IQ Switch ProxSense Series

Copyright Azoteq (Pty) Ltd 2012 Page 1 of 3 All Rights Reserved Revision 1.00

January 2012

IQS128 on AZP242A02 Connection Guide

1 IQS128 on AZP242A02

2 PCboard (AZP242A02)

3 PCB Layout

Figure 1.1 Top layer component placement

GND

CTRL/ND

VDDHI

CX/Sense plate OUT

VDDHI

GND

C21uF

CXOUT

CTRL/ND VREG

C31uF

GND

C1100pF

C4100pF

R2

470R

OUTOUT

R3

2K0

CX

CTRL/ND3

OUT1

VREG 4

CX 6

VSS2 VDDHI 5

U1

IQS128 TSOT23-6

CTRL/NDCTRL/ND

R1

2K0

VDDHIVDDHI

Connect CX to sense button(See Appnote: AZD008 for button design guidelines)

OUT = DYCAL OutputCTRL = Input CTRL or Touch outputND = Multiplexed optional Noise DetectorOptional: 100pF capacitors for additional RF immunity (C1 and C4).

IQ Switch ProxSense

Copyright Azoteq (Pty) Ltd 2012 Page 3 of 3 All Rights Reserved Revision 1.00

January 2012

Proximity and Touch sensitivity selections 6 pin TSOT23-6 IQS128LP offered in DFN(2x3)-8 Touch: 6 mm plastic, 10 mm glass Proximity: 15cm

IQS128EV01 Kit includes: 3 x Module PCB with IQS128 (TSOT23-6)

Contact Information Please visit www.azoteq.com for comprehensive datasheets, application notes, reference designs and a list of distributors for your region.