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CS47L85 Datasheet(PDF) 17 Page - Cirrus Logic |
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CS47L85 Datasheet(HTML) 17 Page - Cirrus Logic |
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17 / 370 page  CS47L85 Rev 4.3 17 ELECTRICAL CHARACTERISTICS Test Conditions AVDD = 1.8V, With the exception of the condition(s) noted above, the following electrical characteristics are valid across the full range of recommended operating conditions. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Analogue Input Signal Level (IN1AL, IN1BL, IN1R, IN2AL, IN2BL, IN2AR, IN2BR, IN3L, IN3R) Full-scale input signal level (0dBFS output) VINFS Single-ended PGA input, 0dB PGA gain 0.5 -6 VRMS dBV Differential PGA input, 0dB PGA gain 1 0 VRMS dBV Notes: 1. The full-scale input signal level is also the maximum analogue input level, before clipping occurs. 2. The full-scale input signal level changes in proportion with AVDD. For differential input, it is calculated as AVDD / 1.8. 3. A 1.0VRMS differential signal equates to 0.5VRMS/-6dBV per input. 4. A sinusoidal input signal is assumed. Test Conditions TA = +25 ºC With the exception of the condition(s) noted above, the following electrical characteristics are valid across the full range of recommended operating conditions. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Analogue Input Pin Characteristics (IN1AL, IN1BL, IN1R, IN2AL, IN2BL, IN2AR, IN2BR, IN3L, IN3R) Input resistance RIN Single-ended PGA input, All PGA gain settings 9 12 k Differential PGA input, All PGA gain settings 18 24 Input capacitance CIN 5 pF Test Conditions The following electrical characteristics are valid across the full range of recommended operating conditions. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Input Programmable Gain Amplifiers (PGAs) Minimum programmable gain 0 dB Maximum programmable gain 31 dB Programmable gain step size Guaranteed monotonic 1 dB Test Conditions The following electrical characteristics are valid across the full range of recommended operating conditions. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Digital Microphone Input Signal Level (DMICDAT1, DMICDAT2, DMICDAT3, DMICDAT4, DMICDAT5, DMICDAT6) Full-scale input signal level (0dBFS signal to digital core) 0dB gain -6 dBFS Notes: 1. The digital microphone input signal level is measured in dBFS, where 0dBFS is a signal level equal to the full-scale range (FSR) of the PDM input. The FSR is defined as the amplitude of a 1kHz sine wave whose positive and negative peaks are represented by the maximum and minimum digital codes respectively - this is the largest 1kHz sine wave that will fit in the digital output range without clipping. |
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