Custom MMIC

300 Apollo Drive Chelmsford, MA 01824 Phone (978) 467-4290 Fax (978) 467-4294

Visit us online at www.custommmic.com

The CMD280C3 is a negative controlled,

wideband GaAs MMIC 5-bit digital attenuator

housed in a leadless 3x3 mm surface mount

package. 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

CMD280C3 has a low insertion loss of 3 at 10

GHz and the attenuation accuracy is typically

0.1 dB step error. The CMD280C3 is a 50 ohm

matched design which eliminates the need for

RF port matching.

► Wideband performance

► Low insertion loss

► Wide attenuation range

► Pb-free RoHs compliant 3x3 QFN package

Features

Description

Functional Block Diagram

ver 1.0 0618

Parameter

Min

Typ

Max

Units

Frequency Range

DC – 18

GHz

Insertion Loss

3

dB

Attenuation Range

15.5

dB

Input Return Loss

15

dB

Output Return Loss

14

dB

Input P0.1dB

24

dBm

Input IP3

42

dBm

Switching Speed

25

ns

CMD280C3

DC-18 GHz 5-bit Digital Attenuator