User's Manual

Page 34
BitaTek Co., Ltd. Copyright protected. All rights reserved.
NO. 115 Wugong 3rd Rd., Tel [phone]
Wugu Dist., New Taipei City 248, Taiwan (R.O.C.) Fax[phone]
3.5.5. Coin-cell charging
Parameter
Condition
Min
Typ
Max
Unit
Target regulator
voltage(*)
VIN > 3.3 V, ICHG = 100 µA
2.50
3.10
3.25
V
(*) Valid regulator voltage settings are 2.5, 3.0, 3.1, and 3.2 V.
3.5.6. Audio
All audio codec performance data are collected above Vbatt of 3.7 V, unless otherwise
specified.
Inputs and Tx processing
All Tx performance parameters are measured with a 1.02 kHz sine wave input signal,
capless differential or single-ended inputs, Fs = 48 kHz, 24-bit data, and MCLK = 9.6 MHz
or 12.288 MHz.
Parameter
Conditions
Min
Typ
Max
Units
Microphone amplifier gain = 0 dB (minimum gain)
Input referred noise
Analog input = -200 dBV,
A-weighted, bandwidth 20
Hz–20 kHz
-
19.0
25.1
µVrms
Signal-to-noise
ratio
Analog input = 0 dBV,
A-weighted, bandwidth 20
Hz–20 kHz
92.0
94.0
-
dB
Microphone amplifier gain = 24 dB (maximum gain)
Input referred noise
Analog input = -200 dBV,
A-weighted, bandwidth 20
Hz–20 kHz
-
2.7
4.2
µVrms
Signal-to-noise
ratio
Analog input = -24 dBV,
A-weighted, bandwidth 20
Hz–20 kHz
84.0
88.0
-
dB
General requirements
Power supply
rejection
100 mVpp sine wave
imposed on PMIC vph_pwr