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AFE7901 数据表(PDF) 39 Page - Texas Instruments |
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AFE7901 数据表(HTML) 39 Page - Texas Instruments |
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39 / 160 page  7.12.1 RX Typical Characteristics 30 MHz and 400 MHz (continued) Typical values at TA = +25°C. Default conditions at 30MHz: ADC Sampling Rate = 1500 MSPS, output sample rate = 62.5 MSPS (decimate by 24x), PLL clock mode with fREF = 500 MHz, AIN = –3 dBFS, DSA setting = 3 dB. Default conditions at 400 MHz: ADC Sampling Rate = 1500 MSPS, output sample rate = 125 MSPS (decimate by 12x), PLL clock mode with fREF = 500 MHz, AIN = –3 dBFS, DSA setting = 3 dB. AIN = -60 dBFS, fADC = 1500 MSPS, fNCO = 32.13 MHz, Decimate by 24x Figure 7-19. RX Output FFT at 30 MHz Input Amplitude (dBFS) -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 -152 -151 -150 -149 -148 -147 -146 -145 -144 -143 -142 Temp = -40C, DSA = 0dB Temp = -40C, DSA = 3dB Temp = 25C, DSA = 0dB Temp = 25C, DSA = 3dB Temp = 110C, DSA = 0dB Temp = 110C, DSA = 3dB fADC = 1500 MSPS, fNCO = 32.13 MHz, Decimate by 24x Figure 7-20. NSD vs Input Amplitude at 30 MHz with DSA = 0 and 3dB Input Amplitude (dBFS) -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 -152.5 -152 -151.5 -151 -150.5 -150 -149.5 -149 -148.5 -148 -147.5 -147 Temp = -40C Temp = 25C Temp = 110C fADC = 1500 MSPS, fNCO = 32.13 MHz, Decimate by 24x Figure 7-21. NSD vs Input Amplitude at 30 MHz with DSA = 12 DSA Setting (dB) 0 5 10 15 20 25 -152 -150 -148 -146 -144 -142 AIN = -12dBFS, Temp = -40C AIN = -12dBFS, Temp = 25C AIN = -12dBFS, Temp = 110C AIN = -3dBFS, Temp = -40C AIN = -3dBFS, Temp = 25C AIN = -3dBFS, Temp = 110C fADC = 1500 MSPS, fNCO = 32.13 MHz, Decimate by 24x Figure 7-22. NSD vs DSA Attenuation at 30 MHz Input Amplitude (dBFS, per tone) -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 -85 DSA = 3dB, Temp = -40C DSA = 3dB, Temp = 25C DSA = 3dB, Temp = 110C DSA = 12dB, Temp = -40C DSA = 12dB, Temp = 25C DSA = 12dB, Temp = 110C fADC = 1500 MSPS, fNCO = 32.13 MHz, Decimate by 24x Figure 7-23. IMD3 vs Input Amplitude at 30 MHz DSA Setting (dB) 0 5 10 15 20 25 -110 -105 -100 -95 -90 -85 -80 -75 -70 -65 -60 AIN = -13dBFS, Temp = -40C AIN = -13dBFS, Temp = 25C AIN = -13dBFS, Temp = 110C AIN = -7dBFS, Temp = -40C AIN = -7dBFS, Temp = 25C AIN = -7dBFS, Temp = 110C fADC = 1500 MSPS, fNCO = 32.13 MHz, Decimate by 24x Figure 7-24. IMD3 vs DSA Setting at 30 MHz www.ti.com AFE7901 SBASAO5 – APRIL 2023 Copyright © 2023 Texas Instruments Incorporated Submit Document Feedback 39 Product Folder Links: AFE7901 |
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