Analog-to-Digital Converters offer noise-free resolution.

Press Release Summary:

Models ADS1255 and ADS1256 are 24-bit ADCs offering resolution up to 23 bits, data rates up to 30 kSPS, and ±0.0010% non-linearity. Both are comprised of 4th order, delta-sigma modulator followed by programmable digital filter. Model ADS1255 supports one differential or 2 single-ended inputs and has 2 general-purpose digital I/Os. Model ADS1256 supports 4 differential or 8 single-ended inputs and has 4 general-purpose digital I/Os.

Original Press Release:

TI Unveils Industry's Highest Performance Industrial ADCs Featuring Best-In-Class Noise Performance and Speed

TUCSON, Ariz. (Aug. 28, 2003) - Texas Instruments (TI) Incorporated (NYSE: TXN) today introduced the industry's highest performance analog-to-digital converters (ADCs) for industrial applications from the company's Burr-Brown product line. Featuring best-in-class combination of noise-free resolution, data rate and functionality, these 24-bit delta-sigma ADCs provide designers with complete, high-resolution measurement solutions for the most demanding industrial applications, including scientific instrumentation, process control, medical equipment and weighing scales. (See "When talking with instrumentation designers, we identified the need for a converter that offers high conversion rates while preserving the effective resolution of low-speed designs in order to enhance overall system performance. Designed to meet this demand, the ADS1255 and ADS1256 offer an unmatched combination of noise performance, speed and features which allows users to reach new levels of measurement accuracy with extended bandwidth," said Rich Wegner, strategic marketing manager for TI's oversampling data converter products. Wegner added: "The flexibility and high conversion rate also allows customers to reconfigure an ADS1256 design to meet the speed/resolution requirements of multiple applications with a simple change in programming." The ADS1255 and ADS1256 offer noise-free resolution up to 23 bits, data rates up to 30k samples per second (kSPS), +/-0.0010% nonlinearity (max) and a host of onboard peripherals (input multiplexer, input buffer, programmable gain amplifier). Both converters are comprised of a 4th order, delta-sigma modulator followed by a programmable digital filter. The flexible input multiplexer handles differential or single-ended signals and includes circuitry to verify the integrity of the external sensor connected to the inputs. The input also includes a chopper-stabilized buffer providing very high input impedance and a low-noise programmable gain amplifier (PGA) with gains of 1 to 64. The programmable filter allows the user to optimize between resolution and data rate. When measuring multiplexed inputs, these devices cycle quickly between channels without data loss. One-shot conversions can be performed to achieve power savings with a low-power standby mode. The ADS1255 supports one differential or two single-ended inputs and has two general-purpose digital I/Os. The ADS1256 supports four differential or eight single-ended inputs and has four general-purpose digital I/Os. Communication is handled over an SPI(tm)-compatible serial interface.

Available Today

The ADS1255 is packaged in an SSOP-20 and is priced from $7.95 in 1,000 piece quantities. The ADS1256 comes in an SSOP-28 and is priced from $8.95 in 1,000 piece quantities. All pricing is suggested resale.

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

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