Ds22192d page 7 mcp3901 1drclk dr tdodr tdrp sck sdo

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Unformatted text preview: LSB In SDO FIGURE 1-2: Serial Input Timing Diagram. 2011 Microchip Technology Inc. DS22192D-page 7 MCP3901 1/DRCLK DR tDODR tDRP SCK SDO FIGURE 1-3: H Data Ready Pulse Timing Diagram. Timing Waveform for tDO Timing Waveform for tDIS CS tDO VIH 90% SCK SDO SDO tDIS 10% HI-Z Timing Waveform for MDAT0/1 Modulator Output OSC1/CLKI tDOMDAT MDAT0/1 FIGURE 1-4: Specific Timing Diagrams. CLKEXT Digital Buffer 1 OSC1 0 OSC2 Crystal Oscillator Multiplexer PRESCALE<1:0> fS ADC Sampling Rate DMCLK OSR<1:0> fD ADC Output Data Rate 1/OSR DRCLK Clock Divider 1/ 1/Prescale MCLK AMCLK 1/4 Clock Divider Clock Divider FIGURE 1-5: MCP3901 Clock Detail. DS22192D-page 8 2011 Microchip Technology Inc. MCP3901 2.0 Note: TYPICAL PERFORMANCE CURVES The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore, outside the warranted range. Unless otherwise indicated, AVDD = 5.0V, DVDD = 5.0V; TA = +25C, MCLK = 4 MHz; PRESCALE = 1; OSR = 64; GAIN = 1; Dithering OFF; VIN = -0.5 dBFS @ 60 Hz. 0 -20 -40 -60 -80 -100 -120 -140 -160 -180 -200 0 500 1000 Frequency (Hz) Note: 0 -20 -40 -60 -80 -100 -120 -140 -160 -180 -200 0 500 1000 Amplitude (dB) 1500 2000 Amplitude (dB) fIN = -0.5dBFS @ 60 Hz fD = 3.9 ksps 16384 Point FFT OSR = 256 Dithering ON fIN = -60dBFS @ 60 Hz fD = 3.9 ksps 16384 Point FFT OSR = 256 Dithering OFF 1500 2000 Frequency (Hz) FIGURE 2-1: 0 -20 -40 -60 -80 -100 -120 -140 -160 -180 -200 0 500 Spectral Response. FIGURE 2-4: 0 -20 -40 -60 -80 -100 -120 -140 -160 -180 0 2000 Spectral Response. Amplitude (dB) Amplitude (dB) fIN = -60dBFS @ 60 Hz fD = 3.9 ksps 16384 Point FFT OSR = 256 Dithering ON fIN = -0.5dBFS @ 60 Hz fD = 15.6 ksps 16384 Point FFT OSR = 64 Dithering OFF 1000 Frequency (Hz) 1500 2000 4000 Frequency (Hz) 6000 8000 FIGURE 2-2: Spectral Response. FIGURE 2-5: Spectral Response. 0 -20 -40 -60 -80 -100 -120 -140 -160 -180 -200 0 500 1000 0 Amplitude (dB) fIN = -0.5dBFS @ 60 Hz fD = 3.9 ksps OSR = 256 16384 points Dithering OFF -20 -40 -60 -80 -100 -120 -140 -160 Amplitude (dB) fIN = -60dBFS @ 60 Hz fD = 15.6 ksps 16384 Point FFT OSR = 64 Dithering OFF 1500 2000 0 2000 4000 Frequency (Hz) 6000 8000 Frequency (Hz) FIGURE 2-3: Spectral Response. FIGURE 2-6: Spectral Response. 2011 Microchip Technology Inc. DS22192D-page 9 MCP3901 Note: Unless otherwise indicated, AVDD = 5.0V, DVDD = 5.0V; TA = +25C, MCLK = 4 MHz; PRESCALE = 1; OSR = 64; GAIN = 1; Dithering OFF; VIN = -0.5 dBFS @ 60 Hz. 120 110 100 90 80 70 60 50 40 30 20 10 0 32 0 -20 -40 -60 -80 -100 -120 -140 -160 -180 0 2000 4000 Spurious Free Dynamic Range (dB) Amplitude (dB) fIN = -0.5dBFS @ 60 Hz fD = 15.6 ksps 16384 Point FFT OSR = 64 Dithering ON Dithering ON Dithering OFF 6000 8000 64 128 256 Frequency (Hz) Oversampling Ratio (OSR) FIGURE 2-7: Spectral Response. FIGURE 2-10: Spurious Free Dynamic Range vs. Oversampling Ratio. 100 95 90 85 80 75 70 65 60 55 50 16 15 14 Dithering OFF 0 -20 -40 -60 -80 -100 -120 -140 -160 -180 -200 0 2000 4000 13 12 11 Dithering ON 10 9 8 6000 8000 32 64 128 256 Frequency (Hz) Oversampling Ratio (OSR) FIGURE 2-8: Spectral Response. FIGURE 2-11: Signal-to-Noise and Distortion and Effective Number of Bits vs. Oversampling Ratio. 95 90 85 80 75 70 65 60 55 50 45 40 1 2 1 Frequency of Occurance 0 1 6 SINAD (dB) 8 fIN = 60 Hz MCLK = 4 MHz OSR = 256 Dithering On OSR = 256 (Dithering ON) OSR = 128 (Dithering ON) 4 OSR = 32 OSR = 64 2 0 107 107.5 108 108.5 109 109.5 110 110.5 111 Spurious Free Dynamic Range (dB) 2 4 8 16 32 Gain (V/V) FIGURE 2-9: Spurious Free Dynamic Range Histogram. FIGURE 2-12: Signal-to-Noise and Distortion vs. Gain. DS22192D-page 10 2011 Microchip Technology Inc. Effective Number of Bits Amplitude (dB) SINAD (dB) fIN = -60dBFS @ 60 Hz fD = 15.6 ksps 16384 Point FFT OSR = 64 Dithering ON MCP3901 Note: Unless otherwise indicated, AVDD = 5.0V, DVDD = 5.0V; TA = +25C, MCLK = 4 MHz; PRESCALE = 1; OSR = 64; GAIN = 1; Dithering OFF; VIN = -0.5 dBFS @ 60 Hz. 14 OSR = 256 OSR = 128 95 90 85 80 75 70 65 60 55 50 45 40 1 OSR = 64 OSR = 32 2 4 8 16 32 Frequency of Occurance 12 10 8 6 4 2 0 SINAD (dB) fIN = 60 Hz MCLK = 4 MHz OSR = 256 Dithering On Gain (V/V) -105.0 -104.5 -104.0 -103.5 -103.0 -102.5 -102.0 Total Harmonic Distortion (dBc) FIGURE 2-13: Signal-to-Noise and Distortion vs. Gain (Dithering On). FIGURE 2-16: Total Harmonic Distortion Histogram (Dithering On). 0 -20 -40 -60 -80 -100 -120 -50 -25 0 25 50 75 100 125 150 Temperature (C) Total Harmonic Distortion (dBc) -20 -40 -60 -80 Dithering OFF -100 Dithering ON -120 32 64 128 256 Oversampling Ratio (OSR) FIGURE 2-14: Total Harmonic Distortion vs. Oversampling Ratio. FIGURE 2-17: vs. Temperature. Total Harmonic Distortion (dBc) 0 Total Harmonic Dist...
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This note was uploaded on 04/17/2013 for the course EEC 193 taught by Professor Kevin during the Spring '13 term at UC Davis.

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