AD7451 Analog Devices, AD7451 Datasheet - Page 10

• 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

AD7441/AD7451
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
Figure 8. PSRR vs. Supply Ripple Frequency Without Supply Decoupling
= 25°C, f
–100
–120
–100
–120
–140
–20
–40
–60
–80
–20
–40
–60
–80
Figure 7. SINAD vs. Analog Input Frequency for the AD7451 for
75
70
65
60
55
0
0
10
0
0
Figure 9. AD7451 Dynamic Performance for V
100mV p-p SINE WAVE ON V
NO DECOUPLING ON V
S
100
= 1 MSPS, f
200
100
SUPPLY RIPPLE FREQUENCY (kHz)
V
DD
300
Various Supply Voltages
= 4.75V
SCLK
FREQUENCY (kHz)
FREQUENCY (kHz)
V
400
200
DD
V
DD
= 18 MHz, V
DD
V
= 3V
DD
= 2.7V
100
500
V
DD
DD
= 3.6V
= 5V
600
300
700
DD
8192 POINT FFT
f
f
SINAD = 71dB
THD = –82dB
SFDR = –83dB
SAMPLE
IN
= 2.7 V to 5.25 V, V
= 100kSPS
800
V
400
DD
DD
= 1MSPS
= 5.25V
= 5 V
900
1000
1000
500
Rev. D | Page 10 of 24
REF
= 2.5 V, unless otherwise noted.
Figure 12. Histogram of 10,000 Conversions of a DC Input for the AD7451
10000
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
9000
8000
7000
6000
5000
4000
3000
2000
1000
1.0
0.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0.2
0
0
2046
0
0
0
Figure 10. Typical DNL for the AD7451 for V
Figure 11. Typical INL for the AD7451 for V
2047
1024
1024
27 CODES
2048
CODES
CODES
CODE
CODE
2048
2048
9949
2049
24 CODES
3072
3072
2050
DD
DD
= 5 V
= 5 V
4096
4096
2051