EVAL-AD7689EDZ Datasheet, PDF (14/32 Pages) Analog Devices – 16-Bit, 4-Channel/8-Channel, 250 kSPS PulSAR ADC

AD7682/AD7689
–60
–70
–80
–90
–100
–110
–120
0
V_REF = VDD = 5V, –0.5dB
V_REF = VDD = 2.5V, –0.5dB
V_REF = VDD = 2.5V, –10dB
V_REF = VDD = 5V, –10dB
50
100
150
200
FREQUENCY (kHz)
Figure 18. THD vs. Frequency
95
f_IN = 20kHz
94
93
V_REF = VDD = 5V
92
91
90
89
V_REF = VDD = 2.5V
88
87
86
85
–10
–8
–6
–4
–2
0
INPUT LEVEL (dB)
Figure 19. SNR vs. Input Level
3
2
1
0
–1
–2
–3
–55
UNIPOLAR ZERO
UNIPOLAR GAIN
BIPOLAR ZERO
BIPOLAR GAIN
–35 –15
5 25 45 65
TEMPERATURE (°C)
85 105 125
Figure 20. Offset and Gain Errors vs. Temperature
Data Sheet
3000
2750
2500
2250
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
100
f_S = 200kSPS
90
80
70
2000
60
1750
50
1500
40
1250
30
1000
2.5
3.0
3.5
4.0
4.5
5.0
VDD SUPPLY (V)
Figure 21. Operating Currents vs. Supply
3000
2750
f_S = 200kSPS
20
5.5
180
160
2500
VDD = 5V, INTERNAL 4.096V REF
140
2250
120
2000
VDD = 5V, EXTERNAL REF
100
1750
80
1500
1250
1000
–55
VDD = 2.5, EXTERNAL REF
–35 –15
VIO
5 25 45 65
TEMPERATURE (°C)
60
40
20
85 105 125
Figure 22. Operating Currents vs. Temperature
25
20
VDD = 2.5V, 85°C
15
VDD = 2.5V, 25°C
10
VDD = 5V, 85°C
5
VDD = 5V, 25°C
VDD = 3.3V, 85°C
VDD = 3.3V, 25°C
0
0
20
40
60
80
100
120
SDO CAPACITIVE LOAD (pF)
Figure 23. tDSDO Delay vs. SDO Capacitance Load and Supply
Rev. D | Page 14 of 32