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Linear ADC features no latency Delta-Sigma architecture

Posted: 09 Jul 2004 ?? ?Print Version ?Bookmark and Share

Keywords:linear technology? adc? no latency delta-sigma architecture? ltc2439-1? ltc2418?

Linear Technology Corp. introduced an 8-channel, differential input, low cost 16-bit ADC with a proprietary No Latency Delta-Sigma architecture that allows single-cycle settling time.

The LTC2439-1 combines high accuracy with all around ease-of-use. A wide common mode input range simplifies analog front-end circuitry, and an accurate internal oscillator eliminates external crystals or clocks to simplify design and save board space.

The device simultaneously rejects 50Hz and 60Hz line frequencies, allowing direct connection to most sensors. The reference voltage can range from 0.1V to Vcc, maintaining 16-bit performance and providing flexibility in ratiometric and remote sensing applications.

Operating between the 2.7V to 5.5V supply range, the ADC consumes 200?A of supply current during conversion and 2?A during shutdown. It features a 0.2LSB total unadjusted error, 1?V RMS noise, 5?V offset error, and 0.16LSB full-scale error.

Available in the 28-pin SSOP package in both commercial and industrial temperature ranges, the LTC2439-1 is pin-compatible with the 24-bit LTC2418. Pricing begins at $3.75 each in 1,000-piece quantities.

Target applications for the new device include temperature or pressure sensors, process control equipment, or other applications that demand precise measurement of several inputs.

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