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SLAS366 数据表(PDF) 39 Page - Texas Instruments |
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SLAS366 数据表(HTML) 39 Page - Texas Instruments |
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39 / 56 page ![]() 5–3 5.5 ADC Dynamic Performance, fs = 8 kHz 5.5.1 ADC Signal-to-Noise (see Note 3) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SNR Signal to noise ratio (SNR) VI = –1 dB 82 88 dB SNR Signal-to-noise ratio (SNR) VI = –9 dB 79 82 dB NOTE 3: Test condition is a 1020-Hz input signal with an 8-kHz conversion rate. Input and output common mode is 1.35 V. 5.5.2 ADC Signal-to-Distortion (see Note 3) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT THD Total harmonic distortion VI = –1 dB 85 90 dB THD Total harmonic distortion VI = –9 dB 82 88 dB NOTE 3: Test condition is a 1020-Hz input signal with an 8-kHz conversion rate. Input and output common mode is 1.35 V. 5.5.3 ADC Signal-to-Distortion + Noise (see Note 3) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Signal to total harmonic distortion + noise (THD + N) VI = –1 dB 79 87 dB Signal-to-total harmonic distortion + noise (THD + N) VI = –9 dB 73 79 dB NOTE 3: Test condition is a 1020-Hz input signal with an 8-kHz conversion rate. Input and output common mode is 1.35 V. 5.5.4 ADC Channel Characteristics PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VI(PP) Single–ended input level Preamp gain = 6 dB 2 V VIO Input offset voltage MICIN INPx INMx ±10 mV IB Input bias current MICIN, INPx, INMx 34 µA Common-mode voltage 1.35 V Dynamic range VI = –1 dB 85 dB Mute attenuation PGA = MUTE 80 dB Intrachannel isolation 87 dB EG Gain error VI = –1 dB at 1020 Hz 0.6 dB EO(ADC) ADC converter offset error ±10 mV CMRR Common-mode rejection ratio at INMx and INPx VI = –100 mVpp at 1020 Hz 50 dB Idle channel noise VINP,INM,MICIN = 0 V 50 100 µVrns ri Input resistance MICIN INPx INMx T 25 °C 30 k Ω Ci Input capacitance MICIN, INPx, INMx, TA = 25°C 2 pF Channel delay IIR 5/fs s Channel delay FIR 17/fs s |
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