adau1361 Analog Devices, Inc., adau1361 Datasheet - Page 35

• Manufacturer Part Number: adau1361
• Description: Stereo, Low Power, 96 Khz, 24-bit Audio Codec With Integrated Pll
• Manufacturer: Analog Devices, Inc.

Pop-and-Click Suppression
Upon power-up, precharge circuitry is enabled to suppress pop
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
After this precharge time, the POPMODE bit can be set to low
power mode.
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, A
pins are capable of driving headphone and earpiec
16 Ω or gr ter.
Whe
LOU
LOUTN and
n the lin
TP and
ddress 0x4026). In headphone mode, the line o
ea
ROUTP
e output pin re used in single-end
ROUTN
should
shou
s a
ld be left disconnected.
be used to output t
2 ms and 3 ms.
he signals, and
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Rev. 0 | Page 35 of 80
s
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
Address 0x4020) and Register R27 (playback L/R mixer right
(M
RIGHT DAC
ixer 6) line output control register, Address 0x4021).
LEFT DAC
/R mixer left (Mixer 5) line output contro
Figure 46. Differential Line Output Configuration
MIXER 3
MIXER 4
MX5G3[1:0]
MX6G4[1:0]
MIXER 5
MIXER 6
LOUTVOL[5:0]
ROUTVOL[5:0]
–1
–1
ADAU1361
l regist ,
LOUTP
LO
ROUTN
ROUTP
UTN
er