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Texas Instruments : Delta-sigma converter has dual-path digital filter



Texas Instruments Incorporated has introduced a high-resolution (24-bit), high-speed (625kSPS) delta-sigma analog-to-digital converter (ADC). The ADS1672 features a unique combination of wide bandwidth, outstanding AC and DC performance, and a dual-path digital filter to give greater flexibility to designers of automated test equipment, test and measurement, medical instrumentation, vibration analysis and sonar/military equipment. (See http://www.ti.com/ads1672-pr.)

The user-selectable dual-path digital filter allows designers to easily optimize between bandwidth and latency to maximize performance of their application. The wide-bandwidth path provides outstanding AC performance of 305kHz bandwidth path and very low passband ripple, enabling continuous measurements, such as those required in sonar, vibration monitoring and communications equipment. The low-latency path provides industry-leading settling time of only 5.5us for applications with transient inputs or when used with a multiplexer.

The ADS1672 integrates a chopper-stabilized modulator, which enables both AC performance and DC accuracy characteristics, such as the following:

* AC performance: 107dB dynamic range at 625kSPS, 116dB dynamic at 78kSPS and -115dB total harmonic distortion (THD)
* DC accuracy: 3ppm integral nonlinearity, 2uV/C offset drift, 2ppm/C gain drift

The ADS1672 features a selectable serial interface, either LVDS or CMOS, for easy connectivity to MCUs, DSPs or FPGAs. Operating from a single 5V analog supply and 3V digital supply, the ADS1672 is very energy efficient, dissipating only 350mW of power. It is fully specified over the industrial temperature range of -40C to 85C.

TI offers a wide variety of parts to complete the signal chain for precision industrial applications, including the OPA211 and THS4520 operational amplifiers and the REF50xx voltage references.

Availability and Packaging

The ADS1672 is available now in a TQFP-64 package starting at $11.75 each in 1000-piece quantities (suggested resale pricing). The easy-to-use evaluation modules (EVM) for this device will be available in 4Q08. To learn more about TI‚s comprehensive portfolio of data converters and to download the latest Amplifier and Data Converter Selection Guide, visit http://dataconverter.ti.com.

About Texas Instruments

Texas Instruments (NYSE: TXN) helps customers solve problems and develop new electronics that make the world smarter, healthier, safer, greener and more fun. A global semiconductor company, TI innovates through manufacturing, design and sales operations in more than 25 countries. For more information, go to www.ti.com.

Texas Instruments
European Customer Support Center
Email:
Toll Free: 00800 ASK TEXAS (00800 275 83927)
If Toll Free number is not available: +49 8161 80 2121


Note: The above text is the public part of the press release obtained from the manufacturer (with minor modifications). EETimes Europe cannot be held responsible for the claims and statements made by the manufacturer. The text is intended as a supplement to the new product presentations in EETimes Europe magazine.


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