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D/A converters consume 2-mA supply current during write operations

Sunnyvale, Calif. — These dual and quad buffered, rail-to-rail, 8-bit digital-to-analog converters (D/A converters) from Maxim Integrated Products Inc. tout low power and the I2C interface.

The converters feature a single +2.7 V to +5.5 V supply range, and consume only 200 μA supply current during write operations, while the closest competing nonvolatile D/A converter consumes 3 mA, according to Maxim.

These D/A converters are also the only nonvolatile memory devices with the I²C-interface that accepts data rates up to 400 Ksamples/s, the company said.

A software-selectable shutdown feature reduces the supply current to 20 μA (max), compared to 1 mA of shutdown current from similar devices.

The converters power-up with the last command stored in the nonvolatile memory (prior to power-down), and transfer to the D/A converter registers. This sets the D/A converter outputs to a predefined value. A mute function independently drives each D/A converter output to its respective low-side reference voltage. Addressing options allow multiple devices to be connected to the same I²C bus.

Applications for these low-cost, highly accurace converters include digital gain and offset adjustment, programmable attenuators, portable instruments, and power-amp bias control.

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The MAX5108/MAX5109 (duals) are available in a 6mm x 5mm, 16-pin QSOP package, and the MAX5115/MAX5116 (quads) are available in a 6mm x 8.5mm, 20-pin QSOP package.

Pricing for the MAX5108/MAX5109 and the MAX5115/MAX5116 start at $3.37 and $5.97, respectively (1000-up, FOB USA).Click here for the MAX5109 data sheet. Click here for the MAX5115/MAX5116 data sheets.

Maxim Integrated Products , 1-800-998-8800, www.Maxim-ic.com.

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