Specifications

Document Number: 002-28015 Rev. ** Page 25 of 42
PRELIMINARY
CYBT-243053-02
Input impedance R
IN
For audio application 10 – –
K
For static measurement 500 – –
Startup time –
For audio application – 10 – ms
For static measurement – 20 – µs
MIC PGA Specifications
MIC PGA gain range – – 0 – 42 dB
MIC PGA gain step – – – 1 – dB
PGA input referred noise – At 42 dB PGA gain A-weighted – – 4 µV
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
[5]
–
Resistance – – 1 k
Capacitance – – 10 pF
Note
5. Conditional requirement for the measurement time of 10 s. Relaxed with longer measurement time for each GPIO input channel.
Table 19. Electrical Characteristics (continued)
Parameter Symbol Conditions/Comments Min Typ Max Unit