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20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

5

5 - 110

0.5dB LSB GaAs MMIC 6-BIT DIGITAL

ATTENUATOR, DC - 13 GHz

v08.0809

Functional Diagram

The HMC424LP3 / HMC424LP3E is ideal for:

• Basestation Infrastructure

• Fiber Optics & Broadband Telecom

• Microwave & VSAT Radios

• Military & Space

• Test Instrumentation

0.5 dB LSB Steps to 31.5 dB

Single Control Line Per Bit

± 0.5 dB Typical Bit Error

The HMC424LP3 & HMC424LP3E are broadband

6-bit GaAs IC digital attenuators in low cost leadless

surface mount packages. Covering DC to 13 GHz, the

insertion loss is less then 4 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

+32 dBm. Six control voltage inputs, toggled between

0 and -5V, are used to select each attenuation state.

A single Vee bias of -5V allows operation at frequ-

encies down to DC.

Parameter

Frequency (GHz)

Min.

Typ.

Max.

Units

Insertion Loss

DC - 4 GHz

4.0 - 8.0 GHz

8.0 - 13.0 GHz

3.1

3.5

4.0

3.8

4.0

4.6

dB

dB

dB

Attenuation Range

DC - 13.0 GHz

31.5

dB

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

DC - 13.0 GHz

9

12

dB

Attenuation Accuracy: (Referenced to Insertion Loss)

0.5 - 15.5 dB States

16 - 31.5 dB States

DC - 13.0 GHz

DC - 13.0 GHz

± 0.3 + 3% of Atten. Setting Max

± 0.3 + 5% of Atten. Setting Max

dB

dB

Input Power for 0.1 dB Compression

1.0 - 13.0 Ghz

22

dBm

Input Third Order Intercept Point

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

REF State

All Other States

1.0 - 13.0 Ghz

46

32

dBm

dBm

Switching Characteristics

tRISE, tFALL (10/90% RF)

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

DC - 13.0 GHz

30

50

ns

ns

Typical Applications

Features

General Description