IQS231A Datasheet, PDF (1/36 Pages) List of Unclassifed Manufacturers – Integrated SAR user interface offering a simple GPIO output

ProxSense^® Series
IQS231A Datasheet
Single Channel Capacitive Proximity/Touch Controller for SAR applications
The IQS231A ProxSense® IC is a self-capacitance controller designed for applications where
an awake/activate on proximity function is required. The IQS231A is an ultra-low power
solution that uses unique release and/or movement detection for applications that require long-
term detection. The IQS231A operates standalone or I2C and features configuration via OTP
(One Time Programmable) bits. Switching from I2C to standalone during runtime is also
possible in order to access all settings while offering the simplicity of a standalone output.
Features
Integrated SAR user interface offering a
simple GPIO output
Quick release detection – effectively
prevent false triggers
Quick release sensitivity options
Wide range of control for sensing in
high power RF environments
Pin compatible with IQS128 and
IQS229
1.8V to 3.3V Input voltage, trimmed to
use proximity detection with 1.8V digital
interface
External threshold adjustment pin
(minimize need for pre-empted OTP
adjustments)
Minimal external components (direct
input strap)
Standalone failsafe mode (backwards
compatible failsafe output, short pulses
on output to indicate operational device)
Default OTP options focus on safety
and passing SAR lab qualification,
OTP changes offer performance
advantages
I2C interface option (improved
compatibility)
Extended controls in I²C mode (setup
in I²C, runtime with standalone output)
RoHS2
Compliant
6 pin TSOT23-6
10 pin DFN10
Representations only, not actual markings
Optional input for synchronized
implementations (input to instruct IC when
to sense)
Synchronization output – failsafe pulses
may be used by the master to synchronize
on. Sensing is done after each pulse
Synchronization input – Sensing is only
done while Sync input is low
Low power sensing: 30Hz (default), 100Hz,
8Hz, 4Hz (sub 6uA mode)
Constant sampling rates during all power
modes with rapidly debounced output
changes
Advanced temperature compensation
option
Applications
SAR sensor
Integrated hybrid designs (RF and
capacitive sensing combined)
Hold detection for screen activation
On-ear detection
Movement sensing applications (user
interaction detection, anti-theft)
T_A
DFN10
-40°C to 85°C IQS231A
TSOT23-6
IQS231A
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IQS231A Datasheet v1.3
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December 2016