Lower system costs with tiny D/A converter

Norwood, Mass. — Analog Devices, Inc. expanded its nanoDAC family with eight devices including a 16-bit, quad, digital-to-analog converter in a 3 x 3-mm, 10-lead LFCSP.

Unlike existing solutions that require an external reference, the nanoDAC converters lower system cost by integrating an on-chip reference and providing the industry's smallest footprint, said Mike Britchfield, product line director of ADI's Precision Signal Processing group. The lead frame chip scale package (LFCSP) will free up to 70 percent more board space, he said.

ADI's flagship device — the AD5664R 16-bit quad D/A converter — offers power consumption of 5 milliwatts at 5 volts including reference, making it suitable for industrial and communications products such as programmable logic controller (PLC) cards, analog I/O boards and basestations. It integrates four buffered 16-bit D/A converters in addition to an on-chip 1.25-V, 5-ppm/°C reference.

ADI's seven other nanoDAC converters offer pin compatible 12-bit to 16-bit resolution in dual and quad configurations with and without on-chip references: the quad AD5624, AD5624R, AD5644R and AD5664, and the dual AD5643R, AD5663 and AD5663R.

All devices incorporate a power-on reset and a per-channel power-down mode that, in the quad-channel devices, reduces the current consumption of the device to 480 nanoamps at 5 V. In addition, the dual channel devices offer hardware LDAC and CLR functionality and the on-chip precision output amplifier allows rail-to-rail output swing.

All of the devices are currently sampling, with full production slated for April. In addition to the 10-lead LFCSP package, the devices are also available in a 10-lead MSOP.

See related block diagram

Per-unit pricing ranges from $5.49 to $11.40 for the quad devices and from $5.05 to $6.90 for the dual devices — based on resolution and the inclusion of the on-chip reference — in 1,000-piece quantities. Click here for the data sheets.

Analog Devices Inc. , 1-800-262-5643,

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