AD7148 Analog Devices, AD7148 Datasheet - Page 8

• 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

AD7148
TYPICAL PERFORMANCE CHARACTERISTICS
0.12
0.10
0.08
0.06
0.04
0.02
935
915
895
875
855
835
815
795
180
160
140
120
100
80
60
40
20
Figure 6. Low Power Supply Current vs. Supply Voltage,
0
Figure 7. Low Power Supply Current vs. Supply Voltage
0
2.6
2.5
2.5
2.7
Figure 5. Supply Current vs. Supply Voltage
DECIMATION = 128
2.7
2.7
2.8
2.9
Decimation Rate = 256
Decimation Rate = 128
DECIMATION = 64
2.9
2.9
200ms
400ms
600ms
800ms
200ms
400ms
3.0
3.1
V
V
V
CC
CC
CC
3.1
3.1
(V)
(V)
(V)
3.2
3.3
600ms
800ms
3.3
3.3
DECIMATION = 256
3.4
3.5
3.5
3.5
3.6
3.7
3.7
3.7
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1150
1100
1050
1000
950
900
2.5
2.0
1.5
1.0
0.5
70
60
50
40
30
20
10
Figure 9. Low Power Supply Current vs. Supply Voltage,
0
0
Figure 8. Shutdown Supply Current vs. Supply Voltage
2.7
2.5
Figure 10. Supply Current vs. Capacitive Load on CIN
2.8
0
2.7
2.9
100
AC
Decimation Rate = 64
SHIELD
3.0
2.9
200ms
400ms
200
3.1
CAPACITIVE LOAD (pF)
V
V
CC
CC
3.1
3.2
(V)
(V)
800ms
300
3.3
3.3
3.4
400
3.5
3.5
600ms
500
3.6
3.7