Specifications

Document Number: 002-29354 Rev. ** Page 27 of 45
PRELIMINARY
CYBT-273063-02
CYBT-263064-02
CYBT-263065-02
Conversion rate – For audio application 8 16 – kHz
For static measurement 50 100 –
Signal bandwidth – For audio application 20 – 8K Hz
For static measurement – DC –
Input impedance R
IN
For audio application 10 – – KW
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
MIC PGA gain error – Includes part-to-part gain variation –1 – 1 dB
PGA input referred noise – At 42 dB PGA gain A-weighted – – 4 μV
Passband gain flatness – PGA and ADC, 100 Hz–4 kHz –0.5 – 0.5 dB
MIC Bias Specifications
MIC bias output voltage – At 2.5-V supply – 2.1 – 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 78 – – dB
ADC THD + N – –3 dBFS input 0 dB PGA gain 74 – – dB
GPIO input voltage Always lower than avddBAT – – 3.6 V
GPIO source impedance
[5]
– Resistance – – 1 kΩ
Capacitance – – 10 pF
Note
5. 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