TI Introduces 16-Channel, 24-Bit ADC with Best-in-Class Settling Time

DALLAS, Nov. 3 /PRNewswire/ -- Texas Instruments Incorporated (NYSE: TXN) (TI) today announced a 16-channel, 24-bit analog-to-digital converter (ADC) from the company's Burr-Brown product line which features the fastest channel cycle rate (23.7kSPS) and lowest latency (42us) in its class. Fabricated on TI's high-performance, precision mixed-signal CMOS technology, the ADS1258 is optimized for multi-channel applications such as machine and system monitoring, data acquisition, medical, avionics, test and measurement, instrumentation, and industrial process control. (See http://www.ti.com/sc05240 .)

The ADS1258 offers fixed-channel (125kSPS data rate) or automatic channel scan (23.7kSPS data rate) modes with 20 bits of effective resolution. Traditionally with most delta-sigma converters, the data must be allowed to settle for several readings after switching input channels. The ADS1258 eliminates this requirement by providing fully settled data as each new channel data is obtained.

"Unmatched in speed for a 24-bit delta-sigma converter, the ADS1258 can measure all of its 16 input channels in less than 675us with only 12uVrms of input referred noise, providing breakthrough performance for precision, multi- channel applications," said Mark Berarducci, systems engineer for TI's oversampling data converter products. Other performance features include 0.5uV/C offset drift, a maximum of 0.0010% of full-scale integral nonlinearity and 43mW power dissipation.

The flexible input multiplexer accepts combinations of eight differential or 16 single-ended inputs with a full-scale differential range of 5V or true bipolar range of +/-2.5V. The output of the multiplexer is externally accessible to allow use of a shared signal conditioning block prior to the input of the ADC. Internal switches simplify the monitoring of the supply voltage, temperature and reference voltage. The system clock can be generated using the onchip PLL with a low cost 32.786kHz crystal or an external clock source. Conversions are controlled by either a dedicated hardware pin or software command. The ADS1258's SPI-compatible serial interface connects easily to microcontrollers, including TI's MSP430 ultra-low power microcontroller family.

Availability and Packaging

The ADS1258 is packaged in a QFN-48 (7mm x 7mm) and is priced from $8.95 in 1,000 piece quantities (suggested resale pricing). The device is available now from TI and its authorized distributors. Evaluation modules will be available soon.

TI offers analog engineers a wide-ranging support infrastructure that includes training and seminars, design tools and utilities, technical documentation, evaluation modules, an online KnowledgeBase, a product information hotline and a comprehensive offering of samples that ship within 24 hours of request. For more information on TI's complete analog design support, and to download the latest Amplifier and Data Converter Selection Guide, visit http://www.ti.com/dataconverter .

Texas Instruments Incorporated provides innovative DSP and analog technologies to meet our customers' real world signal processing requirements. In addition to Semiconductor, the company's businesses include Sensors & Controls, and Educational & Productivity Solutions. TI is headquartered in Dallas, Texas, and has manufacturing, design or sales operations in more than 25 countries.

Texas Instruments is traded on the New York Stock Exchange under the symbol TXN. More information is located on the World Wide Web at http://www.ti.com .

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    Safe Harbor Statement

Statements contained in this news release regarding TI product availability and other statements of management's beliefs, goals and expectations may be considered forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995, and are subject to risks and uncertainties that could cause actual results to differ materially from those expressed or implied by these statements. The following factors and the factors discussed in TI's most recent Form 10-K could cause actual results to differ materially from the statements contained in this news release: actual market demand for ADC products and TI products specifically, and actual test results relating to TI products. TI disclaims any intention or obligation to update any forward-looking statements as a result of developments occurring after the date of this news release.


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