Colorado Springs, Colo. - A 14-bit CMOS analog-to-digital converter that operates at 20 Msamples/second is available from Signal Processing Technologies Inc. (SPT) here.
The SPT8000 has a sample-and-hold amplifier and internal references that can be externally overdriven for accurate gain and offset control.
Marketing manager Olav Lindquist said the converter is based on a digitally calibrated, pipelined CMOS architecture, using a proprietary calibration algorithm that is run by an internal microcontroller. In addition to its 20-Msample/s performance, which Lindquist said is approximately twice that of its nearest competitor, the chip offers a typical differential linearity error of plus/minus 0.5 least significant bit and typical integral linearity error of plus/minus 1.2 LSB. Its spurious-free dynamic range is 87 dB, signal-to-noise ratio is 76.5 dB and total harmonic distortion is -84 dBc, all measured at a 5-MHz input frequency.
"This level of performance would normally require a more expensive bipolar or BiCMOS process that would result in power dissipation in the range of 1.5 watts," Lindquist said. Power dissipation in the SPT8000 is 725 mW.
The converter operates over the -40 degrees C to 85 degrees C industrial temperature range. It is housed in a 44-lead thin quad flat pack and is sampling now, priced at $42 in 1,000-piece quantities.
Call (800) 643-3SPT (3778)
EETInfo No. 609