ADCs Take A Chunk Out Of Power Consumption

In addition to staking claim as the industry's smallest, the ADS5281, ADS5282, and ADS5287 eight-channel ADCs promise power-consumption reductions in the realm of 30% over comparable devices. At their highest sample rate of 65 Msamples/s, the trio consumes as little as 77 mW per channel. With dynamic scaling at a 30 Msample/s rate, per-channel power consumption is as low as 48 mW. The ADCs interface with the company's VCA8500 octal variable gain amplifier, which features 0.8-nV/ÖHz input noise at 63 mW per channel. The ADS5281 devices come in 64-pin, 9 mm x 9 mm QFN packages and feature a low-frequency noise suppression mode that eliminates 1/f (Flicker) noise, improving SNR by up to 4.2 dB over a 1-MHz band. Other features include overload recovery circuitry and programmable gain from 0 to 12 dB. Prices for the 12-bit ADS5281, 12-bit ADS5282, and 10-bit ADS5287 are $60, $68.60, and $40 each/100, respectively. TEXAS INSTRUMENTS INC., Dallas, TX. (800) 477-8924.