LMH6401_16 Datasheet, PDF (35/48 Pages) Texas Instruments – LMH6401 DC to 4.5 GHz, Fully-Differential, Digital Variable-Gain Amplifier

www.ti.com
10.2.3 Application Curves
60
0.3
200 MHz
55
500 MHz
1000 MHz
0.2
50
2000 MHz
45
0.1
40
0
35
30
-0.1
25
-0.2
20
15
-0.3
-2 -1 0 1 2 3 4 5 6 7 8 9 10
Total Output Power per tone (dBm)
D022
Figure 69. Output IP3 vs Total Output Power per Tone
LMH6401
SBOS730A – APRIL 2015 – REVISED MAY 2015
3
Vin
2VppOut
4VppOut ²
1
0
-1
-2
-3
Time (1 nsec/div)
D037
Figure 70. Output Pulse Response
10.3 Do's and Don'ts
10.3.1 Do:
• Include a thermal analysis at the beginning of the project.
• Use well-terminated transmission lines for all signals.
• Maintain symmetrical input and output trace layouts
• Use solid metal layers for the power supplies.
• Keep signal lines as straight as possible.
• Use split supplies where required.
10.3.2 Don't:
• Use a lower supply voltage than necessary.
• Use thin metal traces to supply power.
• Forget about the common-mode response of filters and transmission lines.
• Rout digital line traces close to the analog signals and supply line traces
Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: LMH6401
Submit Documentation Feedback
35