Low-power DDS ICs

25 May 2011 Analogue, Mixed Signal, LSI

Analog Devices has introduced direct digital synthesis (DDS) ICs that offer low power consumption and small footprint while operating over the extended temperature range of 40°C to 125°C. The AD9838 and AD9837 consume as little as 11 mW when operating from clock rates up to 16 MHz, and are well suited for industrial and communications applications, including sensory excitation, impedance spectroscopy and battery-enabled diagnostic and communication equipment.

The devices settle in nanoseconds with granularity well below 100 MHz. Along with an on-chip, 10-bit DAC (digital-to-analog converter), they offer 28-bit fine-tuning granularity and high SFDR (spurious-free dynamic range) performance that enable them to quickly and accurately generate a stable signal in the band of interest.

The small package size of the AD9838 (4 x 4 mm) and AD9837 (3 x 3 mm) allows developers to reduce the footprint of their designs or increase sensor-node density to enable the development of feature-rich applications within the same form factor. Their low-power performance enables engineers to generate high-performance sine, square and triangular outputs to meet the low-power consumption targets of battery operated equipment or include advanced features within existing power budgets.

Integration of various communication and modulation features enables the devices to support single-tone, 2FSK, 2PSK, QPSK, sweep capability and amplitude modulation. High spectral performance (greater than 68 dB wideband SFDR) enables product developers to keep pace with evolving needs in instrumentation and communication equipment.

For more information contact Stella Homan, Avnet Kopp, +27 (0)11 809 6100, [email protected], www.avnet.co.za

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