MAX5231

The MAX5230/MAX5231 feature a 13.5MHz SPI?-, QSPI?-, and MICROWIRE?-compatible 3-wire serial interface. The MAX5230/MAX5231 are specified over the extended temperature range (-40°C to +85°C)and are available in 16-pin QSOP packages. An additional data output (DOUT)allows for daisy-chaining and read back. Each DAC has a doublebuffered digital input. The MAX5230/MAX5231 low-power, dual 12-bit voltageoutput 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 470A while the MAX5230 consumes only 420A of supply current. Both devices feature low-power (2A)software and hardwareenabled shutdown modes. The MAX5230/MAX5231 feature two software-selectable shutdown output impedances: 1kor 200k. A power-up reset feature sets DAC outputs at ground or at the midscale DAC code.

The features of MAX5231 can be summarized as (1)internal 10ppm/°C precision bandgap reference 2.465V (MAX5231)/ 1.234V (MAX5230); (2)single-supply operation 5V (MAX5231)/ 3V (MAX5230); (3)low supply current 470A (MAX5231)/ 420A (MAX5230); (4)13.5MHz SPI/QSPI/MICROWIRE-compatible, 3-wire serial interface; (5)pin-programmable power-up reset state to zero or midscale output voltage; (6)programmable shutdown modes with 1k or 200k internal output loads; (7)recalls output state prior to shutdown or reset; (8)buffered output drives 5k || 100pF loads; (9)space-saving 16-Pin QSOP package.

The absolute maximum ratings of MAX5231 are (1)VDD to AGND, DGND: -0.3V to +6V; (2)AGND to DGND: -0.3V to +0.3V; (3)digital inputs to DGND: -0.3V to +6V; (4)digital output (DOUT)to DGND: -0.3V to VDD + 0.3V; (5)OUT_ to AGND: -0.3V to VDD + 0.3V; (6)OS_ to AGND: -4V to VDD + 0.3V; (7)maximum current into any pin: 50mA; (8)continuous power dissipation (TA = +70°C)16-Pin QSOP (derate 8.3mW/°C above +70°C): 667mW; (9)operating temperature range: -40°C to +85°C; (10)storage temperature range: -65°C to +150°C; (11)lead temperature (soldering, 10s): +300°C.