AD7666 Analog Devices, AD7666 Datasheet - Page 14

• Manufacturer Part Number: AD7666
• Manufacturer: Analog Devices

Specifications of AD7666

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 500kSPS
• Interface: Par,Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (Vref) p-p,2.5V p-p,Uni (Vref),Uni 2.5V
• Adc Architecture: SAR
• Pkg Type: CSP,QFP

AD7666
100000
10000
0.001
–100
–105
–110
–115
1000
0.01
100
0.1
10
92
91
90
89
88
87
1
–55
–55
10
SECOND
HARMONIC
Figure 17. SNR, S/(N+D), and ENOB vs. Temperature
–35
–35
Figure 18. THD and Harmonics vs. Temperature
Figure 19. Operating Current vs. Sample Rate
THD
AVDD
DVDD
100
–15
–15
SAMPLING RATE (SPS)
5
5
TEMPERATURE (°C)
TEMPERATURE (°C)
1k
25
25
45
45
ENOB
OVDD
10k
PDREF = PDBUF = HIGH
65
65
THIRD
HARMONIC
85
85
100k
S/[N+D]
105
105
SNR
125
125
1M
15.5
15.0
14.5
14.0
13.5
13.0
Rev. 0 | Page 14 of 28
Figure 22. Reference Voltage Temperature Coefficient Distribution (93 Units)
Figure 20. Zero Error, Full-Scale Error without Reference vs. Temperature
2.5016
2.5014
2.5012
2.5010
2.5008
2.5006
2.5004
2.5002
2.5000
2.4998
2.4996
2.4994
Figure 21.Typical Reference Voltage Output vs. Temperature (2 Units)
25
20
15
10
5
0
–1
–2
–3
–4
–5
–6
6
5
4
3
2
1
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0
–55
–40
–35
–20
–15
REFERENCE DRIFT (ppm/°C)
0
TEMPERATURE (°C)
5
20
25
40
45
FULL-SCALE
ERROR
60
65
ZERO ERROR
80
85
100
105
120
8.0
125