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FDC2114-Q1 Fiches technique(PDF) 5 Page - Texas Instruments

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No de pièce FDC2114-Q1
Description  Multi-Channel 12-Bit or 28-Bit Capacitance-to-Digital Converter
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

FDC2114-Q1 Fiches technique(HTML) 5 Page - Texas Instruments

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FDC2112-Q1, FDC2114-Q1, FDC2212-Q1, FDC2214-Q1
www.ti.com
SNOSCZ9 – MAY 2016
Product Folder Links: FDC2112-Q1 FDC2114-Q1 FDC2212-Q1 FDC2214-Q1
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
(1)
Electrical Characteristics values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in
very limited self-heating of the device such that TJ = TA. No guarantee of parametric performance is indicated in the electrical tables
under conditions of internal self-heating where TJ > TA. Absolute Maximum Ratings indicate junction temperature limits beyond which
the device may be permanently degraded, either mechanically or electrically.
(2)
Register values are represented as either binary (b is the prefix to the digits), or hexadecimal (0x is the prefix to the digits). Decimal
values have no prefix.
(3)
Limits are ensured by testing, design, or statistical analysis at 25°C. Limits over the operating temperature range are ensured through
correlations using statistical quality control (SQC) method.
(4)
Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary
over time and also depend on the application and configuration. The typical values are not tested and are not ensured on shipped
production material.
(5)
I2C read/write communication and pullup resistors current through SCL, SDA not included.
(6)
Sensor capacitor: 1 layer, 20.9 × 13.9 mm, Bourns CMH322522-180KL sensor inductor with L=18 µH and 33 pF 1% COG/NP0 Target:
Grounded aluminum plate (176 × 123 mm), Channel = Channel 0 (continuous mode) CLKIN = 40 MHz, CHx_FIN_SEL = b10,
CHx_FREF_DIVIDER = b00 0000 0001 CH0_RCOUNT = 0xFFFF, SETTLECOUNT_CH0 = 0x0100, DRIVE_CURRENT_CH0 = 0x7800.
(7)
Lower VSENSORMIN oscillation amplitudes can be used, but will result in lower SNR.
6.5 Electrical Characteristics
Unless otherwise specified, all limits ensured for TA = 25°C, VDD = 3.3 V
(1)
PARAMETER
TEST CONDITIONS(2)
MIN(3)
TYP(4)
MAX(3)
UNIT
POWER
VDD
Supply voltage
TA = –40°C to 125°C
2.7
3.6
V
IDD
Supply durrent (not including
sensor current)(5)
CLKIN = 10MHz(6)
2.1
mA
IDDSL
Sleep mode supply current(5)
35
60
µA
ISD
Shutdown mode supply
current(5)
0.2
1
µA
CAPACITIVE SENSOR
CSENSORMAX
Maximum sensor capacitance
1-mH inductor, 10-kHz oscillation
250
nF
CIN
Sensor pin parasitic
capacitance
4
pF
NBITS
Number of bits
FDC2112, FDC2114
RCOUNT
≥ 0x0400
12
bits
FDC2212, FDC2214
RCOUNT = 0xFFFF
28
bits
fCS
Maximum channel sample rate FDC2112, FDC2114
single active channel continuous
conversion, SCL = 400 kHz
13.3
kSPS
FDC2212, FDC2214
single active channel continuous
conversion, SCL= 400 kHz
4.08
kSPS
EXCITATION
fSENSOR
Sensor excitation frequency
TA = –40°C to 125°C
0.01
10
MHz
VSENSORMIN
Minimum sensor oscillation
amplitude (pk)(7)
1.2
V
VSENSORMAX
Maximum sensor oscillation
amplitude (pk)
1.8
V
ISENSORMAX
Sensor maximum current drive HIGH_CURRENT_DRV = b0
DRIVE_CURRENT_CH0 = 0xF800
1.5
mA
HIGH_CURRENT_DRV = b1
DRIVE_CURRENT_CH0 = 0xF800
Channel 0 only
6
mA


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