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5

5 - 116

0.5 dB LSB GaAs MMIC 6-BIT DIGITAL

POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz

Functional Diagram

Electrical Specifications,

T

The HMC425LP3 / HMC425LP3E is ideal for:

• WLAN & Point-to-Multi-Point

• Fiber Optics & Broadband Telecom

• Microwave Radio & VSAT

• Military

0.5 dB LSB Steps to 31.5 dB

Single Control Line Per Bit

± 0.5 dB Typical Bit Error

Single +5V Supply

3x3 mm SMT Package

The HMC425LP3 & HMC425LP3E are broadband

6-bit GaAs IC digital attenuators in low cost leadless

surface mount packages. Covering 2.2 to 8.0 GHz,

the insertion loss is less then 3.8 dB typical. The

attenuator bit values are 0.5 (LSB), 1, 2, 4, 8, and

16 dB for a total attenuation of 31.5 dB. Attenuation

accuracy is excellent at ± 0.5 dB typical step error

with an IIP3 of +40 dBm. Six control voltage inputs,

toggled between 0 and +3 to +5V, are used to select

each attenuation state. A single Vdd bias of +3 to +5V

is required.

Parameter

Frequency

(GHz)

Min.

Typ.

Max.

Units

Insertion Loss

2.2 - 6.0 GHz

6.0 - 8.0 GHz

3.5

3.8

3.8

4.3

dB

dB

Attenuation Range

2.2 - 8.0 GHz

31.5

dB

Return Loss (RF1 & RF2, All Atten. States)

2.2 - 8.0 GHz

15

dB

Attenuation Accuracy:

(Referenced to Insertion Loss)

All States

2.2 - 8.0 GHz

± 0.5 + 5% of Atten. Setting Max.

dB

Input Power for 0.1 dB Compression

Vdd = 5V

Vdd = 3V

2.2 - 8.0 GHz

22

19

dBm

dBm

Input Third Order Intercept Point

(Two-Tone Input Power= 0 dBm Each Tone)

REF - 16.0 dB States

16.5 - 31.5 dB States

2.2 - 8.0 GHz

45

35

dBm

dBm

Switching Characteristics

tRISE, tFALL (10/90% RF)

tON, tOFF (50% CTL to 10/90% RF)

2.2 - 8.0 GHz

160

180

ns

ns

v03.0409

Typical Applications

Features

General Description