AD7687 Analog Devices, AD7687 Datasheet - Page 10

• Manufacturer Part Number: AD7687
• Manufacturer: Analog Devices

Specifications of AD7687

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 250kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: SAR
• Pkg Type: CSP,SOP

AD7687
TYPICAL PERFORMANCE CHARACTERISTICS
300000
250000
200000
150000
100000
50000
–100
–120
–140
–160
–180
–0.5
–1.0
–1.5
–20
–40
–60
–80
1.5
1.0
0.5
0
0
0
0
0
Figure 8. Histogram of a DC Input at the Code Center
41
0
Figure 7. Integral Nonlinearity vs. Code
20
16384
42
0
40
Figure 9. FFT Plot
1049
43
FREQUENCY (kHz)
CODE IN HEX
32768
CODE
258680
60
44
POSITIVE INL = +0.32LSB
NEGATIVE INL = –0.41LSB
1391
80
45
8192 POINT FFT
VDD = REF = 5V
F
F
SNR = 95.5dB
THD = –118.3dB
2nd HARM = –130dB
3rd HARM = –122.7dB
S
IN
= 250KSPS
= 2.1kHz
49152
VDD = REF = 5V
46
100
0
47
0
120
65535
Rev. B | Page 10 of 28
250000
200000
150000
100000
50000
–100
–120
–140
–160
–180
–0.5
–1.0
–1.5
–20
–40
–60
–80
1.5
1.0
0.5
0
0
0
0
0
Figure 11. Histogram of a DC Input at the Code Center
44
0
Figure 10. Differential Nonlinearity vs. Code
20
45
0
16384
60
46
40
Figure 12. FFT Plot
30721
FREQUENCY (kHz)
47
CODE IN HEX
32768
CODE
200403
60
48
POSITIVE DNL = +0.27LSB
NEGATIVE DNL = –0.24LSB
29918
49
80
32768 POINT FFT
VDD = REF = 2.5V
F
F
SNR = 92.8dB
THD = –115.9dB
2nd HARM = –124dB
3rd HARM = –119dB
S
IN
= 250KSPS
49152
= 2kHz
VDD = REF = 2.5V
4A
18
Data Sheet
100
4B
0
4C
0
120
65535