DEMO1985MC34940E Freescale Semiconductor, DEMO1985MC34940E Datasheet

KIT DEMO FOR MC34940E FAMILY

DEMO1985MC34940E

Manufacturer Part Number
DEMO1985MC34940E
Description
KIT DEMO FOR MC34940E FAMILY
Manufacturer
Freescale Semiconductor
Datasheets

Specifications of DEMO1985MC34940E

Sensor Type
Touch, Capacitive
Interface
Analog
Voltage - Supply
9 V ~ 18 V
Embedded
No
Utilized Ic / Part
MC34940
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Sensitivity
-
Sensing Range
-
Lead Free Status / Rohs Status
 Details
Freescale Semiconductor
Technical Data
© Freescale Semiconductor, Inc., 2006. All rights reserved.
Electric Field Imaging Device
sensing of objects is desired. When connected to external electrodes, an
electric field is created. The MC34940 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 MC34940 also
contains support circuits for a microcontroller unit (MCU) to allow the
construction of a two-chip E-field system.
Features
Typical Applications
MC34940EG/R2
The MC34940 is intended for cost-sensitive applications where non-contact
Device Name
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
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
Garage Door Safety Sensing
PC Peripherals
Patient Monitoring
Point of Sale Terminals
Size Detection
Liquid Level Sensing
Temperature Range
ORDERING INFORMATION
0 to 90°C
CASE 751E-04
Drawing
SOICW-24
Package
SHIELDEN
VDDCAP
VCCCAP
LPCAP
LEVEL
VPWR
DGND
ROSC
Document number: MC34940
N/C
ELECTRONIC FIELD
EG SUFFIX (Pb-FREE)
24-TERMINAL SOICW
IMAGING DEVICE
C
B
A
Pin Connections
MC34940
CASE 751E-04
Rev 4, 11/2006
N/C
E7
E6
E5
E4
E3
E2
E1
TEST
GND
SHIELD
AGND

Related parts for DEMO1985MC34940E

DEMO1985MC34940E Summary of contents

Page 1

... Point of Sale Terminals • Size Detection • Liquid Level Sensing ORDERING INFORMATION Device Name Temperature Range MC34940EG/ 90°C © Freescale Semiconductor, Inc., 2006. All rights reserved. Drawing Package CASE 751E-04 SOICW-24 Document number: MC34940 Rev 4, 11/2006 MC34940 ELECTRONIC FIELD IMAGING DEVICE ...

Page 2

... CONTROL LOGIC 2.8 kΩ 2.8 kΩ MUX 22 kΩ (Nominal) OUT MUX 700 Ω IN Ω 700 V CC REG V DD REG Figure 1. Simplified Functional Block Diagram ROSC OSC SHIELDEN 150 Ω SHIELD RECT LPCAP LPF GAIN AND OFFSET LEVEL Freescale Semiconductor Sensors ...

Page 3

... Thermal resistance between the die and the printed circuit board per JEDEC JESD51-8. Board temperature is measured on the top surface of the board near the package. 4. Terminal soldering temperature limit is for 10 seconds maximum duration. The device is not designed for immersion soldering. Exceeding these limits may cause malfunction or permanent damage to the device. Sensors Freescale Semiconductor = 1500 Ω) = 4.0 pF) ZAP Symbol Value ...

Page 4

... THH V – HYS -5.0 DET – 3.6 REC V -3.3 RECOFF Typ Max Unit 7.0 8.0 % – 3.0 dB -20 – V – 8.0 – 9 – 5.0 – – – 0 0.06 – µA – 50 – 5.0 50 – kΩ 4.0 4 -3.0 -2.7 V Sensors Freescale Semiconductor ...

Page 5

... Shield Driver Maximum Harmonic level below Fundamental 10 pF ≤ C ≤ 500 pF LOAD Shield Driver Gain Bandwidth Product Measured at 120 kHz Sensors Freescale Semiconductor ≤ 0°C ≤ T ≤ 90°C, GND = 0 V unless otherwise noted. Typical A SUP = 25°C under nominal conditions unless otherwise noted. A ...

Page 6

... Dielectric Material Acrylic Glass Nylon Plastic Polyester Film Flexible Vinyl Film Air d k Water Ice Automotive Oil Low Pass Filter Detected Signal Level Decreases with Increasing Capacitance Thickness (mil) k 84.5 2.4-4.5 74.5 7.5 68 3.0-5.0 10 3.2 9 2.8-4 3.2 - 2.1 Freescale Semiconductor Sensors ...

Page 7

... Figure 4. Output Voltage vs. Capacitance at 3 Discrete Frequencies Sensors Freescale Semiconductor at ROSC respectively wider capacitance range is needed, simply change the ROSC resistor value to 82k to have the signal generator operate at 60 kHz which will extend the capacitance range to 150 pF as seen on figure also shows that one can achieve higher sensitivity at lower capacitances by setting the ROSC resistor value to 20k ...

Page 8

... A 47 µF capacitor is connected to this pin to filter the internal digital regulated supply Connected to the ground return of the AGND analog circuitry Connects to cable shields to cancel cable capacitance. Main IC ground GND Connect to circuit ground TEST Electrode pins E1–E7 39k 10 nF Field Electrodes (E1 through E7) Freescale Semiconductor Sensors ...

Page 9

... Sensors Freescale Semiconductor PACKAGE DIMENSIONS EG SUFFIX CASE 751E-04 ISSUE F PAGE MC34940 9 ...

Page 10

... MC34940 10 PACKAGE DIMENSIONS EG SUFFIX CASE 751E-04 ISSUE F PAGE PAGE Sensors Freescale Semiconductor ...

Page 11

... Sensors Freescale Semiconductor MC34940 11 ...

Page 12

... Freescale Semiconductor product could create a situation where personal injury or death may occur. Should a Buyer ...

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