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RF2483

LOW NOISE DUAL-BAND QUADRATURE MODULATOR WITH AGC

RF Micro Devices 

RF2483

Typical Performance: 1700MHz to 2200MHz Application Circuit

High Band Modulator Performance versus Frequency

LO=0dBm, VCC=2.7V, GC=2V, IQ=100kHz 800mVP-P

0.0

-10.0

-20.0

Carrier Suppression

Sideband Suppression

3rd Harmonic of Modulation

Output Power

0.0

-10.0

-20.0

-30.0

-30.0

-40.0

-40.0

-50.0

-50.0

-60.0

1700.0

1800.0

1900.0

2000.0

Frequency (MHz)

2100.0

-60.0

2200.0

High Band Modulator Performance versus LO Power

LO=1900MHz, VCC=2.7V, GC=2V, IQ=100kHz 800mVP-P

0.0

0.0

-10.0

-20.0

Carrier Suppression

Sideband Suppression

3rd Harmonic of Modulation

Output Power

-10.0

-20.0

-30.0

-30.0

-40.0

-40.0

-50.0

-50.0

-60.0

-60.0

-10.0

-8.0

-6.0

-4.0

-2.0

0.0

2.0

4.0

6.0

8.0

LO Power (dBm)

High Band Output Noise 20MHz Offset versus LO Power

-152.0

VCC=2.7V, LO=1900MHz, GC=2V

1.0

-153.0

-154.0

-155.0

Output Noise 20MHz Offset,

0.0

I&Q = 800mVpp 1.2Vdc

Output Noise 20MHz Offset,

I&Q = 0 mVpp 1.2Vdc

-1.0

Output Power

I&Q = 800mVpp 1.2Vdc

-2.0

-156.0

-3.0

-157.0

-4.0

-158.0

-5.0

-10.0

-8.0

-6.0

-4.0

-2.0

0.0

2.0

4.0

6.0

8.0

LO Power (dBm)

-130.0

-135.0

-140.0

-145.0

High Band Output Noise 20MHz Offset versus Gain Control

VCC=2.7V, LO=1900MHz, GC=2V

5.0

Output Noise 20MHz Offset,

I&Q = 800mVpp 1.2Vdc

0.0

Output Noise 20MHz Offset,

I&Q = 0mVpp 1.2Vdc

Output Power

-5.0

I&Q=800mVpp 1.2Vdc

-10.0

-150.0

-15.0

-155.0

-20.0

-160.0

-25.0

-165.0

-30.0

-170.0

-35.0

0.0

0.5

1.0

1.5

2.0

2.5

Gain Control (V)

High Band Output Power versus Baseband Signal Level

VCC=2.7V, LO=1900MHz 0dBm, IQ=100kHz 1.2VDC

20.0

10.0

0.0

-10.0

-20.0

-30.0

-40.0

-50.0

-60.0

-70.0

-80.0

10.0

100.0

1000.0

Baseband Signal Level (mVpp)

GC = 2.0V

GC = 1.5V

GC = 1.0V

GC = 0.5V

10000.0

High Band Output IP3 versus Gain Control

VCC=2.7V, LO=0dBm, IQ=900kHz and 1100kHz at 1.2VDC

30.00

20.00

10.00

0.00

-10.00

-20.00

-30.00

0.0

0.5

1.0

1.5

Gain Control (V)

1700MHz

1800MHz

1900MHz

2000MHz

2.0

2.5

DS110505

7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical

support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.

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