SX9328ICSTRT Product Information Summary

Product Overview

• Manufacturer: Semtech Corporation
• Model: SX9328ICSTRT
• Description: PerSe™ Connect, High Performance 3-ch. SAR Sensor

Applications

• Mobile Phones
• Tablets
• Notebooks

Features

• Input Supply Voltage: ~1.8V
• Capacitive Sensor Inputs: Up to 3
• Capacitance Resolution: Down to 0.008fF
• Capacitance Offset Compensation: Up to 180pF
• Advanced Temperature Compensation
• Automatic Calibration
• Ultra Low Power Consumption:Active Mode: 22 µADoze Mode: 6 µASleep Mode: 1.75 µA
• 400kHz I2C Serial Interface
• Programmable Interrupt or Real-Time Status Pin
• Two Reset Sources: POR, Soft Reset
• Operating Temperature: -40°C to +85°C
• Compact Size: 0.92 x 1.69 mm WLCSP package
• Pb & Halogen Free, RoHS/WEEE compliant

Ordering Information

• Part Number: SX9328ICSTRT
• Package: WLCSP-8
• Marking: V8CS
• Quantity: 3000 Units/reel

General Description

• Pin Diagram:VDD: Power Supply, requires decoupling capacitor.GND: Ground.CS0, CS1, CS2: Analog Capacitive Sensor Inputs.SCL: I2C Clock, requires pull-up resistor.SDA: I2C Data, requires pull-up resistor.NIRQ: Interrupt Output and Pause Input, requires pull-up resistor.

Electrical Characteristics

• Absolute Maximum Ratings:Supply Voltage (VDD): -0.5V to 2.2VPull-up Voltage (VPULL): -0.5V to 3.9VInput Voltage (non-supply pins): -0.5V to VDD + 0.3VInput Current (non-supply pins): ±10mAOperating Junction Temperature (TJCT): -40°C to 125°CReflow Temperature (TRE): Up to 260°CStorage Temperature (TSTOR): -50°C to 150°CESD HBM: 4kV
• Operating Conditions:Supply Voltage (VDD): 1.7V to 2VAmbient Temperature (TA): -40°C to 85°C
• Thermal Characteristics:Thermal Resistance (θJA): 120°C/W
• Electrical Specifications:Current Consumption:Sleep Mode: 1.75µA (max)Doze Mode: 6µA (max)Active Mode: 22µA (max)Capacitive Sensing Interface:Measurement Range: ±2.65pFMeasurement Resolution: 16 bitsSampling Frequencies: Programmable, 4.63kHz to 250kHzScan Periods: Programmable, 2ms to 4sOutputs (SDA, NIRQ):Output Low Current (IOL): 3mA (min) at VOL ≤ 0.32VInputs (SCL, SDA, NIRQ):Input High Voltage (VIH): 0.7 x VDDInput Low Voltage (VIL): -0.5V to 0.3 x VDDInput Leakage Current (IL): ±1µA

Proximity Sensing Interface

• Introduction: Detects conductive objects (e.g., fingers, palms) in proximity.
• Scan Period: Programmable from 2ms to 4s.
• Analog Front-End (AFE):Capacitance-to-Voltage Conversion (C-to-V)Shield ControlOffset Compensation: Up to 180pFAnalog-to-Digital Conversion (ADC)
• Digital Processing:PROXRAW Update: Raw capacitance measurement.PROXUSEFUL Update: Filtered capacitance measurement.PROXAVG Update: Average capacitance measurement.PROXDIFF Update: Differential capacitance measurement.PROXSTAT Update: Proximity status flag.

I2C Interface

• Introduction: Standard and Fast mode (100kb/s and 400kb/s) compliant.
• I2C Write: Sequential write operations.
• I2C Read: Sequential read operations.

Reset

• Power-Up: NIRQ asserts LOW upon power-up.
• Software Reset: Writing 0xDE to RegReset resets the chip.

Interrupt

• Power-up: NIRQ asserts LOW upon power-up.
• Assertion and Clearing: NIRQ asserts once per scan period and is cleared by reading RegIrqSrc.

Registers

• Interrupt and Pause Control: RegHostIrqSrc, RegStat0-3, RegIrqMsk, RegIrqCfg0-1.
• General Control: RegGnrlCtrl0-1, RegI2cAddr.
• Analog-Front-End (AFE) Control: RegAfeCtrl0-9, RegAfePh0-3, RegAfeCtrl8-9.
• Main Digital Processing (Prox) Control: RegProxCtrl0-7.
• Advanced Digital Processing Control: RegAdvCtrl0-12.
• Phase Data Readback: RegPhaseSel, RegUseMsb-Lsb, RegAvgMsb-Lsb, RegDiffMsb-Lsb, RegOffsetMsb-Lsb.
• Miscellaneous: RegReset, RegWhoAmI, RegRev.

Application Information

• Typical Application Circuit: Detailed circuit diagram.
• External Components Recommended Values:CDD: Supply Decoupling Capacitor, 0.8µF to 1.2µF, X5R type.RPULL: Host Interface Pull-ups, 2.2kΩ.