参数资料
型号: AS3517
厂商: ams
文件页数: 50/94页
文件大小: 0K
描述: IC CODEC AFE AUDIO STER 81-CTBGA
标准包装: 250
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: 托盘
AS3517 V17
Data Sheet, Confidential
2003-2007, austriamicrosystems AG, 8141 Unterpremstaetten, Austria-Europe. All Rights Reserved.
www.austriamicrosystems.com
9.3.6
10-Bit ADC
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..
Input Sources
Table 42 ADC10 Input Sources
Nr.
Source
Range
LSB
Description
0
CHGOUT
5.120V
5mV
check battery voltage of 4V LiIo accumulator
1
BVDDR
5.120V
5mV
check RTC backup battery voltage (connected to BVDD inside the
package)
2
5.120V
5mV
Source defined by DC_TEST in register 0x18
3
CHGIN
5.120V
5mV
check charger input voltage
4
VBUS
5.120V
5mV
check USB input voltage
5
BatTemp
2.560V
2.5mV check battery charging temperature
6
MIC1S
2.560V
2.5mV check voltage on MIC1S for remote control or external voltage
measurement
7
MIC2S
2.560V
2.5mV check voltage on MIC1S for remote control or external voltage
measurement
8
VBE_1uA
1.024
1mV
measuring basis-emitter voltage of temperature sense transistor;
Tj = 0.5*[ADC_bit0:bit9] – 565/2
9
VBE_2uA
1.024
1mV
measuring basis-emitter voltage of temperature sense transistor;
Tj = 0.5*[ADC_bit0:bit9] – 575/2
10
I_MIC1S
1.024mA typ.
2.0uA check current of MIC1S for remote control detection
11
I_MIC2S
1.024mA typ.
2.0uA check current of MIC2S for remote control detection
12
RVDD
2.560V
2.5mV check RTC supply voltage
13..15
Reserved
1.024V
1mV
for testing purpose only
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%.
Parameter
Table 43 ADC10 Parameter
Symbol
Parameter
Min
Typ
Max
Unit
Notes
RDIV
Input Divider Resistance
138k
180k
234k
Ω
CHGOUT, BVDDR, VBUS, CHGIN
ADCFS
ADC Full Scale Range
2.534
2.56
2.586
V
Ratio1
Division Factor 1
0.198
0.2
0.202
1
CHGOUT, BVDDR, VBUS, CHGIN
Ratio2
Division Factor 2
0.396
0.4
0.404
1
RVDD, BATTEMP, MIC1S, MIC2S
Gain
ADC Gain Stage
2.475
2.5
2.525
V
TCON
Conversion Time
-
34
50
s
I_MICFS
I_MICS Full Scale Range
0.7
1.0
1.4
mA
BVDD=3.6V; Tamb=25C; unless otherwise specified
Register Description
Table 44 ADC10 Related Register
Name
Base
Offset
Description
ADC_0
2-wire serial
2Eh
ADC source selection, ADC result<9:8>
ADC_1
2 wire serial
2Fh
ADC result <7:0>
IRQ_ENRD_4
2-wire serial
27h
Interrupt settings for end of conversion interrupt
PMU_ENABLE
2-wire serial
18h
Extended ADC source selection
Revision 1v3
53
- 93
ams
AG
Technical
content
still
valid
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