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AD7682 Datasheet(PDF) 13 Page - Analog Devices

Part # AD7682
Description  16-Bit, 4-Channel/8-Channel, 250 kSPS PulSAR ADC
PDF  28 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7682 Datasheet(HTML) 13 Page - Analog Devices

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AD7682/AD7689
Rev. 0 | Page 13 of 28
–60
–70
–80
–90
–100
–110
–120
0
50
100
150
200
FREQUENCY (kHz)
VDD = VREF = 5V, –0.5dB
VDD = VREF = 2.5V, –0.5dB
VDD = VREF = 2.5V, –10dB
VDD = VREF = 5V, –10dB
Figure 18. THD vs. Frequency
95
94
93
92
91
90
89
88
87
86
85
–10
INPUT LEVEL (dB)
–8
–6
–2
0
–4
fIN = 20kHz
VDD = VREF = 5V
VDD = VREF = 2.5V
Figure 19. SNR vs. Input Level
3
2
1
0
–1
–2
–3
–55
TEMPERATURE (°C)
–35
–15
5
25
45
65
85
105
125
UNIPOLAR ZERO
UNIPOLAR GAIN
BIPOLAR ZERO
BIPOLAR GAIN
Figure 20. Offset and Gain Errors vs. Temperature
3000
2750
2500
2250
2000
1750
1500
1250
1000
100
90
80
70
60
50
40
30
20
2.5
3.0
3.5
4.0
4.5
5.0
5.5
VDD SUPPLY (V)
2.5V INTERNAL REF
4.096V INTERNAL REF
INTERNAL BUFFER, TEMP ON
INTERNAL BUFFER, TEMP OFF
EXTERNAL REF, TEMP ON
EXTERNAL REF, TEMP OFF
VIO
fS = 200kSPS
Figure 21. Operating Currents vs. Supply
3000
2750
2500
2250
2000
1750
1500
1250
1000
180
160
140
120
100
80
60
40
20
–55
TEMPERATURE (°C)
–35
–15
5
25
45
65
85
105
125
fS = 200kSPS
VDD = 5V, INTERNAL 4.096V REF
VDD = 5V, EXTERNAL REF
VDD = 2.5, EXTERNAL REF
VIO
Figure 22. Operating Currents vs. Temperature
SDO CAPACITIVE LOAD (pF)
120
0
2040
6080
100
25
20
15
10
5
0
VDD = 2.5V, 85°C
VDD = 3.3V, 25°C
VDD = 3.3V, 85°C
VDD = 5V, 85°C
VDD = 5V, 25°C
VDD = 2.5V, 25°C
Figure 23. tDSDO Delay vs. SDO Capacitance Load and Supply



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