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AD7843ARQ-REEL7 датащи(PDF) 4 Page - Analog Devices

номер детали AD7843ARQ-REEL7
подробное описание детали  Touch Screen Digitizer
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD7843ARQ-REEL7 датащи(HTML) 4 Page - Analog Devices

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AD7843
Rev. B | Page 3 of 20
SPECIFICATIONS
VCC = 2.7 V to 3.6 V, VREF = 2.5 V, fSCLK = 2 MHz, TA = −40°C to +85°C, unless otherwise noted.
Table 1.
Parameter
AD7843A1
Unit
Test Conditions/Comments
DC ACCURACY
Resolution
12
Bits
No Missing Codes
11
Bits min
Integral Nonlinearity2
±2
LSB max
Offset Error2
±6
LSB max
VCC = 2.7 V
Offset Error Match3
1
LSB max
0.1
LSB typ
Gain Error2
±4
LSB max
Gain Error Match3
1
LSB max
0.1
LSB typ
Power Supply Rejection
70
dB typ
SWITCH DRIVERS
On-Resistance2
Y+, X+
5
Ω typ
Y−, X−
6
Ω typ
ANALOG INPUT
Input Voltage Ranges
0 to VREF
V
DC Leakage Current
±0.1
µA typ
Input Capacitance
37
pF typ
REFERENCE INPUT
VREF Input Voltage Range
1.0/+VCC
V min/max
DC Leakage Current
±1
µA max
VREF Input Impedance
5
GΩ typ
CS = GND or +VCC
VREF Input Current3
20
µA max
8 µA typ
1
µA typ
fSAMPLE = 12.5 kHz
1
µA max
CS = +VCC; 0.001 µA typ
LOGIC INPUTS
Input High Voltage, VINH
2.4
V min
Input Low Voltage, VINL
0.4
V max
Input Current, IIN
±1
µA max
Typically 10 nA, VIN = 0 V or +VCC
Input Capacitance, CIN4
10
pF max
LOGIC OUTPUTS
Output High Voltage, VOH
VCC − 0.2
V min
ISOURCE = 250 µA; VCC = 2.2 V to 5.25 V
Output Low Voltage, VOL
0.4
V max
ISINK = 250 µA
PENIRQ Output Low Voltage, VOL
0.4
V max
ISINK = 250 µA; 100 kW pull-up
Floating-State Leakage Current
±10
µA max
Floating-State Output Capacitance4
10
pF max
Output Coding
Straight (Natural) Binary
CONVERSION RATE
Conversion Time
12
DCLK Cycles max
Track-and-Hold Acquisition Time
3
DCLK Cycles min
Throughput Rate
125
kSPS max
Footnotes on next page.


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