Texas Instruments LMH9226RRL-EVM, User Manual, Page: 2 / 16

(J3)
LMH9226
+3.3-V Single Bench
Power Supply
+3.3 V
GND
(J2)
LMH9226RRL-EVM
(J1)
(J5)
DMM
(Measure Current)
1
2
3
Jumper
1.8 V
(J4)
RF Signal Generator
Spectrum Analyzer
Marki BAL-0010
or similar
0°
180°
2:1, Zo = 50 Ÿ
Zo(diff) = 100 Ÿ
3-dB pad
3-dB pad
3-dB pad
3-dB pad
F
L
F
H
GHz
Frequency Support:
F
L
± F
H
= 2.2 ± 3.0 GHz
Zo(se) = 50 Ÿ
Zo(diff) = 50 Ÿ
Description
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2 SBOU237 – December 2019
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Copyright © 2019, Texas Instruments Incorporated
LMH9226 Evaluation Module
1 Description
The LMH9226 evaluation module (EVM) is used to evaluate the LMH9226 device, which is a single-ended
input to differential output RF gain block amplifier available in a 2 × 2-mm
2
, 12-pin RRL package. The
device is well-suited to support requirements for the next generation 5G m-MIMO Active antenna system
while interfacing with the input of transceiver. The EVM is designed to quickly demonstrate the
functionality and performance of the LMH9226 device in the 2.2-GHz to 3-GHz receive frequency band
with 400 MHz of 1-dB bandwidth.
By default, the board is set up for 50- Ω single-ended input matching and 100- Ω differential output
matching for easy interface with 50-
Ω
test equipment. The EVM is ready to connect to a +3.3-V power
supply, signal source, and test instruments through the use of onboard connectors.
1.1 Features
• Operates on 3.3-V supply
• Designed for single-ended 50- Ω input matching and 100- Ω differential output matching interface
• Simple interface to the inputs and output through onboard SMA connectors
• Power down option available onboard using jumper connector
Figure 1. Single Tone Setup for Gain and Output P1dB
1.2 General Usage Information
This section provides general usage information for the LMH9226 EVM. See Figure 1 for a general single
tone setup diagram as a reference point to the following instructions. Some components such as supply
bypass capacitors, and power down reference voltage generation are omitted in
Figure 1 for clarity.
1. Recommended power up sequence:
a. Before connecting the power-supply cables to the EVM, set the DC output power supply to +3.3 V
b. Set the current limit of the DC output power supply at 150 mA
c. Making sure the supply is turned off, connect the power supply cables to the J1 connector of the
EVM
d. Now turn on the DC power supply of VCC = +3.3 V. The supply current (I
Q
) drawn from the power
supply should be approximately 80 mA.
e. If the supply current is low, ensure the device is not disabled by shorting the jumper connection for
J5 between 2 and 3 header pins
2. Power-down option: