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Ultralow-glitch DAC suits closed-loop control apps

Posted: 01 May 2007 ?? ?Print Version ?Bookmark and Share

Keywords:ultralow-glitch DAC? precision reference? closed-loop control applications?

TI's DAC8560 ultralow-glitch DAC

Texas Instruments Inc. has introduced the first product in a new series of precision DACs with an integrated precision reference. The DAC8560 is a 16bit, single-channel DAC featuring ultralow glitch (0.15nV-s), ultralow power (1.5mW at 2.7V) and an internal reference with 2ppm/C temperature drift and 0.004 percent initial accuracy. The combination of a precision DAC and outstanding reference performance makes the DAC8560 a flexible, easy-to-use solution for closed-loop control applications found in portable instrumentation, optical networking, industrial process control, machine and motion control and DAQ systems.

The DAC8560 builds upon TI's recently released DAC855x series offering breakthrough performance while minimizing code-to-code output transient voltages (glitch). The low-glitch performance solves the common DAC problem of unwanted transient voltages that cause ringing in closed-loop systems and create harmonic distortion during waveform generation.

The device also incorporates a power-on-reset circuit that ensures the DAC output powers up at zero-scale and remains there until a valid code is written to the device. A power-down feature, accessed over the serial interface, reduces the current consumption to 1.2?A at 5V.

Other features include 4LSB typical integral nonlinearity (INL), 0.5LSB typical differential nonlinearity (DNL), 8?s typical settling time to 0.003 percent full-scale range and 16bit monotonicity over temperature range.

The DAC8560 is well-suited to work with TI's MSP430 ultralow-power MCUs, TMS320C2000 digital signal controllers and high-performance analog portfolio to provide a complete system solution.

The DAC8560 is already available in an MSOP-8 package from TI and its authorized distributors. Pricing starts at $3.50 in 1,000-piece quantities. Evaluation modules (EVMs) are also available. The new 16bit value performance offering also includes the DAC8550, DAC8551, DAC8552, DAC8554 and DAC8555 products.

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