austriamicrosystems Data Sheet, Confidential www.austriamicrosystems.com Revision 3.1 47 - 6" />
參數(shù)資料
型號: AS3515
廠商: ams
文件頁數(shù): 43/67頁
文件大?。?/td> 0K
描述: IC CODEC AFE AUDIO STER 64-CABGA
標準包裝: 476
類型: 音頻編解碼器
應用: 便攜式音頻,電話
安裝類型: 表面貼裝
封裝/外殼: 64-TFBGA
供應商設備封裝: 64-CTBGA(7x7)
包裝: 托盤
AS3515 V15
austriamicrosystems
Data Sheet, Confidential
www.austriamicrosystems.com
Revision 3.1
47
- 66
6.18 10-Bit ADC
6.18.1 General
This general purpose ADC can be used for measuring several voltages and currents to perform functions like battery monitor, temperature
supervision, button press detection, etc..
6.18.2 Input Sources
Table 50 ADC10 Input Sources
Nr.
Source
Range
LSB
Description
0
BVDD
5.120V
5mV
check battery voltage of 4V LiIo accumulator
1
RTCSUP
5.120V
5mV
check RTC backup battery voltage
2
UVDD
5.120V
5mV
check USB host voltage
3
CHG_IN
5.120V
5mV
check charger input voltage
4
CVDD
2.560V
2.5mV
check charge pump output voltage
5
BatTemp
2.560V
2.5mV
check battery charging temperature
6
MicSup1
2.560V
2.5mV
check voltage on MicSup1 for remote control or external voltage
measurement
7
MicSup2
2.560V
2.5mV
check voltage on MicSup2 for remote control or external voltage
measurement
8
VBE1
1.024
1mV
measuring junction temperature @ 2uA
9
VBE2
1.024
1mV
measuring junction temperature @ 1uA
10
I_MicSup1
2.048mA typ. 2.0uA
check current of MicSup1 for remote control detection
11
I_MicSup2
2.048mA typ. 2.0uA
check current of MicSup2 for remote control detection
12
VB1V
2.560V
2.5mV
check single cell battery voltage
13..15
Reserved
1.024V
1mV
for testing purpose only
BVDD, RTCSUP, UVDD, CHG_IN
These sources are fed into an 1/5 voltage divider (180k
Ω typ.) and further amplified by 2.5.
CVDD, BatTemp, MicSup1, MicSup2
These sources are fed directly to the ADC input multiplexer.
VBE1, VBE2
These inputs are first amplified by 2.5 and than fed to the ADC input multiplexer.
I_MicSup1, I_MicSup2
The measurement of the microphone supply LDOs is not very accurate, as the current-voltage conversion is only done by a single resistor
which shows wide process and temperature variations. These measurements should be only used for remote function detection.
VB1V
This source is divided by 2.5 with a voltage divider (180k
Ω typ.) and than amplified by 2.5. This has to be done, as VB1V can represent
voltages up to 3.6V. Please note, that the maximum measurement rage will be still 2.560V
6.18.3 Reference
AVDD=2.9V is used as reference to the ADC. AVDD is trimmed to +/-20mV with over all precision of +/-29mV. So the absolute accuracy is
+/-1%.
ams
AG
Technical
content
still
valid
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