSP, such as TI’s C6713 Pro Audio DSP, while supporting a cascade connection of several PCM4104 devices.

The device offers two configuration modes: standalone and software controlled. Standalone mode provides dedicated control pins for configuring a subset of the available functions, while software mode uses a serial peripheral interface (SPI) port for accessing the complete feature set via internal control registers.

It operates from a +5V analog power supply and a +3.3V digital power supply. The digital I/O is compatible with +3.3V logic families.

Packaged in a 48-lead TQFP, the device is available now from TI and its authorised distributors. An evaluation module (EVM) is also available.

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