ADC is attractive for undersampling

Edited by the Electronicstalk editorial team Apr 18, 2005

The LTC2220-1 is a 12bit 185Msample/s ADC claimed to achieve excellent AC performance with low power consumption.

Linear Technology has introduced the LTC2220-1, a 12bit 185Msample/s ADC that achieves excellent AC performance with low power consumption.

In a 9 x 9mm QFN package and using just 910mW, the LTC2220-1 achieves over 67.5dB SNR and 80dB SFDR up to 140MHz input.

It features a 775MHz full power bandwidth making it attractive for undersampling.

These benefits combine to make the LTC2220-1 ideal for communications applications such as digital predistortion power amplifier linearisation and microwave links between cellular basestation transceivers.

In addition to the excellent AC performance of the ADC, the logic interface can be optimised for low noise as well.

The digital outputs can be either differential LVDS for low EMI, or single-ended CMOS.

A separate digital output power supply allows the CMOS output swing to range from 0.5 to 3.3V matching low voltage DSPs and minimising switching noise.

The LTC2220-1 is pin-compatible with the lower power LTC2220 (12bit 170Msample/s), LTC2221 (12bit 135Msample/s), LTC2230 (10bit 170Msample/s) and LTC2231 (10bit 135Msample/s).

These parts are part of a much larger family that features industry-leading AC performance over a broad range of sample rates, low power and pin-compatibility, allowing easy migration from 10 to 14bit, or to different sample rates.

Available from stock and specified over the commercial and industrial temperature ranges, the LTC2220-1 is available in the 64-pin 9 x 9mm QFN package.

Pricing begins at $49.00 each for 1000-piece quantities.