Fastest ADC in the world

A new superfast ADC will enable next-generation cable modem services, 3G radio transceivers, point-to-point radios, and medical imaging systems.

Analog Devices has announced what it claims is the fastest 12-bit analog-to-digital converter (ADC) in the market, capable of encoding at 210 MSPS (megasamples per second). The AD9430 is 68% faster than the next fastest available converter, Analog Devices’ own AD9433.

The AD9430 is a 12-bit monolithic sampling ADC with an on-chip track-and-hold circuit. The device has a SNR (signal to noise ratio) performance of 64 dB up to 65 MHz at 210 MSPS and SFDR (spurious free dynamic range) of 80 dBc up to 65 MHz at 210 MSPS.

INL (integral nonlinearity) is typically +/- 1.5 LSB (least significant bit) and DNL (differential nonlinearity) is +/- 1 LSB. Power dissipation of the AD9430 is typically just 1.3 W at 210 MSPS.

In the AD9430, there is the option to select an output data format of twos complement or offset binary. In addition, the user can select between CMOS or LVDS compatible outputs. In CMOS mode, two output buses support demultiplexed data up to 110 MSPS rates at 3.3V.

When using low voltage differential signalling (LVDS), output drive can be scaled by means of an external resistor to minimise power consumption. A data sync input is provided for proper output data port alignment and a data clock output is available for proper output data timing.

Two versions of the AD9430 are available now, each offered in a 100-pin Thin Quad Flat Pack package with exposed heat sink paddle (epad TQFP).

The AD9430BSV-170, with 170 MSPS, is available in production quantities today and priced at $75 per unit in 1,000-piece quantities. The AD9430BSV-210, with 210 MSPS speed, is currently sampling and is priced at $91 per unit in 1,000-piece quantities.

Production quantities will be available in the autumn.

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