AK4691 Datasheet, PDF (78/80 Pages) Asahi Kasei Microsystems – 4ch ADC + 2ch DAC with MIC/HP/SPK-AMP

[AK4691]
SYSTEM DESIGN
Figure 51 shows the system connection diagram for the AK4691. The evaluation board [AKD4691] demonstrates the
optimum layout, power supply arrangements and measurement results.
Analog Supply
2.6 ~ 5.5V
Analog Supply
2.6 ~ 3.6V
Analog Supply
2.6 ~ 5.5V
LINEIN
(see Figure 23)
LNEOUT
(see Figure 34, Figgure 36)
Rp
2.2μ 0.1μ 10μ 0.1μ
Cp
R
10μ 0.1μ
1μ
Internal MIC
External MIC
1μ
10μ 0.1μ
NC VCOC VCOM AVDD RIN LOUT LVCM MUTET NC
MRF PRELN1 VSS1 LIN BEEP ROUT LVDD HPL VSS4
PRERN2 PRELN2
VSS3 HPR
PRERN1 MVDD
MPWR INTL1
Top View
SVDD SPP
PDN
SPN
INTL2 EXTL1
CDTI/SDA MUTE
10μ
0.1μ
Headphone
(see Figure 38)
Analog Supply
2.6 ~ 3.6V
Speaker
uP
INTR1 EXTL2 NC
CSN/CAD0 CCLK/SCL
0.1μ
INTR2 EXTR1 TVDD1 MCKI SDTO2 LRCK MCKO TVDD2 NC
Digital Supply
1.6 ~ 3.6V
NC EXTR2 I2CN SDTI SDTO1 BICK DVDD VSS2 NC
0.1μ
0.1μ
10
Analog
Ground
Digital
Ground
DSP
Digital Supply
1.6 ~ 3.6V
Notes:
- VSS1, VSS2, VSS3 and VSS4 of the AK4691 should be distributed separately from the ground of external
controllers.
- All digital input pins should not be left floating.
- When the AK4691 is EXT mode (PMPLL bit = “0”), a resistor and capacitor of the VCOC pin is not needed.
- When the AK4691 is PLL mode (PMPLL bit = “1”), a resistor and capacitor of the VCOC pin is shown in Table
4.
- When the AK4691 is used in master mode, LRCK and BICK pins are floating before M/S bit is changed to “1”.
Therefore, 100kΩ around pull-up resistor should be connected to LRCK and BICK pins of the AK4691.
Figure 51. Typical Connection Diagram (I2CN pin = “H”, 3-wire Mode)
MS0672-E-00
- 78 -
2007/11