Copyright © Azoteq (Pty) Ltd 2010.

IQS904 Datasheet

Page 6 of 23

All Rights Reserved.

Revision 1.06

December 2011

5 High Sensitivity

Through patented design and advanced signal

processing, the device is able to provide

extremely high sensitivity to detect proximity.

This enables designs to detect proximities at

distances that cannot be equalled by most

other products. When the device is used in

environments where noise or ground effects

exist that lower the sensitivity, a reduced

proximity threshold is proposed to ensure

reliable functioning of the sensor.

6 User Interface Description

The various power levels are summarised in Table 6.1.

Table 6.1

Power Levels for different operational modes

POWER % Duty Cycle

Power

50 Hz

60 Hz

DC

FITD (Find-In-The-Dark)

42.1

30.5

0.58

Low

47

37.5

1

High

100

100

100

6.1 User Interface: User Selectable Dimming Level

Long touch:

longer than 1 second.

Short touch:

shorter than 1 second.

Operation of UI:

•

Proximity detection will switch load on at FITD% for 16 seconds (50/60Hz dependent)

•

From initial OFF state,

short touch goes to full power.

•

From any ON state,

long touch & holding touch will change duty cycle / dimming

•

From any OFF state,

long touch start at low power and increase to full power. Holding touch

will change duty cycle / dimming

•

From any ON state,

short touch switches off.

•

Any

long touch held for longer than 60s switches off (This setting can be disabled by setting

the halt setting to always halt)

•

Long touch ramp time: 3 seconds.

•

Flat top and bottom pause time: 1.5 seconds.

•

Total cycle time: 9 seconds.

•

Auto-off time: 1 hour

•

Automatic dim time after Auto-off: 30 seconds.

•

Auto-off is enabled when switched on by

long touch

•

FITD time on Prox trigger: 16 seconds or 5 seconds