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參數資料
型號: AD7843ARQ-REEL7
廠商: ANALOG DEVICES INC
元件分類: 消費家電
英文描述: Touch Screen Digitizer
中文描述: SPECIALTY CONSUMER CIRCUIT, PDSO16
封裝: MO-137AB, QSOP-16
文件頁數: 2/16頁
文件大小: 193K
代理商: AD7843ARQ-REEL7
REV. 0
–2–
AD7843–SPECIFICATIONS
Parameter
DC ACCURACY
Resolution
No Missing Codes
Integral Nonlinearity
2
Offset Error
2
Offset Error Match
3
(V
CC
= 2.7 V to 3.6 V, V
REF
= 2.5 V, f
SCLK
= 2 MHz unless otherwise noted; T
A
=
–40 C to +85 C, unless otherwise noted.)
AD7843A
1
Unit
Test Conditions/Comments
12
11
±
2
±
6
1
0.1
±
4
1
0.1
70
Bits
Bits min
LSB max
LSB max
LSB max
LSB typ
LSB max
LSB max
LSB typ
dB typ
V
CC
= 2.7 V
Gain Error
2
Gain Error Match
3
Power Supply Rejection
SWITCH DRIVERS
On-Resistance
2
Y+, X+
Y–, X–
ANALOG INPUT
Input Voltage Ranges
DC Leakage Current
Input Capacitance
REFERENCE INPUT
V
REF
Input Voltage Range
DC Leakage Current
V
REF
Input Impedance
V
REF
Input Current
3
5
6
typ
typ
0 to V
REF
±
0.1
37
Volts
μ
A typ
pF typ
1.0/+V
CC
±
1
5
20
1
1
V min/max
μ
A max
G
typ
μ
A max
μ
A typ
μ
A max
CS
= GND or +V
CC
8
μ
A typ
f
SAMPLE
= 12.5 kHz
CS
= +V
CC
; 0.001
μ
A typ
LOGIC INPUTS
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current, I
IN
Input Capacitance, C
IN4
LOGIC OUTPUTS
Output High Voltage, V
OH
Output Low Voltage, V
OL
PENIRQ
Output Low Voltage, V
OL
Floating-State Leakage Current
Floating-State Output Capacitance
4
Output Coding
2.4
0.4
±
1
10
V min
V max
μ
A max
pF max
Typically 10 nA, V
IN
= 0 V or +V
CC
V
CC
– 0.2
0.4
0.4
±
10
10
Straight (Natural) Binary
V min
V max
V max
μ
A max
pF max
I
SOURCE
= 250
μ
A; V
CC
= 2.2 V to 5.25 V
I
SINK
= 250
μ
A
I
SINK
= 250
μ
A; 100 k
Pull-Up
CONVERSION RATE
Conversion Time
Track/Hold Acquisition Time
Throughput Rate
POWER REQUIREMENTS
V
(Specified Performance)
I
CC
Normal Mode (f
SAMPLE
= 125 kSPS)
Normal Mode (f
SAMPLE
= 12.5 kSPS)
Normal Mode (Static)
Shutdown Mode (Static)
Power Dissipation
5
Normal Mode (f
SAMPLE
= 125 kSPS)
Shutdown
12
3
125
DCLK Cycles max
DCLK Cycles min
kSPS max
2.7/3.6
V min/max
Functional from 2.2 V to 5.25 V
Digital I/Ps = 0 V or V
CC
V
CC
= 3.6 V, 240
μ
A typ
V
CC
= 2.7 V, f
DCLK
= 2 00 kHz
V
CC
= 3.6 V
380
170
150
1
μ
A max
μ
A typ
μ
A typ
μ
A max
1.368
3.6
mW max
μ
W max
V
CC
= 3.6 V
V
CC
= 3.6 V
NOTES
1
Temperature range as follows: A Version: –40
°
C to +85
°
C.
2
See Terminology.
3
Guaranteed by design.
4
Sample tested @ 25
°
C to ensure compliance.
5
See Power vs. Throughput Rate section.
Specifications subject to change without notice.
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