AD7656-1 Analog Devices, AD7656-1 Datasheet - Page 14

• 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

AD7656-1/AD7657-1/AD7658-1
TYPICAL PERFORMANCE CHARACTERISTICS
–100
–120
–140
–160
–180
–100
–120
–140
–160
–180
–0.5
–1.0
–1.5
–2.0
–20
–40
–60
–80
–20
–40
–60
–80
2.0
1.5
1.0
0.5
Figure 4. AD7656-1 FFT for ±5 V Range (V
Figure 5. AD7656-1 FFT for ±5 V Range (V
0
0
0
0
0
0
V
AV
f
2 × V
SAMPLE
DD
CC
/V
REF
/DV
SS
10k
20
20
= ±12V
= 250kSPS
CC
RANGE
Figure 6. AD7656-1 Typical INL
/V
DRIVE
20k
40
40
= 5V
FREQUENCY (kHz)
FREQUENCY (kHz)
T
INL WCP = 0.97LSB
INL WCN = –0.72LSB
30k
A
CODE
60
60
= –40°C
40k
V
AV
±10V RANGE
INTERNAL REFERENCE
T
f
f
SNR = 88.44dB
SINAD = 88.43dB
THD = –111.66dB
V
AV
±5V RANGE
INTERNAL REFERENCE
T
f
f
SNR = 88.25dB
SINAD = 88.24dB
THD = –112.46dB
SAMPLE
IN
SAMPLE
IN
A
A
DD
DD
80
80
CC
CC
= 25°C
= 10kHz
= 25°C
= 10kHz
/V
/V
DD
DD
/DV
/DV
SS
SS
/V
/V
50k
= 250kSPS
= 250kSPS
= ±15V
CC
= ±12V
CC
SS
SS
100
100
/V
/V
= ±15 V)
= ±12 V)
DRIVE
DRIVE
60k 65535
= 5V
= 5V
120
120
Rev. C | Page 14 of 32
–0.5
–1.0
–1.5
–2.0
–0.4
–0.8
–1.2
–1.6
–0.5
–1.0
–1.5
–2.0
–2.0
2.0
1.5
1.0
0.5
1.6
1.2
0.8
0.4
2.0
2.0
1.5
1.0
0.5
0
0
0
0
0
0
V
AV
f
2 × V
V
AV
f
±5V RANGE
V
AV
f
±5V RANGE
SAMPLE
SAMPLE
SAMPLE
DD
DD
DD
CC
CC
CC
/V
/V
/V
2000
2000
REF
/DV
/DV
/DV
SS
SS
SS
10k
= 250kSPS
= ±12V
CC
RANGE
= ±12V
= 250kSPS
= ±12V
= 250kSPS
CC
CC
Figure 7. AD7656-1 Typical DNL
Figure 9. AD7657-1 Typical DNL
Figure 8. AD7657-1 Typical INL
/V
/V
/V
4000
4000
DRIVE
DRIVE
DRIVE
20k
= 5V
= 5V
6000
= 5V
6000
T
DNL WCP = 0.61LSB
DNL WCN = –0.82LSB
30k
A
CODE
8000
8000
CODE
CODE
= –40°C
10000 12000 14000 16000
10000 12000 14000 16000
40k
50k
60k 65535