AD7609 Datasheet, PDF (18/36 Pages) Analog Devices – 8-Channel Differential DAS with 18-Bit, Bipolar, Simultaneous Sampling ADC

AD7609
110
105
±10V RANGE
100
±5V RANGE
95
90
AV_CC = V_DRIVE = 5V
85 T_A = 25°C
INTERNAL REFERENCE
f_SAMPLE SCALES WITH OS RATIO
80
NO OS OS × 2 OS × 4 OS × 8 OS × 16 OS × 32 OS × 64
OVERSAMPLING RATIO
Figure 26. Dynamic Range vs. Oversampling Ratio
2.5010
2.5005
AV_CC = 5V
2.5000
AV_CC = 5.25V
2.4995
AV_CC = 4.75V
2.4990
2.4985
2.4980
–40 –25 –10 5
20 35 50 65 80
TEMPERATURE (°C)
Figure 27. Reference Output Voltage vs. Temperature for Different Supply
Voltages
10
AV_CC, V_DRIVE = 5V
f_SAMPLE = 200kSPS
5
0
–5
+25°C V+
+25°C V–
–10
+85°C V–
+85°C V+
–40°C V–
–40°C V+
–15
–20 –15 –10
–5
0
5
10
15
20
DIFFERENTIAL ANALOG INPUT VOLTAGE (Vx+ – (Vx–)) (V)
Figure 28. Analog Input Current vs. Input Voltage Over Temperature
Data Sheet
22
20
18
16
14
12
AV_CC, V_DRIVE = 5V
10 ^TA ^{= 25°C}
INTERNAL REFERENCE
f_SAMPLE VARIES WITH OS RATE
8
NO OS OS × 2 OS × 4 OS × 8
OS × 16
OVERSAMPLING RATIO
OS × 32
OS × 64
Figure 29. Supply Current vs. Oversampling Rate
140
130
120
±10V RANGE
110
±5V RANGE
100
90
80
AV_CC, V_DRIVE = 5V
INTERNAL REFERENCE
70
AD7609 RECOMMENDED DECOUPLING USED
f_SAMPLE = 200kSPS
T_A = 25°C
60
0 100 200 300 400 500 600 700 800 900 1000 1100
AV_CC NOISE FREQUENCY (kHz)
Figure 30. PSRR
0
AV_CC, V_DRIVE = 5V
–10 T_A = 25°C
f_SAMPLE = 200kSPS
–20 INTERNAL REFERENCE
–30
–40
–50
±5V RANGE
–60
–70
±10V RANGE
–80
–90
–100
10
100
1k
10k
FREQUENCY (Hz)
100k
Figure 31. CMRR vs. Common-Mode Ripple Frequency
Rev. A | Page 18 of 36