1

1

0.5 dB LSB GaAs MMIC 6-BIT DIGITAL

POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz

Functional Diagram

Electrical Specifications,

T

Typical Applications

The HMC425

ALP3 / HMC425ALP3E 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 HMC425

ALP3 & HMC425ALP3E are broad-

band 6-bit GaAs IC digital attenuators in low cost

leadless surface mount packages. Covering 2.2 to

8. 0 G H z , 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

v00.1115

Features

General Description

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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.

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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