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ADC3421 数据表(PDF) 8 Page - Texas Instruments |
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ADC3421 数据表(HTML) 8 Page - Texas Instruments |
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8 / 80 page  ADC3421, ADC3422, ADC3423, ADC3424 SBAS673A – JULY 2014 – REVISED OCTOBER 2015 www.ti.com 7.8 AC Performance: ADC3421 Typical values are over the operating free-air temperature range, at TA = 25°C, full temperature range is TMIN = –40°C to TMAX = 85°C, ADC sampling rate = 25 MSPS, 50% clock duty cycle, AVDD = DVDD = 1.8 V, and –1-dBFS differential input, unless otherwise noted. ADC3421 (fS = 25 MSPS) DITHER ON DITHER OFF PARAMETER TEST CONDITIONS MIN TYP MAX MIN TYP MAX UNIT fIN = 10 MHz 70.9 71.1 fIN = 20 MHz 68.9 70.7 70.9 fIN = 70 MHz 70.4 70.6 Signal-to-noise ratio dBFS (from 1-MHz offset) fIN = 100 MHz 70.3 70.5 fIN = 170 MHz 69.7 69.9 fIN = 230 MHz 68.9 69.1 SNR fIN = 10 MHz 70.2 70.5 fIN = 20 MHz 70.1 70.3 fIN = 70 MHz 69.8 70.0 Signal-to-noise ratio dBFS (full Nyquist band) fIN = 100 MHz 69.6 69.8 fIN = 170 MHz 69.2 69.3 fIN = 230 MHz 68.3 68.5 fIN = 10 MHz –141.5 –141.7 fIN = 20 MHz –141.3 –139.5 –141.5 fIN = 70 MHz –141.0 –141.2 Noise spectral density NSD(1) dBFS/Hz (averaged across Nyquist zone) fIN = 100 MHz –140.9 –141.1 fIN = 170 MHz –140.3 –140.5 fIN = 230 MHz –139.5 –139.7 fIN = 10 MHz 71 71.1 fIN = 20 MHz 67.9 70.8 70.9 fIN = 70 MHz 69.5 70 Signal-to-noise and distortion SINAD(1) dBFS ratio fIN = 100 MHz 70.5 70.7 fIN = 170 MHz 69.6 69.8 fIN = 230 MHz 68.7 68.7 fIN = 10 MHz 11.5 11.5 fIN = 20 MHz 11 11.4 11.4 fIN = 70 MHz 11.4 11.4 ENOB(1) Effective number of bits Bits fIN = 100 MHz 11.4 11.4 fIN = 170 MHz 11.3 11.3 fIN = 230 MHz 11.1 11.1 fIN = 10 MHz 93 90 fIN = 20 MHz 84 91 85 fIN = 70 MHz 93 88 SFDR Spurious-free dynamic range dBc fIN = 100 MHz 85 82 fIN = 170 MHz 86 85 fIN = 230 MHz 82 82 (1) Reported from a 1-MHz offset. 8 Submit Documentation Feedback Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: ADC3421 ADC3422 ADC3423 ADC3424 |
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