AD7656-1 Analog Devices, AD7656-1 Datasheet - Page 15

• Manufacturer Part Number: AD7656-1
• Description: 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16-Bit ADC
• Manufacturer: Analog Devices

Specifications of AD7656-1

• Resolution (bits): 16bit
• # Chan: 6
• Sample Rate: 250kSPS
• Interface: Par,Ser,SPI
• Analog Input Type: SE-Bip
• Ain Range: 10V p-p,20 V p-p,Bip 10V,Bip 5.0V
• Adc Architecture: SAR
• Pkg Type: QFP

–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
90
89
88
87
86
85
84
83
1.0
0.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0.2
Figure 12. AD7656-1 SINAD vs. Analog Input Frequency
0
0
10
0
0
f
T
INTERNAL REFERENCE
±5V RANGE
V
AV
V
AV
f
±5V RANGE
SAMPLE
V
AV
f
±5V RANGE
A
SAMPLE
DD
SAMPLE
DD
DD
CC
= 25°C
CC
CC
/V
/V
/V
/DV
500
500
/DV
SS
/DV
SS
SS
= 250kSPS
= ±12V
CC
Figure 11. AD7658-1 Typical DNL
= 250kSPS
= ±12V
CC
Figure 10. AD7658-1 Typical INL
= ±12V
= 250kSPS
CC
/V
/V
/V
ANALOG INPUT FREQUENCY (kHz)
1000
1000
DRIVE
DRIVE
DRIVE
= 5V
= 5V
= 5V
1500
1500
CODE
2000
2000
CODE
±10V RANGE
V
AV
DD
CC
2500
2500
/V
/DV
SS
= ±12V
CC
3000
3000
/V
DRIVE
3500
3500
= 5V
4000
4000
100
Rev. C | Page 15 of 32
Figure 14. AD7656-1 THD vs. Analog Input Frequency for Various Source
Figure 15. AD7656-1 THD vs. Analog Input Frequency for Various Source
–100
–110
–120
–100
–105
–110
–100
–105
–110
–115
–115
–80
–85
–90
–95
–80
–90
–80
–85
–90
–95
10
10
10
Figure 13. AD7656-1 THD vs. Analog Input Frequency
V
AV
T
INTERNAL REFERENCE
±4 × V
V
AV
T
INTERNAL REFERENCE
±2 × V
f
T
INTERNAL REFERENCE
SAMPLE
DD
A
A
A
DD
CC
CC
= 25°C
= 25°C
= 25°C
/V
AD7656-1/AD7657-1/AD7658-1
/V
/DV
/DV
SS
SS
REF
REF
= ±16.5V
= 250kSPS
CC
= ±12V
CC
RANGE
RANGE
R
Impedances, ±4 × V
Impedances, ±2 × V
/V
R
/V
SOURCE
ANALOG INPUT FREQUENCY (kHz)
ANALOG INPUT FREQUENCY (kHz)
ANALOG INPUT FREQUENCY (kHz)
SOURCE
DRIVE
±10V RANGE
V
AV
DRIVE
R
DD
SOURCE
CC
/V
/DV
= 5.25V
SS
= 5V
= 220Ω
= 10Ω
= ±12V
CC
= 1000Ω
/V
R
R
SOURCE
DRIVE
SOURCE
R
SOURCE
R
= 5V
REF
REF
SOURCE
= 220Ω
±5V RANGE
V
AV
= 10Ω
Range
Range
DD
R
CC
= 100Ω
/V
SOURCE
/DV
SS
= 1000Ω
R
= ±12V
CC
R
SOURCE
SOURCE
/V
= 50Ω
DRIVE
= 100Ω
= 50Ω
= 5V
100
100
100