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Tiny ADC warrants 16bit performance

Posted: 20 Nov 2007 ?? ?Print Version ?Bookmark and Share

Keywords:16bit ADC? tiny LTC2453? I2C delta sigma?

The LTC2453 from Linear Technology Corp. is a 16bit I2C-compatible delta sigma ADC in a 3mm x 2mm DFN package. According to Linear, the ADC's tiny size, low power and16bit resolution improves performance of portable instruments and sensors. Operating from a single 2.7-5.5V supply, the LTC2453 is capable of measuring a differential input up to VCC. This wide input range, claims Linear, is ideal for measuring a wide variety of single-ended or differential sensors.

The LTC2453 achieves 16bit DC performance of 2LSB integral nonlinearity error, 1.4?VRMS transition noise and 0.01 percent gain error. It has an internal oscillator and allows up to 60 conversions per second, which according to Linear, makes it easy to measure temperature, pressure, voltage, or other low-frequency sensor outputs. The LTC2453 draws 800?A of supply current at the 60Hz maximum sample rate. After each conversion, supply current is reduced to less than 0.2?A, further preserving battery power. If the user samples the device once a second, the LTC2453 dissipates only 40?W from a 3V supply.

The LTC2453 includes continuous internal offset and full-scale calibration of the input signal, ensuring accuracy over time and over the full operating temperature range. According to Linear, the adoption of its No Latency Delta SigmaTM design allows the ADC to multiplex several inputs with no delay in reading the output data. The LTC2453 incorporates a proprietary sampling network that reduces the dynamic input current to less than 50nA, supporting a wide range of external input protection and filter circuits.

The LTC2453 is available today in both commercial and industrial temperature grade versions, with prices starting at $1.25 each in 1,000-piece quantities.

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Related Datasheets
Part Number Description Category
? LTC2453 Easy-to-Use, Ultra-Tiny, Differential, 16-Bit Delta Sigma ADC With I2C Interface Cards and Modules



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