If you are looking for a way to convert a digital stream of data into a perceptible analog signal, Linear Technology brings you their LTC2620IGN DAC converter as a solution. It has a voltage output. This device"s digital interface is serial (3-wire, spi, microwire). This DAC has a resolution of 12bit. This DAC has a minimum operating temperature of -40 °C and a maximum of 85 °C. This device uses a single power supply.
