AD7631 Analog Devices, AD7631 Datasheet - Page 14

• Manufacturer Part Number: AD7631
• Manufacturer: Analog Devices

Specifications of AD7631

• Resolution (bits): 18bit
• # Chan: 1
• Sample Rate: 250kSPS
• Interface: Par,Ser,SPI
• Analog Input Type: Diff-Bip,Usr-Defined Range/Offset
• Ain Range: 10V p-p,20 V p-p,40 V p-p
• Adc Architecture: SAR
• Pkg Type: CSP,QFP

AD7631
Figure 19. Reference Voltage Temperature Coefficient Distribution (247 Devices)
Figure 18. Zero/Offset Error, Positive and Negative Full-Scale Error vs.
–104
–108
–112
–116
–120
–124
–128
–132
–12
–16
–20
20
16
12
–4
–8
60
50
40
30
20
10
8
4
0
–55
–55
0
0
0V TO 10V
–35
–35
1
Temperature, All Normalized to 25°C
–15
Figure 17. THD vs. Temperature
–15
2
REFERENCE DRIFT (ppm/°C)
±5V
5
5
TEMPERATURE (°C)
TEMPERATURE (°C)
3
25
25
ZERO/OFFSET ERROR
±10V
4
FULL-SCALE ERROR
45
45
NEGATIVE
0V TO 5V
5
FULL-SCALE ERROR
65
65
POSITIVE
6
85
85
7
105
105
125
125
8
Rev. A | Page 14 of 32
Figure 21. Typical Reference Voltage Output vs. Temperature (3 Devices)
100000
10000
5.0080
5.0060
5.0040
5.0020
5.0000
4.9980
4.9960
4.9940
4.9920
0.001
1000
0.01
100
132
128
124
120
116
112
108
104
0.1
10
1
–55
10
–55
Figure 20. SFDR vs. Temperature (Excludes Harmonics)
Figure 22. Operating Currents vs. Sample Rate
–35
–35
DVDD
100
–15
AVDD
–15
OVDD
±10V
SAMPLING RATE (SPS)
5
5
TEMPERATURE (°C)
TEMPERATURE (°C)
1000
25
±5V
25
45
45
10000
PDREF = PDBUF = HIGH
65
65
VCC +15V
VEE –15V
0V TO 5V
0V TO 10V
100000
85
85
105
105
1000000
125
125