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AS3515 Datasheet(PDF) 18 Page - ams AG

Part # AS3515
Description  Stereo Audio Codec with System Power Management
PDF  67 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3515 Datasheet(HTML) 18 Page - ams AG

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AS3515 V15
austriamicrosystems
Data Sheet, Confidential
www.austriamicrosystems.com
Revision 3.1
17
- 66
6.4.5
Parameter
Table 15 Microphone Inputs Parameter
Symbol Parameter
Notes
Min
Typ
Max
Unit
A0
Gain
programmable gain
-40.5
6
dB
Ax
Gain Step-Size
1.5
dB
Gain Step-Precision
0.5
dB
RinMIC
Input Resistance
differential
15
kOhm
AMIC0
MicAmp_Gain0
28
dB
AMIC1
MicAmp_Gain1
34
dB
AMIC2
MicAmp_Gain2
40
dB
SoftClip_AGC_Range
15*2.0
dB
Attack_Time
60
us
Release_Time
120
ms
VInnom0
Nominal_Input_Voltage0
MicInGain = 0dB, MicAmp_Gain0
40
mVp
VInnom1
Nominal_Input_Voltage1
MicInGain = 0dB, MicAmp_Gain1
20
mVp
VInnom2
Nominal_Input_Voltage2
MicInGain = 0dB, MicAmp_Gain2
10
mVp
SNR
Signal to Noise Ratio
90
dB
Mute Attenuation
100
dB
Microphone Supply
VMICsup
Microphone Supply Voltage
0-2mA
2.95
V
IMIClim
Mic. Supply Current Limit
10
mA
IMICdet
Mic. Detection Current
50
uA
IREMdet
Remote Detection Current
500
uA
Vnoise
Voltage Noise
5.7
uV
BVDD = 3.3V, TA= 25oC unless otherwise mentioned
6.4.6
Register Description
Enabling a microphone input is done via a control bit in the audio settings register (AudioSet1 register 0x14h). To get an interrupt on an
microphone detection event, the corresponding bit in the IRQ_ENRD1 register (0x26h) has to be set, while a remote detection interrupt is
controlled via IRQ_ENRD2 register (0x27h). All other microphone input settings are controlled by the following registers.
Right Microphone Registers (06h & 08h)
Table 16 MIC1_R & MIC2_R Register
Bit
Name
Description
7
M1_AGC_off
M2_AGC_off
0: automatic gain control enabled
1: automatic gain control disabled
6,5
M1_Gain
M2_Gain
00: gain set to 28 dB
01: gain set to 34 dB
10: gain set to 40 dB
11: gain set to tbd.
4..0
M1R_VOL
M2R_VOL
volume settings for right microphone input, adjustable in 32 steps @ 1.5dB
11111: 6 dB gain
11110: 4.5 dB gain
..
00001: -39 dB gain
00000: -40.5 dB gain
The registers are R/W; default value is 00h



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