General Description
The MAX5120/MAX5121 are low-power, 12-bit, voltage output digital-to-analog converters (DACs) with an internal precision bandgap reference and an output amplifier. The MAX5120 operates on a +5V supply with an internal amplifier reference of +2.5V and is capable of a +4.095V full-scale output range. The MAX5121, operating on +3V, delivers its +2.0475V full-scale output with an internal precision reference of +1.25V. If necessary, the user can override the internal, <10ppm/°C voltage reference with an external reference. Both devices draw only 500µA of supply current, which reduces to 3µA in power-down mode. In addition, their power-up reset feature allows for a user-selectable initial output state of either 0V or midscale and minimizes output voltage glitches during power-up.

Features
♦ Single-Supply Operation +5V (MAX5120) +3V (MAX5121)
♦ Full-Scale Output Range +4.095V (MAX5120) +2.0475V (MAX5121)
♦ Built-In 10ppm/°C (max) Precision Bandgap Reference +2.5V (MAX5120) +1.25V (MAX5121)
♦ Adjustable Output Offset
♦ SPI/QSPI/MICROWIRE-Compatible, 3-Wire Serial Interface
♦ Pin-Programmable Shutdown Mode and PowerUp Reset (0V or Midscale Output Voltage)
♦ Buffered Output Capable of Driving 5kΩ 100pF or 4–20mA Loads
♦ Space-Saving 16-Pin QSOP Package
♦ Pin-Compatible 13-Bit Upgrades Available (MAX5130/MAX5131)
♦ Pin-Compatible 14-Bit Upgrades Available (MAX5170/MAX5172)

Applications
    Industrial Process Controls
    Automatic Test Equipment (ATE)
    Digital Offset and Gain Adjustment
    Motion Control
    µP-Controlled Systems