MICROWAVE CORPORATION

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9

HMC290

2 dB LSB GaAs MMIC 2-BIT DIGITAL

ATTENUATOR, 0.7 - 4.0 GHz

v00.0600

General Description

Features

Functional Diagram

2 dB LSB Steps to 6 dB

Single Positive Control Per BIT

+/-0.2 dB Typical Bit Error

Electrical Specifications,

T

Typical Applications

The HMC290 is a broadband 2 - bit positive control

GaAs IC digital attenuator in a 6 lead SOT26 sur-

face mount plastic package. Covering 0.7 to 4 GHz,

the insertion loss is typically less than 0.7 dB. The

attenuator bit values are 2 (LSB) and 4 dB for a total

attenuation of 6 dB. Accuracy is excellent at ± 0.2

dB typical with an IIP3 of up to +52 dBm. Two bit

control voltage inputs, toggled between 0 and +3 to

+5 volts, are used to select each attenuation state

at less than 50 uA each. A single Vdd bias of +3 to

+5 volts applied through an external 5K Ohm resis-

tor is required. Occupying less than 9 mm², this is

the smallest 2 - bit digital attenuator available.

The HMC290 is ideal for:

• Cellular

• PCS, ISM, MMDS

• WLL Handset & BaseStation

Parameter

Frequency

Min.

Typical

Max.

Units

Insertion Loss

0.7 - 1.4 GHz

1.4 - 2.3 GHz

2.3 - 2.7 GHz

2.7 - 4.0 GHz

0.5

0.5

0.6

0.8

0.7

0.8

0.9

1.2

dB

dB

dB

dB

Attenuation Range

0.7 - 4.0 GHz

6

dB

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

0.7 - 2.7 GHz

2.7 - 4.0 GHz

16

15

20

18

dB

dB

Attenuation Accuracy: (Referenced to Insertion Loss)

2, 4 dB States

6 dB States

0.7 - 4.0 GHz

0.7 - 4.0 GHz

± 0.2 + 2% of Atten. Setting Max

± 0.3 + 2% of Atten. Setting Max

dB

dB

Input Power for 0.1 dB Compression

5V

3V

0.7 - 4.0 GHz

27

24

dBm

dBm

Input Third Order Intercept Point

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

5V

3V

0.7 - 4.0 GHz

52

50

dBm

dBm

Switching Characteristics

tRISE, tFALL (10/90% RF)

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

0.7 - 4.0 GHz

400

420

ns

ns