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AD7656ABSTZ Datasheet(PDF) 12 Page - Analog Devices

Part # AD7656ABSTZ
Description  250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16-Bit ADC
PDF  29 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7656ABSTZ Datasheet(HTML) 12 Page - Analog Devices

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Data Sheet
AD7656A
–60
–120
10
100
ANALOG INPUT FREQUENCY (kHz)
–70
–80
–90
–100
–110
VDD/VSS = ±16.5V
AVCC/DVCC/VDRIVE = +5.25V
TA = 25°C
INTERNAL REFERENCE
±4 × VREF RANGE
RSOURCE = 1000Ω
RSOURCE = 10Ω
RSOURCE = 100Ω
RSOURCE = 50Ω
RSOURCE = 220Ω
Figure 10. THD vs. Analog Input Frequency for Various Source Impedances,
±4 × VREF Range
–40
–120
10
100
ANALOG INPUT FREQUENCY (kHz)
–50
–60
–70
–80
–90
–100
–110
VDD/VSS = ±12V
AVCC/DVCC/VDRIVE = +5V
TA = 25°C
INTERNAL REFERENCE
±2 × VREF RANGE
RSOURCE = 1000Ω
RSOURCE = 100Ω
RSOURCE = 50Ω
RSOURCE = 220Ω
RSOURCE = 10Ω
Figure 11. THD vs. Analog Input Frequency for Various Source Impedances,
±2 × VREF Range
–55
125
TEMPERATURE (°C)
–35
–15
5
25
45
65
85
105
2.492
2.494
2.496
2.498
2.500
2.502
2.504
2.506
2.508
2.510
AVCC/DVCC/VDRIVE = +5V
VDD/VSS = ±12V
Figure 12. Reference Voltage vs. Temperature
3.20
2.70
–55
125
TEMPERATURE (°C)
3.15
3.10
3.05
3.00
2.95
2.90
2.85
2.80
2.75
–35
–15
5
25
45
65
85
105
AVCC/DVCC/VDRIVE = +5V
VDD/VSS = ±12V
Figure 13. Conversion Time vs. Temperature
3500
–5
CODE
3
3000
2500
2000
1500
1000
500
–4
–3
–2
–1
0
1
2
VDD/VSS = ±15V
AVCC/DVCC/VDRIVE = +5V
INTERNAL REFERENCE
8192 SAMPLES
25
168
1532
3212
2806
392
57
0
0
0
Figure 14. Histogram of Codes
100
40
30
530
SUPPLY RIPPLE FREQUENCY (kHz)
90
80
70
60
50
80
130
180
230
280
330
380
430
480
VDD
VSS
fSAMPLE = 250kSPS
±2 × VREF RANGE
INTERNAL REFERENCE
TA = 25°C
fIN = 10kHz
100nF ON VDD AND VSS
Figure 15. PSRR vs. Supply Ripple Frequency
Rev. 0 | Page 11 of 28



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