1

HMC939

ALP4 / 939ALP4E

v0

0.1115

1.0 dB LSB GaAs MMIC 5-BIT DIGITAL

ATTENUATOR, 0.1 - 33 GHz

Typical Applications

the HMC939

ALP4 / HMC939ALP4e 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 HMC939

ALP4 & HMC939ALP4E 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

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

For price, delivery, and to place orders: Analog Devices, Inc.,

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106

Phone: 781-329-4700 • Order online at www.analog.com

Application Support: Phone: 1-800-ANALOG-D