AD7661 Analog Devices, AD7661 Datasheet - Page 14

• Manufacturer Part Number: AD7661
• Manufacturer: Analog Devices

Specifications of AD7661

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 100kSPS
• 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

AD7661
90
89
88
87
86
–55
10000
0.001
–100
–105
–110
–115
–120
1000
0.01
100
0.1
10
–55
1
10
–35
Figure 17. SNR, S/(N+D), and ENOB vs. Temperature
Figure 18. THD and Harmonics vs. Temperature
Figure 19. Operating Current vs. Sample Rate
–35
–15
–15
100
5
TEMPERATURE (°C)
5
TEMPERATURE (°C)
SAMPLE RATE (SPS)
25
25
45
1000
45
65
PDREF = PDBUF = HIGH
65
85
THD
S/[N+D]
ENOB
10000
SNR
DVDD
OVDD
AVDD
THIRD
HARMONIC
85
105
SECOND
HARMONIC
105
02965-0-036
125
15.5
15.0
14.5
14.0
13.5
100000
125
Rev. 0 | Page 14 of 28
Figure 22. Reference Voltage Temperature Coefficient Distribution (291 Units)
Figure 21.Typical Reference Voltage Output vs. Temperature (3 Units)
Figure 20. Zero Error, Full Scale Error with Reference vs. Temperature
2.5015
2.5010
2.5005
2.5000
2.4995
2.4990
2.4985
2.4980
40
60
50
30
20
10
–1
–2
–3
–4
–5
–6
0
6
5
4
3
2
1
0
–55
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 7.5 8.0
–40
–35
–20
–15
0
REFERENCE DRIFT (ppm/°C)
TEMPERATURE (°C)
5
TEMPERATURE (°C)
20
25
40
45
60
FULL-SCALE ERROR
65
ZERO ERROR
80
85
105
100
125
120