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參數資料
型號: AD9866
廠商: Analog Devices, Inc.
英文描述: Broadband Modem Mixed Signal Front End
中文描述: 寬帶調制解調器混合信號前端
文件頁數: 14/48頁
文件大小: 1647K
代理商: AD9866
AD9866
Rx Path Typical Performance Characteristics:
AVDD = CLKVDD = DVDD = DRVDD = 3.3 V, f
OSCIN
= f
ADC
= 80 MSPS, low-pass filter’s f
3 dB
= 30 MHz, AIN = 1 dBFS,
RIN = 50 , half- or full-duplex interface, default power bias settings
Rev. 0 | Page 14 of 48
0
INPUT FREQUENCY (MHz)
S
T
0
5
10
15
20
35
30
65.0
60.5
61.0
61.5
62.0
62.5
63.0
63.5
64.0
64.5
60.0
–52
–54
–56
–58
–60
–62
–64
–66
–68
–70
–72
SNR @ 3.14V
SNR @ 3.3V
SNR @ 3.47V
THD @ 3.14V
THD @ 3.3V
THD @ 3.47V
Figure 15. SNR and THD vs. Input Frequency and Supply
( LPF f
3 dB
= 26 MHz; RxPGA = 0 dB)
0
RxPGA GAIN (dB)
I
μ
V
N
18
24
30
36
42
48
–40
°
C
+85
°
C
+25
°
C
109.4
10.9
21.9
32.8
43.8
54.7
56.6
76.6
87.5
98.5
0
20
18
16
14
12
10
8
6
4
2
0
Figure 16. Input Referred Integrated Noise and Noise Spectral Density
vs. RxPGA Gain (LPF f
3 dB
= 26 MHz)
0
GAIN (dB)
D
–6
0
6
12
18
24
30
36
42
48
5
–5
–4
–3
–2
–1
0
1
2
3
4
DEVICE 1
DEVICE 2
DEVICE 3
DEVICE 4
Figure 17. Rx DC Offset vs. RxPGA Gain
0
INPUT FREQUENCY (MHz)
S
T
20
30
40
50
60
70
80
63
53
–20
–70
–65
–60
–55
–50
–45
–40
–35
–30
–25
54
55
56
57
58
59
60
61
62
SNR vs. MSPS @ 3.0V
SUP
SNR vs. MSPS @ 346V
SUP
SNR @ 3.13V
THD @ 3.13V
THD @ 3.46V
THD @ 3.3V
Figure 18. SNR and THD vs. Sample Rate and Supply
(LPF Disabled; RxPGA = 0 dB;
f
IN
= 8 MHz)
0
CUTOFF FREQUENCY (MHz)
S
0
10
20
30
40
50
60
70
80
45
38
39
40
41
42
43
44
Figure 19. SNR vs. Filter Cutoff Frequency
(50 MSPS; f
IN
= 5 MHz; AIN =
1 dB; RxPGA = 48 dB)
0
RxPGA GAIN (dB)
G
–6
0
6
12
18
24
30
36
42
48
0.5
–0.5
–0.4
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
0.4
AD9865: GAIN STEP ERROR @ +25
°
C
AD9865: GAIN STEP ERROR @ +85
°
C
AD9865: GAIN STEP ERROR @ –40
°
C
Figure 20. RxPGA Gain Step Error vs. Gain (f
IN
= 10 MHz)
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