The SQ82928 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 SQ82928 includes an on-chip 1.25V, 20 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 SQ82928 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 SQ82928 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 SQ82928 is available in a 2.605mm x 2.605mm 16-ball CSP package.
