VV6501 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'VV6501' PDF : 60 Pages View PDF
Functional Description
VV6501
3.2 Audio block
The audio amplifier is designed to drive an external ADC, possibly in the co-processor, with an
amplified audio signal taken from a FET microphone input. The 3-bit gain control and power down
for the reference are controlled via the I2C interface.
Figure 17: VV6501 audio amplifier overview
Power management
AUD3V3
Digital block
AUDGAIN[2:0]
pdaudref
Audio amplifier
Audio
+
x1
x1
Bandgap -
+
-
AUDOUTP
-
+
AUDOUTN
AUDREF MICBIAS
micro
MICIN
3.2.1
Co-processor support for audio
Table 8 below summarizes the audio capability of the different co-processors the VV6501 is
intended to work with.
Table 8: Co-processor support for audio
Co-processor
Audio support
Comment
STV0676
Audio 8-b digital endpoint
External ADC needed
STV0674
16 bit Sigma-Delta
501 audio output is directly AC coupled to STV0674
differential audio inputs.
STV0674 includes digital ALC and noise gate
STV0680/1
Successive approximation ADC Low quality audio recording support
22/60
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