Texas Instruments Incorporated (TI) has introduced two 24-bit, 216-kHz analog-to-digital converters (ADCs) to complete the company's high-performance audio signal chain for professional digital audio recording and processing applications. The new dual-channel devices combine high integration with the highest dynamic range in the industry of up to 124-dB signal-to-noise ratio (SNR) while still reducing power consumption by 50 percent compared to competing products.
The PCM4220 and PCM4222 integrate an on-chip, linear phase decimation filtering engine that supports both classic and low group delay filter responses, allowing designers to optimize the device for either studio or live sound applications. The PCM4222 enables designers to achieve system flexibility through a 6-bit modulator output that bypasses the digital decimation filter. This option provides versatility to create a digital filter in an FPGA, further customizing the performance for end-product differentiation. Both devices simplify board layout and system partitioning with a time division multiplex function that allows OEMs to daisy chain up to four devices into a single serial port on a DSP or FPGA.
The new devices consume only 305 mW of power at 48 kHz, ultimately easing power supply design and enabling the option to power computer audio interfaces entirely through USB or Firewire bus.
Texas Instruments
