AD7621 Analog Devices, AD7621 Datasheet - Page 12

• Manufacturer Part Number: AD7621
• Description: 16-Bit, 2 LSB INL, 3 MSPS PulSAR® ADC
• Manufacturer: Analog Devices

Specifications of AD7621

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 3MSPS
• Interface: Byte,Par,Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: SAR
• Pkg Type: CSP,QFP

AD7621
TYPICAL PERFORMANCE CHARACTERISTICS
Figure 7. Typical Reference Voltage Output vs. Temperature (3 Units)
160000
140000
120000
100000
2.0530
2.0525
2.0520
2.0515
2.0510
2.0505
2.0500
2.0495
2.0490
2.0485
2.0480
80000
60000
40000
20000
–0.5
–1.0
–1.5
–2.0
2.0
1.5
1.0
0.5
Figure 6. Histogram of 261,120 Conversions of a DC Input
0
0
0
–55
7FFC 7FFD 7FFE 7FFF 8000
0
–35
at the Code Center (External Reference)
Figure 5. Integral Nonlinearity vs. Code
13
16384
–15
2080
5
TEMPERATURE (°C)
51847
CODE IN HEX
25
CODE
32768
149969
45
54791
8001
65
49152
8002
2415
85
8003
5
σ
= 0.69
105
8004
65536
0
125
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Figure 10. Zero Error, Positive and Negative Full Scale vs. Temperature
160000
140000
120000
100000
80000
60000
40000
20000
–0.5
–1.0
1.5
1.0
0.5
–10
Figure 9. Histogram of 261,120 Conversions of a DC Input
0
10
–2
–4
–6
–8
0
8
6
4
2
0
0
–55
7FFC 7FFD 7FFE 7FFF
0
Figure 8. Differential Nonlinearity vs. Code
+FS
–35
at the Code Center (Internal Reference)
176
–FS
16384
–15
6644
ZERO ERROR
5
TEMPERATURE (°C)
60842
CODE IN HEX
25
32768
CODE
127317
8000
45
59637
8001
65
49152
6376
8002
85
8003
128
σ
= 0.82
105
8004
65536
0
125