MICRF300 datasheet(1/8 Pages) MICREL

Part #	MICRF300

Description	100MHz to 1000MHz, 1.8 to 3.6V, Low-Noise Amplifier with Shutdown

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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MICRF300

100MHz to 1000MHz, 1.8 to 3.6V,

Low-Noise Amplifier with Shutdown

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

General Description

The MICRF300 is a low-noise amplifier (LNA) with low-

power shutdown mode, which operates over the

100MHz to 1000MHz frequency band. The device is

targeted for low-power, low-data rate applications at

315/433MHz, achieving a low 1.2dB noise figure with

18dB of gain, helping to improve receiver noise figure

and sensitivity. The device also performs well at

868/915MHz, achieving 13dB of gain and a noise figure

of 1.7dB. The device requires a simple input matching

network and output matching network to optimize

performance for the desired frequency band.

The MICRF300 operates over the 1.8V to 3.6V voltage

range. Consuming a low 2.5mA of supply current during

operation and a typical 50nA of shutdown current, the

MICRF300 is an ideal solution for battery powered

equipment. The device is available in 6-pin SC70

package and is rated to operate over the -40˚C to

+125˚C temperature range.

Features

• 1.8V to 3.6V supply voltage range

• 2.5mA operating supply current

• 1μA (Max) shutdown current over temperature

• 18.3dB gain at 315MHz/433.92MHz

• 1.15dB noise figure at 315MHz/433.92MHz

• -25dBm input P1dB compression point at 433.92MHz

• -40˚C to +125˚C operating temperature range

• Small 6-pin SC70 package

Applications

• Security systems

• Remote keyless entry (RKE)

• Tire pressure monitoring (TPMS)

• Automated meter reading (AMR)

• Garage door openers (GDO)

• Remote weatherstations

Typical Application Circuit

Typical Performance and Matching Component Values

fRF

(MHz)

ICC

(mA)

Gain

(dB)

NF

(dB)

IP1dB

(dBm)

IIP3

(dBm)

L1

(nH)

C1

(pF)

L2

(nH)

C2

(pF)

315

2.5

18.5

1.15

-26.5

-15

33

1000

47

5.6

433.92

2.5

18.3

1.15

-25

-13

22

1000

33

3.9

900

2.5

13.6

1.7

-21

-10

2.7

270

10

1.8

April 2012

M9999-041712-B

RadioTech@micrel.com or (408) 944-0800

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