1997-11-10 ,

Philips Semiconductors announces the release of two high-speed 12-bit analog-to-digital converters, the TDA8767 and TDA8768, with the TDA8768 being the first 12-bit converter to offer a sampling rate of 55 MHz. These are Philips Semiconductors' first 12-bit ADCs, delivering the increased conversion performance demanded by many high-end applications in both consumer and professional markets. The TDA8768 can be used in combination with the TDA9901, an optimised amplifier which operates with weak or variable input signals to ensure reliable operation, while remaining one of the most cost-effective solutions currently available.

"Philips Semiconductors 12-bit A-to-D converters offer excellent performance in terms of noise, signal-to-noise ratio, total harmonic distortion and ENOB (Effective Number Of Bits)," said Raja Yazigi, international product marketing manager in Caen, France, where the products are made. "When cost is taken into account, the price/performance of TDA8767 and TDA8768 ranks among the best in the world. Above 40 MHz sampling, Philips Semiconductors is on its own in terms of price when compared to competitive devices with similar performance."

Optimised for telecommunications applications (such as basestations) and professional imaging systems (such as medical ultra-sound scanners), the TDA8768 is the first in a new family of 55 MHz ADCs with low power consumption. Essentially a higher performance version of the TDA8767, it is also available in versions with a sampling rate of 40 MHz. It is priced at NLG 40.8 for the 55 MHz version and NLG 26.52 for the 40 MHz version for quantities up to 50,000 pieces. Engineering samples of a 10-bit version of this ADC, the TDA8765, are also available. Future members in the family will feature 14-bit conversion and enhanced linearity.

For applications where the input signal is weak or variable, the TDA8768 has been designed to work in conjunction with TDA9901, Philips SemiconductorsÌ latest wideband differential digitally controlled variable gain amplifier. This chip is optimised for fast switching between different gain settings, which means it can deliver steady signals to the ADC- of particular benefit where accuracy and reliability are important (such as medical systems and telecommunications applications).

The TDA8767 is available in three versions with 10 MHz, 20 MHz and 30 MHz sampling frequencies. An integrated bipolar IC, it offers differential or single analog input, enhancing its noise reduction capability and delivering improved resolution with a differential non-linearity of ±0.6 LSB and no missing codes. A wide variety of applications includes video digitizing, High Definition TV (HDTV), the PC market, imaging systems, telecommunications and various industrial applications. The 10, 20 and 30 MHz versions are priced at NLG 15.6, NLG 20.2 and NLG 26.92 respectively for quantities up to 50,000.

Philips Semiconductors, a division of Philips Electronics NV, headquartered in Eindhoven, The Netherlands, is the ninth largest semiconductor supplier in the world and the third largest supplier of discretes in the world. Philips Semiconductors' innovations in digital audio, video, and mobile technology position the company as a leader in the consumer, multimedia and wireless communications markets. Sales offices are located in all major markets around the world and are supported by systems labs.