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AS3418 Datasheet(PDF) 58 Page - ams-OSRAM AG

Part # AS3418
Description  Low Noise ANC Solution
PDF  78 Pages
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Manufacturer  AMSOSRAM [ams-OSRAM AG]
Direct Link  https://ams-osram.com/
Logo AMSOSRAM - ams-OSRAM AG

AS3418 Datasheet(HTML) 58 Page - ams-OSRAM AG

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AS3418
Register Description
Datasheet
• PUBLIC
DS000507
• v4-00 • 2020-Jan-23
77
│ 57
Addr: 0x09
LED_ANC
Bit
Bit Name
Default
Access
Bit Description
11: 80ms on / 2.5s off
1:0
ANC_ILED
00
R/W
This register controls the integrated LED driver
current sink of the AS3418 in ANC operation mode.
The typical PWM frequency is 1/18µs=55.6kHz.
00: ILED current sink switched off
01: 25% duty cycle (4µs on/ 14µs off)
10: 50% duty cycle (9µs on/ 9µs off)
11: 100% duty cycle (18µs on/ 0µs off)
7.2.2
ANC Mode Control Registers
Figure 77:
ANC_MODE_REG Register Description
Addr: 0x0A
ANC_MODE_REG
Bit
Bit Name
Default
Access
Bit Description
7:6
ANC_HPH_M
UX
11
R/W
This register selects the ANC input source for the
headphone amplifier in ANC mode. Depending on
the register, setting different outputs are routed to the
headphone amplifier input. It is also possible to
disconnect all ANC input sources which is sometimes
desired in monitor mode.
00: QMIC outputs are connected to HPH input
01: OP1 outputs are connected to HPH input
10: Do not use this setting
11: Nothing connected to HPH input except line
input in case it is enabled.
5
LIN_MUTE
0
R/W
This bit mutes the line input signal. If the bit is set the
line input signal is disconnected from the headphone
amplifier in ANC operation mode.
0: Line input signal enabled
1: Line input signal muted
1
ANC_OP1L_O
N
0
R/W
This register enables the left channel of OPAMP 1 in
ANC operation mode.
0: Left OP1 is switched off
1: Left OP1 is switched on
0
ANC_OP1R_
ON
0
R/W
This register enables the right channel of OPAMP 1
in ANC operation mode.
0: Right OP1 is switched off



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