AK4340_06 AKM [Asahi Kasei Microsystems], AK4340_06 Datasheet - Page 14

• Manufacturer Part Number: AK4340_06
• Description: 192kHz 24-Bit Stereo ?? DAC with 2Vrms Output
• Manufacturer: AKM [Asahi Kasei Microsystems]

ASAHI KASEI
Outputs level of AOUTL/AOUTR pin can be selected by GAIN pin.
Soft mute operation is performed in digital domain. When the SMUTE bit (SMUTE pin) goes to “1”(“H”), the output
signal is attenuated by -∞ during ATT_DATA×ATT transition time (Table 8) from the current ATT level. When the
SMUTE bit (SMUTE pin) is returned to “0” (“L”), the mute is cancelled and the output attenuation gradually changes to
the ATT level during ATT_DATA×ATT transition time. If the soft mute is cancelled before attenuating to -∞ after
starting the operation, the attenuation is discontinued and returned to ATT level by the same cycle. The soft mute is
effective for changing the signal source without stopping the signal transmission.
Notes:
The AK4340 should be reset once by bringing PDN pin = “L” upon power-up. The AK4340 is powered up and the
internal timing starts clocking by LRCK “ ↑ ” after exiting reset and power down state by MCLK. The AK4340 is in the
power-down mode until MCLK and LRCK are input.
MS0501-E-00
Output Gain Setting
Soft Mute Operation
System Reset
(2) The analog output corresponding to the digital input has a group delay, GD.
(1) ATT_DATA×ATT transition time (Table 8). For example, in Normal Speed Mode, this time is 1020LRCK cycles
(3) If the soft mute is cancelled before attenuating to -∞ after starting the operation, the attenuation is discontinued and
SMUTE bit or
SMUTE pin
Attenuation
AOUT
(1020/fs) at ATT_DATA=255.
returned to ATT level by the same cycle.
ATT Level
-∞
GAIN pin
H
L
(1)
Figure 10. Output Level Setting
Figure 11. Soft Mute function
+1.94dB
GAIN
0dB
GD
- 14 -
(2)
Output Level (VDD=5V)
2.5Vrms (typ)
2Vrms (typ)
(1)
GD
(3)
[AK4340]
2006/04