User Manual

BM23SPKA1NB9
Version: 0.94 - 18 - 22/9/2014
Table 6: Audio codec ADC
Conditions
Min
Typ
Max
Unit
Temperature
-40
25
85
℃
Resolution
16
Bits
Input sample rate, F
sample
8KHz for MIC
44.1KHz for Line-in
8
44.1
KHz
Signal to Noise Ratio
(SNR @MIC or Line-in
mode)
f
in
=1KHz
B/W=20~20KHz
A-weighted
THD+N < 1%
150mVpp input
8KHz
90
dB
44.1KHz
90
Digital Gain
-54
4.85
dB
Digital Gain Resolution
2~6
dB
MIC Boost Gain
20
Analog Gain
60
dB
Analog Gain Resolution
2.0
dB
Input full-scale at maximum
gain (differential)
4
mV rms
Input full-scale at minimum
gain (differential)
800
mV rms
3dB bandwidth
20
KHz
Microphone mode
input impedance
Input impedance
6
10
KΩ
Input capacitance
20
pF
THD+N (microphone input)
@30mVrms input
0.02
%
THD+N (line input)
0.04
%
ADC channels
2
Analog supply voltage
2.6
2.8
3.0
V
Digital supply voltage
1.08
1.2
1.32
V