Custom MMIC

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The CMD280 is negative controlled, wideband

GaAs MMIC 5-bit digital attenuator die which

operates from DC to 30 GHz. Each bit of the

attenuator is controlled by a single voltage of

either 0 V or –5 V. The attenuator bit values are

0.5 (LSB), 1, 2, 4, and 8 dB, for a total

attenuation of 15.5 dB. The CMD280 has a low

insertion loss of 3 dB at 10 GHz and the

attenuation accuracy is typically 0.1 dB step

error. The CMD280 is a 50 ohm matched design

which eliminates the need for RF port matching.

The

CMD280

offers

full

passivation

for

increased reliability and moisture protection.

► Ultra wideband performance

► Low insertion loss

► Wide attenuation range

► Small die size

Features

Description

Functional Block Diagram

ver 1.0 0418

Parameter

Min

Typ

Max

Units

Frequency Range

DC – 30

GHz

Insertion Loss

3

dB

Attenuation Range

15.5

dB

Input Return Loss

15

dB

Output Return Loss

15

dB

Input P0.1dB

24

dBm

Input IP3

42

dBm

Switching Speed

25

ns

CMD280

DC-30 GHz 5-bit Digital Attenuator

1

8

RF1

Vee

P0

P1

P2

P3

P4

7

6

5

4

3

2

RF2