Specifications

Document Number: 002-30672 Rev. ** Page 28 of 46
PRELIMINARY
CYBT-243068-02
CYBT-243069-02
MIC Bias Specifications
MIC bias output voltage – At 3-V supply, 25 °C, default settings – 2.4 – V
MIC bias loading current – – – – 3 mA
MIC bias noise –
Refers to PGA input 20 Hz to
8 kHz, A-weighted
––3µV
MIC bias PSRR – At 1 kHz 40 – – dB
ADC SNR –
A-weighted 0 dB PGA gain,
Temperature = 25 °C
–78–dB
ADC THD + N –
–3 dBFS input 0 dB PGA gain,
Temperature = 25 °C
–70–dB
GPIO input voltage Always lower than avddBAT – – 3.6 V
GPIO source impedance
[6]
–
Resistance – – 1 kΩ
Capacitance – – 10 pF
Note
6. Conditional requirement for the measurement time of 10 μs. Relaxed with longer measurement time for each GPIO input channel.
Table 20. Electrical Characteristics (continued)
Parameter Symbol Conditions/Comments Min Typ Max Unit