Multichannel DACs shrink into TSSOPs

Analog Devices has introduced what it claims to be the industry's smallest and most flexible, multichannel digital-to-analogue convertors.

Analog Devices has introduced what it claims to be the industry's smallest and most flexible, multichannel digital-to-analogue convertors (DACs).

Ideal for designers needing flexibility when specifying convertors for high-voltage applications, such as factory process control, instrumentation and DC set-point-control applications, the offering includes 12 convertors ranging from 12 to 16bit dual- and quad-channel devices operating over a wide voltage range on either single or dual power supplies.

In addition, the highly configurable DACs feature software-programmable, unipolar and bipolar voltage output ranges that can be independently set per channel.

This gives designers the option to eliminate a number of discrete components, such as precision resistors, switches, and external amplifiers.

Housed in small, pin-compatible, TSSOP (thin-shrink small-outline) packages, the convertors are more than 40% smaller than comparable devices.

Eliminating discrete components, plus the small package size, translates into board space savings of as much as 70%, when compared with existing discrete solutions.

"With our new family of multichannel DACs, industrial designers can reduce board size and increase reliability in their system with any one of 12 highly integrated parts that contain all the components necessary to perform voltage switching", said Mike Britchfield, Product Line Director, Precision Data Convertors, Analog Devices.

"These highly configurable devices enable a single board or module design to serve multiple applications, such as instrumentation and data acquisition, without the need for jumpers to obtain different versions of the board".

"In addition, by taking advantage of the AD5754R's 16bit performance and excellent TUE (total unadjusted error), designers can reduce cost by eliminating time-consuming factory calibration sequences".

ADI's proprietary iCMOS industrial manufacturing process is used to achieve high voltages needed by industrial applications, while leveraging the integration and cost benefits of submicron process geometry.

When designed into PLC (programmable logic controller) analogue output modules or data-acquisition cards, the flexibility of the output range, operation with multiple supplies, and specified TUE combine to eliminate mechanical jumpers and factory calibration sequences.

This results in faster design cycles, accelerated time to market and reduced cost.

The flagship component in the AD57xx DAC family - the 16bit monotonic AD5754R - achieves an accuracy level of 0.1% (maximum) TUE, and includes a precision 5ppm/C internal reference.

The AD572x, AD573x and AD575x families are offered in dual and quad configurations in resolutions of 12, 14 and 16bit and operate from single supply voltages of 4.5 to 16.5V, or dual supply voltages of +/-4.5 to +/-16.5V.

The output range of the devices is software selectable from options of 5, 10, +/-5, +/-10V plus an overrange setting.

The new DACs incorporate a 30MHz SPI (serial peripheral interface), power-on reset and a per-channel power-down mode.

Additionally, the devices offer hardware LDAC and CLR functionality, and the on-chip programmable precision output amplifier allows rail-to-rail output swing to be achieved, maximising dynamic range and enabling the device to deliver the performance needed in a wide variety of industrial and instrumentation applications.

Each device comes with the option of an integrated precision 5ppm/C reference and is fully specified over the industrial temperature range.

The AD57xx expands ADI's iCMOS precision DAC portfolio of multichannel small package devices, which include the AD5725, AD5744 and AD5764.

The AD57xx family of high-voltage DACs complements ADI's leading iCMOS amplifiers, including the AD8662 and AD8664.

The AD8662 and AD8664 op amps offer the industry's highest precision at 100uV voltage offset specified at 5 and 16V, and low input bias and rail-to-rail output, making them ideal for applications that require high levels of DC accuracy, such as industrial process control and motor control.

All of the devices in the AD57xx family are housed in a 24-lead TSSOP, and sample units are now available.

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