AD7148 Analog Devices, AD7148 Datasheet - Page 9

• Manufacturer Part Number: AD7148
• Manufacturer: Analog Devices

Specifications of AD7148

• Resolution (bits): 16bit
• # Chan: 8
• Sample Rate: 250kSPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: SE-Uni
• Ain Range: ± 8 pF (Delta C)
• Adc Architecture: Sigma-Delta
• Pkg Type: CSP

58000
56000
54000
52000
50000
48000
46000
44000
42000
40000
Figure 11. CDC Output Code vs. Capacitive Load on AC
960
940
920
900
880
860
840
820
800
780
12
10
8
6
4
2
0
–60
–45
Figure 13. Shutdown Supply Current vs. Temperature
–40
Figure 12. Supply Current vs. Temperature
0
–25
–20
–5
100
AC
SHIELD
0
15
TEMPERATURE (°C)
TEMPERATURE (°C)
200
20
CAPACITIVE LOAD (pF)
35
3.6V
3.3V
2.6V
40
55
300
60
3.3V
75
80
400
95
3.6V
100
2.6V
115
SHIELD
500
120
135
Rev. A | Page 9 of 56
160
140
120
100
80
60
40
20
Figure 14. Power Supply Sine Wave Rejection, V
35
30
25
20
15
10
0
5
0
0
25mV
50mV
10000
Figure 15. CDC Linearity, V
20000
SINE WAVE FREQUENCY (Hz)
75mV
100mV
CDC OUTPUT CODE
30000
125mV
150mV
40000
CC
= 3.3 V
50000
175mV
200mV
CC
= 3.6 V
60000
AD7148