AD7873 Analog Devices, AD7873 Datasheet - Page 9

• Manufacturer Part Number: AD7873
• Description: Touch Screen Digitizer
• Manufacturer: Analog Devices

Specifications of AD7873

• Resolution (bits): 12bit
• # Chan: 6
• Sample Rate: 125kSPS
• Interface: Ser
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref),Uni 2.5V
• Adc Architecture: SAR
• Pkg Type: CSP,SOP

TYPICAL PERFORMANCE CHARACTERISTICS
–0.05
–0.10
–0.15
–0.20
0.20
0.15
0.10
0.05
207
206
205
204
203
202
201
200
199
198
230
220
210
200
190
180
170
160
150
0
–40
–40
2.2
Figure 7. Change in Gain vs. Temperature
Figure 5. Supply Current vs. Temperature
–20
–20
2.6
Figure 6. Supply Current vs. +V
3.0
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
3.4
20
20
+V
CC
(V)
f
V
3.8
40
40
SAMPLE
REF
= +V
= 12.5kHz
4.2
60
60
CC
CC
4.6
80
80
100
100
5.0
Rev. E | Page 9 of 28
1000
–0.2
–0.4
–0.6
141
140
139
138
137
136
135
134
0.6
0.4
0.2
100
0
–40
–40
2.2
Figure 8. Power-Down Supply Current vs. Temperature
Figure 10. Change in Offset vs. Temperature
Figure 9. Maximum Sample Rate vs. +V
–20
–20
2.7
0
0
3.2
TEMPERATURE (°C)
TEMPERATURE (°C)
20
20
+V
CC
3.7
(V)
40
40
4.2
60
60
V
REF
CC
= +V
4.7
80
80
AD7873
CC
5.2
100
100