AD9237 Analog Devices, AD9237 Datasheet - Page 11

• Manufacturer Part Number: AD9237
• Description: 12-Bit, 20/40/65 MSPS 3 V Low Power A/D Converter
• Manufacturer: Analog Devices

Specifications of AD9237

• Resolution (bits): 12bit
• # Chan: 1
• Sample Rate: 65MSPS
• Interface: Par
• Analog Input Type: Diff-Uni
• Ain Range: 1 V p-p,2 V p-p,4 V p-p
• Adc Architecture: Pipelined
• Pkg Type: CSP

TYPICAL PERFORMANCE CHARACTERISTICS
AVDD = 3.0 V, DRVDD = 2.5 V, maximum sample rate with DCS disabled, T
VREF = 1.0 V internal, FFT length 16 K, unless otherwise noted.
–100
–120
–100
–120
–100
–120
–20
–40
–60
–80
–20
–40
–60
–80
–20
–40
–60
–80
0
0
0
0
0
0
SNR = 66.9dBc
SFDR = 87.0dBc
SNR = 66.8dBc
SFDR = 83.1dBc
2
5
Figure 10. AD9237-65 70 MHz FFT
Figure 8. AD9237-20 10 MHz FFT
Figure 9. AD9237-40 20 MHz FFT
2
4
10
6
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
4
8
15
10
12
6
20
14
SNR = 66.0dBc
SFDR = 78.6dBc
25
16
8
18
30 32.5
1
20
0
Rev. A | Page 11 of 24
A
Figure 11. AD9237-20 SNR/SFDR vs. Clock Frequency with f
Figure 12. AD9237-40 SNR/SFDR vs. Clock Frequency with f
Figure 13. AD9237-65 SNR/SFDR vs. Clock Frequency with f
= 25°C, 2 V p-p differential input, A
90
85
80
75
70
65
90
85
80
75
70
65
60
90
85
80
75
70
65
60
10.0
20
40
45
12.5
25
CLOCK FREQUENCY (MSPS)
CLOCK FREQUENCY (MSPS)
CLOCK FREQUENCY (MSPS)
SFDR
SNR
SFDR
SNR
50
SNR
SFDR
15.0
30
55
IN
= –0.5 dBFS,
17.5
35
60
AD9237
IN
IN
IN
= 10 MHz
= 20 MHz
= 35 MHz
20.0
40
65