Quad DAC consumes half the space

Analog Devices has launched a new product that features four high-accuracy 16bit digital-to-analogue converters (DAC) with +/-10V tolerances and extensive on-chip signal chain integration.

For applications that require extremely precise data conversion in the harshest and noisiest industrial environments, Analog Devices has launched a new product that features four high-accuracy 16bit digital-to-analogue convertors (DACs) with +/-10V tolerances and extensive on-chip signal chain integration.

Using technological advancements enabled by ADI's iCMOS industrial process technology, the AD5764 achieves a three-fold improvement in accuracy over previously available high-voltage DACs while using 50% less board space.

This quad, serial input, bipolar voltage output DAC features 16bit resolution, 1LSB INL, 1LSB DNL, and with gain and offset calibration to less than 1mV.

In addition, the device integrates features essential to reducing design time and overall system cost, including an on-chip 3ppm/C reference (typical), reference buffers, low headroom/wide swing amplifier, temperature sensor, power-on reset, power on/off output control and I/O lines.

This integrated functionality is housed in 7 x 7mm packaging.

"The AD5764 was designed to the exacting specifications of designers of precision industrial and medical equipment customers, to provide the most highly integrated solution for developing systems with the tightest accuracy needs, while reducing system design work and cost", said Mike Britchfield, Product Line Director, Precision Convertors at Analog Devices.

"With the continued innovation in data conversion and manufacturing process technology that enables product breakthroughs like the AD5764, ADI is bringing the combination of performance with previously unattainable space-savings to high precision industrial applications".

Featuring an extended programmable output range of up to +/-10V, the AD5764 allows designers to minimise output headroom requirements and enhance system calibration.

Local ground offset adjustment overcomes system error due to ground impedance errors between the DAC and the load.

The output voltage can be controlled during power-up and brownout conditions by clamping the VOUT pin to 0V via a low impedance path.

The device also provides an on-chip detector output which can be used as an interrupt or to control other parts of the system during a brownout condition.

The amplifier output control can be invoked externally, allowing the output to be controlled by system monitors or supervisors.

Other features include a digital I/O port that can be used to control output signals to multiplexers or to control calibration circuitry elsewhere in the system.

For example, the logic signals from limit switches can be read back via the digital interface.

The device includes an analogue temperature sensor which allows relative temperature measurement - for example, a temperature indicator that can be used to invoke a system calibration.

The device also provides short-circuit protection, eliminating the requirement for external short-circuit current.

The quad 16bit AD5764 DAC is now sampling.

The device is available in small and thin 32-lead TQFP (Thin Quad Flat Package) packaging, measuring 7 x 7mm.

Pricing is $27.00 per unit in 1000-piece quantities.

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