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

Applications
• Mobile Phones
• Tablets
• Notebooks

Description
The SX9328 is a capacitive Specific Absorption Rate
(SAR) controller.
The SX9328 can use any of its three sensor inputs to
detect an object. The resulting detection is then used in
portable electronic devices to reduce and control radiofrequency
(RF) emission power in the presence of a
human body, enabling significant performance
advantages for manufacturers of electronic devices with
electro-magnetic radiation sources to meet stringent
emission regulations' criteria and Specific Absorption
Rate (SAR) standards.
Operating directly from an input supply voltage of 1.7 to
2V, the SX9328 outputs its data via I2C serial bus. The
I2C serial communication bus port is compatible with 1.8V
host control to report body detection/proximity and to
facilitate parameter settings adjustment. Upon proximity
detection, the NIRQ output asserts, enabling the user to
either determine the relative proximity distance, or simply
obtain an indication of detection.
The SX9328 includes an on-chip auto-calibration
controller that regularly performs sensitivity adjustments
to maintain peak performance over a wide variation of
temperature, humidity and noise environments, providing
simplified product development and enhanced
performance.