Typical Performance Characteristics; Rx Path Typical Performance Characteristics - Analog Devices AD9865 Manual

AD9865

TYPICAL PERFORMANCE CHARACTERISTICS

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