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231ABB Datasheet(PDF) 6 Page - List of Unclassifed Manufacturers |
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231ABB Datasheet(HTML) 6 Page - List of Unclassifed Manufacturers |
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6 / 36 page  ProxSense ® Series Copyright © Azoteq 2016 IQS231A Datasheet v1.3 Page 6 of 36 All Rights Reserved Check for latest datasheet December 2016 Figure 2.2 IQS231A TSOT23-6 reference schematic Footnotes: * R2: Place a 40Ω resistor in the VDDHI supply line to prevent a potential ESD induced latch- up. Maximum supply current should be limited to 80mA on the IQS231A VDDHI pin to prevent latch-up. ** C1 & C3: Choose these capacitors based on the selected sampling rate 30Hz 100Hz 8Hz 4Hz C1 1uF 1uF 2.2uF 4.7uF C3 1uF 1uF 4.7uF 10uF ***C5: Example load of 10pF. This value may vary to adjust sensitivity. 1pF for higher sensitivity and up to 60pF for proximity detection use. ****R1: Vary this value to control the RC slope of the capacitance measurement signal. Use for harmonic suppression and to enable a high impedance sensing path in a low impedance system. GND C1 1uF GND C2 100pF C4 100pF C3 1uF GND VDDHI GND CX VIN GND R1 GND VDDHI Configure these resistors for IQS231A I2C operation. PIN3: IQS231A SDA Pull-up PIN1: IQS231A SCL Pull-up R2 4.7K R3 4.7K VDDHI IO2/SDA GND IO1/SCL IO2/SDA Optional: LED and current limiting resistor PIN1: Output LED and current limiting resistor on primary output VDDHI R4 1.0K DS1 BLUE IO1/SCL IO1/SCL IO1/SCL IO1/SCL IO2/SDA IO2/SDA C5 10pF GND LK1 2W-SLink Open IO2/SDA 3 IO1/SCL 1 VREG 4 CX 6 VSS 2 VDDHI 5 U1 IQS231A TSOT23-6 Option: Sensitivity input GND for more sensitivity **** *** ** ** 40R * |
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