SX9331EVKA datasheet(2/48 Pages) SEMTECH

2 / 48 page

SX9331

Final Datasheet

April 21, 2023

www.semtech.com

2 of 48

Rev. 2

Proprietary & Confidential

Semtech

Table of Contents

General Description .............................................................................................. 5

1.1. Pin Diagram ....................................................................................................... 5

1.2. Marking Information .............................................................................................. 5

1.3. Pin Description .................................................................................................... 6

Electrical Characteristics......................................................................................... 7

2.1. Absolute Maximum Ratings ..................................................................................... 7

2.2. Operating Conditions............................................................................................. 7

2.3. Thermal Characteristics.......................................................................................... 7

2.4. Electrical Specifications.......................................................................................... 8

Proximity Sensing Interface ....................................................................................11

3.1. Introduction .......................................................................................................11

3.2. Scan Period ......................................................................................................12

3.3. Analog Front-End (AFE) ........................................................................................12

3.3.1. Capacitive Sensing Basics .....................................................................................12

3.3.2. AFE Block-Diagram .............................................................................................14

3.3.3. Capacitance-to-Voltage Conversion (C-to-V) ................................................................14

3.3.4. Shield Control ....................................................................................................14

3.3.5. Offset Compensation............................................................................................14

3.3.6. Analog-to-Digital Conversion (ADC) ..........................................................................15

3.4. Digital Processing ...............................................................................................15

3.4.1. Overview..........................................................................................................15

3.4.2. PROXADC Update ..............................................................................................17

3.4.3. PROXUSEFUL Update .........................................................................................18

3.4.4. PROXAVG Update ..............................................................................................18

3.4.5. PROXDIFF Update ..............................................................................................18

3.4.6. PROXSTAT Update .............................................................................................19

3.5. Host Operation ...................................................................................................19

3.6. Operational Modes ..............................................................................................20

3.6.1. Active..............................................................................................................20

3.6.2. Doze...............................................................................................................21

3.6.3. Sleep ..............................................................................................................21

SX9331EVKA Datasheet(PDF) 2 Page - Semtech Corporation