12-/10-/8-bit octal DACs integrate 10ppm/°C reference in tiny packages

Milpitas, Calif.—Linear Technology Corp. has introduced the LTC2636, a family of 12-bit, 10-bit, and 8-bit octal digital-to-analog converters (DACs) that integrate a precision reference in tiny 4mm x 3mm DFN and MSOP packages.

The LTC2636 DACs are ideally suited for driving optical attenuators or setting the current levels for laser diodes. By integrating a 10ppm/°C reference, the LTC2636 offers further space reduction for constrained optical networking circuit boards.

In addition to selecting one of three resolution options, designers can also choose between a 2.5V or 4.096V full-scale range, making the LTC2636 a good fit for 3V or 5V systems. The internal reference is bonded out, providing a convenient way to drive the reference inputs for other data converters in the system. Alternatively, an external reference can be used if greater accuracy or a nonstandard voltage range is required. Ordering option provides the choice between powering up the DACs at zero-scale or mid-scale, offering flexibility for designs that cannot be forced to ground when power is first applied.

Designers can choose between a 14-pin 4mm x 3mm DFN package and an MSOP-16 package that includes a hardware load-DAC (LDAC) pin and a clear pin that asynchronously forces the DAC outputs to their respective reset state. The DACs' specifications are guaranteed over the automotive temperature range (-40°C to +125°C), in addition to the industrial (-40°C to +85°C) and commercial (0°C to +70°C) temperature ranges.

The LTC2636 offers 12-bit DC performance of ±2.5LSB(max) integral nonlinearity error and ±5mV offset error, making it a good fit for open-loop as well as closed-loop systems. The LTC2636 offers < 2.4nVs crosstalk, ensuring that a voltage change on one DAC has minimal effect on the other DACs. Operating from a single 2.7V to 5.5V supply, supply current is 100µA per DAC.

Pricing: Begins at $2.85 each, in 1,000-piece quantities.
Availability: Now.
Datasheet: Click here.

Linear Technology,

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