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.