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AD9101 Arkusz danych(PDF) 1 Page - Analog Devices |
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AD9101 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 12 page REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a 125 MSPS Monolithic Sampling Amplifier One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 FUNCTIONAL BLOCK DIAGRAM CLOCK CLOCK VIN CHOLD 4X AMP + RTN R 3R – + SAMPLER – AD9101 VOUT FEATURES 350 MHz Sampling Bandwidth 125 MHz Sampling Rate Excellent Hold Mode Distortion –75 dB @ 50 MSPS (25 MHz VIN) –57 dB @ 125 MSPS (50 MHz VIN) 7 ns Acquisition Time to 0.1% <1 ps Aperture Jitter 66 dB Feedthrough Rejection @ 50 MHz 3.3 nV/ √Hz Spectral Noise Density APPLICATIONS Direct IF Sampling Digital Sampling Oscilloscopes HDTV Cameras Peak Detectors Radar/EW/ECM Spectrum Analysis Test Equipment/CCD Testers DDS DAC Deglitcher GENERAL DESCRIPTION The AD9101 is an extremely accurate, general purpose, high speed sampling amplifier. Its fast and accurate acquisition speed allows for a wide range of frequency vs. resolution performance. The AD9101 is capable of 8 to 12 bits of accuracy at clock rates of 125 MSPS or 50 MSPS, respectively. This level of perfor- mance makes it an ideal driver for almost all 8- to 12-bit A/D encoders on the market today. In effect, the AD9101 is a track-and-hold with a post amplifier. This configuration allows the front end sampler to operate at relatively low signal amplitudes. This results in dramatic im- provement in both track and hold mode distortion while keeping power low. The gain-of-four output amplifier has been optimized for fast and accurate large signal step settling characteristics even when heavily loaded. This amplifier’s fast Settling Time Linearity (STL) characteristic causes the amplifier to be transparent to the low signal level distortion of the sampler. When sampled, output distortion levels reflect only the distortion performance of the sampler. Dramatic SNR and distortion improvements can be realized when using the AD9101 with high speed flash converters. Flash converters generally have excellent linearity at dc and low fre- quencies. However, as signal slew rate increases, their perfor- mance degrades due to the internal comparators’ aperture delay variations and finite gain bandwidth product. The benefits of using a track-and-hold ahead of a flash converter have been well known for many years. However, before the AD9101, there was no track-and-hold amplifier with sufficient bandwidth and linearity to markedly increase the dynamic per- formance of such flashes as the AD9002, AD9012, AD9020, and AD9060. A new application made possible by the AD9101 is direct IF- to-digital conversion. Utilizing the Nyquist principle, the IF frequency can be rejected, and the baseband signal can be recovered. As an example, a 40 MHz IF is modulated by a 10 MHz bandwidth signal. By sampling at 25 MSPS, the signal of interest is detected. The AD9101 is offered in commercial and military temperature ranges. Commercial versions include the AD9101AR in plastic SOIC and AD9101AE in ceramic LCC. Military devices are available in ceramic LCC. Contact the factory for availability of versions in DIP and/or military versions. PRODUCT HIGHLIGHTS 1. Guaranteed Hold-Mode Distortion 2. 125 MHz Sampling Rate to 8 Bits; 50 MHz to 12 Bits 3. 350 MHz Sampling Bandwidth 4. Super-Nyquist Sampling Capability 5. Output Offset Adjustable AD9101 |
Podobny numer części - AD9101 |
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Podobny opis - AD9101 |
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