AD9865 Analog Devices, AD9865 Datasheet - Page 15

• 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.
Figure 21. RxPGA Settling Time −12 dB to +48 dB Transition for DC Input
512
448
384
320
256
192
128
140
130
120
110
100
–12
–15
–18
Figure 22. Rx Low-Pass Filter Amplitude Response vs. Supply
64
90
80
70
60
–3
–6
–9
Figure 23. Rx to Tx Full-Duplex Isolation @ 0 RxPGA Setting
(Note: ATTEN
0
0
0
0
(f
ADC
80
5
5
= 50 MSPS, f
10
160
@ RxPGA = x dB
(f
ADC
10
= 50 MSPS, LPF Disabled)
15
INPUT FREQUENCY (MHz)
240
FREQUENCY (MHz)
TxDAC ISOLATION @ 0dB
−3 dB
= ATTEN
20
15
320
TIME (ns)
= 33 MHz, RxPGA = 0 dB)
25
IAMP ISOLATION @ 0dB
400
@ RxPGA = 0 dB
20
30
480
35
25
− RxPGA Gain)
560
40
30
OSCIN
640
45
3.3V
3.0V
3.6V
= f
720
35
50
ADC
Rev. A | Page 15 of 48
= 50 MSPS, low-pass filter disabled, RxPGA = 0 dB, AIN = −1 dBFS,
Figure 24. RxPGA Settling Time for 0 dB to +5 dB Transition for DC Input
Figure 25. Rx Low-Pass Filter Amplitude Response vs. RxPGA Gain
420
410
400
390
380
370
360
350
340
330
320
352
320
288
256
224
192
160
128
–10
–12
–14
–16
–18
–20
96
64
–2
–4
–6
–8
5
0
0
0
15
Figure 26. Rx Input Impedance vs. Frequency
80
5
25
10
160
(f
ADC
35
(LPF's f
15
= 50 MSPS, LPF Disabled)
INPUT FREQUENCY (MHz)
R
C
240
FREQUENCY (MHz)
IN
IN
45
20
− 3 dB
320
TIME (ns)
+18dB GAIN
+30dB GAIN
+42dB GAIN
55
= 33 MHz)
25
400
65
30
480
75
35
560
85
40
–6dB GAIN
0dB GAIN
+6dB GAIN
95
640
45
AD9865
105
720
50
10
9
8
7
6
5
4
3
2
1
0