Analog Devices AD9865 Manual page 13

Rx PATH TYPICAL PERFORMANCE CHARACTERISTICS
AVDD = CLKVDD = DVDD = DRVDD = 3.3 V, f
RIN = 50 Ω, half- or full-duplex interface, default power bias settings.
10
FUND = –1dBFS
0 SINAD = 59.3dBFS
ENOB = 9.56 BITS
–10
SNR = 59.8dBFS
THD = –69.1dBFS
–20
SFDR = –70.3dBc (THIRD HARMONIC)
RBW = 19.53kHz
–30
–40
–50
–60
–70
–80
–90
–100
0 10
FREQUENCY (MHz)
Figure 9. Spectral Plot with 4k FFT of Input Sinusoid
with RxPGA = 0 dB and P
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0 10
FREQUENCY (MHz)
Figure 10. Spectral Plot with 4k FFT of 111-Carrier DMT Signal with
PAR = 11 dB, P = −33.7 dBm, LPF f
IN
66
SINAD @ 3.14V
SINAD @ 3.3V
63
SINAD @ 3.46V
60
57
54
51
48
45
–21 –18 –15 –12
INPUT AMPLITUDE (dBFS)
0dBFS = 2V p-p
Figure 11. SINAD and THD vs. Input Amplitude and Supply
(f = 8 MHz, LPF f = 26 MHz; RxPGA = 0 dB)
IN −3 dB
= f = 80 MSPS, low-pass filter's f
OSCIN ADC
20 30 4 0
= 9 dBm
IN
RBW = 19.53kHz
20 30 4 0
= 32 MHz, and RxPGA = 36 dB
−3 dB
–50
THD @ 3.14V
THD @ 3.3V
–56
THD @ 3.46V
–62
–68
–74
–80
–86
–92
–9 –6 –3 0
Rev. A | Page 13 of 48
= 30 MHz, AIN = −1 dBFS,
−3 dB
62
59
56
53
50
47
44
41
–6 0 6 12 18 24
RxPGA GAIN (dB)
Figure 12. SINAD/ENOB vs. RxPGA Gain and Frequency
–55
–60
–65
–70
–75
–80
–85
–6 0 6 12 18
RxPGA GAIN (dB)
Figure 13. THD vs. RxPGA Gain and Frequency
62
59
56
THD @ +25°C
THD @ +85°C
53
THD @ –40°C
50
47
44
41
–6 0 6 12 18 24
RxPGA GAIN (dB)
Figure 14. SINAD/THD Performance vs. RxPGA Gain and Temperature
( f = 10 MHz)
IN
AD9865
10.0
5MHz
10MHz
15MHz 9.5
20MHz
30MHz
9.0
8.5
8.0
7.5
7.0
6.5
30 36 42 48
5MHz
10MHz
15MHz
20MHz
30MHz
24 30 36 42 48
–40
SINAD @ +25°C
SINAD @ +85°C
SINAD @ –40°C –45
–50
–55
–60
–65
–70
–75
30 36 42 48