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20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

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GaAs MMIC LOW NOISE AMPLIFIER

w/ BYPASS MODE, 3.4 - 3.8 GHz

v03.1206

General Description

Features

Functional Diagram

The HMC491LP3 & HMC491LP3E are versatile, inte-

grated, Low Noise Amplifiers (LNA) featuring a bypass

mode intended for 3.4 to 3.8 GHz Fixed Wireless &

WLL applications. The amplifier provides 16 dB of

gain, 2 dB noise figure and +3 dBm input IP3 while

requiring only 9 mA from a +3V supply. Using a single

control line, the LNA can be switched into a low loss

2.2 dB bypass mode reducing the current consump-

tion to 20 μA. A low cost, leadless 3x3 mm QFN sur-

face mount package (LP3) houses the amplifier. No

external RF matching components are required.

Gain: 16 dB

Noise Figure: 2 dB

Single Supply: +3V @ 9 mA

Integrated Bypass Mode

50 Ohm Matched Input/Output

3 x 3 x 1 mm QFN SMT Package

Typical Applications

The HMC491LP3 / HMC491LP3E is ideal for:

• Wireless Local Loop (WLL)

• Fixed Wireless Access

• Microwave & VSAT Radios

Parameter

LNA Mode

LNA Mode

Bypass Mode

Units

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max.

Frequency Range

3.4 - 3.6

3.6 - 3.8

3.4 - 3.8

GHz

Gain

14.5

17

13

15.5

-2.8

-2.3

dB

Gain Variation Over Temperature

0.012

0.02

0.012

0.02

0.004

0.008

dB / °C

Noise Figure

2.2

2.7

2.0

2.5

--

--

dB

Input Return Loss

12

17

18

dB

Output Return Loss

9

7

11

dB

Reverse Isolation

34

33

--

dB

Input or Output Power for 1dB Compression (P1dB)*

3

6

4

7

25

28

dBm

Input Third Order Intercept (IP3)

(-20 dBm Input Power per tone, 1 MHz tone spacing)

13

11

dBm

Supply Current (Idd)

9

9

0.03

mA

* P1dB for LNA Mode is referenced to RFOUT while P1dB for Bypass Mode is referenced to RFIN.