參數(shù)資料
型號： ADAU1961WBCPZ-R7
廠商： Analog Devices Inc
文件頁數(shù)： 29/76頁
文件大?。?/td> 0K
描述： IC STEREO AUD CODEC LP 32LFCSP
標準包裝： 1,500
類型： 音頻編解碼器
數(shù)據(jù)接口： I²C，串行，SPI?
分辨率（位）： 24 b
ADC / DAC 數(shù)量： 2 / 2
三角積分調變： 無
S/N 比，標準 ADC / DAC (db)： 98 / 98
動態(tài)范圍，標準 ADC / DAC (db)： 96 / 98
電壓 - 電源，模擬： 2.97 V ~ 3.63 V
電壓 - 電源，數(shù)字： 2.97 V ~ 3.63 V
工作溫度： -40°C ~ 105°C
安裝類型： 表面貼裝
封裝/外殼： 32-VFQFN 裸露焊盤，CSP
供應商設備封裝： 32-LFCSP-EP（5x5）
包裝： 帶卷 (TR)
Data Sheet
ADAU1961
Rev. A | Page 35 of 76
Jack Detection
When the JACKDET/MICIN pin is set to the jack detect func-
tion, a flag on this pin can be used to mute the line outputs
when headphones are plugged into the jack. This pin can be
configured in Register R2 (digital microphone/jack detection
control register, Address 0x4008). The JDFUNC[1:0] bits set the
functionality of the JACKDET/MICIN pin.
Additional settings for jack detection include debounce time
(JDDB[1:0] bits) and detection polarity (JDPOL bit). Because
the jack detection and digital microphone share a pin, both
functions cannot be used simultaneously.
POP-AND-CLICK SUPPRESSION
Upon power-up, precharge circuitry is enabled to suppress pops
and clicks. After power-up, the precharge circuitry can be put
into a low power mode using the POPMODE bit in Register R34
(playback pop/click suppression register, Address 0x4028).
The precharge time depends on the capacitor value on the CM
pin and the RC time constant of the load. For a typical line output
load, the precharge time is between 2 ms and 3 ms. After this
precharge time, the POPMODE bit can be set to low power mode.
Changing any register settings that affect the signal path can
cause pops and clicks on the analog outputs. To avoid these pops
and clicks, mute the appropriate outputs using Register R29 to
Register R32 (Address 0x4023 to Address 0x4026). Unmute the
analog outputs after the changes are made.
LINE OUTPUTS
The line output pins (LOUTP, LOUTN, ROUTP, and ROUTN)
can be used to drive both differential and single-ended loads. In
their default settings, these pins can drive typical line loads of
10 kΩ or greater, but they can also be put into headphone mode
by setting the LOMODE bit in Register R31 (playback line output
left volume control register, Address 0x4025) and the ROMODE
bit in Register R32 (playback line output right volume control
register, Address 0x4026). In headphone mode, the line output
pins are capable of driving headphone and earpiece speakers of
16 Ω or greater. The output impedance of the line outputs is
approximately 1 kΩ.
When the line output pins are used in single-ended mode,
LOUTP and ROUTP should be used to output the signals, and
LOUTN and ROUTN should be left unconnected.
The volume controls for these outputs range from 57 dB to
+6 dB. Slew can be applied to all the playback volume controls
using the ASLEW[1:0] bits in Register R34 (playback pop/click
suppression register, Address 0x4028).
The MX5G4[1:0], MX5G3[1:0], MX6G3[1:0], and MX6G4[1:0]
bits can all provide a 6 dB gain boost to the line outputs. This
gain boost allows single-ended output signals to achieve 0 dBV
(1.0 V rms) and differential output signals to achieve up to
6 dBV (2.0 V rms). For more information, see Register R26
(playback L/R mixer left (Mixer 5) line output control register,
Address 0x4020) and Register R27 (playback L/R mixer right
(Mixer 6) line output control register, Address 0x4021).
MIXER 3
LEFT DAC
MX5G3[1:0]
MIXER 5
LOUTVOL[5:0]
LOUTP
MIXER 4
RIGHT DAC
MX6G4[1:0]
MIXER 6
ROUTVOL[5:0]
ROUTP
ROUTN
LOUTN
–1
08915-
063
Figure 47. Differential Line Output Configuration
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