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16-bit A/D draws half the power at full speed

Milpitas, Calif. — Linear Technology Corp. introduced the LTC1867L, a 16-bit, 8-channel, 175 kilosamples/second, 3-V supply analog to digital converter (A/D converter), offering low power without compromising speed or linearity.


The A/D converter draws 2.7 mW (maximum) at full speed, which is roughly one-half the power of competing devices, according to the company. The power automatically drops at reduced speeds, typically 0.9 mW at 50 Ksamples/s. This device maintains strong DC performance providing 16-bits without missing codes over temperature and ±3 least significant bit (LSB) maximum integral nonlinearity (INL). The device is intended for low power applications such as portable instrumentation, industrial process control and medical applications.

The converter offers an easy to use multiplexer and serial interface. The multiplexer allows any combination of single-ended inputs or differential inputs in either unipolar (0 V to 2.5 V) mode or bipolar (±1.25 V) mode. The accuracy of the A/D converter is independent of the shift clock frequency, allowing these parts to operate in opto-isolation or very low power applications.

The device is also available in a 12-bit version (LTC1863L). Both are available in pin compatible 5-V supply versions (LTC1867/LTC1863) and narrow SSOP-16 packages. The LTC1867L/LTC1863L are available in the commercial and industrial temperature ranges.

Pricing begins at $7.75 each for the LTC1867L, and $3.85 each for the LTC1863L both in 1,000-piece quantities. Click here for the data sheets.

Linear Technology , 1-800-456-6327, www.linear.com.

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