MAX5302EUA+T

The MAX5302 contains a voltage-output digital-to-analog converter (DAC) that is easily addressed using a simple 3-wire serial interface. The IC includes a 16-bit shift register, and has a double-buffered input composed of an input register and a DAC register. In addition to the voltage output, the amplifier’s negative input is available to the user. The DAC is an inverted R-2R ladder network that converts a digital input (12 data bits plus 1 sub-bit) into an equivalent analog output voltage in proportion to the applied reference voltage. The reference input accepts positive DC and AC signals. The voltage at the reference input sets the full-scale output voltage for the DAC. The reference input voltage range is 0 to (VDD - 1.4V). The output voltage (VOUT) is represented by a digitally programmable voltage source.

Applications

• Industrial Process Control
• Automatic Test Equipment
• Digital Offset and Gain Adjustment
• Motion Control
• Remote Industrial Control
• Microprocessor-Controlled Systems

Key features

• The MAX5302 combines a low-power, voltage-output, 12-bit digital-to-analog converter (DAC) and a precision output amplifier in an 8-pin µMAX package.
• It operates from a single +5V supply, drawing less than 280µA of supply current.
• The output amplifier’s inverting input is available to the user, allowing specific gain configurations, remote sensing, and high output current capability.
• Other features include a software shutdown and power-on reset.
• The serial interface is SPI/QSPI/MICROWIRE compatible.
• The DAC has a double-buffered input, organized as an input register followed by a DAC register. A 16-bit serial word loads data into the input register. The DAC register can be updated independently or simultaneously with the input register.
• All logic inputs are TTL/CMOS logic compatible and buffered with Schmitt triggers to allow direct interfacing to optocouplers.
• 12-Bit DAC with Configurable Output Amplifier
• +5V Single-Supply Operation
• Low Supply Current: 0.28mA Normal Operation, 2µA Shutdown Mode
• Available in 8-Pin µMAX
• Power-On Reset Clears DAC Output to Zero
• SPI/QSPI/MICROWIRE Compatible
• Schmitt-Trigger Digital Inputs for Direct Optocoupler Interface