參數(shù)資料
型號： TLV320AIC29IRGZ
廠商： Texas Instruments, Inc.
元件分類： Codec
英文描述： STWREO AUDIO CODEC WITH INTERGRATED HEADPHONE AND SPEAKER AMPLIFIERS
中文描述： STWREO音頻編解碼器集成耳機和音箱放大器
文件頁數(shù)： 39/85頁
文件大小： 1007K
代理商： TLV320AIC29IRGZ
SLAS494A DECEMBER 2005 REVISED JANUARY 2006
www.ti.com
39
ADC
VBAT
8 k
2 k
R
LDO or DC-DC
Converter
3.0 V to 3.6 V
VDD
+
Battery
0.5 to 6 V
Figure 29. Battery Measurement Functional Block Diagram
See the section
Conversion Time Calculation for the AIC29
in this data sheet for timing diagrams and
conversion time calculations.
For increased protection and robustness, TI recommends a minimum 100
resistor be added in series
between the system battery and the VBAT pin. The 100-
resistor will cause an approximately 1% gain change
in the battery voltage measurement, which can easily be corrected in software when the battery conversion data
is read by the operating system.
Auxiliary Measurement
The auxiliary voltage inputs (AUX1 and AUX2) can be measured in much the same way as the battery inputs
except the difference that input voltage is not divided. Applications might include external temperature sensing,
ambient light monitoring for controlling the backlight, or sensing the current drawn from the battery. The auxiliary
input can also be monitored continuously in scan mode.
The AIC29 provides feature to measure resistance using auxiliary inputs. It has two modes of operation: (1)
External bias resistance measurement (2) Internal bias resistance measurement. Internal bias resistance
measurement mode does not need an external bias resistance of 50 k
, but provides less accuracy because
of on chip resistance variation, which is typically
±
20%. Figure 30 shows connection diagram for resistance
measurement mode on AUX1.
AUX1
R
SAR
VREF
a. Internal bias, Resistance Measurement
Vsar
SAR
VREF
b. External bias, Resistance Measurement
Vsar
AUX1
R
50 k
50 k
50 k
Figure 30. Connection DIagram for Resistance Measurement
Resistance can be calculated using following formula:
R
50 K
Vsar
VREF
Vsar
Where:
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TLV320AIC29IRGZR 功能描述:接口—CODEC Stereo Codec RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
TLV320AIC29IRGZRG4 功能描述:接口—CODEC Stereo Codec RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
TLV320AIC29IRGZT 功能描述:接口—CODEC Stereo Codec RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
TLV320AIC29IRGZTG4 功能描述:接口—CODEC Stereo Codec RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
TLV320AIC3004IRHBR 制造商:Texas Instruments 功能描述:TISTLV320AIC3004IRHBR LOW-POWER STEREO
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