Product category:
Analogue and Mixed Signal ICs
News Release from: National Semiconductor | Subject: ADC10D040, ADC12040 and ADC08200
Edited by the Electronicstalk Editorial
Team on 26 June 2001
A/D convertor trio boost speed while
cutting power
National Semiconductor has released a trio of low-power, high-speed ADCs it claims are ideal for communications and imaging applications.
National Semiconductor has released a trio of low-power, high-speed ADCs it claims are ideal for communications and imaging applications Leading the way is the ADC10D040, dubbed the industry's first dual-channel 10bit 40Msample/s ADC
This article was originally published on Electronicstalk on 5 Jan 2001 at 8.00am (UK)
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The dual-channel ADC10D040 provides single-channel performance while maximising channel isolation.
This device enables economical direct IF-sampling architectures and simplifies the system designs while reducing the number of necessary components.
Invariably today, digital communication systems require two ADCs to sample the in-phase (I) and quadrature (Q) signals.
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The ADC10D040, with greater than 75dB channel isolation, enables simultaneous sampling of the I and Q channels, and delivers 9.3 effective number of bits.
This high level of performance is achieved at a typical power consumption of only 210mW.
Applications for the ADC10D040 also include wireless LAN, set-top box and portable ultrasound equipment.
The ADC12040 is a monolithic 12bit CMOS ADC based on a differential, pipelined architecture with digital error correction and an on-chip sample-and-hold circuit to minimise die size and power consumption while providing superior dynamic performance at input frequencies well beyond half the sample rate.
Operating on a single 5V power supply, the ADC12040 consumes just 340mW at 40Msample/s.
The power down feature reduces power consumption to just 70mW.
The ADC12040 is optimised for medical ultrasound equipment.
The ADC08200 is National's latest low-power 8bit monolithic ADC with an on-chip track and hold.
This product extends its 8bit family to 230Msample/s and is the third product in the portfolio that can scale power to the clock frequency.
The ADC08200 delivers 7 effective number of bits at Nyquist input frequencies, and typically consumes only 210mW.
Applications for the ADC08200 include communications and satellite modems, projection systems, and graphics and video equipment.
National also offers an evaluation board and software that facilitates quick bench trials and simplifies final circuit design.
Using National's WaveVision software running under Microsoft Windows, designers can capture and display multiple waveform data from the ADC in graphical form from a menu-driven environment.
The software can also perform fast Fourier transform (FFT) calculations on the data to measure the dynamic performance of the ADC, displaying signal to noise ratio, signal to noise and distortion, total harmonic distortion, and spurious free dynamic range in addition to the spectral plot from the FFT.
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