AK4685 AKM [Asahi Kasei Microsystems], AK4685 Datasheet - Page 36

• Manufacturer Part Number: AK4685
• Description: Multi-channel CODEC with Differential Analog I/O
• Manufacturer: AKM [Asahi Kasei Microsystems]

Notes:
MS1106-E-00
(10) Headphone-Amp mute release: HPMTN pin = “L”
(12) Headphone-Amp power-down: PWHPL/R bits = “1”
(13) PWDA2 bit = “1”
(11) Headphone-Amp mute: HPMTN pin = “H”
(14) Mute the analog outputs externally if the click noise (8) influences a system application.
(1) The PDN pin should be set “L” “H” after the all powers (TVDD, DVDD1/2/3, AVDD1/2/3 and PVDD) are
(2) Power-on the regulator, charge pump circuit, VCOM, HP-Amp and internal oscillator:
(4) The analog block of the DAC is initialized after exiting the power-down state.
(5) The digital outputs corresponding to analog inputs, and the analog outputs corresponding to digital inputs have
(6) ADC output is “0” data at the power-down state.
(7) Click noise occurs at the end of initialization of the analog block. Mute the digital outputs externally if the click
(8) A click noise occurs at the falling edge of PDN and at 512/fs after the rising edge(after charge-pump is power-on)
(9) Power-up of Headphone-Amp: PWHP bit = “0”
(3) The analog block of the ADC is initialized after exiting the power-down state.
supplied. The AK4685 requires 150ns or longer “L” period for a reset. The AK4685 should be powered-up when the
PDN pin = “L”.
of PDN.
group delay (GD).
noise influences a system application.
The PVEE pin becomes to the same voltage as PVEE within 8.0ms (max).
Headphone-Amp is powered-down immediately.
Headphone-Amp goes to the normal operation after the transition time. Headphone-Amp mute release time
depends on the setting of PTS1-0 and MOFF bits.
Headphone-Amp goes to mute state after the transition time set by PTS1-0 and MOFF bits.
The PVEE pin becomes 0V according to the time constant of the capacitor at the PVEE pin and the internal
resistor. The internal resistor is 17.5kΩ (typ.).
Headphone-Amp is in mute state and outputs ground level. Headphone-Amp power-up time is 27.7ms (max.).
“0”
“L”
- 36 -
“1”
“H”
“0”
[AK4685]
2009/08