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AD7949 データシート(PDF) 11 Page - Analog Devices

部品番号 AD7949
部品情報  14-Bit, 8-Channel, 250 kSPS PulSAR ADC
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メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
Logo AD - Analog Devices

AD7949 データシート(HTML) 11 Page - Analog Devices

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AD7949
Rev. B | Page 11 of 32
–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 17. THD vs. Frequency
90
89
88
87
86
85
84
83
82
81
80
79
78
–10
INPUT LEVEL (dB)
–8
–6
–2
0
–4
fIN = 20kHz
VDD = VREF = 2.5V
VDD = VREF = 5V
Figure 18. SNR vs. Input Level
2
1
0
–1
–2
–55
TEMPERATURE (°C)
–35
–15
5
25
45
65
85
105
125
UNIPOLAR ZERO
UNIPOLAR GAIN
BIPOLAR ZERO
BIPOLAR GAIN
Figure 19. Offset and Gain Errors vs. Temperature
2750
2500
2250
2000
1750
1500
1250
1000
750
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 20. 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 21. Operating Currents vs. Temperature
SDO CAPACITIVE LOAD (pF)
120
0
20
40
60
80
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 22. tDSDO Delay vs. SDO Capacitance Load and Supply


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