AD7451 Analog Devices, AD7451 Datasheet - Page 11

• Manufacturer Part Number: AD7451
• Description: Pseudo Differential Input, 1 MSPS, 12-Bit ADC in an 8-Lead SOT-23
• Manufacturer: Analog Devices

Specifications of AD7451

• Resolution (bits): 12bit
• # Chan: 1
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: SAR
• Pkg Type: SOP,SOT

–0.5
–1.0
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
–1
–2
12
11
10
5
4
3
2
1
0
9
8
7
6
0
0
0
0
Figure 13. Change in DNL vs. V
Figure 14. Change in INL vs. V
Figure 15. ENOB vs. V
V
DD
= 5V
V
1
1
1
DD
= 3V
2
2
2
V
V
V
REF
REF
REF
REF
for V
(V)
(V)
(V)
3
DD
3
3
REF
REF
= 5 V and 3 V
for V
for V
POSITIVE DNL
NEGATIVE DNL
POSITIVE DNL
NEGATIVE DNL
DD
DD
= 5 V
= 5 V
4
4
4
5
5
5
Rev. D | Page 11 of 24
–100
–120
–140
–0.1
–0.2
–0.3
–0.4
–0.5
–0.1
–0.2
–0.3
–0.4
–0.5
–20
–40
–60
–80
0.5
0.4
0.3
0.2
0.1
0.5
0.4
0.3
0.2
0.1
0
0
0
0
0
0
Figure 16. AD7441 Dynamic Performance
Figure 17. Typical DNL for the AD7441
Figure 18. Typical INL for the AD7441
100
256
256
200
V
CODE
CODE
REF
512
512
(V)
300
AD7441/AD7451
8192 POINT FFT
f
f
SINAD = 61.7dB
THD = –81.7dB
SFDR = –82dB
SAMPLE
IN
768
768
= 100kSPS
400
= 1MSPS
1024
1024
500