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MAX5231：3V/5V, 12-Bit, Serial Voltage-Output Dual DACs with Internal Reference

The MAX5230/MAX5231 low-power, dual 12-bit voltage-output digital-to-analog converters (DACs) feature an internal 10ppm/°C precision bandgap voltage reference and precision output amplifiers. The MAX5231 operates on a single 5V supply with an internal 2.5V reference and features a 4.095V full-scale output range. The MAX5230 operates on a single 3V supply with an internal 1.25V reference and features a 2.0475V full-scale output range. The MAX5231 consumes only 470µA while the MAX5230 consumes only 420µA of supply current. Both devices feature low-power (2µA) software- and hardware-enabled shutdown modes. The MAX5230/MAX5231 feature a 13.5MHz SPI™-, QSPI™-, and MICROWIRE™-compatible 3-wire serial interface. An additional data output (DOUT) allows for daisy-chaining and read back. Each DAC has a double-buffered digital input. The MAX5230/MAX5231 feature two software-selectable shutdown output impedances: 1kΩ or 200kΩ. A power-up reset feature sets DAC outputs at ground or at the midscale DAC code. The MAX5230/MAX5231 are specified over the extended temperature range (-40°C to +85°C) and are available in 16-pin QSOP packages.

Key Features Internal 10ppm/°C Precision Bandgap Reference 2.465V (MAX5231) 1.234V (MAX5230) Single-Supply Operation 5V (MAX5231) 3V (MAX5230) Low Supply Current 470µA (MAX5231) 420µA (MAX5230) 13.5MHz SPI/QSPI/MICROWIRE-Compatible, 3-Wire Serial Interface Pin-Programmable Power-Up Reset State to Zero or Midscale Output Voltage Programmable Shutdown Modes with 1kΩ or 200kΩ Internal Output Loads Recalls Output State Prior to Shutdown or Reset Buffered Output Drives 5kΩ || 100pF Loads Space-Saving 16-Pin QSOP Package

MAX5230, MAX5231: Functional Diagram Applications/Uses µP-Controlled Systems Automated Test Equipment (ATE) Digital Offset and Gain Adjustments Industrial Process Controls Motion Control

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