AD9865CHIPS AD [Analog Devices], AD9865CHIPS Datasheet - Page 18

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

AD9865
IAMP PATH TYPICAL PERFORMANCE CHARACTERISTICS
AVDD = CLKVDD = DVDD = DRVDD = 3.3 V, f
Figure 65) into 50 Ω load, half- or full-duplex interface, default power bias settings.
Figure 40. Spectral Plot of 84-Carrier OFDM Test Vector Using IAMPN in
Figure 41. Spectral Plot of 84-Carrier OFDM Test Vector Using IAMP in
–10
–15
–20
–25
–30
–35
–40
–45
–50
–55
–60
–10
–20
–30
–40
–50
–60
–70
–80
(PBR951 Transistors, IAMP Settings of I = 6 mA, N = 2, G = 6)
–10
–20
–30
–40
–50
–60
–70
–80
20
15
10
–5
5
0
0
0
(IAMP Settings of I = 10 mA, N = 4, G = 0; VCM = 4.8 V)
0
0
0
Figure 39. Dual-Tone Spectral Plot of IAMPN Output
2:1 Transformer into 75 Ω Loader, VCM = 4.8 V)
Voltage-Mode Configuration with AVDD = 5 V
(IAMP Settings of I = 12.5 mA, N = 4, G = 0,
5
5
5
Current-Mode Configuration
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
10
10
10
15
15
15
PAR = 11.4
RMS = 10.3dBm
PAR = 11.4
RMS = 10.4dBm
RBW = 2.3kHz
20
20
20
OSCIN
= 50 MSPS, R
25
25
25
Rev. A | Page 18 of 48
SET
= 1.58 kΩ, 1:1 transformer coupled output (see Figure 64 and
Figure 44. Spectral Plot of 84-Carrier OFDM Test Vector Using IAMP in
Figure 42. IOUTN Third-Order Intercept vs. Common-Mode Voltage
Figure 43. IOUTG Third-Order Intercept vs. Common-Mode Voltage
–10
–20
–30
–40
–50
–60
–70
–80
(PBR951 Transistors, IAMP Settings of I = 6 mA, N = 2, G = 6)
48
46
44
42
40
38
36
34
32
30
42
40
38
36
34
32
30
0
3.0
3.0
0
Voltage-Mode Configuration with AVDD = 3.3 V
(IAMP Settings of I = 12.5 mA, N = 4, G = 0, 2:1
(IAMP Settings of I = 4.25 mA, N = 0, G = 6,
2:1 Transformer into 75 Ω Load)
5
Transformer into 75 Ω Load)
3.5
3.5
FREQUENCY (MHz)
10
VCM (V)
VCM (V)
4.0
4.0
15MHz
15
4.5
4.5
PAR = 11.4
RMS = 9.8dBm
RBW = 10kHz
20MHz
2.5MHz
5MHz
10MHz
15MHz
20MHz
2.5MHz
20
10MHz
5MHz
5.0
5.0
25