Low voltage SEMTECH SX9324ICSTRT proximity sensor with SAR control and intelligent detection engine
Product Overview
The SX9324 is an ultra-low power, smart proximity sensor designed for Specific Absorption Rate (SAR) control. It utilizes two sensor inputs and an intelligent engine to accurately differentiate between inanimate objects and the human body. This capability is crucial for portable electronic devices to reduce and manage radio-frequency (RF) emission power when a human body is present, helping manufacturers meet stringent emission regulations and SAR standards. The device operates from a low supply voltage and communicates via an I2C serial bus, offering programmable interrupt functionality and on-chip auto-calibration for consistent performance across varying environmental conditions.
Product Attributes
- Brand: Semtech
- Certifications: Pb & Halogen Free, RoHS/WEEE compliant
Technical Specifications
| Parameter | Symbol | Min | Typ. | Max | Unit | Notes |
| Input Supply Voltage | VDD | 1.7 | 2 | V | ||
| Active Mode Current Consumption | 22 | 45 | uA | SCANPERIOD = 30ms, FREQ = 100kHz, RESOLUTION = 64, PHEN = 0001 | ||
| Doze Mode Current Consumption | 6 | 14 | uA | SCANPERIOD = 400ms, FREQ = 100kHz, RESOLUTION = 64, PHEN = 0001 | ||
| Sleep Mode Current Consumption | 1.75 | uA | Power down. (I2C listening) PHEN = 0000 | |||
| Measurement Range (Low Gain) | CRANGEL | -1.325 | pF | AGAIN=1000, GAIN01/23=001, ARANGE01/23 = 0/Small | ||
| Measurement Range (High Gain) | CRANGEH | 2.65 | pF | AGAIN=1000, GAIN01/23=001, ARANGE01/23 = 1/Large | ||
| Measurement Resolution (Low Gain) | CRESL | 0.004 | fF | AGAIN=0110, GAIN01/23=100, ARANGE01/23 = 0/Small | ||
| Measurement Resolution (High Gain) | CRESH | 0.008 | fF | AGAIN=0110, GAIN01/23=100, ARANGE01/23 = 1/Large | ||
| Capacitive Sensing Interface - External DC Cap. to Ground per Measurement Phase | CDC | 200 | pF | |||
| I2C Serial Interface Speed | 400 | kHz | ||||
| Operating Temperature | TA | -40 | 85 | C | ||
| Package Type | WLCSP | 0.92 x 1.69 mm | ||||
| Part Number | SX9324ICSTRT | 3000 Units/reel | ||||
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