參數(shù)資料
型號(hào): TLV320AIC26IRHBG4
廠商: Texas Instruments, Inc.
元件分類: Codec
英文描述: LOW POWER STEREO AUDIO CODEC WITH HEADPHONE/SPEAKER AMPLIFIER AND 12-BIT BATTERY / TEMPERATURE / AUXILIARY ADC
中文描述: 低功耗立體聲音頻編解碼器耳機(jī)/揚(yáng)聲器放大器和12位電池/溫度/輔助ADC
文件頁(yè)數(shù): 25/74頁(yè)
文件大?。?/td> 896K
代理商: TLV320AIC26IRHBG4
TLV320AIC26
SLAS412 DECEMBER 2003
www.ti.com
31
1500
1700
1900
2100
2300
2500
2700
40
20
0
20
40
60
80
ADC
Code
Temperature
°C
Figure 26. Typical Plot for Single Measurement Method
Differential
Code
300
350
400
450
500
40
20
0
20
40
60
80
Temperature
°C
Figure 27. Typical Plot for Differential Measurement Method
Battery Measurement
An added feature of the ’AIC26 is the ability to monitor the battery voltage on the other side of a voltage regulator (dc/dc
converter), as shown in Figure 28. The battery voltage can vary from 0.5 V to 6 V while maintaining the analog supply
voltage to the ’AIC26 in the range of 2.7 V to 3.6 V. The input voltage (VBAT1 or VBAT2) is divided by a factor of 6 so that
a 6.0-V battery voltage is represented as 1.0 V to the ADC. In order to minimize the power consumption, the divider is only
on during the sampling of the battery input. If the battery conversion results in a ADC output code of B, the voltage at the
battery pin can be calculated as
Vbat = (B/2N) x 6 x Vref
where N is the programmed resolution of ADC and Vref the programmed value of internal reference or the applied external
reference.
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