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12bit ADC features 500KSps throughput

Posted: 04 Sep 2007 ?? ?Print Version ?Bookmark and Share

Keywords:12bit ADC? high throughput rates?

Linear Technology Corp. has introduced the LTC2308, a 12bit ADC that measures eight single-ended input channels, four differential input channels, or combinations of both for digitizing multiple DAQ signals with a single chip.

LTC2308 features an internal 8-channel mux and communicates via an SPI-compatible serial interface at throughput rates up to 500KSps. With the combination of an internal reference and a tiny 4mm x 4mm QFN-24 package, the LTC2308 provides a high level of integration to reduce board area and total system cost, making it suitable for portable instruments and space-constrained designs.

The LTC2308 chip operates from a single 5V supply, drawing only 17mW at the 500KSps throughput rate. Power dissipation can be further decreased with two shutdown modes. Nap mode reduces the power to 1.15mW at 1KSps and sleep mode shuts down all internal circuitry and reduces the power to 35?W. The LTC2308 measures unipolar or bipolar input signals, achieving excellent DC specifications, including 2mV(max) zero-scale error and 4LSB(max) full-scale error. The LTC2308 excels when digitizing AC input signals, measuring 73dB SINAD and -88dB THD at 1kHz. A separate digital output supply voltage (OVDD) allows users to configure the serial data output for power supplies ranging from 3V to 5V logic.

The LTC2308 is available today in both commercial and industrial temperature grades and is priced starting at 2.95 for 1,000-piece quantities.

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