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TSC2005 bảng dữ liệu(PDF) 3 Page - Texas Instruments

tên linh kiện TSC2005
Giải thích chi tiết về linh kiện  1.6V to 3.6V, 12-Bit, Nanopower, 4-Wire TOUCH SCREEN CONTROLLER with SPI™ Interface
PDF  46 Pages
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Trang chủ  https://www.ti.com
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TSC2005 bảng dữ liệu(HTML) 3 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS
TSC2005
SBAS379C – DECEMBER 2006 – REVISED MARCH 2008
At TA = –40°C to +85°C, SNSVDD = VREF = +1.6V to +3.6V, I/OVDD = +1.2V to +3.6V, unless otherwise noted.
TSC2005
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
AUXILIARY ANALOG INPUT
Input voltage range
0
VREF
V
Input capacitance
12
pF
Input leakage current
–1
+1
µA
A/D CONVERTER
Resolution
Programmable: 10 or 12 bits
12
Bits
No missing codes
12-bit resolution
11
Bits
Integral linearity
1.5
LSB(1)
SNSVDD = 1.6V, VREF = 1.6V
–0.8 to +0.3
LSB
Offset error
SNSVDD = 3.0V, VREF = 2.5V
+3.2 to +8.9
LSB
SNSVDD = 1.6V, VREF = 1.6V
–0.2 to 0
LSB
Gain error
SNSVDD = 3.0V, VREF = 2.5V
+3.8 to +4.4
LSB
REFERENCE INPUT
VREF range
1.6
SNSVDD
V
Non-continuous AUX mode, SNSVDD = 3V, VREF = 2.5V,
VREF input current drain
5.6
µA
TA = +25°C, fADC = 2MHz, fSCLK = 10MHz
Input impedance
A/D converter not converting
1
G
Ω
TOUCH SENSORS
PENIRQ 50k
Ω pull-up resistor,
TA = +25°C, SNSVDD = 3V, VREF = 2.5V
51
k
Ω
RIRQ
Y+, X+
6
Ω
Switch
on-resistance
Y–, X–
5
Ω
Switch drivers drive current(2)
100ms duration
50
mA
TEMPERATURE MEASUREMENT
Temperature range
–40
+85
°C
Differential method(3), SNSVDD = 3V VREF = 2.5V
1.6
°C/LSB
Resolution
TEMP1(4), SNSVDD = 3V VREF = 2.5V
0.3
°C/LSB
Differential method(3), SNSVDD = 3V VREF = 2.5V
±2
°C/LSB
Accuracy
TEMP1(4), SNSVDD = 3V VREF = 2.5V
±3
°C/LSB
INTERNAL OSCILLATOR
SNSVDD = 1.6V
3.6
MHz
Clock frequency, fOSC
SNSVDD = 3.0V
3.8
MHz
SNSVDD = 1.6V
0.0056
%/
°C
Frequency drift
SNSVDD = 3.0V
0.012
%/
°C
(1)
LSB means Least Significant Bit. With VREF = +2.5V, one LSB is 610µV.
(2)
Assured by design, but not tested. Exceeding 50mA source current may result in device degradation.
(3)
Difference between TEMP1 and TEMP2 measurement; no calibration necessary.
(4)
Temperature drift is –2.1mV/
°C.
Copyright © 2006–2008, Texas Instruments Incorporated
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