
AD9218
Rev. C | Page 16 of 28
30
35
40
45
50
55
60
65
70
75
(dB
)
4
3
12
05
6
ENCODE POSITIVE PULSEWIDTH (ns)
02
00
1-
0
32
7
8
SFDR
SINAD
40
45
50
55
60
65
70
75
(d
B
)
02
00
1-
0
35
02
4
6
8
10
12
14
ENCODE POSITIVE PULSEWIDTH (ns)
SFDR
SINAD
Figure 32. SINAD and SFDR vs. Encode Pulse Width High, AIN = –0.5 dBFS
Single-Ended, 1 V p-p Analog Input Range 105 MSPS
Figure 35. SINAD and SFDR vs. Encode Pulse Width High, AIN = –0.5 dBFS
Single-Ended, 1 V p-p Analog Input Range 65 MSPS
80
100
120
140
160
180
200
(m
A
)
02
00
1-
0
33
0
20
40
60
80
100
120
140
ENCODE CLOCK RATE (MSPS)
IVD – 105
IVD – 65
–65/–105 IVDD
0
5
10
15
20
25
30
35
40
45
50
IV
DD
(m
A
)
2.0
2.5
3.0
3.5
4.0
4.5
(%
)
020
–40
–20
40
60
80
TEMPERATURE (°C)
02
00
1-
0
3
6
GAIN –105
GAIN –65
Figure 36. Gain Error vs. Temperature, A
Figure 33. IVD and IVDD vs. Encode Rate (AIN = 10.3 MHz, @ –0.5 dBFS),
–65 MSPS/–105 MSPS Grade CI = 5 pF
IN
= 10.3 MHz, –65 MSPS Grade,
–105 MSPS Grade, 1 V p-p
52
54
56
58
60
62
(dB
)
64
66
68
020
–40
–20
40
60
80
TEMPERATURE (°C)
02
00
1-
0
3
7
SFDR –65
SFDR –105
SNR –65
SNR –105
SINAD –65
SINAD –105
1.119
1.121
1.123
1.125
1.127
1.129
1.131
(V)
020
–40
–20
40
60
80
TEMPERATURE (°C)
02
00
1-
0
3
4
Figure 37. SNR, SINAD, SFDR vs. Temperature, A
Figure 34. VREF Output Voltage vs. Temperature (ILOAD = 300 μA)
IN
= 10.3 MHz,
–65 MSPS Grade, –105 MSPS Grade, 1 V p-p