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BK3266TS28 Datasheet(PDF) 14 Page - Beken Corporation

Part # BK3266TS28
Description  Bluetooth Audio SoC
Download  28 Pages
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Manufacturer  BEKEN [Beken Corporation]
Direct Link  http://www.bekencorp.com/en
Logo BEKEN - Beken Corporation

BK3266TS28 Datasheet(HTML) 14 Page - Beken Corporation

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Low Power Bluetooth Audio SoC
v 0.5
© 2017 Beken Corporation
Proprietary and Confidential
Page 14 of 28
software configuration tool kit. For more information, please refer to the BK3266
Software Configuration Tool Users Guide.
3.5.2.
Stereo ADC and DAC
The BK3266 contains high fidelity 96 dB SNR stereo ADCs with sample rates of
8 kHz, 16 kHz, 44.1 kHz, or 48 kHz. The chip also integrates high fidelity 96 dB
SNR stereo DACs with sample rates of 8 kHz, 16 kHz, 44.1 kHz or 48 kHz.
3.5.3.
Microphone Input Amplifier and Bias
BK3266 contains a fully differential analog microphone input amplifier and a low-
noise microphone bias generator. Expensive external components are not
needed as the microphone amplifier and active bias circuitry are integrated into
the chip allowing the microphone to be interfaced with only cheap passive
resistors and capacitors.
The microphone signal can be amplified with gain from -8 ~ 38dB with 0.5 dB
step.
MIC
R3
2 k
C5
1uF
R4
2 k
C9
1uF
C6
1uF
MICRP
MICRN
MICREF
MIC
R4
3.9 k
C9
1uF
C6
1uF
MICRP
MICREF
Differential Mode
Single_End Mode
Figure 7. Microphone Interface
3.5.4.
Line-in Input
BK3266 includes stereo line-in inputs which connect to the stereo left and right
channel ADCs through a 0~6 dB amplifier with 2 dB step. The digitized line-in
inputs can be further processed with the 5-band equalizer prior to digital-to-
analog conversion.


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