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PDF MC33941 Data sheet ( Hoja de datos )
| Número de pieza | MC33941 | |
| Descripción | Electric Field Imaging Device | |
| Fabricantes | Freescale Semiconductor | |
| Logotipo |  |
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Freescale Semiconductor
Technical Data
Electric Field Imaging Device
The MC33941 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 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
• 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 0 to 110oC
• 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
• Garage Door Safety Sensing
• PC Peripherals
• Patient Monitoring
• Point of Sale Terminals
• Size Detection
• Liquid Level Sensing
ORDERING INFORMATION
Device Name
Temperature
Range
Drawing
MC33941EG/R2
0 to 110°C
98ASB42564B
Package
SOICW-24
Document Number: MC33941
Rev. 3, 11/2006
MC33941
ELECTRONIC FIELD
IMAGING DEVICE
EG SUFFIX (Pb-FREE)
24-TERMINAL SOICW
CASE 751E-04
DGND
N/C
SHIELDEN
C
B
A
LEVEL
LPCAP
ROSC
VDDCAP
VPWR
VCCCAP
N/C
E7
E6
E5
E4
E3
E2
E1
TEST
GND
SHIELD
AGND
Pin Connections
© Freescale Semiconductor, Inc., 2006. All rights reserved.
1 page  
Table 3. Dynamic Electrical Characteristics (7)
Characteristics noted under conditions 5.5 V ≤ VSUP ≤ 18 V, 0°C ≤ TA ≤ 110°C, GND = 0 V unless otherwise noted. Typical
values noted reflect the approximate parameter means at TA = 25°C under nominal conditions unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max Unit
OSC (ROSC)
OSC Frequency Stability
OSC Center Frequency
ROSC = 39 kΩ
ROSC = 20 kΩ
ROSC = 82 kΩ
Harmonic Content
2nd through 4th Harmonic Level
5th and Higher
f STAB
f OSC
OSCHARM
–
–
–
–
–
–
– 10 %
kHz
120 –
240 –
60 –
dB
– -20
– -60
SHIELD DRIVER (SHIELD)
Shield Driver Maximum Harmonic level below Fundamental
10 pF ≤ CLOAD ≤ 500 pF
Shield Driver Gain Bandwidth Product
Measured at 120 kHz
Notes
7. All parameters are guaranteed by design.
SDHARM
dB
– -20 –
SDGBW
MHz
– 4.5 –
Sensors
Freescale Semiconductor
MC33941
5
5 Page 
How to Reach Us:
Home Page:
www.freescale.com
Web Support:
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USA/Europe or Locations Not Listed:
Freescale Semiconductor, Inc.
Technical Information Center, EL516
2100 East Elliot Road
Tempe, Arizona 85284
+1-800-521-6274 or +1-480-768-2130
www.freescale.com/support
Europe, Middle East, and Africa:
Freescale Halbleiter Deutschland GmbH
Technical Information Center
Schatzbogen 7
81829 Muenchen, Germany
+44 1296 380 456 (English)
+46 8 52200080 (English)
+49 89 92103 559 (German)
+33 1 69 35 48 48 (French)
www.freescale.com/support
Japan:
Freescale Semiconductor Japan Ltd.
Headquarters
ARCO Tower 15F
1-8-1, Shimo-Meguro, Meguro-ku,
Tokyo 153-0064
Japan
0120 191014 or +81 3 5437 9125
Asia/Pacific:
Freescale Semiconductor Hong Kong Ltd.
Technical Information Center
2 Dai King Street
Tai Po Industrial Estate
Tai Po, N.T., Hong Kong
+800 2666 8080
For Literature Requests Only:
Freescale Semiconductor Literature Distribution Center
P.O. Box 5405
Denver, Colorado 80217
1-800-441-2447 or 303-675-2140
Fax: 303-675-2150
RoHS-compliant and/or Pb-free versions of Freescale products have the functionality
and electrical characteristics of their non-RoHS-compliant and/or non-Pb-free
counterparts. For further information, see http://www.freescale.com or contact your
Freescale sales representative.
For information on Freescale’s Environmental Products program, go to http://
www.freescale.com/epp.
Information in this document is provided solely to enable system and software
implementers to use Freescale Semiconductor products. There are no express or
implied copyright licenses granted hereunder to design or fabricate any integrated
circuits or integrated circuits based on the information in this document.
Freescale Semiconductor reserves the right to make changes without further notice to
any products herein. Freescale Semiconductor makes no warranty, representation or
guarantee regarding the suitability of its products for any particular purpose, nor does
Freescale Semiconductor assume any liability arising out of the application or use of any
product or circuit, and specifically disclaims any and all liability, including without
limitation consequential or incidental damages. “Typical” parameters that may be
provided in Freescale Semiconductor data sheets and/or specifications can and do vary
in different applications and actual performance may vary over time. All operating
parameters, including “Typicals”, must be validated for each customer application by
customer’s technical experts. Freescale Semiconductor does not convey any license
under its patent rights nor the rights of others. Freescale Semiconductor products are
not designed, intended, or authorized for use as components in systems intended for
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or for any other application in which the failure of the Freescale Semiconductor product
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Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc.
All other product or service names are the property of their respective owners.
© Freescale Semiconductor, Inc., 2006. All rights reserved.
MC33941
Rev. 3
11/2006
11 Page | ||
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