Texas Instruments – Low power DAC with precision internal reference available in small packages

The Texas Instruments DACx0508 is a pin-compatible family of low power, eight-channel, buffered voltage-output, DACs with 16, 14 and 12-bit resolution. The DACx0508 includes a 2.5V, 5ppm/C internal reference, eliminating the need for an external precision reference in most applications. A user selectable gain configuration provides full-scale output voltages of 1.25V (gain = ½), 2.5V (gain = 1) or 5V (gain = 2). The device operates from a single 2.7V to 5.5V supply, is specified monotonic and provides high linearity of ±1LSB INL. Communication to the DACx0508 is performed through a serial interface that operates at clock rates up to 50MHz. The VIO pin enables serial interface operation from 1.7V to 5.5V. The devices flexible interface allows operation with a wide range of industry-standard microprocessors and microcontrollers. The device includes a power-on-reset circuit that powers up and maintains the DAC outputs at either zero scale or midscale until a valid code is written to the device. The device consumes a low current of 0.6mA/channel at 5.5V, making it suitable for battery-operated equipment. A per-channel power-down feature reduces the device's current consumption to 15µA. The device is characterised for operation over the temperature range of –40C to 125C and is available in small packages.