TOKYO -- Taking aim at CD players, portable radios, and even "domestic-use robots," Texas Instruments Inc. here today announced the first stereo audio coder-decoder (codec) chip series with integrated USB controller and internal S/PDIF-compatible I/O terminal.
The new PCM290x codec IC family has been designed to address the consumer's need to download and edit digital audio material on PCs as well as transmit data to audio equipment, said Dallas-based TI. These applications include mini-stereo decks, portable CD/cassette radios, headphone/microphone combo units, and the domestic-use robots, according to TI.
"TI's PCM290x series adds more value to audio equipment by integrating USB functions while reducing size and cost by 50% compared with existing USB controllers with S/PDIF functionality," said Yuzo Sugiki, marketing manager of the TI Digital Audio business unit. "The series can be applied to a wide range of digital consumer appliances, which will help us serve our customers more effectively."
The PCM290x chips replace the need for a separate microcontroller to handle USB device disk repeater function, according to TI. In addition, products are controlled by the USB drivers included in the operating system software, which eliminates the need for specialized drivers.
The new series--which is part of TI's Burr-Brown portfolio of mixed-signal ICs--includes four products with two different power supply formats--the USB bus-powered PCM2900 and PCM2902 with an operating voltage of 2.7-3.6 volts, and the self-powered PCM2901 and PCM2903 with an operating voltage of 5 volts. The PCM290x chips have a 16-bit resolution and maximum sample rate of 48 KHz. The devices have a dynamic range of 89 dB (typical) for analog-to-digital converters and 93 dB for digital-to-analog converters with 0.005% THD+N (typical) in self-powered products, said TI.
The PCM290x family is available now with devices housed in 28-pin SSOP packages. In 1,000-unit quantities, the self-powered PCM2902 chip and the PCM2903 USB bus-powered device cost $4.25 each. These devices have S/PDIF-compatible I/O terminals. Devices without the I/O terminal are priced at $3.95 each in quantities of 1,000.