Speed Record Claimed For 18-Bit ADC

Logging on as the industry’s fastest 18-bit a/d converter, the ADS1625 delivers a sampling rate up to 1.25 Msamples/s. The device features a SNR of 93 dB with a THD of -101 dB and a 103 dB SFDR. Input bandwidth is 615 kHz (-3dB) and passband ripple is less than ±0.0025 dB up to 550 kHz. The device operates from a 5V analog supply and a 3V digital supply while the digital I/O supply operates from 2.7V to 5.25V to accommodate a range of logic families. Set by an external resistor, power dissipation can be reduced to 150 to 515 mW when operating at slower speeds. Offered in a 64-lead TQFP with the company's PowerPAD technology, price is $37.90 each/1,000. TEXAS INSTRUMENTS INC, Dallas, TX. (800) 477-8924.