Quad 12-bit and single 14-bit, 180-MSPS DACs simplify complex waveform generation functions

December 12, 2012 // By Paul Buckley
Analog Devices, Inc. has introduced the AD9106 quad-channel, 12-bit, and the AD9102 single-channel, 14-bit, 180-MSPS waveform generators, integrating on-chip static random access memory (SRAM) and direct digital synthesis (DDS) for complex waveform generation.

ADI’s new D/A converters generate the high-speed, high-dynamic-range, multichannel complex waveforms required in applications such as ultrasound transducer excitation, medical instrumentation, portable instrumentation, signal generators and arbitrary waveform generators.

The on-chip DDS operates up to 180 MHz with a 24-bit tuning word, allowing 10.8-Hz/LSB (least significant bit) frequency resolution and providing a single frequency output for all D/A converters and independent programmable phase-shift outputs for each D/A converter. Pattern data can include directly generated SRAM-stored waveforms, DDS outputs amplitude-modulated by SRAM, or DDS frequency tuning words from SRAM providing chirp or frequency shift keying (FSK) modulation. An internal pattern-control state machine allows the user to program the pattern period for all D/A converters, the start delay within the pattern period for the signal output on each D/A converter channel, as well as the repetition rate of the pattern. A serial peripheral interface (SPI) is used to configure the digital waveform generator and load patterns into the SRAM.

The AD9106/AD9102 D/A converters waveform generator feature an on-chip 4,096-word pattern memory as well as on-chip DDS with 24-bit tuning word.

The devices provide sleep mode power of < 5 mW @ 3.3 V.

The devices have a phase noise performance of −140 dBc/Hz @ 1 kHz offset, 180 MSPS, 8 mA while delivering differential current outputs of 8 mA max @ 3.3 V.

Availability and Pricing

Samples of the AD9106 packaged in a 32-lead 5x5mm LFCSP are available now and in production.  Pricing is $15.00 each in 1000 quantities.

Samples of the AD9102 packaged in a 32-lead 5x5mm LFCSP are available now and in production from January 2013.  Pricing is $ 12.35 each in 1000 quantities.

More information about the AD9106 and AD9102 D/A converter at
www.analog.com/AD9106 and www.analog.com/AD9102