Digitally Controlled Attenuators

Offering options that include digital control with up to 4K of resolution, any desired control input slope characteristic, narrowband optimized performance, temperature compensation, video filtering and sub-assembly integration.  Operating frequency ranges span from 250 MHz to 40 GHz in up to 9:1 bandwidths.

 

 Frequency Ranges:  From 250 MHz to 40 GHz, any optimized bandwidth is available.

 

 TTL Compatible Logic:  Binary logic Digital-to-Analog converter with 8 inputs:  Logic ‘1’/BIT = 256 discrete values of attenuation or all Logic ‘0’ = Insertion Loss.  Any resolution up to 12 BITs is available.

 

 High Speed Switching:  Attenuators listed are measured from any set value to any set value.  Switching speeds up to 300 ƞSec on request.

 

 Low DC Power Consumption:  Attenuators require ±15 VDC, ±1% @ +100/-50 mA.

 

 Operating Temperature Range:  Standard models include temperature compensation in a range from 0° to +50° C.  For more severe environments, please consult the factory.

 

 Stable Attenuation:  Variation vs. temperature from -55° to +85° C is typically ±10% of the set value.  Temperature compensated models are ±2%.

 

 High RF Power Handling:  For power levels greater than listed, please consult the factory.

 

 Standard Interfaces:  RF port connectors are ‘SMA’ female per MIL-C-39012.  Please consult the factory for additional options.

 

Outline Sizes

Size Reference

‘A’ Dimension

IN/CM

‘B’ Dimension

IN/CM

‘C’ Dimension

IN/CM

‘D’ Dimension

IN/CM

1

3.00/7.62

2.50/6.35

2.75/6.99

2.25/5.72

2 & 3

2.00/5.08

2.50/6.35

1.75/4.45

2.25/5.72

4

3.00/7.62

3.13/7.94

2.75/6.99

2.88/7.31

5

4.75/12.07

4.50/11.43

4.50/11.43

4.25/10.80

 

Outline Diagram

 

 

Power/Logic Connections

Number of BITs

Logic PIN Assignments

+15 V PIN

-15 V PIN

Ground PIN

8

LSB @ 1 to MSB @ 8

13

14

15

10

LSB @ 1 to MSB @ 10

13

14

15

All unused PINs have no internal connections

 

For substantial improvement in performance, ask for optimized narrowband models.

 

  Electrical Specifications for Digitally Controlled Attenuators

Frequency Range

(GHz)

Attenuation

(dB)

Flatness vs. Frequency

Insertion Loss

(dB)

VSWR

Switching Speed, Harmonic Distortion, Input Power

Switching Speed, Harmonic Distortion, Input Power

Size Reference

0.225-2.0

32

± 3.50

4.50

2.0:1

7.0 µSec Max,

50 dBc Max,

+20 dBm Max

1.0 µSec Max, 30 dBc Max, +5 dBm Max

5

64

 ± 6.00

80

± 8.00

0.5-2.0

32

± 2.00

2.50

1.8:1

1

64

± 3.50

80

± 4.50

0.7 – 5.4

32

± 3.50

3.50

2.0:1

4

64

± 4.50

80

± 5.00

2.2:1

2.0-8.0

32

± 2.00

2.50

1.9:1

1.0 µSec Max, 35 dBc Max, +13 dBm Max

2

64

± 2.25

80

± 2.50

6.0-18.0

32

± 2.00

3.25

1.9:1

1.0 µSec Max, 35 dBc Max, +15 dBm Max

3

64

± 2.25

80

± 2.50

3.50

2.0:1

2.0-18.0

32

± 2.50

4.50

2.0:1

1.0 µSec Max, 35 dBc Max, +13 dBm Max

2

64

± 4.50

2.1:1

80

± 5.00

5.00

8.0-26.5

32

± 2.25

3.00

2.0:1

1.0 µSec Max, 35 dBc Max, +15 dBm Max

3

16.0-32.0

32

± 3.00

4.00

2.0:1

26.0-40.0

32

± 2.00

4.00

2.0:1