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5 - 138

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1 dB LSB GaAs MMIC 3-BIT DIGITAL

POSITIVE CONTROL ATTENUATOR, DC - 6 GHz

v03.1107

Functional Diagram

The HMC468LP3 / HMC468LP3E is ideal for:

• Cellular; UMTS/3G Infrastructure

• Fixed Wireless & WLL

• Microwave Radio & VSAT

• Test Equipment

1 dB LSB Steps to 7 dB

High IP3: +50 dBm

± 0.25 dB Typical Bit Error

Single Control Line Per Bit

Single +5V Supply

Included in the HMC-DK004 Designer’s Kit

The HMC468LP3 & HMC468LP3E are broadband

3-bit GaAs IC digital attenuators in low cost leadless

surface mount packages. Covering DC to 6.0 GHz,

the insertion loss is less than 1 dB typical up to 4

GHz. The attenuator bit values are 1 (LSB), 2 and 4

dB for a total attenuation of 7 dB. Attenuation accu-

racy is excellent at ±0.4 dB typical step error with an

IIP3 of +50 dBm. Three control voltage inputs, toggled

between 0 and +5V, are used to select each attenua-

tion state. A single Vdd bias of +5V is required.

Parameter

Frequency (GHz)

Min.

Typ.

Max.

Units

Insertion Loss

DC - 2.5 GHz

2.5 - 4.5 GHz

4.5 - 6.0 GHz

0.7

0.9

1.3

1.0

1.3

1.8

dB

dB

dB

Attenuation Range

DC - 6 GHz

7

dB

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

DC - 4 GHz

4.0 - 6.0 GHz

20

15

dB

dB

Attenuation Accuracy:

(Referenced to Insertion Loss)

All States

1 - 4 dB States

5 - 7 dB States

DC - 2.5 GHz

2.5 - 6.0 GHz

2.5 - 6.0 GHz

± 0.2 + 2% of Atten. Setting Max.

± 0.3 + 3% of Atten. Setting Max.

± 0.4 + 4% of Atten. Setting Max.

dB

dB

dB

Input Power for 0.1 dB Compression

0.25 - 6.0 GHz

20

dBm

Input Third Order Intercept Point

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

0.25 - 6.0 GHz

50

dBm

Switching Characteristics

tRISE, tFALL (10/90% RF)

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

DC - 6 GHz

110

135

ns

ns

* Bypass capacitor connecting ACG1, ACG2 & ACG3 to RF ground required per pin description herein.

Typical Applications

Features

General Description