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LTC raises sampling rate of 12-bit A/D converter

Milpitas, Calif. — Today Linear Technology Corp. introduced the LTC2220-1, a 12-bit, 185 megasamples/sec (Msamples/s) analog-to-digital converter (A/D converter), that combines solid AC performance with low power for power amplifier (PA) linearization.

In a 9mm x 9mm QFN package and using just 910 mW, the LTC2220-1 achieves over 67.5dB signal-to-noise ratio (SNR) and 80dB spurious-free dynamic range (SFDR) up to 140 MHz input. It features a 775 MHz full power bandwidth making it attractive for undersampling. These benefits combine to make the LTC2220-1 practical for communications applications such as digital predistortion power amplifier linearization and microwave links between cellular base station transceivers.

In addition to strong AC performance, the logic interface can be optimized for low noise as well. The digital outputs can be either differential low-voltage differential signaling (LVDS) for low electromagnetic interference (EMI), or single-ended CMOS. A separate digital output power supply allows the CMOS output swing to range from 0.5 V to 3.3 V matching low voltage DSPs and minimizing switching noise.

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

Available from stock and specified over the commercial and industrial temperature ranges, the LTC2220-1 is available in the 64-pin 9mm x 9mm QFN package. Pricing begins at $49.00 each for 1,000-piece quantities.

Click here for the LTC2220-1 data sheet.

For more information, please call 1-800-4-LINEAR or visit: www.linear.com

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