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AFE4403 Datasheet(PDF) 16 Page - Texas Instruments |
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AFE4403 Datasheet(HTML) 16 Page - Texas Instruments |
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16 / 97 page  96 100 104 108 112 0 250 500 750 1000 1250 PRF (Hz) C017 0 5 10 15 20 25 0 250 500 750 1000 1250 PRF (Hz) C016 92 96 100 104 108 112 116 0 5 10 15 20 25 Duty Cycle (%) PRF = 62.5 Hz PRF = 100 Hz PRF = 500 Hz PRF = 1000 Hz PRF = 2000 Hz C015 0 5 10 15 20 25 30 0 5 10 15 20 25 Duty Cycle (%) PRF = 62.5 Hz PRF = 100 Hz PRF = 500 Hz PRF = 1000 Hz PRF = 2000 Hz C014 86 90 94 98 102 0 5 10 15 20 25 Duty Cycle (%) ADC Averaging = 1 ADC Averaging = 2 ADC Averaging = 4 ADC Averaging = 8 ADC Averaging = 16 C013 0 10 20 30 40 0 5 10 15 20 25 Duty Cycle (%) ADC Averaging = 1 ADC Averaging = 2 ADC Averaging = 4 ADC Averaging = 8 ADC Averaging = 16 C012 AFE4403 SBAS650B – MAY 2014 – REVISED JULY 2014 www.ti.com Typical Characteristics (continued) At PRF = 100 Hz, 25% duty cycle, RF = 500 kΩ, CF is adjusted to keep TIA time constant at 1/10th of sampling duration, All supplies at 3.3 V, 8-MHz external clock, CLKOUT tri-state, 1-µF capacitor on TX_REF and BG pins, detector CIN = 50 pF, TX_REF = 0.5 V, ADC averaging = max allowed, and SNR in dBFS is noise referred to full-scale range of 2 V, unless otherwise noted. Figure 17. Receiver SNR over Nyquist Bandwidth vs Figure 18. Receiver Input-Referred Noise Current over Nyquist Bandwidth vs Duty Cycle (Different ADC Averaging) Duty Cycle (Different ADC Averaging) Figure 19. Receiver SNR in 20-Hz BW vs Duty Cycle Figure 20. Receiver Input Referred Noise in 20-Hz BW vs (Different PRFs) Duty Cycle (Different PRFs) Active window = 500 µs LED pulse = 100 µs Active window = 500 µs LED pulse = 100 µs All four DYNAMIC bits set to 1 All four DYNAMIC bits set to 1 Figure 21. Receiver SNR in 20-Hz BW in Dynamic Figure 22. Receiver Input-Referred Noise in 20-Hz BW in Dynamic Power-Down Mode vs PRF Power-Down Mode vs PRF 16 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Product Folder Links: AFE4403 |
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