AD9865
TYPICAL PERFORMANCE CHARACTERISTICS
Rx PATH TYPICAL PERFORMANCE CHARACTERISTICS
AVDD = CLKVDD = DVDD = DRVDD = 3.3 V, fOSCIN = fADC = 50 MSPS, low-pass filter’s f−3 dB = 22 MHz, AIN = −1 dBFS,
RIN = 50 Ω, half- or full-duplex interface, default power bias settings.
62
59
56
53
50
47
44
41
10.0
9.5
9.0
8.5
8.0
7.5
7.0
6.5
10
0
1MHz
5MHz
10MHz
15MHz
20MHz
FUND = –1dBFS
SINAD = 59.1dBFS
ENOB = 9.53 BITS
SNR = 60.2dBFS
THD = –65.2dBFS
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
SFDR = –64.9dBc (THIRD HARMONIC)
RBW = 12.21kHz
–6
0
6
12
18
24
30
36
42
48
0
6.25
12.50
18.75
25.00
RxPGA GAIN (dB)
FREQUENCY (MHz)
Figure 3. Spectral Plot with 4 k FFT of Input Sinusoid with
RxPGA = 0 dB and PIN = 9 dBm
Figure 6. SINAD/ENOB vs. RxPGA Gain and Frequency
–55
–60
–65
–70
–75
–80
–85
–30
RBW = 12.2kHz
1MHz
5MHz
10MHz
15MHz
20MHz
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–6
0
6
12
18
24
30
36
42
48
0
5
10
15
20
25
FREQUENCY (MHz)
RxPGA GAIN (dB)
Figure 4. Spectral Plot with 4 k FFT of 84-Carrier DMT Signal
with PAR = 10.2 dB, PIN = −33.7 dBm, and RxPGA = 36 dB
Figure 7. THD vs. RxPGA Gain and Frequency
62
–45
66
63
60
57
54
51
48
45
–50
–56
–62
–68
–74
–80
–86
–92
SINAD @ +25°C
SINAD @ +85°C
59
56
53
50
47
44
41
SINAD @ –40°C –50
–55
–60
–65
–70
–75
–80
THD @ +25°C
THD @ +85°C
THD @ –40°C
SINAD @ 3.14V
SINAD @ 3.3V
SINAD @ 3.46V
THD @ 3.14V
THD @ 3.3V
THD @ 3.46V
–21
–18
–15
–12
–9
–6
–3
0
–6
0
6
12
18
24
30
36
42
48
INPUT AMPLITUDE (dBFS)
0dBFS = 2V p-p
RxPGA GAIN (dB)
Figure 5. SINAD and THD vs. Input Amplitude and Supply
(fIN = 8 MHz, LPF f−3 dB = 26 MHz; Rx PGA = 0 dB)
Figure 8. SINAD/THD Performance vs. RxPGA Gain
and Temperature ( fIN = 5 MHz)
Rev. A | Page 12 of 48
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