AKD4345 View Datasheet(PDF) - Asahi Kasei Microdevices

Part Name

Description

Manufacturer

AKD4345

100dB 96kHz 24-Bit Stereo 3.3V ΔΣDAC with DIT

Asahi Kasei Microdevices 

[AK4345]

■ Reset Function

(1) Reset by RSTN bit

When RSTN bit =0, DAC is powered down but the internal register values are not initialized. The analog outputs go to

VCOM voltage Figure 18 shows the example of reset by RSTN bit.

RSTN bit

Internal

RSTN bit

Internal

State

D/A In

(Digital)

D/A Out

(Analog)

Clock In

MCLK,LRCK,BICK

Normal Operation

(1)

GD

3~4/fs (6)

2~3/fs (6)

Digital Block

Pd

“0” data

(3) (2)

Normal Operation

GD (1)

(3)

(4)

Don’t care

Notes:

(1) The analog output corresponding to digital input has the group delay (GD).

(2) Analog outputs go to VCOM voltage (VDD/2).

(3) Click noise occurs at the edges(“↑ ↓”) of the internal timing of RSTN bit. This noise is output even if “0” data is

input.

(4) The external clocks (MCLK, BICK and LRCK) can be stopped in the reset mode (RSTN bit = “0”).

(5) 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 RSTN bit “1”.

Figure 18. Reset Sequence Example1

MS0635-E-01

- 16 -

2010/09

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