Product category: Analogue and Mixed Signal ICs
News Release from: Texas Instruments (April 2001-March 2006) | Subject: PCM290x series
Edited by the Electronicstalk Editorial Team on 8 March 2002
Codecs put USB onboard to
add value and save space
Texas Instruments has developed a novel family of stereo audio codecs with built-in USB controllers and internal S/PDIF-compatible I/O terminals
'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, TI Digital Audio. 'The series can be applied to a wide range of digital consumer appliances, which will help us serve our customers more effectively'.
This article was originally published on Electronicstalk on 8 March 2002 at 8.00am (UK)
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The PCM290x family includes four products with two different power supply formats, the USB bus-powered PCM2900 and PCM2902 with an operating voltage of 2.7-3.6V, and the self-powered PCM2901 and PCM2903 with an operating voltage of 5V.
With a 16bit resolution and maximum sample rate of 48kHz, the PCM290x family has a typical dynamic range of 89dB for A/D convertors and 93dB for D/A convertors with typically 0.005% THD+N in self-powered products.
In addition, the PCM290x series contains built-in protection against unauthorised copying (SCMS), is full duplex compatible with a 12MHz on-chip clock generator and features HID (human interface device), volume and mute control.
The series also contains a suspend flag feature that saves power in target applications, notifying external circuits to the condition of the PC suspending.
The PCM290x series has consolidated the USB device disk repeater function, normally controlled by a microcomputer, onto a single chip, making it possible to reduce the board surface area by 50%.
Furthermore, the product is controlled by the USB drivers included in the OS software, eliminating the need for specialised drivers and making product development more efficient.
The product series also uses TI's Sampling Period Adaptive Controlled Tracking System (SpAct), which enables the splitting of a single clock source using a PLL circuit.
In addition, the series is compatible with multiple sampling rates and suppresses jitter to extremely low levels.
The PCM290x family is available now from TI and its authorised distributors.
The devices are each packaged in a 28-pin SSOP.
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