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ADS7845 Datasheet(PDF) 4 Page - Texas Instruments

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Part # ADS7845
Description  5-WIRE TOUCH SCREEN INTERFACE, RATIOMETRIC CONVERSION, SINGLE SUPPLY:2V to 5V
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

ADS7845 Datasheet(HTML) 4 Page - Texas Instruments

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4
ADS7845
TYPICAL PERFORMANCE CURVES
At TA = +25°C, +VCC = +2.7V, VREF = +2.5V, fSAMPLE = 125kHz, and fCLK = 16 • fSAMPLE = 2MHz, unless otherwise noted.
SUPPLY CURRENT vs +V
CC
3.5
1.5
2
5
2.5
4
+V
CC (V)
400
350
300
250
200
150
100
50
4.5
3
f
CLOCK = 200kHz
V
REF = +VCC
SUPPLY CURRENT vs TEMPERATURE
20
–40
100
–20
0
40
Temperature (
°C)
400
350
300
250
200
150
100
60
80
POWER-DOWN SUPPLY CURRENT
vs TEMPERATURE
20
–40
100
–20
0
40
Temperature (
°C)
140
120
100
80
60
40
20
60
80
MAXIMUM SAMPLE RATE vs +V
CC
3.5
1.5
2
5
2.5
4
+V
CC (V)
1M
100k
10k
1k
4.5
3
V
REF = +VCC
12-Bit Mode
8-Bit Mode
CHANGE IN GAIN vs TEMPERATURE
20
–40
100
–20
0
40
Temperature (
°C)
0.15
0.10
0.05
0.00
–0.05
–0.10
–0.15
60
80
CHANGE IN OFFSET vs TEMPERATURE
20
–40
100
–20
0
40
Temperature (
°C)
0.6
0.4
0.2
0.0
–0.2
–0.4
–0.6
60
80


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