For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824

Phone: 978-250-3343

Fax: 978-250-3373

Order On-line at www.hittite.com

Application Support: Phone: 978-250-3343 or apps@hittite.com

1

HMC939LP4 / 939LP4E

v01.1211

1.0 dB LSB GaAs MMIC 5-BIT DIGITAL

ATTENUATOR, 0.1 - 33 GHz

the HMC939LP4 / HMC939LP4e is ideal for:

• Fiber Optics & Broadband Telecom

• Microwave Radio & VSAT

• Military Radios, Radar & ECM

• Space Applications

• Sensors

• Test & Measurement Equipment

1.0 dB LSB Steps to 31 dB

Single Positive Control Line Per Bit

±1.0 dB Typical Bit Error

High Input IP3: +43 dBm

the HMC939LP4 & HMC939LP4E are broadband

5-bit GaAs IC digital attenuators in low cost leadless

surface mount packages. Covering 0.1 to 33.0 GHz,

the insertion loss is less than 5 dB typical. The attenu-

ator bit values are 1.0 (LSB), 2, 4, 8, 16 for a total atten-

uation of 31 dB. Attenuation accuracy is excellent

at ±0.4 dB typical step error with an IIP3 of +43 dBm.

Five control voltage inputs, toggled between +5V and

0V, are used to select each attenuation state.

Parameter

Frequency (GHz)

Min.

Typ.

Max.

Units

Insertion Loss

0.1 - 18.0 GHz

18.0 - 26.5 GHz

26.5 - 33.0 GHz

4.0

5.5

6.5

5.5

7.0

8.5

dB

dB

dB

Attenuation Range

0.1 - 33.0 GHz

31

dB

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

0.1 - 33.0 GHz

12

dB

Attenuation Accuracy: (Referenced to Insertion Loss)

1.0 - 15 dB States

16 - 31 dB States

16 - 31 dB States

0.1 - 33.0 GHz

0.1 - 20.0 GHz

20.0 - 33.0 GHz

± (0.5 + 5%) of Atten. Setting Max

± (0.5 + 5%) of Atten. Setting Max

± (0.6 + 8%) of Atten. Setting Max

dB

dB

dB

Input Power for 0.1 dB Compression

0.1 - 0.5 GHz

0.5 - 33.0 GHz

20

25

dBm

dBm

Input Third Order Intercept Point

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

0.1 - 0.5 GHz

0.5 - 33.0 GHz

40

43

dBm

dBm

Switching Characteristics

tRISE, tFALL (10/90% RF)

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

0.1 - 33.0 GHz

60

90

ns

ns

Idd

0.1 - 33.0 GHz

2.5

4.5

6.5

mA

Iss

0.1 - 33.0 GHz

-7.0

-5.0

-3.0

mA

General Description

Features

Functional Diagram

Typical Applications