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An EVM is now available to evaluate the performance of the TLC320AD50 analog interface circuit (AIC).

The ’AD50 is a versatile 16-bit sigma-delta analog front end for modem and business audio applications. It provides high-resolution signal conversion using an oversampling sigma-delta technique. The ’AD50 has internal 64 X oversampling on the ADC and 256 X oversampling on the DAC. The TLC320AD50 has a glueless interface, via a serial port, to the TMS320 family of digital signal processors (DSPs) reducing overall system cost and board space.

This EVM can be directly connected to the TMS320C54x DSKplus DSP Starter Kit or to any other system with a compatible synchronous serial interface. The kit comes complete with a data manual and applications report which describes the evaluation board and how to use it to demonstrate the performance of the ’AD50. The application report also describes the connections of the EVM to the DSKplus.

The ’AD50 AIC includes master/slave capability with support for up to three slaves, allowing this device to be used in multiple AIC applications such as voice-enabled modems. It also provides differential outputs that can drive a 600 differential load.

The ’AD50 offers excellent noise performance with typical signal-to-distortion ratio of 90 dB and typical signal-to-noise ratio of 89 dB on the ADC and DAC. With a 3-V digital interface, power-down mode, and low power dissipation of only 120 mW typical this device is ideal for battery-operated equipment and interfacing to 3-V DSPs.

Additional features of the ’AD50 include: selectable conversion rate, reset, power down, communications protocol, serial clock rate, gain control, and system test mode (digital and analog loopback test mode).

Key applications of this device include V.34+ modems, PCMCIA fax modems, DSP analog interface, industrial process control, acoustical signal processing, noise cancellation/suppression, and general-purpose data conversion.