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12-/10-/8-Bit Dual SPI/I2C DACs Integrate 10ppm/°C Reference in Tiny Packages

Mar 15 2011 - MILPITAS, CA
  • Linear Technology Corporation introduces the LTC2632 and LTC2633 families of dual 12-bit, 10-bit and 8-bit rail-to-rail, voltage output digital-to-analog converters (DACs), with serial SPI (LTC2632) and I2C (LTC2633) interfaces. The LTC2632 and LTC2633 dual DACs complete Linear's family of tiny 12-bit, 10-bit, and 8-bit voltage output DACs with internal references. The LTC263x family of single, dual, quad and octal DACs offers a versatile selection, featuring the smallest solution size for numerous trimming applications.


    The LTC2632 and LTC2633 DACs offer accurate DC performance with a 12-bit INL of ±1LSB (max), ±5mV (max) offset error and ±0.8 % FSR (max) gain error. Notable AC performance includes fast 4.4µs settling time and low 2.8nV•s glitch impulse. Each dual DAC integrates a precision 10ppm/°C reference into a tiny 8-lead 3mm × 3mm TSOT-23 package. The devices small size and integrated reference offer space reduction for compact circuit boards, making them ideal for a variety of industrial, automotive, portable communications and ATE applications.


    The LTC2632 and LTC2633 are available in a number of ordering options, allowing designers to select one of the three resolution options, and between a 2.5V (-L) or 4.096V (-H) full-scale output range, making them a good fit for 3V or 5V systems. The devices also offer zero or mid-scale power-on reset options, with the LTC2633-L additionally offering a high impedance (Hi-Z) output option, ideal for power supply margining applications. All options are guaranteed over the automotive (–40°C to +125°C) or commercial (0°C to +70°C) temperature ranges. Pricing begins at $1.56 each in 1,000-piece quantities. For more information, visit www.linear.com/product/LTC2632 or www.linear.com/product/LTC2633.


    Summary of Features: LTC2632/33


    • Integrated Precision Reference:
      • 2.5V Full Scale 10ppm/°C (-L)
      • 4.096V Full Scale 10ppm/°C (-H)
    • Maximum 12-Bit INL Error: ±1LSB (A-Grade)
    • Low Noise: 0.75mVP-P 0.1Hz to 200kHz
    • Guaranteed Monotonic across –40°C to 125°C
    • Selectable Internal or External Reference
    • 2.7V to 5.5V Supply Range (-L)
    • Low Power Operation 0.4mA at 3V
    • Power-On-Reset to Zero-Scale/Mid-Scale & Hi-Z (LTC2633-L)
    • Double-Buffered Data Latches
    • 8-Lead 3mm × 3mm TSOT-23 Packages

    Dual SPI/I2C DACs with Integrated Reference

    LTC2632-33 PR Image

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