National Semiconductor Introduces 3 Giga-sample ADC

ADC08D1500 and Two Additional ADCs Join Gigahertz-range Family for Unmatched Performance in Test and Measurement, Communications Applications

SANTA CLARA, Calif., Sept. 26 /PRNewswire-FirstCall/ -- National Semiconductor Corporation (NYSE: NSM) today expanded its popular family of gigahertz-speed analog-to-digital converters (ADCs) with the introduction of three new converters that offer the industry's best performance with ultra-low power consumption.

The new products are the ADC08D1500, a dual 8-bit converter capable of sampling one analog input at 3 giga-samples per second (GSPS) when operating in dual-edge sampling (DES) mode or two inputs at 1.5 GSPS; the ADC08D500, a dual, 500 mega-samples per second (MSPS) 8-bit converter; and the ADC081500, a single version of the ADC08D1500. These ADCs join the ADC08D1000 and ADC081000, ultra-low-power gigahertz-speed ADCs introduced last year.

"Gigahertz sampling speeds and excellent dynamic performance used to be synonymous with high power consumption. Today, National is raising the bar with the first 8-bit ADC capable of sampling signals at 3 GSPS while consuming a mere 1.9W. This ADC delivers on both performance and low power consumption," said Antonio Visconti, product line director of National Semiconductor's Data Conversion Division. "National's ultra-high-speed data converters stimulate innovation. Every time we increase performance and sampling speed, we enable new architectures in communications systems and test and measurement equipment where these ADCs are employed."

The new ADCs' low power consumption of less than 2W enables engineers to design without fans and heat sinks, saving board space, reducing system cost and enhancing system reliability. The ADC08D1500 typically achieves 7.2 effective number of bits (ENOB), 45.5 dB signal-to-noise ratio (SNR) and 53.4 dB spurious free dynamic range (SFDR) at 3 GSPS with a 750 MHz input signal. The products guarantee no missing codes over the full operating temperature range of -40 degrees C to +85 degrees C. The ultra-high-speed 8-bit family is well-suited for test and measurement equipment such as digital oscilloscopes, digital capture cards, spectrum analyzers and communications transceiver applications.

About the ADC08D500/1500/D1500

The ADC08D500 and ADC08D1500 join National's ADC08D1000, a dual gigahertz- speed ADC that outperforms other competitive solutions while consuming significantly less power. Like the ADC08D1000, the ADC08D1500 and ADC08D500 digitize two input signals to 8-bit resolution at sampling rates of 1.5 GSPS and 500 MSPS, respectively, while consuming just 1.9W and 1.4W from a 1.9V nominal supply. In DES mode, the ADC08D1500 achieves sampling speeds up to 3 GSPS from one channel by interleaving the two on-chip converters. Both coarse and fine timing adjustments are available, allowing the sampling clock for each channel to be calibrated independently in 0.1 pico-second increments. A three-wire serial bus controls these adjustments, as well as on-chip functionality, and independent gain and offset fine-tuning for I and Q channels. The ADC081500 is a single version of the dual ADC08D1500.

Pricing and Availability

The ADC08D500, ADC081500 and ADC08D1500 are priced at $125, $215 and $350, respectively. All pricing is for 1,000-unit quantities. For more information about the ADCs and to request a sample, visit

About National Semiconductor

National Semiconductor, the industry's premier analog company, creates high-value analog devices and subsystems. National's leading-edge products include power management circuits, display drivers, audio and operational amplifiers, communication interface products and data conversion solutions. National's key analog markets include wireless handsets, displays and a variety of broad electronics markets, including medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, California, National reported sales of $1.91 billion for fiscal 2005, which ended May 29, 2005. Additional company and product information is available at

NOTE: National Semiconductor is a registered trademark of National Semiconductor Corporation. All other brands or product names are trademarks or registered trademarks of their respective holders.

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     Megan Carter                            Design Support Group
     National Semiconductor                  800-272-9959
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