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SQ82918QIQ

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Octal, 12-Bit, SPI, Voltage Output DAC with Internal Reference
    Part NumberSQ82918QIQ
    Description12 Bit 8 Channel DAC
    VDD (V)2.7-5.5
    Resolution (bit)12
    Channels8
    INL (Max) (LSB)±1.0
    Offset Error (Max) (mV)±7.9
    Gain Error (max)±0.29%
    with refYes(1.25V)
    Power-on reset to CodeZero
    PackageQFN4×4-16
    • Low Power, Small Footprint, Octal, 12-bit DAC
    • 2.7V to 5.5V Power Supply
    • Power-down Capability. 
    • Shutdown Current: 0.1µA at 3V and 0.2µA at 5V(typ.)
    • On-chip 1.25V, 11 ppm/°C Reference
    • Power-on Reset to 0V
    • Configurable Power-down DAC Outputs.
    • Hardware/Software LDAC_N and LDAC_N Controls
    • Software Configurable DAC Output Reset to 0, Mid-Scale or Full-Scale
    • Rail-to-rail Operation
    • Available in 16-lead QFN Package

    The SQ82918 is an octal, 12-bit, buffered voltage-output DAC with low power consumption. The device is a highly efficient and accurate digital-to-analog converter designed for applications requiring the conversion of digital signals into analog voltages. Operating within a voltage supply range of 2.7V to 5.5V, this device is suitable for a wide range of electronic systems. The SQ82918 includes an on-chip 1.25V, 11 ppm/°C reference with an internal gain of two, providing full-scale output voltage range of 2.5V. The internal reference is turned off at power-up, and an external reference is enabled by default. The internal reference can be selected and enabled using a SPI write. 

    The SQ82918 power-on reset output voltages are set to 0V and remain at this level until a valid write occurs. The device has a power-down feature, which can significantly reduce current consumption to as low as 0.1µA at 3V (0.2µA at 5V), offering software selectable output load for individual or multiple DAC channels during power-down mode and optimizing power efficiency. The SQ82918 also offers a simultaneous update LDAC_N input pin, enabling the simultaneous update of all DAC outputs. This feature is further enhanced by the capability to select specific DAC channels for the simultaneous update, providing precise control over the output voltages. The device features an asynchronous CLR_N input pin that allows all DAC outputs to be updated to a user-programmable zero, midscale, or full scale.

    The versatile 3-wire serial interface operates at clock rates of up to 50MHz and is compatible with standard SPI®, QSPITM, MICROWIRETM, and DSP interface standards. The on-chip precision output amplifiers facilitates rail-to-rail output swing.

    The SQ82918 is available in a 4mm x 4mm 16-lead QFN package.

    Technical Documentation