DAC suits automotive systems and test equipment
Linear Technology
LTC2654 DAC
Linear Technology has introduced the LTC2654, a quad voltage output 16- and 12-bit digital-to-analogue converter for applications in mobile communication, process control and industrial automation.
The LTC2654 digital-to-analogue converter (DAC) has an internal reference and SPI interface.
LTC2654 DACs achieve 16-bit performance of +/-4LSB INL maximum over temperature, a factor of two better than the nearest 16-bit quad competitor with internal reference, according to Linear Technology.
LTC2654 has a low offset error +/-2mV (max) and low gain error 0.1 per cent (max), a combination that ensures that the LTC2654 remains accurate near the supply rails and provides users with a wider effective output range.
LTC2654's precision specifications make it ideal for multichannel, open-loop and closed-loop systems.
Applications include mobile communication, process control and industrial automation, automated test equipment (ATE) and automotive systems.
The LTC2654's integrated reference achieves 2ppm/C typical and 10ppm/C maximum temperature coefficient.
It is offered in 20-pin 4 x 4mm QFN and 16-pin TSSOP packages, providing space savings densely packed circuit boards.
AC performance stands out, as LTC2654 offers 8.9us settling time for a half-scale step and 3nVs crosstalk, resulting in minimal disturbance between DAC channels.
The LTC2654 operates from a single 2.7V to 5.5V supply and communicates via a four-wire SPI/Microwire compatible interface up to 50MHz.
The LTC2654 offers a wide of options to meet application-specific requirements.
Designers can choose between 16- or 12-bit resolution and an internal 1.25V or 2.048V reference, which produce a full-scale output voltage of 2.5V or 4.096V.
Alternatively, an external reference up to half the supply voltage can be used for rail-to-rail operation.
The LTC2654 includes a hardware option to power up the DAC outputs at zero-scale or mid-scale, allowing more flexibility for designs that cannot be forced to ground when power is first applied.
LTC2654 16-bit and 12-bit DACs and demo boards are now available.
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