Four-in-one 65 MSPS ADC family

19 November 2003 Analogue, Mixed Signal, LSI

Analog Devices has integrated four analog-to-digital converters (ADCs) onto one chip to meet the needs of high-density, space-constrained systems, such as medical imaging systems - which can require more than 100 converters per system - or space-constrained, multichannel applications, such as wireless communications basestations.

Using serial low-voltage differential-signalling (LVDS) data outputs, the single chip quad ADC solutions are compact, fast, cost competitive, and power-efficient, claims the manufacturer. And LVDS outputs reduce pin count, package size, number of board traces, and substrate noise.

The first members of the AD92x9 quad ADC family are the 12-bit 50-/65-MSPS AD9229, and the 8-bit 65-MSPS AD9289. Both parts are general-purpose converters for high-channel-density applications. Both the AD9229 and AD9289 quad ADCs feature best-in-class dynamic specifications with the highest signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR) of any converter within their resolution grades on the market, according to the company.

The AD9229 features 70-dB SNR, 85-dBc SFDR, ±0,3-LSB differential nonlinearity (DNL), and ±0,6-LSB integral nonlinearity (INL). Operating from a single 3,0 V power supply, the AD9229 consumes less than 220 mW per ADC core. The AD9289 specifies 47-dB SNR, 60-dBc SFDR, ±0,25-LSB DNL, and ±0,5-LSB INL. Operating from a single 3,0 V power supply, the AD9289 consumes less than 68 mW per ADC core.

Both parts deliver the same outstanding dynamic performance found in four single ADCs, says the company, while maintaining exceptional channel matching and excellent cross-talk isolation, with virtually no cross-talk over the full operating range.

For more information contact Analog Data Products, a division of Avnet Kopp, 011 809 6100.

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