AD7440 Analog Devices, AD7440 Datasheet - Page 12

• Manufacturer Part Number: AD7440
• Description: Differential Input, 1 MSPS, 12- (AD7450A) & 10-Bit (AD7440) ADCs
• Manufacturer: Analog Devices

Specifications of AD7440

• Resolution (bits): 10bit
• # Chan: 1
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: SAR
• Pkg Type: SOT

AD7440/AD7450A
AD7440/AD7450A–TYPICAL PERFORMANCE CHARACTERISTICS
T
A
Figure 9. PSRR vs. Supply Ripple Frequency without Supply Decoupling
= 25°C, f
Figure 7. AD7450A SINAD vs. Analog Input Frequency for Various
–100
–100
–120
–10
–20
–30
–40
–50
–60
–70
–80
–90
–20
–40
–60
–80
75
70
65
60
55
0
0
10
10
0
Figure 8. CMRR vs. Frequency for V
100mV p-p SINEWAVE ON V
NO DECOUPLING ON V
S
= 1 MSPS, f
100
200
SUPPLY RIPPLE FREQUENCY (kHz)
300
100
SCLK
Supply Voltages
FREQUENCY (kHz)
FREQUENCY (kHz)
400
V
= 18 MHz, unless otherwise noted.
DD
DD
= 3V
100
V
500
DD
DD
V
DD
= 5V
V
600
= 3V
DD
DD
1000
V
V
= 5.25V
DD
DD
= 5 V and 3 V
700
V
= 3.6V
= 2.7V
DD
= 5V
800
V
DD
= 4.75V
900
10000
1000
1000
Rev. C | Page 12 of 28
–100
–120
–140
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
–20
–40
–60
–80
1.0
0.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0.2
Figure 10. AD7450A Dynamic Performance with V
0
0
0
0
0
0
Figure 11. Typical DNL for the AD7450A for V
Figure 12. Typical INL for the AD7450A for V
100
1024
1024
FREQUENCY (kHz)
200
CODE
CODE
2048
2048
300
8192 POINT FFT
f
f
SINAD = +71.7dB
THD = –82dB
SFDR = –83dB
SAMPLE
IN
3072
3072
= 100kSPS
400
DD
DD
= 5 V
= 5 V
DD
= 1MSPS
= 5 V
4096
4096
500