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Announcing Our New Digital Attenuator Product Line from DC-40 GHz

Posted on Monday, August 27, 2018
Announcing Our New Digital Attenuator Product Line from DC-40 GHz

We are excited to launch a new product line of GaAs Digital Step Attenuators (DSA).

The DSA family is intended to ease the design of high dynamic range receivers and instrumentation. These applications often must accomplish gain control of 50dB or more. Fine step DSAs (e.g., 0.5dB Least Significant Bit [LSB]) are often used for these applications. However, when a large attenuation change is needed, it is more efficient to use a lower bit count coarse (e.g., 2, 4 or even 8 dB LSB) step DSA MMIC as these parts offer lower insertion loss and fewer control lines for easier design implementation.

Table 1 summarizes the eight new products are now available covering up to 40GHz, with 0.5, 2 and 4dB step size options. Die and QFN packaged versions are available. The CMD281, CMD282, CMD281C3 and CMD282C3 represent initial offerings for coarse control 2 bit DSAs with 2 and 4 dB step control. The CMD279, CMD280, CMD279C3 and CMD280C3 are the more traditional 0.5dB step control devices with 15.5dB range (5 bit). All devices are single control line per bit.


TABLE 1

Digital Step Attenuator

Part Number

Frequency 

(GHz)

Number of Bits

Insert. Loss (dB)

Attn.
Range
(dB)

Step Size (dB)

Input
IP3
(dBm)

Control
Voltage
(V)

Package

 
 
 

CMD282

DC - 40

2

1.5

12

4

42

0 / -5

DIE

 

CMD281

DC - 40

2

1.2

6

2

42

0 / -5

DIE

 
 

CMD280

DC - 30

5

3

15.5

0.5

42

0 / -5

DIE

 
 

CMD281C3

DC - 22

2

1.5

6

2

42

0 / -5

3x3 mm QFN

 
 

CMD282C3

DC - 22

2

1.9

12

4

42

0 / -5

3x3 mm QFN

 
 

CMD280C3

DC – 18

5

3

15.5

0.5

42

0 / -5

3x3 mm QFN

 
 

CMD279C3

2 - 18

5

3.5

15.5

0.5

42

0 / +5

3x3 mm QFN

 
 

CMD279

2 - 30

5

3.5

15.5

0.5

42

0 / +5

DIE

 
 

Visit https://www.custommmic.com/digital-attenuators/ for more information and to download full datasheets and S-parameter data.

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Custom MMIC

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

Terms and Conditions

©2006-2018 Custom MMIC
All rights reserved.