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NJM2278

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Japan Radio Corporation  

NJM2278

300/400MHz Band 20mW Power Amplifier

! GENERAL DESCRIPTION

The NJM2278 is a narrow band, small signal amplifier, especially

designed for use as the final RF amplifier in 300MHz / 400MHz

! PACKAGE OUTLINE

band transmitter. The amplifier produces an output power of up to

20mW at the desired frequency, which frequency and power are

adjusted by external input and output matching circuits. It also

features excellent thermal stability of power gain.

NJM2278F1

! APPLICATIONS

300/400MHz Band Applications, 400MHz Industrial Radios, Digital Communication Systems

! FEATURES (@400MHz, 2.7V)

# Low Operating Voltage

2V to 5.5V

# Low Operating Current

20 mA @ 0dBm input

# Power Gain

17dB @ - 30dBm input

13dB @0dBm input

# Saturation Output

14dBm @3dBm input

# Variable Power Gain Control 4dB

# Excellent Power Gain Thermal Stability

Gain Flatness ±1dB (- 40°C to + 85°C)

# RF IN Input Impedance

70 Ω

# RF OUT Output Impedance 110 Ω

# Recommended Operating Frequency 300MHz to 500MHz

# Bipolar Technology

# Package Outline

SOT23-6 (MTP6) 2.8mm x 2.9mm

Note: For the signals at frequencies other than recommended operating frequency range of 300 to 500MHz,

please refer to the “TYPICAL CHARACTERISTICS”.

! PIN CONFIGULATION

1

2

3

Orientation Mark

6

5

4

Top View

Pin Function

1. RF IN

2. GND

3. EMI

4. RF OUT

5. V+

6. IREF

! Function Block Diagram

RF IN

1

GND

2

EMI

3

Regulator

Bias

IREF

6

V+

5

RF OUT

4

Ver.2008-08-22

-1-

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