AD1556 Analog Devices, AD1556 Datasheet - Page 14

• Manufacturer Part Number: AD1556
• Description: Digital Filter/Decimator for 24-Bit Sigma-Delta A/D Converter
• Manufacturer: Analog Devices

Specifications of AD1556

• Resolution (bits): 24bit
• # Chan: 2
• Sample Rate: 256kSPS
• Interface: Byte,Ser
• Analog Input Type: Diff-Bip,SE-Bip
• Ain Range: Bip 2.25V/(PGA Gain)
• Adc Architecture: Sigma-Delta,Sigma-Delta Modulator
• Pkg Type: LCC

AD1555/AD1556
TPC 7. Common-Mode Rejection Distribution (272 Units)
TPC 9. AD1556 Pass Band Ripple, F
TPC 8. Common-Mode Rejection vs. Frequency
–0.05
–0.10
–0.15
–0.20
0.20
0.15
0.10
0.05
0.00
120
115
110
105
100
20
18
16
14
12
10
95
90
8
6
4
2
0
–128
0
0
G = 8.5
G = 2.5
100
–120
200
25
300
G = 128
–113
G = 34
FREQUENCY – Hz
FREQUENCY – Hz
400
50
CMRR – dB
500
–105
600
75
700
O
–98
= 250 Hz (4 ms)
G = 1
800
100
900
–90
1000
125
–14–
TPC 12. AD1556 Pass Band Ripple, F
TPC 10. AD1556 Pass Band Ripple, F
TPC 11. AD1556 Pass Band Ripple, F
–0.05
–0.10
–0.15
–0.20
–0.05
–0.10
–0.15
–0.20
–0.05
–0.10
–0.15
–0.20
0.20
0.15
0.10
0.05
0.00
0.20
0.15
0.10
0.05
0.00
0.20
0.15
0.10
0.05
0.00
0
0
0
100
200
50
FREQUENCY – Hz
FREQUENCY – Hz
FREQUENCY – Hz
100
200
400
150
300
600
O
O
O
= 2 kHz (1/2 ms)
= 500 Hz (2 ms)
= 1 kHz (1 ms)
200
400
800
1000
250
500
REV. B