EVAL-AD7656CB View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'EVAL-AD7656CB' PDF : 25 Pages View PDF
AD7656/AD7657/AD7658
2.510
AVCC/DVCC/VDRIVE = +5V
2.508 VDD/VSS = ±12V
2.506
2.504
2.502
2.500
2.498
2.496
2.494
2.492
–55 –35 –15 5
25 45 65 85 105 125
TEMPERATURE (°C)
Figure 16. Reference Voltage vs. Temperature
3.20
3.15
AVCC/DVCC/VDRIVE = +5V
VDD/VSS = ±12V
3.10
3.05
3.00
2.95
2.90
2.85
2.80
2.75
2.70
–55 –35 –15 5
25 45 65 85 105 125
TEMPERATURE (°C)
Figure 17. Conversion Time vs. Temperature
3500
3000
2500
2806
3212
VDD/VSS = ±15V
AVCC/DVCC/VDRIVE = +5V
INTERNAL REFERENCE
8192 SAMPLES
2000
1500
1532
1000
500
392
0
57
0
168
25
0
–5
–4
–3
–2
–1
0
1
2
3
CODE
Figure 18. AD7656 Histogram of Codes
Data Sheet
100
fSAMPLE = 250kSPS
±2 × VREF RANGE
INTERNAL REFERENCE
90
TA = 25°C
fIN = 10kHz
100nF ON VDD AND VSS
80
70
VSS
60
VDD
50
40
30 80 130 180 230 280 330 380 430 480 530
SUPPLY RIPPLE FREQUENCY (kHz)
Figure 19. PSRR vs. Supply Ripple Frequency
87.0
86.5
86.0
85.5
±5V RANGE,
AVCC/DVCC/VDRIVE = +5V
VDD/VSS = ±12V
85.0
±10V RANGE,
AVCC/DVCC/VDRIVE = +5.25V
VDD/VSS = ±16.5V
84.5
84.0
83.5 fSAMPLE = 250kSPS
fIN = 50kHz
INTERNAL REFERENCE
83.0
–40 –20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
Figure 20. AD7656 SNR vs. Temperature
–100
–101
fSAMPLE = 250kSPS
fIN = 50kHz
INTERNAL REFERENCE
–102
–103
–104
–105
–106
±10V RANGE,
AVCC/DVCC/VDRIVE = +5.25V
VDD/VSS = ±16.5V
±5V RANGE,
AVCC/DVCC/VDRIVE = +5V
VDD/VSS = ±12V
–107
–40 –20 0
20 40 60 80 100 120 140
TEMPERATURE (°C)
Figure 21. AD7656 THD vs. Temperature
Rev. D | Page 16 of 32
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