AD9238 Analog Devices, AD9238 Datasheet - Page 11

• Manufacturer Part Number: AD9238
• Description: Dual 12-Bit, 20/40/65 MSPS, 3 V ADC
• Manufacturer: Analog Devices

Specifications of AD9238

• Resolution (bits): 12bit
• # Chan: 2
• Sample Rate: 65MSPS
• Interface: Par
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: (2Vref) p-p,1 V p-p,2 V p-p
• Adc Architecture: Pipelined
• Pkg Type: CSP,QFP

TYPICAL PERFORMANCE CHARACTERISTICS
AVDD, DRVDD = 3.0 V, T = 25°C, A
–100
–120
–100
–120
–100
–120
–20
–40
–60
–80
–20
–40
–60
–80
–20
–40
–60
–80
Figure 5. Single-Tone FFT of Channel A Digitizing f
Figure 7. Single-Tone FFT of Channel A Digitizing f
0
0
Figure 6. Single-Tone FFT of Channel A Digitizing f
0
0
0
0
CROSSTALK
CROSSTALK
While Channel B is Digitizing f
While Channel B Is Digitizing f
While Channel B Is Digitizing f
5
5
5
SECOND
HARMONIC
10
10
10
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
SECOND
HARMONIC
15
15
15
SECOND
HARMONIC
CROSSTALK
20
20
20
IN
differential drive, full scale = 2 V, unless otherwise noted.
IN
IN
IN
= 126 MHz
= 10 MHz
= 76 MHz
25
25
25
THIRD
HARMONIC
IN
IN
IN
= 12.5 MHz
= 120 MHz
= 70 MHz
30
30
30
Rev. C | Page 11 of 48
Figure 8. AD9238-65 Single-Tone SNR/SFDR vs. FS with f
Figure 10. AD9238-20 Single-Tone SNR/SFDR vs. FS with f
Figure 9. AD9238-40 Single-Tone SNR/SFDR vs. FS with f
100
100
100
50
95
90
85
80
75
70
65
60
55
50
95
90
85
80
75
70
65
60
55
95
90
85
80
75
70
65
60
55
50
20
40
0
45
25
5
ADC SAMPLE RATE (MSPS)
ADC SAMPLE RATE (MSPS)
ADC SAMPLE RATE (MSPS)
50
SNR
10
30
55
SNR
SNR
SNR
SFDR
SFDR
35
15
SFDR
60
SNR
IN
IN
IN
= 32.5 MHz
= 20 MHz
= 10 MHz
AD9238
20
65
40