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TI DAC with -100dB total harmonic distortion

Posted: 22 Apr 2004 ?? ?Print Version ?Bookmark and Share

Keywords:texas instruments? ti? digital-to-analog converter? dac? burr-brown pro audio?

Texas Instruments Inc. (TI) has introduced a four-channel, 24-bit audio DAC from its Burr-Brown Pro Audio product line which features 118dB dynamic range, -100dB total harmonic distortion and up to 200kHz sampling.

Designed for professional audio applications such as digital mixing consoles, digital effects processors, multitrack 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. According to TI, this architecture yields lower output of band noise and a high tolerance to system clock phase jitter.

The product provides differential voltage outputs (6.15Vpp) for each channel and are suitable to high-performance audio applications. The differential outputs are also easily converted to a single-ended output using an external operational amplifier IC.

"The PCM4104 is the industry's highest performance four-channel audio DAC. There is no other audio DAC on the market that offers this level of integration and performance," said Mike Centorino, marketing manager for TI's Burr-Brown Pro Audio products. "It also features low-power operation with 200mW total power consumption for all four channels, while competitive audio DACs consume the same power for only two channels."

Two configuration modes

The PCM4104 includes a flexible audio serial port interface, which 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 product 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 utilizes a serial peripheral interface (SPI) port for accessing the complete feature set via internal control registers.

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