MC33941EGR2 Freescale, MC33941EGR2 Datasheet

MC33941EGR2

Manufacturer Part Number
MC33941EGR2
Description
Manufacturer
Freescale
Datasheet

Specifications of MC33941EGR2

Lead Free Status / RoHS Status
Compliant
Freescale Semiconductor
Technical Data
© Freescale Semiconductor, Inc., 2008. All rights reserved.
Electric Field Imaging Device
sensing of objects is desired. When connected to external electrodes, an
electric field is created. The MC33941 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 MC33941 also
contains support circuits for a microcontroller unit (MCU) to allow the
construction of a two-chip E-field system.
Features
Typical Applications
The MC33941 is intended for cost-sensitive applications where non-contact
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
+5V Regulator to Power External Circuit
Can support up to 28 touch pad sensors (2 way multiplexing)
Extended Temperature Range -40° to 110°C
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
MC33941EG/R2
Device Name
ORDERING INFORMATION
Temperature
-40° to 110°C
Range
98ASB42564B
Drawing
SOICW-24
Package
SHIELDEN
VDDCAP
VCCCAP
LPCAP
LEVEL
VPWR
DGND
ROSC
Document Number: MC33941
N/C
ELECTRONIC FIELD
EG SUFFIX (Pb-FREE)
24-TERMINAL SOICW
IMAGING DEVICE
C
B
A
Pin Connections
MC33941
CASE 751E-05
N/C
E7
E6
E5
E4
E3
E2
E1
TEST
GND
SHIELD
AGND
Rev. 4

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MC33941EGR2 Summary of contents

Page 1

... Point of Sale Terminals • Size Detection • Liquid Level Sensing ORDERING INFORMATION Temperature Device Name Range MC33941EG/R2 -40° to 110°C © Freescale Semiconductor, Inc., 2008. All rights reserved. Drawing Package 98ASB42564B SOICW-24 Document Number: MC33941 Rev. 4 MC33941 ELECTRONIC FIELD IMAGING DEVICE EG SUFFIX (Pb-FREE) ...

Page 2

... CONTROL LOGIC 2.8 kΩ 2.8 kΩ MUX 22 kΩ (Nominal) OUT MUX Ω 700 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 W) = 4.0pF) ZAP Symbol Value ...

Page 4

... REC V -3.3 RECOFF Typ Max Unit 12 18 7.0 8.0 5 5.25 – 3.0 -20 – – 8.0 – 9.0 – 5.0 – – V – – 0.7 V 0.06 – V – 50 – 5.0 – 50 – 4.0 4.4 -3.0 -2.7 Sensors Freescale Semiconductor μA kΩ ...

Page 5

... LOAD Shield Driver Gain Bandwidth Product Measured at 120 kHz Notes 7. All parameters are guaranteed by design. Sensors Freescale Semiconductor (7) ≤ -40°C ≤ T ≤ 110°C, GND = 0 V unless otherwise noted. SUP A = 25°C under nominal conditions unless otherwise noted. A Symbol ...

Page 6

... Flexible Vinyl Film d Air k Water Ice Automotive Oil Low Pass Filter Low Pass Filter Detected Signal Detected Signal Level Decreases Level Decreases with Increasing with Increasing Capacitance 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 Sensors Freescale Semiconductor ...

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 150pF 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

... VCCCAP provides a regulated 5 power external circuits 75 mA Max Connected to the ground return of the AGND analog circuitry Connects to cable shields to cancel SHIELD cable capacitance. Main IC ground GND Connect to circuit ground TEST Electrode pins E1–E7 39k 10nF Field Electrodes (E1 through E7) Freescale Semiconductor Sensors ...

Page 9

... Sensors Freescale Semiconductor PACKAGE DIMENSIONS CASE 751E-05 ISSUE G 24-LEAD SOIC PAGE MC33941 9 ...

Page 10

... MC33941 10 PACKAGE DIMENSIONS CASE 751E-05 ISSUE G 24-LEAD SOIC PAGE Sensors Freescale Semiconductor ...

Page 11

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

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