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ADC offers programmable voltage inputs

Posted: 21 Nov 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Linear Tech? LTC1857? LTC1858? LTC1859? ADC?

Linear Technology Corp. has introduced a 16bit, 8-channel, 100KSps ADC that offers software programmable input ranges that are fault-protected to 25V. The LTC1859 is easily programmed via a serial interface to accept 0-5V, 0-10V, 5V and 10V inputs, allowing a single-board design to accommodate several industrial applications.

All channels are fault protected to 25V. An overvoltage fault up to 25V on one or more unused channels will not corrupt the accuracy of the selected channel. The new ADC's multiplexer can be configured to accept four differential inputs, eight single-ended inputs or combinations of both. This device offers excellent DC performance of 15bit no missing codes over temperature and 3 LSBMAX INL. The LTC1859 provides full-scale gain and channel-to-channel matching. Hence, the LTC1859 is suitable for multichannel, high-resolution applications such as instrumentation, DAQ systems and industrial process control.

The LTC1859 operates from a single 5V supply, while consuming only 40mW. The LTC1859 also includes a 2.5V internal reference with a temperature coefficient of 10ppm/C, which can be externally driven if greater accuracy is required. For power sensitive applications, the LTC1859 offers two power down modes in which the power dissipation drops to 27.5mW (nap mode) with the reference active, or 40?W (sleep mode) with the reference completely powered down.

The LTC1857 and LTC1858 are pin-compatible 12bit and 14bit devices, respectively. Each is available in SSOP-28 packages, providing a pin-compatible family for performance/cost optimization in the end product. The entire family is available in commercial and industrial temperature ranges. Pricing begins at $17.95 each for the LTC1859, $12.95 each for the LTC1858 and $8.95 each for the LTC1857 in 1,000-piece quantities.

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Related Datasheets
Part Number Description Category
? LTC1859 8-Channel, 16-Bit, 100ksps SoftSpan A/D Converters with Shutdown Cards and Modules
? LTC1858 8-Channel, 14-Bit, 100ksps SoftSpan A/D Converters with Shutdown Cards and Modules
? LTC1857 8-Channel, 12-Bit, 100ksps SoftSpan A/D Converters with Shutdown Cards and Modules



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