New 16-Bit ADC with 160 MSPS and 77 DB SNR

The LTC2209, a 16-bit 160 MSPS high performance high-speed ADC from Linear Technology Corporation was designed amongst others for leading edge communications equipment and instrumentation applications. The ADC has excellent signal to noise ratio (SNR) performance of 77.1 dB and spurious free dynamic range (SFDR) of 100 dB at baseband. The LTC2209 can accept high frequency, wide dynamic range signals, offering a wide analog input bandwidth of 700 MHz.

The LTC2209 extends the sampling frequency of the LTC2208 family, offering a pincompatible upgrade path for existing designs.

The LTC2209 features a programmable gain amplifier (PGA) front end that eases the ADC driver output power requirements when driving the lower input range of 1.5 VP-P. This improves the distortion performance and power consumption of the driver with minimal impact on ADC noise performance. A clock duty cycle stabilizer is integrated in the ADC for maintaining the ADC’s performance over varying duty cycles. The flexible digital outputs of the converter can be run as single-ended CMOS or differential LVDS.

The LTC2209 has two unique features that simplify receiver design and improve system performance:

>	an internal transparent dither circuit that improves the ADC’s SFDR response well beyond 100 dBc for low level input signals,

>	a digital output randomizer that dramatically reduces unwanted tones caused by digital feedback

The LTC2209 is built in a 9 x 9 mm QFN package, ensuring low power consumption of 1,450 mW @ 3.3 V without the need for heat sinking. The LTC2209 family includes speed grades of 160, 130, 105, 80, 65, 40, 25 and 10 MSPS, all with superior SFDR and SNR performance. In addition to the 16-bit LTC2209, the pin-compatible LTC2209-14 14-bit version will also be available. Samples and demo boards for the LTC2209 are available. The LTC2209 could be ordered in both commercial and industrial temperature grades, and is competitively priced at $72.50 each in 1,000-piece quantities.

The table at the left shows the entire LTC2209 product family.

For further information please contact your local Sasco Holz Branch Office.