AD9865
Rx PATH TYPICAL PERFORMANCE CHARACTERISTICS
AVDD = CLKVDD = DVDD = DRVDD = 3.3 V, fOSCIN = fADC = 80 MSPS, low-pass filter’s f−3 dB = 30 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
10
0
5MHz
FUND = –1dBFS
SINAD = 59.3dBFS
ENOB = 9.56 BITS
SNR = 59.8dBFS
THD = –69.1dBFS
10MHz
15MHz
20MHz
30MHz
9.5
9.0
8.5
8.0
7.5
7.0
6.5
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
SFDR = –70.3dBc (THIRD HARMONIC)
RBW = 19.53kHz
–6
0
6
12
18
24
30
36
42
48
0
10
20
30
40
FREQUENCY (MHz)
RxPGA GAIN (dB)
Figure 9. Spectral Plot with 4k FFT of Input Sinusoid
with RxPGA = 0 dB and PIN = 9 dBm
Figure 12. SINAD/ENOB vs. RxPGA Gain and Frequency
–55
–60
–65
–70
–75
–80
–85
–30
–40
RBW = 19.53kHz
–50
–60
–70
–80
–90
–100
–110
–120
–130
5MHz
10MHz
15MHz
20MHz
30MHz
–6
0
6
12
18
24
30
36
42
48
0
10
20
30
40
RxPGA GAIN (dB)
FREQUENCY (MHz)
Figure 10. Spectral Plot with 4k FFT of 111-Carrier DMT Signal with
PAR = 11 dB, PIN = −33.7 dBm, LPF f−3 dB = 32 MHz, and RxPGA = 36 dB
Figure 13. THD vs. RxPGA Gain and Frequency
62
–40
66
63
60
57
54
51
48
45
–50
–56
–62
–68
–74
–80
–86
–92
SINAD @ +25°C
SINAD @ +85°C
SINAD @ 3.14V
SINAD @ 3.3V
SINAD @ 3.46V
THD @ 3.14V
THD @ 3.3V
THD @ 3.46V
59
56
53
50
47
44
41
SINAD @ –40°C –45
–50
–55
–60
–65
–70
–75
THD @ +25°C
THD @ +85°C
THD @ –40°C
–6
0
6
12
18
24
30
36
42
48
–21
–18
–15
–12
–9
–6
–3
0
RxPGA GAIN (dB)
INPUT AMPLITUDE (dBFS)
0dBFS = 2V p-p
Figure 14. SINAD/THD Performance vs. RxPGA Gain and Temperature
( fIN = 10 MHz)
Figure 11. SINAD and THD vs. Input Amplitude and Supply
(fIN = 8 MHz, LPF f−3 dB = 26 MHz; RxPGA = 0 dB)
Rev. A | Page 13 of 48