ADI introduces quad-channel 12-bit and single-channel 14-bit D/A converters
Dec 20, 2012 (Datamonitor via COMTEX) --
Analog Devices, Inc., or ADI, 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, or SRAM, and direct digital synthesis, or 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 company said.
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, the company added.
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 company concluded.
AD9106/AD9102 D/A Converters Waveform Generator features; on-chip 4,096-word pattern memory; on-chip DDS with 24-bit tuning word; sleep mode power: < 5 mW @ 3.3 V; supply voltage of 1.8 V to 3.3 V; SFDR to Nyquist of 86 dBc @ 1 MHz output and 85 dBc @ 10 MHz output; -140 dBc/Hz @ 1 kHz offset, 180 MSPS, 8 mA phase noise; and differential current outputs of 8 mA max @ 3.3 V.
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