參數(shù)資料
型號: AK4650
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC
中文描述: 16位ツヒ編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù): 48/86頁
文件大小: 824K
代理商: AK4650
[AK4650]
MS0502-E-01
2007/04
- 48 -
Voltage Reference (VREF)
The AK4650 has an internal 2.5V voltage reference. This reference can be turned ON when PMVREF = “1”, and OFF
when PMVREF = “0”. This reference is used in the single-ended mode for the battery monitoring, or for auxiliary input.
A 0.1
μ
F or larger capacitor should be connected for stable operation of the VREF circuit. Settling time depends on this
external capacitance, but 400
μ
s or longer time is required if the external capacitance is 0.1
μ
F.
If an external voltage reference is used, PMVREF bit should be set to “0”.
Battery Measurement
The AK4650 can measure the battery voltage of 5V or less directly while the AK4650 operates at 2.7V to 3.6V. The input
voltage is internally divided down by four.
When the tracking time is adjusted at battery measurement, the method using ADEXE pin is available. ADEXE1-0 bits
select the tracking edge (Table 53).
R1=7.5K
R2=2.5K
VBAT
ADC
Enable
R0
AIN+
AIN-
VREF+
VREF-
Internal
VREF
PD1
AK4650
VREF
Figure 36. Battery Monitoring
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4650VG 制造商:AKM 制造商全稱:AKM 功能描述:16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC
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AK4664VQ 功能描述:IC CODEC STEREO 20BIT LQFP 制造商:akm semiconductor inc. 系列:* 零件狀態(tài):上次購買時間 標(biāo)準(zhǔn)包裝:1,000
AK4665A 制造商:AKM 制造商全稱:AKM 功能描述:20-Bit Stereo CODEC with MIC/HP-AMP