AD9865CHIPS AD [Analog Devices], AD9865CHIPS Datasheet - Page 14

• Manufacturer Part Number: AD9865CHIPS
• Description: Broadband Modem Mixed-Signal Front End
• Manufacturer: AD [Analog Devices]

AD9865
Figure 16. Input Referred Integrated Noise and Noise Spectral Density vs.
109.4
98.5
87.5
76.6
65.6
54.7
43.8
32.8
21.9
10.9
61.0
60.5
60.0
59.5
59.0
58.5
58.0
57.5
57.0
56.5
56.0
0
–6
–6
–1
–2
–3
–4
–5
5
4
3
2
1
0
Figure 15. SNR and THD vs. Input Frequency and Supply
–6
0
0
0
Figure 17. Rx DC Offset vs. RxPGA Gain
THD @ 3.13V
THD @ 3.3V
THD @ 3.47V
( LPF f
6
6
RxPGA Gain (LPF f
6
INPUT FREQUENCY (MHz)
−3 dB
12
12
RxPGA GAIN (dB)
12
= 26 MHz; RxPGA = 0 dB)
18
18
GAIN (dB)
18
24
−3 dB
24
24
= 26 MHz)
DEVICE 1
DEVICE 2
DEVICE 3
DEVICE 4
30
30
30
AD9865: +25°C
AD9865: +85°C
AD9865: –40°C
36
36
SNR @ 3.13V
SNR @ 3.3V
SNR @ 3.47V
36
42
42
42
48
48
20
18
16
14
12
10
8
6
4
2
0
–52
–54
–56
–58
–60
–62
–64
–66
–68
–70
–72
48
Rev. A | Page 14 of 48
60.0
59.5
59.0
58.5
58.0
57.5
57.0
56.5
56.0
55.5
55.0
–0.1
–0.2
–0.3
–0.4
–0.5
20
0.5
0.4
0.3
0.2
0.1
45
44
43
42
41
40
39
38
0
–6
Figure 20. RxPGA Gain Step Error vs. Gain (f
0
Figure 18. SNR and THD vs. Sample Rate and Supply
(50 MSPS; f
0
30
(LPF Disabled; RxPGA = 0 dB; f
10
Figure 19. SNR vs. Filter Cutoff Frequency
SNR @ 3.13V
SNR @ 3.3V
SNR @ 3.46V
6
IN
20
INPUT FREQUENCY (MHz)
= 5 MHz; AIN = −1 dB; RxPGA = 48 dB)
CUTOFF FREQUENCY (MHz)
40
12
30
RxPGA GAIN (dB)
AD9865: GAIN STEP ERROR @ +25 ° C
AD9865: GAIN STEP ERROR @ +85 ° C
AD9865: GAIN STEP ERROR @ –40 ° C
18
50
40
24
50
60
IN
30
= 8 MHz)
THD @ 3.13V
THD @ 3.3V
THD @ 3.46V
60
IN
36
= 10 MHz)
70
70
42
80
–20
–30
–40
–50
–60
–70
80
48