AD9258 Analog Devices, AD9258 Datasheet - Page 22

• Manufacturer Part Number: AD9258
• Description: 14-Bit, 125 MSPS, 1.8 V Dual Analog-to-Digital Converter (ADC)
• Manufacturer: Analog Devices

Specifications of AD9258

• Resolution (bits): 14bit
• # Chan: 2
• Sample Rate: 125MSPS
• Interface: Par
• Analog Input Type: Diff-Bip
• Ain Range: (2Vref) p-p,1 V p-p,2 V p-p
• Adc Architecture: Pipelined
• Pkg Type: CSP

AD9258
Figure 39. AD9258-125 Single-Tone FFT with f
Figure 40. AD9258-125 Single-Tone FFT with f
Figure 38. AD9258-125 Single-Tone FFT with f
–100
–120
–140
–105
–120
–135
–150
–105
–120
–135
–150
–20
–40
–60
–80
–15
–30
–45
–60
–75
–90
–15
–30
–45
–60
–75
–90
0
0
0
0
0
0
SECOND HARMONIC
SECOND HARMONIC
SECOND HARMONIC
125MSPS
70.1MHz @ –6dBFS
SNR = 71.6dB (77.6dBFS)
SFDR = 97dBc
125MSPS
70.1MHz @ –23dBFS
SNR = 56.1dB (79.1dBFS)
SFDR = 67.7dBc
125MSPS
70.1MHz @ –23dBFS
SNR = 55.4dB (78.4dBFS)
SFDR = 86.2dBc
6
6
10
with Dither Disabled, 1M Sample
with Dither Enabled, 1M Sample
12
12
18
18
with Dither Enabled
20
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
24
24
THIRD HARMONIC
THIRD HARMONIC
THIRD HARMONIC
30
30
30
36
36
40
IN
IN
IN
42
42
= 70.1 MHz @ −23 dBFS
= 70.1 MHz @ −23 dBFS
= 70.1 MHz @ −6 dBFS
48
48
50
54
54
60
60
60
Rev. A | Page 22 of 44
Figure 41. AD9258-125 Single-Tone SNR/SFDR vs. Input Amplitude (A
Figure 42. AD9258-125 Single-Tone SNR/SFDR vs. Input Amplitude (A
Figure 43. AD9258-125 Single-Tone SNR/SFDR vs. Input Amplitude (A
120
100
120
100
120
110
100
80
60
40
20
80
60
40
20
90
80
70
–100
–100
0
0
–100
with f
–90
–90
–90
IN
SFDR (dBc)
SFDR (dBc)
= 30 MHz with and without Dither Enabled
–80
–80
–80
SNR (DITHER 0FF)
SNR (DITHER ON)
–70
–70
–70
INPUT AMPLITUDE (dBFS)
INPUT AMPLITUDE (dBFS)
with f
INPUT AMPLITUDE (dBFS)
with f
SNR (dBFS)
–60
–60
SNR (dBFS)
–60
IN
SFDR (dBFS)
IN
SFDR (dBFS)
= 98.12 MHz
= 2.4 MHz
SFDR (DITHER 0FF)
SFDR (DITHER ON)
–50
–50
–50
SNR (dBc)
–40
–40
–40
SNR (dBc)
–30
–30
–30
–20
–20
–20
–10
–10
–10
0
0
0
IN
IN
IN
)
)
)