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Quad 12-Bit/10-Bit/8-Bit DACs Include 10ppm/°C Reference

Apr 21 2009 - MILPITAS, CA
  • Linear Technology Corporation introduces the LTC2634 quad 12-bit, 10-bit and 8-bit rail-to-rail digital-to-analog converters (DACs), which integrate a precision reference in tiny 3mm × 3mm QFN and MSOP packages. The LTC2634 is the latest offering in Linear’s family of tiny 12-bit, 10-bit, and 8-bit DACs with internal references. The LTC2634 joins the previously released LTC2636 octal and LTC2630/LTC2640 single channel DACs, offering a versatile selection of the smallest DACs for numerous applications.


    The LTC2634’s small size and internal reference is important for a variety of industrial, automotive and ATE applications. By integrating a 10ppm/°C reference, the LTC2636 offers further space reduction for compact circuit boards. The LTC2634 offers 12-bit performance of ±2.5LSB (max) INL error and < 2.4nV•s 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 a low 125uA per DAC.


    The LTC2634 DACs are available in a number of ordering options to meet a wide range of applications. In addition to selecting one of three resolution options, designers can also choose between a 2.5V or 4.096V full-scale range. Ordering options provide 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 an MSOP-10 package or a 16-pin 3mm × 3mm QFN package that includes a hardware load-DAC (LDAC) pin, a clear pin that asynchronously forces the DAC outputs to their respective reset state, and a serial data output pin. All LTC2634 options are guaranteed over three temperature ranges: automotive (40°C to +125°C), industrial (40°C to +85°C), and commercial (0°C to +70°C). Pricing begins at $2.03 each for the 8-bit options, in 1,000-piece quantities. www.linear.com.


    Part Number Bits DACs I/O Packages
    LTC2636 12, 10, 8 8 SPI 4mm × 3mm DFN-14, MSOP-16
    LTC2634 12, 10, 8 4 SPI 3mm × 3mm QFN-16, MSOP-10
    LTC2632* 12, 10, 8 2 SPI 3mm × 2mm DFN-10, TSOT23-8
    LTC2630/LTC2640 12, 10, 8 1 SPI SC70-6/TSOT23-8
    LTC2631 12, 10, 8 1 I2C TSOT23-8
    * Future Product. Contact Linear Technology for Availability.

    Summary of Features: LTC2634


    • Integrated Precision Reference
      • 2.5V 10ppm/°C (LTC2634-L)
      • 4.096V 10ppm/°C (LTC2634-H)
    • Maximum 12-Bit INL Error: ±2.5LSB
    • Pin- & Software-Compatible SPI DACs
    • Guaranteed Monotonic Over –40°C to +125°C Temperature Range
    • Ultralow Crosstalk Between DACs (<2.4nV•s)
    • Low Noise (0.7mVpp, 0.1Hz to 200kHz)
    • Selectable Internal or External Reference: Input or 10ppm/°C Output
    • 2.7V to 5.5V Supply Range (LTC2634-L)
    • Low Power Operation: 125uA per DAC
    • Power-on Reset to Zero-Scale or Mid-Scale Options
    • Tiny 3mm × 3mm QFN-16 & MSOP-10 Packages

    12-/10-/8-Bit Quad DACs Integrate Reference in Tiny 3mm × 3mm & ;MSOP Packages


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