AD9865 Analog Devices, AD9865 Datasheet - Page 13

• Manufacturer Part Number: AD9865
• Description: 10-Bit Broadband Modem Mixed Signal Front End (MxFE®)
• Manufacturer: Analog Devices

Specifications of AD9865

• Resolution (bits): 10bit
• # Chan: 1
• Sample Rate: 80MSPS
• Interface: Par
• Analog Input Type: Diff-Uni
• Ain Range: 6.3 V p-p,8 mV p-p
• Adc Architecture: Pipelined
• Pkg Type: CSP

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