Linear Technology Corporationintroduces the LTC2348-18, an 18-bit, 8-channel simultaneous sampling successive approximation register (SAR) ADC claiming industry-leading performance and flexibility. While converting eight channels at 200ksps per channel throughput, each SoftSpan™ input can be independently configured on a conversion-by-conversion basis to accept ±10.24V, 0V to 10.24V, ±5.12V, or 0V to 5.12V signals. The differential analog inputs operate over a wide 34V input common mode range, allowing the ADC to directly digitize a variety of signals to simplify the signal-chain design. The input signal flexibility, combined with unrivaled ±3LSB maximum INL, no missing codes at 18 bits, and 96.7dB SNR, makes the LTC2348-18 well-suited for high performance industrial process control, test and measurement, power line monitoring, instrumentation and automatic test equipment applications.
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The LTC2348-18 features a precision internal reference with 20ppm/degree C maximum temperature coefficient and an integrated reference buffer capable of accurate one-shot measurements, providing space savings in densely packed circuit boards. Optionally, an external 5V reference can be used to expand the analog input range to ±12.5V. The device dissipates 140mW when converting eight channels simultaneously at 200ksps per channel, and features nap and power-down modes to reduce power dissipation at slower throughputs.
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The LTC2348-18 is the first in a family of multichannel 18-/16-bit simultaneous sampling SAR ADCs. All specifications are guaranteed over the extended -40 to 125 degrees C temperature range. The LTC2348-18 is available now in a 48-lead, 7mm x 7mm LQFP package, priced starting at $23.35 each in 1,000-piece quantities.
source: http://www.powerpulse.net/story.php?storyID=32401
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