參數(shù)資料
型號: AK4648EC
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: Stereo CODEC with MIC/HP/SPK-AMP
中文描述: 立體聲編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù): 38/119頁
文件大?。?/td> 1272K
代理商: AK4648EC
[AK4648]
MS0625-E-01
2007/06
- 38 -
EXT Master Mode (PMPLL bit = “0”, M/S bit = “1”)
The AK4648 becomes EXT Master Mode by setting PMPLL bit = “0” and M/S bit = “1”. Master clock is input from
MCKI pin, the internal PLL circuit is not operated. The clock required to operate is MCKI (256fs, 512fs or 1024fs). The
input frequency of MCKI is selected by FS1-0 bits ((x: Don’t care)
Table 14).
Mode
FS3-2 bits
FS1 bit
FS0 bit
MCKI Input
Frequency
256fs
1024fs
256fs
512fs
Sampling Frequency
Range
7.35kHz
48kHz
7.35kHz
13kHz
7.35kHz
48kHz
7.35kHz
26kHz
(x: Don’t care)
0
1
2
3
x
x
x
x
0
0
1
1
0
1
0
1
(default)
Table 14. MCKI Frequency at EXT Master Mode (PMPLL bit = “0”, M/S bit = “1”)
The S/N of the DAC at low sampling frequencies is worse than at high sampling frequencies due to out-of-band noise.
The out-of-band noise can be improved by using higher frequency of the master clock. The S/N of the DAC output
through LOUT/ROUT pins at fs=8kHz is shown in Table 15.
MCKI
S/N
(fs=8kHz, 20kHzLPF + A-weighted)
83dB
93dB
93dB
256fs
512fs
1024fs
Table 15. Relationship between MCKI and S/N of LOUT/ROUT pins
MCKI should always be present whenever the ADC or DAC is in operation (PMADL bit = “1”, PMADR bit = “1” or
PMDAC bit = “1”). If MCKI is not provided, the AK4648 may draw excess current and it is not possible to operate
properly because utilizes dynamic refreshed logic internally. If MCKI is not present, the ADC and DAC should be in the
power-down mode (PMADL=PMADR=PMDAC bits = “0”).
AK4648
DSP or
μ
P
MCKI
BICK
LRCK
SDTO
SDTI
BCLK
LRCK
SDTI
SDTO
MCKO
1fs
32fs or 64fs
MCLK
256fs, 512fs or 1024fs
Figure 23. EXT Master Mode
BCKO bit
BICK Output
Frequency
32fs
64fs
0
1
(default)
Table 16. BICK Output Frequency at Master Mode
相關(guān)PDF資料
PDF描述
AK4650 16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC
AK4650VG 16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC
AK4651 16Bit ツヒ CODEC with MIC/HP/SPK-AMP
AK4651VG 16Bit ツヒ CODEC with MIC/HP/SPK-AMP
AK4665A 20-Bit Stereo CODEC with MIC/HP-AMP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4649 制造商:AKM 制造商全稱:AKM 功能描述:24bit Stereo CODEC with MIC/SPK-AMP
AK4649ECB 制造商:AKM 制造商全稱:AKM 功能描述:24bit Stereo CODEC with MIC/SPK-AMP
AK4649VN 功能描述:IC CODEC AUDIO 32QFN 制造商:akm semiconductor inc. 系列:- 包裝:帶卷(TR) 零件狀態(tài):初步 類型:音頻 數(shù)據(jù)接口:I2C 分辨率(位):24 b ADC/DAC 數(shù):1 / 1 三角積分:- 信噪比,ADC/DAC(db)(典型值):- 動態(tài)范圍,ADC/DAC(db)(典型值):- 電壓 - 電源,模擬:3 V ~ 3.6 V 電壓 - 電源,數(shù)字:3 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:32-WFQFN 裸露焊盤 供應(yīng)商器件封裝:32-QFN(5x5) 標(biāo)準(zhǔn)包裝:1,000
AK4650 制造商:AKM 制造商全稱:AKM 功能描述:16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC
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