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MAX5741：10-Bit, Low-Power, Quad, Voltage-Output DAC with Serial Interface

The MAX5741 quad, 10-bit, low-power, buffered voltage-output, digital-to-analog converter (DAC) is packaged in a space-saving 10-pin µMAX® package (5mm x 3mm). The wide supply voltage range of +2.7V to +5.5V and 229µA supply current accommodates low-power and low-voltage applications. DAC outputs employ on-chip precision output amplifiers that swing rail-to-rail. The MAX5741's reference input accepts a voltage range from 0 to VDD. In power-down the reference input is high impedance, further reducing the system's total power consumption. The 20MHz, 3-wire SPI™, QSPI™, MICROWIRE™ and DSP-compatible serial interface saves board space and reduces the complexity of opto- and transformer-isolated applications. The MAX5741 on-chip power-on reset (POR) circuit resets the DAC outputs to zero and loads the output with a 100kΩ resistor to ground. This provides additional safety for applications that drive valves or other transducers that need to be off on power-up. The MAX5741's software controlled power-down reduces supply current to less than 1µA and provides software-selectable output loads (1kΩ, 100kΩ, or high impedance) while in power-down. The MAX5741 is specified over the -40°C to +125°C extended temperature range and available in a 10-pin µMAX package

Key Features Ultra-Low Power Consumption 229µA at VDD = +3.6V 271µA at VDD = +5.5V Wide +2.7V to +5.5V Single-Supply Range 10-Pin µMAX Package 0.3µA Power-Down Current Guaranteed 10-Bit Monotonicity (±1 LSB DNL) Safe Power-Up Reset to Zero Volts at DAC Output Three Software-Selectable Power-Down Impedances (100kΩ, 1kΩ, Hi-Z) Fast 20MHz, 3-Wire SPI, QSPI, and MICROWIRE-Compatible Serial Interface Rail-to-Rail Output Buffer Amplifiers Schmitt-Triggered Logic Inputs for Direct Interfacing to Optocouplers Wide -40°C to +125°C Operating Temperature Range

MAX5741: Functional Diagram Applications/Uses Automatic Tuning Battery-Powered Instruments Gain and Offset Adjustment Power Amplifier Control Process-Control I/O Boards VCO Control

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