AD7889 Analog Devices, AD7889 Datasheet - Page 9

• Manufacturer Part Number: AD7889
• Description: Low Voltage Controller for Touch Screens
• Manufacturer: Analog Devices

Specifications of AD7889

• Resolution (bits): 12bit
• # Chan: 6
• Sample Rate: 105kSPS
• Interface: I²C/Ser 2-Wire,Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni Vdd
• Adc Architecture: SAR
• Pkg Type: CSP

TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, V
475
470
465
460
455
450
445
440
435
430
425
700
600
500
400
300
200
100
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
1.6
–40
–40
Figure 11. Full Power-Down I
CC
Figure 9. Supply Current vs. Temperature
1.8
= 2.6 V, f
–25
–25
Figure 10. Supply Current vs. V
2.0
–10
–10
2.2
SCL
TEMPERATURE (°C)
TEMPERATURE (°C)
= 2 MHz, unless otherwise noted.
10
2.4
10
V
CC
2.6
25
(V)
25
DD
2.8
40
vs. Temperature
3.0
50
55
CC
3.2
75
70
3.4
100
85
3.6
Rev. C | Page 9 of 40
–0.5
–1.0
–1.5
–2.0
2.0
1.5
1.0
0.5
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
0
1.0
0.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0.2
0
0
0
–40
–40
Figure 13. Change in ADC Offset vs. Temperature
Figure 12. Change in ADC Gain vs. Temperature
512
3.6V
–25
–25
1024
–10
–10
Figure 14. ADC INL
1536
TEMPERATURE (°C)
TEMPERATURE (°C)
10
10
CODE
2048
25
25
1.6V
2560
40
40
AD7879/AD7889
1.6V
3072
55
55
3.6V
2.6V
3584
70
70
2.6V
85
85
4096