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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.
2048
1792
1536
1280
1024
768
512
256
0
80
160
240
Figure 21. RxPGA Settling Time −12 dB to +48 dB Transition for DC Input
(f
= 50 MSPS, LPF Disabled)
ADC
0
–3
–6
–9
–12
–15
–18
0
5
10
15
INPUT FREQUENCY (MHz)
Figure 22. Rx Low-Pass Filter Amplitude Response vs. Supply
(f
= 50 MSPS, f
ADC
−3 dB
140
130
TxDAC ISOLATION @ 0dB
120
110
100
90
80
70
60
0
5
10
FREQUENCY (MHz)
Figure 23. Rx to Tx Full-Duplex Isolation @ 0 RxPGA Setting
(Note: ATTEN
= ATTEN
@ RxPGA = x dB
= f
OSCIN
320
400
480
560
640
720
TIME (ns)
3.3V
3.0V
3.6V
20
25
30
35
40
45
= 33 MHz, RxPGA = 0 dB)
IAMP ISOLATION @ 0dB
15
20
25
30
35
− RxPGA Gain)
@ RxPGA = 0 dB
= 50 MSPS, low-pass filter disabled, RxPGA = 0 dB, AIN = −1 dBFS,
ADC
1408
1280
1152
1024
896
768
640
512
384
256
0
Figure 24. RxPGA Settling Time for 0 dB to +5 dB Transition for DC Input
0
–2
–4
–6
–8
–10
–12
–14
–16
–18
–20
50
0
Figure 25. Rx Low-Pass Filter Amplitude Response vs. RxPGA Gain
420
410
400
390
380
370
360
350
340
330
320
5
Rev. A | Page 15 of 48
80
160
240
320
400
480
TIME (ns)
(f
= 50 MSPS, LPF Disabled)
ADC
+18dB GAIN
+30dB GAIN
+42dB GAIN
5
10
15
20
25
30
INPUT FREQUENCY (MHz)
(LPF's f
= 33 MHz)
− 3 dB
R
IN
C
IN
15
25
35
45
55
65
FREQUENCY (MHz)
Figure 26. Rx Input Impedance vs. Frequency
AD9866
560
640
720
–6dB GAIN
0dB GAIN
+6dB GAIN
35
40
45
50
10
9
8
7
6
5
4
3
2
1
0
75
85
95
105
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