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 2 IQS211A/B operates standalone or I C 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 RoHS2 Compliant Pin compatible with IQS127D/ 128/ 227AS/ 228AS/ 231A (output types may differ) Automatic Tuning Implementation (ATI) On-chip movement detection algorithm Forced activation when movement detected 6 pin TSOT23-6 8 pin WLCSP-8 Minimal external components Representations only, not actual markings Down to 10aF capacitance resolution o Runtime switch to standalone mode Up to 60pF sensor load (with effective Separate MOVEMENT output selection: movement detection) Pulse Frequency Modulation (PFM, default), Up to 200pF sensor load for touch Pulse Width Modulation (PWM), Latched, or application PWM only active in activation Multiple One-Time-Programmable (OTP) Low power consumption: options o 80uA (50 Hz response), Standalone direct outputs: o 20uA (20 Hz response) o Primary output (configurable) o sub-2uA (LP mode, optional zoom to Default: ACTIVATION 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 2 Various I C configurations: Internal Capacitor Implementation (ICI) o Normal polling Supply voltage: 1.8V to 3.6V o Polling with RDY interrupt on SCL Applications Wearable devices Applications with long-term activation Movement detection devices (fitness, Available Packages anti-theft) T TSOT23-6 WLCSP-8 A (1.5 x 0.9 x 0.4mm) White goods and appliances -20C to IQS211A IQS211A Human Interface Devices 85C Proximity activated backlighting -40C to IQS211B 85C Copyright Azoteq 2018 IQS211A/B Datasheet v2.1 Page 1 of 32 All Rights Reserved December 2018 Check for latest datasheet OTP summary Memory map summary ProxSense Series 1 Functional block diagram VDDHI VDDHI VREG BOD Non- Internal POR Digital - P, RAM, ROM volatile regulator circuit memory VSS SDA / IO2 Analog I2C ProxSense Engine (ADC) HW SCL / IO1 MCU or (Master) GPIO Analog - Capacitive offset calibration Cx Reference GND (battery, metal frame, Sensing Pad copper pad) 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 IQS211A/B Datasheet v2.1 Page 2 of 32 All Rights Reserved December 2018 Check for latest datasheet OTP summary Memory map summary