Proximity/Touch Controller. IQS211B Datasheet

IQS211B Controller. Datasheet pdf. Equivalent

Part IQS211B
Description Single Channel Capacitive Proximity/Touch Controller
Feature ProxSense® Series IQS211A/B Datasheet Single Channel Capacitive Proximity/Touch Controller with mov.
Manufacture Azoteq
Total Page 30 Pages
Datasheet
Download IQS211B Datasheet



IQS211B
ProxSense® Series
IQS211A/B Datasheet
Single Channel Capacitive Proximity/Touch Controller with movement detection
The IQS211A/B ProxSense® IC is a self-capacitance controller designed for applications where an
awake/activate on proximity/touch function is required. The IQS211A/B is an ultra-low power
solution that uses movement detection for applications that require long term detection. The
IQS211A/B operates standalone or I2C and can be configured via OTP (One Time Programmable)
bits.
IQS211B offers alternate hardware with identical firmware to the IQS211A. IQS211B hardware
offers improved temperature response and low temperature range.
Features
Pin compatible with IQS127D/ 128/ 227AS/
228AS/ 231A (output types may differ)
RoHS2
Compliant
Automatic Tuning Implementation (ATI)
On-chip movement detection algorithm
Forced activation when movement detected
8 pin WLCSP-8
6 pin TSOT23-6
Minimal external components
Representations only, not actual markings
Down to 10aF capacitance resolution
Up to 60pF sensor load (with effective
o Runtime switch to standalone mode
movement detection)
Separate MOVEMENT output selection:
Up to 200pF sensor load for touch
application
Pulse Frequency Modulation (PFM, default),
Pulse Width Modulation (PWM), Latched, or
PWM only active in activation
Multiple One-Time-Programmable
options
Standalone direct outputs:
o Primary output (configurable)
Default: ACTIVATION
(OTP)
Low power consumption:
o 80uA (50 Hz response),
o 20uA (20 Hz response)
o sub-2uA (LP mode, optional zoom to
scanning mode with wake-up)
o Secondary output (configurable)
Low power options:
Default: MOVEMENT
o Low power without activation
1-Wire streaming interface:
o Low power within activation
o 1-Wire & event CLK signal
o Low power standby modes with
o Valuable for debugging
proximity wake-up / reset wake-up
Various I2C configurations:
Internal Capacitor Implementation (ICI)
o Normal polling
o Polling with RDY interrupt on SCL
Supply voltage: 1.8V to 3.6V
Applications
Wearable devices
Movement detection devices
anti-theft)
White goods and appliances
Human Interface Devices
Proximity activated backlighting
(fitness,
Applications with long-term activation
TA
-20°C to
85°C
-40°C to
85°C
Available Packages
TSOT23-6 WLCSP-8
(1.5 x 0.9 x 0.4mm)
IQS211A
IQS211A
IQS211B
Copyright © Azoteq 2018
All Rights Reserved
IQS211A/B Datasheet v2.1
Check for latest datasheet OTP summary Memory map summary
Page 1 of 32
December 2018



IQS211B
ProxSense® Series
1 Functional block diagram
VDDHI
VREG
Internal
regulator
BOD
POR
circuit
Digital - μP, RAM, ROM
Non-
volatile
memory
VDDHI
VSS
Analog
ProxSense Engine (ADC)
Cx
Reference GND
(battery, metal frame,
copper pad)
Analog - Capacitive
offset calibration
Sensing Pad
I2C
HW
or
GPIO
SDA / IO2
SCL / IO1
MCU
(Master)
∆E-field = ∆Capacitance
Figure 1-1 IQS211A/B functional block diagram
The IQS211A/B supports relative capacitance measurements for detecting capacitance
changes.
Basic features of the IQS211A/B include:
Charge-transfer capacitance measurement technology (Analog ProxSense® Engine)
Finite state machine to automate detection and environmental compensation without MCU
interaction (integrated microprocessor)
Self-capacitance measurements
Signal conditioning to provide signal gain (Analog Capacitive offset calibration)
Signal conditioning to provide offset compensation for parasitic capacitance (Analog
Capacitive offset calibration)
Integrated calibration capacitors (Analog Capacitive offset calibration)
Integrated timer for timer triggered conversions
Integrated LDO regulator for increased immunity to power supply noise
Integrated oscillator
Processing logic to perform measurement filtering, environmental compensation, threshold
detection and movement detection
Copyright © Azoteq 2018
All Rights Reserved
IQS211A/B Datasheet v2.1
Check for latest datasheet OTP summary Memory map summary
Page 2 of 32
December 2018





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