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MC33941 Datasheet(PDF) 8 Page - Freescale Semiconductor, Inc |
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MC33941 Datasheet(HTML) 8 Page - Freescale Semiconductor, Inc |
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8 / 11 page  MC33941 Sensors 8 Freescale Semiconductor BASIC CONNECTIONS PIN DESCRIPTIONS Figure 5. Pin Descriptions Figure 6 . Simplified Application Diagram Table 5. Electrode Selection Terminal/SIGNAL C B A No electrodes selected 0 0 0 E1 0 0 1 E2 0 1 0 E3 0 1 1 E4 1 0 0 E5 1 0 1 E6 1 1 0 E7 1 1 1 N/C E7 E6 E5 E4 E3 E2 E1 TEST GND SHIELD AGND DGND N/C SHIELDEN C B A LEVEL LPCAP ROSC VDDCAP VPWR VCCCAP Table 6. Pin Description Pin Number Pin Name Definition 1 DGND Connected to the ground return 2, 24 N/C These pins should be left open. 3 SHIELDEN Used to enable the shield signal 4,5,6 C, B, A Controls electrode or reference activity 7 LEVEL This is the detected, amplified, and offset representation of the signal voltage on the selected electrode 8 LPCAP A capacitor on this pin forms a low pass filter with the internal series resistance from the detector to this pin 9 ROSC A resistor from this pin to circuit ground determines the operating frequency of the oscillator 10 VDDCAP A 47 μF capacitor is connected to this pin to filter the internal analog regulated supply 11 VPWR 12 V power applied to this pin will be converted to the internal regulated voltages needed to operate the part 12 VCCCAP A 47 μF capacitor is connected to this pin and VCCCAP provides a regulated 5.0 V to power external circuits 75 mA Max 13 AGND Connected to the ground return of the analog circuitry 14 SHIELD Connects to cable shields to cancel cable capacitance. 15 GND Main IC ground 16 TEST Connect to circuit ground 17-23 E1–E7 Electrode pins MC33941 Field Electrodes (E1 through E7) MCU SHIELDEN AGND TEST ROSC GND VDDCAP E1 E7 SHIELD VPWR Analog In Electrode Select Shield Enable LPCAP LEVEL A, B, C VCCCAP 3 +12V 39k 10nF 47uF 47uF Power +5V |
Similar Part No. - MC33941_08 |
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Similar Description - MC33941_08 |
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