Linear Technology 16-Bit Octal SPI Digital Analog Converter


v>Linear Technology 16 Bit Octal SPI Digital Analog Converter

Linear Technology 16-Bit Octal SPI Digital Analog Converter

The LTC2656 is a 16-bit octal DAC that offers ±4 LSB INL maximum over temperature, a factor of three times better than the nearest octal competitor. The combination of low 0.1% (max) gain error and low ±2 mV (max) offset error ensure that the LTC2656 remains accurate near the supply rails and provides the user with a wider effective output range. The LTC2656 integrates a precision reference that achieves 2 ppm/°C typical and 10 ppm/°C maximum temperature coefficient. Operating from a single 2.7- to 5.5-V supply, supply current is a low 375 ?A per DAC with the reference activated. Communication is via a four-wire SPI-compatible interface up to 50 MHz. The device offers a wide range of options to meet application-specific requirements. Designers can choose between 16- or 12-bit resolution and an internal 1.25- or 2.048-V reference, which produce a full-scale output voltage of 2.5 or 4.096 V. Alternatively, an external reference of up to half the supply voltage can be for rail-to-rail operation. The LTC2656 also includes a hardware option to power up the DAC outputs at zero-scale or midscale. LTC2656 16-bit and 12-bit DACs and demo boards are now available. Pricing begins at $8.95 each for the 12-bit options and $17.95 each for the 16-bit options in 1,000- piece quantities. [Source : www.linear.com]

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