Datasheet

tp2
LMH2180
Eval
Board
V
DD
GND
GND
V
DD
Power
Supply
4395A
Network
Analyzer
Source
4395A
Network
Analyzer
Input
41800A
Active
Probe
J1
JR1
www.ti.com Measurement Procedure
Table 2. Bill of Material
Designator Description Comment
R1, R5 0603 Resistor 0 Ω
R2, R7 0603 Resistor 30 kΩ
R3, R6 0603 Resistor Optional
R4, R8 0603 Resistor 510 kΩ
C1 Case B, Tantalum Capacitor 10 µF 16V
C2, C5, C8 0603 Capacitor 100 nF
C3, C6 0603 Capacitor 10 nF
C4, C7 0603 Capacitor Optional
JR1, JR2 Jumper Header 1x3
J1, J2, J3, J4 Connector SMA
JP1 Power Connector pin 1.5 mm, Black
JP2 Power Connector pin 1.5 mm, Red
U1 WSON-8 LMH2180
5 Measurement Procedure
The performance of the LMH2180 can be measured with the setup given in Figure 3.
Figure 3. Measurement Setup
A supply voltage between 2.5 V to 5.0 V can be set by an external power supply connected to the JP2
(Red) V
DD
pin and JP1 (Black) GND pin. In order to test its functionality, the buffer is tested by looking at
the frequency response. Make sure to enable the buffer that has to be evaluated. The frequency response
is tested by using a network analyzer (4395A). For small signal bandwidth evaluation, the source input
should be set at −16 dBm. Be aware to measure the output of the buffer with the probe directly connected
to TP2 or TP4 to measure the highest available bandwidth.
3
SNAA053B–January 2008–Revised May 2013 AN-1776 LMH2180 Evaluation Board in WSON
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