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TI Introduces Industry's Fastest 18-Bit Analog-to-Digital Converter

Jul 8, 2003

TUCSON, Ariz. (July 8, 2003) - Extending the industry´s leading delta-sigma data converter portfolio, Texas Instruments (TI) Incorporated (NYSE: TXN) today introduced the industry´s fastest 18-bit analog-to-digital converter (ADC) from the company´s Burr-Brown product line. Featuring a 1.25 mega samples per second (MSPS) data rate with outstanding high-speed performance, the ADS1625 is ideal for demanding measurement requirements in scientific instrumentation, automated test equipment, data acquisition and medical imaging. (See dataconverter.ti.com/sc03145.)

"The unmatched combination of resolution, speed and noise performance provides instrumentation designers with a superior solution for upgrading their current and next-generation designs," said Rich Wegner, strategic marketing manager for TI's oversampling data converter products.
The ADS1625 features 93dB signal-to-noise ratio (SNR), -101dB total harmonic distortion (THD) and 103dB spurious-free dynamic range (SFDR). Input bandwidth is 615kHz (-3dB) and passband ripple is less than +/-0.0025dB (to 550kHz).
The input signal is measured against a voltage reference that can be generated on-chip or supplied externally. The digital output data is provided over a simple parallel interface that directly connects to TI´s TMS320C6000TM DSP family. An out-of-range monitor reports when the input range has been exceeded. 
The device operates from a +5V analog supply and a +3V digital supply. The digital I/O supply operates from +2.7V to +5.25V, enabling the digital interface to support a range of logic families. Power dissipation is set by an external resistor and can be reduced when operating at slower speeds (150mW to 515mW). A power-down mode, activated by a digital pin, shuts down all circuitry.
The ADS1625 is pin compatible with TI's previously introduced ADS1605 (16-bit, 5MSPS ADC) to provide an easy upgrade path.

Available Today

The ADS1625 comes in a 64-lead TQFP package incorporating TI´s PowerPADTM technology, and is available now from TI and its authorized distributors. The ADS1625 is priced from $37.90 in 1,000 piece quantities (suggested resale pricing).