Linear Introduces LTC2635 Rail-To-Rail DACs

Linear Technology's LTC2635 quad 12, 10 and 8bit rail-to-rail digital-to-analogue converters (DACs) integrate a precision 10ppm/C reference in 3 x 3mm QFN and MSOP packages. Ordering options include 2.5V (LTC2635-L) and 4.096V (LTC2635-H) DAC full-scale outputs. The LTC2635-L offers power-on reset to zero and mid-scale options. It also includes ordering options for high impedance outputs at power-on reset and during shutdown.

This allows the DAC to be used in applications such as power-supply margining where the DAC outputs must be electrically isolated from the power supply at power-on, before being called to action to adjust supply voltages up and down. The LTC2635's small size and internal reference are important for a variety of industrial, automotive and ATE applications. The LTC2635 offers 12-bit performance of +/-2.5LSB (max) INL error and 3nVs crosstalk, ensuring that a voltage change on one DAC has minimal effect on the other DACs.

Operating from a single 2.7 to 5.5V supply, supply current is a low 125uA per DAC. In addition to selecting one of three resolution options, designers can also choose between a 2.5 or 4.096V full-scale range, as well as power-up options for zero-scale, mid-scale or Hi-Z. The 16-pin 3 x 3mm QFN package includes a hardware load-DAC (LDAC) pin, three address pins for selecting 27 unique I2C addresses and a Reflo pin.

The 10-pin MSOP package has just one address pin for selection of up to three unique addresses on the I2C bus. All LTC2635 options are guaranteed over the automotive (-40C to +125C) and commercial (0C to +70C) temperature ranges. Pricing begins at USD2.03 (GBP1.31) each in 1,000-piece quantities.

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