User manual

MGC3130 Hillstar Development Kit User’s Guide
DS40001721A-page 42  2013 Microchip Technology Inc.
FIGURE B-2: SENSITIVITY PROFILE FROM NORTH TO SOUTH
B.3 ELECTRODE CAPACITIES
The capacitances between the Rx electrodes and GND (C
RxG
) does not include the 5
pF input capacitance of the MGC3130 Rx input buffer (C
Buf
).
C
TxG
= 590 pF
320
339
354
355
353
329
292
266
227
193
150
131
103
84
64
78
90
110
135
171
207
255
283
319
350
375
382
382
363
334
0
50
100
150
200
250
300
350
400
450
500
signal deviation / digits
distance to North
North -> South
SD North
SD East
SD South
SD West
SD Center
SD: Signal Deviation
TABLE B-3: HILLSTAR ELECTRODE CAPACITIES
Channel CRxG CRxTx
North 9 pF 20 pF
East 9 pF 18 pF
South 9 pF 20 pF
West 8 pF 18 pF
Center 7 pF 65 pF