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PDF IQS156 Data sheet ( Hoja de datos )
| Número de pieza | IQS156 | |
| Descripción | Minimalist Capacitive Sensor | |
| Fabricantes | Azoteq | |
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Hay una vista previa y un enlace de descarga de IQS156 (archivo pdf) en la parte inferior de esta página. Total 25 Páginas | ||
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IQ Switch®
ProxSense® Series
IQS156 Datasheet
IQ Switch® - ProxSense® Series
Minimalist Capacitive Sensor with Compensation for Sensitivity Reducing Objects
Unparalleled Features
Sub 6uA current consumption
Automatic tuning for optimal operation in various environments
The IQS156 ProxSense® IC is a fully integrated six channel capacitive contact and proximity
sensor with market leading sensitivity and automatic tuning to the sense electrodes. The IQS156
provides a minimalist implementation requiring as few as 2 external components. The device is
ready for use in a large range of applications while programming options allow customisation for
specialized applications.
Main Features
6 Channel input device
I2C data output
ATI: Automatic tuning to optimum sensitivity
Supply Voltage 3V to 5.5V
8 Power Modes (6µA min)
Internal voltage regulator and reference capacitor
Large proximity detection range
Automatic drift compensation
IQS143 MSOP10
Representations only, not
actual markings
Development and Programming tools available (VisualProxSense and USBProg)
Small outline MSOP–10
Applications
White goods and appliances
Office equipment, toys, sanitary ware
Flame proof, hazardous environment Human Interface Devices
Proximity detection that enables backlighting activation (Azoteq Patented)
Wake-up from standby applications
Replacement for electromechanical switches
GUI trigger on proximity detection.
Available options
TA MSOP-10
-40°C to 85°C
IQS156
1 page  
SCL (A)
(B)
IQ Switch®
ProxSense® Series
(D) (D)
(C) (A)
SDA
Start Condition
Address or
Acknowledge
Valid
Data Allowed
to Change
Stop Condition
Figure 9.1 Data Transfer Sequence on the Serial Bus.
9.1.2 Bus Idle (A)
The IQS156 does not generate any
The SCL and SDA lines are both HIGH.
acknowledge bits while it is not in its
communication window.
9.1.3 START Condition (B)
9.2 Acknowledge Polling
A start condition is implemented as a HIGH to
LOW transition of SDA, while the SCL is The IQS156 does not have a RDY pin, thus
HIGH. All serial communication must be ACK polling must be used to determine when
preceded by a START condition.
the device is ready for communication. The
device will not acknowledge during a
9.1.4 STOP Condition (C)
conversion cycle.
A stop condition is implemented as a LOW to Once a stop condition is sent by the master
HIGH transition of SDA, while the SCL is the device will perform the next conversion
HIGH. All serial communication must be cycle. ACK polling can be initiated at any time
ended by a STOP condition. NOTE: When a during the conversion cycle to determine if the
STOP condition is sent, the device will exit the device has entered its communication window.
communications window and continue with
conversions.
To perform ACK polling the master sends a
start condition followed by the control byte. If
9.1.5 Data Valid (D)
the device is still busy then no ACK will be
The state of the SDA line represents valid returned. If the device has completed its cycle
data when, after a START condition, the SDA the device will return an ACK, and the master
is stable for the duration of the HIGH period of can proceed with the next read or write
the clock signal.
operation (refer to Figure 9.2).
The data on the line must be changed during
the LOW period of the clock signal. There is
one clock pulse per bit of data.
Each data transfer is initiated with a START
condition and terminated with a STOP
condition.
9.1.6 Acknowledge
The slave device must acknowledge (ACK)
after the reception of each byte. The master
device must generate an extra (9th) clock
pulse which is associated with this
acknowledge bit. The device that
acknowledges, has to pull down the SDA line
during the acknowledge clock pulse. NOTE:
Copyright © Azoteq (Pty) Ltd 2012.
All Rights Reserved.
IQS156 Datasheet
Revision 1.7
Page 5 of 24
October 2012
5 Page 
Comp5:Comp0
IQ Switch®
ProxSense® Series
Sets the compensation value for channel 1
Can set the counts outside the ATI routine limit if “ATI OFF” is
not set. This event will trigger re-ATI.
C6H
Bit 7
Channel 2 Compensation Setting
654321
Compensation 2 <5:0>
R/W
0
R/W
Comp5:Comp0
Sets the compensation value for channel 2
Can set the counts outside the ATI routine limit if “ATI OFF” is
not set. This event will trigger re-ATI.
C7H
Bit 7
Channel 3 Compensation Setting
654321
Compensation 3 <5:0>
R/W
0
R/W
Comp5:Comp0
Sets the compensation value for channel 3
Can set the counts outside the ATI routine limit if “ATI OFF” is
not set. This event will trigger re-ATI.
C8H
Bit 7
Channel 4 Compensation Setting
654321
Compensation 4 <5:0>
R/W
0
R/W
Copyright © Azoteq (Pty) Ltd 2012.
All Rights Reserved.
IQS156 Datasheet
Revision 1.7
Page 11 of 24
October 2012
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet IQS156.PDF ] | |
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