参数资料
型号: AS3517-T
厂商: ams
文件页数: 13/94页
文件大小: 0K
描述: IC CODEC AFE AUDIO STER 81-CTBGA
标准包装: 2,000
类型: 音频编解码器
应用: 便携式音频,电话
安装类型: 表面贴装
封装/外壳: 81-TFBGA
供应商设备封装: 81-CTBGA(9x9)
包装: 带卷 (TR)
AS3517 V17
Data Sheet, Confidential
2003-2007, austriamicrosystems AG, 8141 Unterpremstaetten, Austria-Europe. All Rights Reserved.
www.austriamicrosystems.com
Parameter
Table 12 Microphone Inputs Parameter
Symbol
Parameter
Min
Typ
Max
Unit
Note
VMICIN0
40
mVPEAK
AMICPRE = 28dB; AMIC = 0dB
VMICIN1
20
mVPEAK
AMICPRE = 34dB; AMIC = 0dB
VMICIN2
Input Signal Level
10
mVPEAK
AMICPRE = 40dB; AMIC = 0dB
RMICIN
Input Impedance
15
k
MICP, MICN to AGND
ΔMICIN
Input Impedance Tolerance
±15
%
CMICIN
Input Capacitance
5
pF
AMICPRE
Microphone Preamplifier Gain
28
34
40
dB
Preamplifier has 3
selectable (fixed) gain
settings
AMIC
Programmable Gain
-40.5
+6
dB
Gain Steps
1.5
dB
discrete logarithmic gain
steps
Gain Step Precision
±0.25
dB
VMICLIMIT
Limiter Activation Level
1
VPEAK
AMICLIMIT
Limiter Gain Overdrive
15*2
dB
tATTACK
Limiter Attack Time
50
s/6dB
tDECAY
Limiter Decay Time
120
ms/6dB
AMICMUTE
Mute Attenuation
100
dB
VMICSUP
Microphone Supply Voltage
2.9
V
IMICMAX
Max. Microphone Supply
Current
10
mA
microphones nominally
need a bias current of
0.5mA-1mA
VNOISE
Microphone Supply Voltage
Noise
5
V
IMICDET
Microphone Detection
Current
50
A
IREMDET
Max. Remote Detection
Current
500
A
BVDD = 3.3V, TA= 25oC unless otherwise mentioned
Register Description
Table 13 Microphone Related Register
Name
Base
Offset
Description
MIC1_R
2-wire serial
06h
Right Microphone Input 1 volume settings, AGC control
MIC1_L
2-wire serial
07h
Left Microphone Input 1 volume settings, MIC 1 supply control
MIC2_R
2-wire serial
08h
Right Microphone Input 2 volume settings, AGC control
MIC2_L
2-wire serial
09h
Left Microphone Input 2 volume settings, MIC 2 supply control
AudioSet_1
2-wire serial
14h
Enable/disable driver stage
AudioSet_3
2-wire serial
16h
Enable/disable mixer input
IRQ_ENRD_1
2-wire serial
24h
Interrupt settings for microphone voice activation
IRQ_ENRD_3
2-wire serial
26h
Interrupt settings for microphone detection
IRQ_ENRD_4
2-wire serial
27h
Interrupt settings for remote button press detection
Microphone inputs have to be enabled in register 14h first before other settings in register 06h to 09h can be programmed.
Revision 1v3
19
- 93
ams
AG
Technical
content
still
valid
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