Datasheet > MC34940R2

MC34940R2

更新时间： 2024-02-27 19:19:22

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		/
页数	文件大小	规格书
9页	294K
描述
Electric Field Imaging Device

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数据手册

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MC34940R2 数据手册

Document order number: MC34940

Rev 2.0, 2/2006

Freescale Semiconductor

Technical Data

Electric Field Imaging Device

The 34940 is intended for cost-sensitive applications where non-contact

sensing of objects is desired. When connected to external electrodes, an

electric field is created. The 34940 detects objects in this electric field. The IC

generates a low-frequency sine wave, which is adjustable by using an external

resistor and is optimized for 120 kHz. The sine wave has very low harmonic

content to reduce harmonic interference. The 34940 also contains support

circuits for a microcontroller unit (MCU) to allow the construction of a two-chip

E-field system.

34940

ELECTRONIC FIELD

IMAGING DEVICE

Features

•

Supports up to 7 Electrodes

Shield Driver for Driving Remote Electrodes Through Coaxial

High-Purity Sine Wave Generator Tunable with External Resistor

Response Time Tunable with External Capacitor

Can support up to 28 touch pad sensors

Pb-Free and RoHS compliant

Typical Applications

•

Appliance Control Panels and Touch Sensors

Linear and Rotational Sliders

Spill Over Flow Sensing Measurement

Refrigeration Frost Sensing

Industrial Control and Safety Systems Security

Proximity Detection for Wake-Up Features

Touch Screens

24 LEAD (PB-FREE)

SOICW

98ASB42344B

DGND

N/C

SHIELDEN

Garage Door Safety Sensing

PC Peripherals

Patient Monitoring

LEVEL

LPCAP

ROSC

VDDCAP

VPWR

VCCCAP

Point of Sale Terminals

Size Detection

TEST

GND

SHIELD

AGND

Liquid Level Sensing

ORDERING INFORMATION

Temperature

Device Name

Drawing

Package

Figure 1. Pin Connections

Range

MC34940EG/R2

0 to 90°C

98ASB42564B

SOICW-24

12 3 4 5 6 7...9

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