AD7608 Analog Devices, AD7608 Datasheet - Page 14

• Manufacturer Part Number: AD7608
• Description: 8-Channel DAS with 18-Bit, Bipolar, Simultaneous Sampling ADC
• Manufacturer: Analog Devices

Specifications of AD7608

• Resolution (bits): 18bit
• # Chan: 8
• Sample Rate: 200kSPS
• Interface: Par,Ser,SPI
• Analog Input Type: Diff-Bip
• Ain Range: Bip 10V,Bip 5.0V
• Adc Architecture: SAR
• Pkg Type: QFP

AD7608
TYPICAL PERFORMANCE CHARACTERISTICS
–100
–120
–140
–160
–100
–120
–140
–160
–100
–120
–140
–160
–20
–40
–60
–80
–20
–40
–60
–80
–20
–40
–60
–80
0
0
0
0
0
0
Figure 10. FFT Over Sampling by 16, ±10 V Range
10k
10k
1k
20k
20k
Figure 8. FFT Plot, ±10 V Range
Figure 9. FFT Plot, ±5 V Range
30k
30k
INPUT FREQUENCY (Hz)
INPUT FREQUENCY (Hz)
INPUT FREQUENCY (Hz)
2k
40k
40k
50k
50k
3k
60k
60k
AV
INTERNAL REFERENCE
f
T
±10V RANGE
SNR = 91.23dB
SINAD = 91.17dB
THD = 108.69dB
16384 POINT FFT
f
AV
INTERNAL REFERENCE
f
T
±5V RANGE
SNR = 90.46dB
SINAD = 90.43dB
THD = 110.74dB
16384 POINT FFT
f
AV
INTERNAL REFERENCE
f
T
±10V RANGE
SNR = 100.26dB
SINAD = 100.15dB
THD = –115.21dB
16384 POINT FFT
f
SAMPLE
IN
A
SAMPLE
IN
SAMPLE
IN
A
A
CC
= 25°C
= 1kHz
CC
CC
= 25°C
= 25°C
= 1kHz
= 131Hz
4k
, V
70k
70k
, V
, V
DRIVE
DRIVE
DRIVE
= 200 kSPS
= 200 k SPS
= 12.5 kSPS
80k
80k
= 5V
5k
= 5V
= 5V
90k
90k
100k
100k
6k
Rev. A | Page 14 of 32
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
–0.1
–0.2
–0.3
–0.4
–0.5
–0.6
–0.7
–0.8
–0.9
–1.0
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
0
AV
INTERNAL REFERENCE
f
T
±10V RANGE
SAMPLE
A
CC
= 25°C
, V
Figure 12. Typical DNL, ±10 V Range
Figure 11. Typical INL, ±10 V Range
DRIVE
= 200 kSPS
Figure 13. Typical INL, ±5 V Range
= 5V
CODE
CODE
CODE
AV
INTERNAL REFERENCE
f
T
±10V RANGE
AV
INTERNAL REFERENCE
f
T
±5V RANGE
SAMPLE
SAMPLE
A
A
CC
= 25°C
CC
= 25°C
, V
, V
DRIVE
DRIVE
= 200 kSPS
= 200 kSPS
Data Sheet
= 5V
= 5V