ak4387 AKM Semiconductor, Inc., ak4387 Datasheet - Page 14

• Manufacturer Part Number: ak4387
• Description: 106db 192khz 24-bit 2ch ?? Dac
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
When RSTN bit =0, DAC is powered down but the internal register values are not initialized. The analog outputs go to
VCOM voltage and DZF pins go to “H”. Figure 7 shows the example of reset by RSTN bit.
Notes:
MS0429-E-00
Reset Function
(1) The analog output corresponding to digital input has the group delay (GD).
(2) Analog outputs go to VCOM voltage (AVDD/2).
(3) Click noise occurs at the edges(“↑ ↓”) of the internal timing of RSTN bit. This noise is output even if “0” data is
(4) The external clocks (MCLK, BICK and LRCK) can be stopped in the reset mode (RSTN pin = “L”).
(5) DZF pins go to “H” when the RSTN bit becomes “0”, and go to “L” at 2/fs after RSTN bit becomes “1”.
(6) There is a delay, 3~4/fs from RSTN bit “0” to the internal RSTN bit “0”, and 2~3/fs from RSTN bit “1” to the
Internal
D/A In
D/A Out
Clock In
MCLK,LRCK,BICK
RSTN bit
Internal
RSTN bit
DZF
input.
internal RSTN bit “1”.
(Digital)
(Analog)
State
Normal Operation
(1)
Figure 7. Reset Sequence Example
GD
(3)
Digital Block Power-down
- 14 -
3~4/fs (6)
“0” data
(4)
Don’t care
(2)
(3)
2~3/fs (6)
2/fs(5)
Normal Operation
GD
(1)
[AK4387]
2005/09