+5V, Serial-Input, Voltage-Output 16-Bit DACs

 

Part Number	Replacement	Explanation

Description

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The MAX541/MAX542 are serial-input, voltage-output, 16-bit digital-to-analog converters (DACs) that operate from a single +5V supply. They provide 16-bit performance (±1LSB INL and DNL) over temperature without any adjustments. The DAC output is unbuffered, resulting in a low supply current of 0.3mA and a low offset error of 1LSB.

The DAC output range is 0V to V_REF. For bipolar operation, matched scaling resistors are provided in the MAX542 for use with an external precision op amp (such as the MAX400), generating a ±V_REF output swing. The MAX542 also includes Kelvin-sense connections for the reference and analog ground pins to reduce layout sensitivity. A 16-bit serial word is used to load data into the DAC latch. The 10MHz, 3-wire serial interface is compatible with SPI™/QSPI™/MICROWIRE™, and it also interfaces directly with optocouplers for applications requiring isolation. A power-on reset circuit clears the DAC output to 0V (unipolar mode) when power is initially applied. The MAX541 is available in 8-pin plastic DIP and SO packages. The MAX542 is available in 14-pin plastic DIP and SO packages.

MAX541, MAX542: Functional Block Diagram Enlarge+

Key Features

• Full 16-Bit Performance Without Adjustments
• +5V Single-Supply Operation
• Low Power: 1.5mW
• 1µs Settling Time
• Unbuffered Voltage Output Directly Drives 60-kilohm Loads
• SPI/QSPI/MICROWIRE-Compatible Serial Interface
• Power-On Reset Circuit Clears DAC Output to 0V (unipolar mode)
• Schmitt Trigger Inputs for Direct Optocoupler Interface

Applications/Uses

• Automated Test Equipment (ATE)
• Data Acquisition
• High-Resolution Offset and Gain Adjustment
• Industrial Process Controls