參數(shù)資料
型號(hào): XE3005I033TRLF
廠商: Semtech
文件頁(yè)數(shù): 2/37頁(yè)
文件大?。?/td> 0K
描述: IC CODEC LOW PWR 16BIT 20-TSSOP
標(biāo)準(zhǔn)包裝: 1
類(lèi)型: 音頻編解碼器
數(shù)據(jù)接口: 串行
分辨率(位): 16 b
ADC / DAC 數(shù)量: 1 / 1
三角積分調(diào)變:
S/N 比,標(biāo)準(zhǔn) ADC / DAC (db): 78 / 78
動(dòng)態(tài)范圍,標(biāo)準(zhǔn) ADC / DAC (db): 78 / 78
電壓 - 電源,模擬: 1.8 V ~ 3.6 V
電壓 - 電源,數(shù)字: 1.8 V ~ 3.6 V
工作溫度: -20°C ~ 70°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 20-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 20-TSSOP
包裝: 標(biāo)準(zhǔn)包裝
產(chǎn)品目錄頁(yè)面: 585 (CN2011-ZH PDF)
其它名稱(chēng): XE3005I033DKR
Semtech 2005
www.semtech.com
10
XE3005/XE3006
2.1.9
Sandman DAC Function
The Sandman function monitors the signals, which are processed in the ADC signal, channel and the DAC signal
channel. The logic output signal SMDA indicates whether the DAC signal channel processes an audio signal or only
noise, and this for certain duration. The reference signal amplitude can be selected through register P, the time window
parameters are the off time and on time (registers L, M and N).
Serial Audio
Interface
BCLK
FSYNC
SDI
PWM
DAC
Power
amplifier
AOUTP
AOUTN
VDDPA
VSSPA
SMDA
Sandman
Interface
Reg I, bit 4
Figure 9: Implementation of the Sandman function for the DAC (SMDA)
The logic output SMDA can be employed to power-down other devices in the application, such as an external audio
power amplifier. By setting bit 4 in register I, the on-chip DAC signal channel can be powered-down through SMDA too.
The Sandman function is illustrated in Figure 9 and is valid for both SMAD (related to the ADC signal) and SMDA
(related to the DAC signal).
off-time
on-time
AIN/SDO
(AOUT/SDI)
SMAD
(SMDA)
On-time counter
Off-time counter
+ reference
- reference
Time step = 1/fs = 1/FSYNC
12
9
38
7
6
45
10 time
Figure 10: Illustration of the Sandman function.
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