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2 dB LSB GaAs MMIC 3-BIT DIGITAL

ATTENUATOR, 0.7 - 3.7 GHz

General Description

Features

Functional Diagram

2 dB LSB Steps to 14 dB

Single Positive Control Per BIT

Monotonic: ±03 dB Bit Error Typical

Electrical Specifications,

T

Typical Applications

The HMC288MS8 & HMC288MS8E are broadband 3-

bit positive control GaAs IC digital attenuators in 8 lead

MSOP surface mount plastic packages. Covering 0.7 to

3.7 GHz, the insertion loss is typically less than 1.2 to

1.8 dB. The attenuator bit values are 2 (LSB), 4, and 8

dB for a total attenuation of 14 dB. Accuracy is excel-

lent at ± 0.3 dB typical with an IIP3 of up to +51 dBm.

Three bit control voltage inputs, toggled between 0 and

+3 to +5V, are used to select each attenuation state at

less than 50 uA each. A single Vdd bias of +3 to +5V

applied through an external 5K Ohm resistor is required

while occupying less than 14.8 mm2.

The HMC288MS8 / HMC288MS8E is ideal for:

• Cellular

• PCS, ISM, MMDS

• WLL applications

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 - 3.7 GHz

1.0

1.3

1.5

1.7

1.4

1.7

2.0

2.3

dB

dB

dB

dB

Attenuation Range

0.7 - 3.7 GHz

14

dB

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

0.7 - 1.4 GHz

1.4 - 2.3 GHz

2.3 - 2.7 GHz

2.7 - 3.7 GHz

14

11

10

9

17

15

14

12

dB

dB

dB

dB

Attenuation Accuracy: (Referenced to Insertion Loss)

All Attenuation States

All Attenuation States

All Attenuation States

All Attenuation States

0.7 - 1.4 GHz

1.4 - 2.3 GHz

2.3 - 2.7 GHz

2.7 - 3.7 GHz

± 0.3 + 3% of Atten. Setting Max

± 0.2 + 3% of Atten. Setting Max

± 0.3 + 3% of Atten. Setting Max

± 0.3 + 4% of Atten. Setting Max

dB

dB

dB

dB

Input Power for 0.1 dB Compression

5V

3V

0.7 - 3.7 GHz

25

22

dBm

dBm

Input Third Order Intercept Point

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

5V

3V

0.7 - 3.7 GHz

51

47

dBm

dBm

Switching Characteristics

tRISE, tFALL (10/90% RF)

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

0.7 - 3.7 GHz

560

600

ns

ns

v01.0705