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FDC2114RGHT Datasheet(PDF) 16 Page - Texas Instruments

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No. de pieza FDC2114RGHT
Descripción Electrónicos  Capacitance-to-Digital Converter for Proximity Level Sensing Applications
PDF  60 Pages
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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FDC2114RGHT Datasheet(HTML) 16 Page - Texas Instruments

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Active Channel
Sensor Signal
Sensor
Activation
Conversion
Amplitude
Correction
Conversion
Amplitude
Correction
Conversion
Amplitude
Correction
Channel 0
Channel 1
Channel 0
Sensor
Activation
Channel 0
Conversion
Channel 1
Sensor
Activation
Channel 1
Conversion
Channel 0
Sensor
Activation
Channel
switch delay
Channel
switch delay
FDC2212, FDC2214, FDC2112, FDC2114
SNOSCZ5A – JUNE 2015 – REVISED JUNE 2015
www.ti.com
Table 4. Sample Data Registers (continued)
CHANNEL(1)
REGISTER(2)
FIELD NAME [ BITS(S) ] AND
FIELD NAME [ BITS(S) ] AND VALUE
VALUE (FDC2112, FDC2114)
(FDC2212, FDC2214) (3)(4)
DATA_CH3, addr 0x06
DATA3 [11:0]:
DATA3 [27:16]:
12 bits of the 16 bit result.
12 MSBs of the 28 bit result
0x000 = under range
3
0xfff = over range
DATA_LSB_CH3, addr 0x07
Not applicable
DATA3 [15:0]:
16 LSBs of the 28 bit conversion result
When the FDC sequences through the channels in multi-channel mode, the dwell time interval for each channel
is the sum of three parts:
1. sensor activation time
2. conversion time
3. channel switch delay
The sensor activation time is the amount of settling time required for the sensor oscillation to stabilize, as shown
in Figure 13. The settling wait time is programmable and should be set to a value that is long enough to allow
stable oscillation. The settling wait time for channel x is given by:
tSx = (CHX_SETTLECOUNTˣ16)/fREFx
(3)
Table 5 illustrates the registers and values for configuring the settling time for each channel.
Figure 13. Multi-channel Mode Sequencing
Figure 14. Single-channel Mode Sequencing
16
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Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: FDC2212 FDC2214 FDC2112 FDC2114



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