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AS3418

Functional Description

Datasheet

• PUBLIC

DS000507

• v4-00 • 2020-Jan-23

│ 42

Figure 56:

Production Trim Box

With this new system, there is no need for mechanical potentiometers any more. Up to now, operators

in production used to use screw drivers to fine tune the ANC performance of each headset. The

disadvantage of this is reliability and cost of potentiometers. Additionally, operators are not always

precise in their work, thus yielding inconsistent results. With the production trimming system from ams

there are no mechanical potentiometers required. The operator connects a 3.5mm audio jack to a

trimming box and this box enables the audio input of the headset to become the ANC tuning input.

This new feature also helps industrial designers of headset because there are no more considerations

concerning leakage holes for the old mechanical trimming. Thus, the headset can be fully assembled

and ready for the ANC test system at the end of the manufacturing process. The trim box can be

easily controlled with an USB interface so it is also possible to create fully automated trimming

systems. For further details please contact our local sales office; they can provide you with source

code examples and application notes.

6.12

I2C Interface

In order to configure the device using the evaluation software or a MCU the AS3418 features a serial

two wire interface. The I²C address for the device can be found in Figure 57.

Figure 57:

2C Slave Address

7 bit I2C address

8 Bit read address

8 Bit write address

0x47

0x8F

0x8E

LINR

TRSCL

MUTE

TRSDA

EEPROM

to HPH

Application Trim Box

AS3418

LINL

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