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Visit www.macomtech.com for additional data sheets and product information.

M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make

changes to the product(s) or information contained herein without notice.

2

Digital Attenuator, 1-Bit, 15 dB

DC - 2.0 GHz

Rev. V4

AT-267

ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions

is considering for development. Performance is based on target specifications, simulated results,

and/or prototype measurements. Commitment to develop is not guaranteed.

PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology

Solutions has under development. Performance is based on engineering tests. Specifications are

typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.

Commitment to produce in volume is not guaranteed.

Truth Table

4,5

Mode

(Control)

V1

V2

Attenuation

Positive

4

0 ± 0.2V

+2.5V to +5V

+2.5V to +5V

0 ± 0.2V

15 dB

Reference State

Negative

5

0 ± 0.2V

-2.5V to -5V

-2.5V to -5V

0 ± 0.2V

Reference State

15 dB

4. External DC blocking capacitors are required as noted.

5. If negative control is used, DC blocking capacitors are not

required on RF ports and ground.

Electrical Specifications

Ω

Positive Control Voltage Schematic

SOT-25

Parameter

Test Conditions

Units

Min

Typ

Max

Insertion Loss

(Reference State)

1.0 GHz

2.0 GHz

dB

—

—

0.3

0.4

0.4

0.5

Attenuation

1.0 GHz

2.0 GHz

dB

dB

14.6

14.4

15.1

14.9

15.6

15.4

VSWR

1.0 GHz

2.0 GHz

Ratio

Ratio

—

—

1.2:1

1.3:1

—

—

1.0 GHz

Insertion Loss State

Attenuation State

dBm

dBm

40

40

50

50

—

—

1.0 GHz

Insertion Loss State

Attenuation State

dBm

dBm

24

20

26

23

—

—

Control Current

—

µA

—

—

10

Trise, Tfall

10% to 90% RF, 90% to 10% RF

nS

—

29

—

Ton, Toff

50% Control to 90% RF,

50% Control to 10% RF

nS

—

50

—

Transients

In-band

mV

—

10

—

3. For positive voltage control, external DC blocking capacitors are required on all RF ports (pins 1, 2 and 3).

5

4

1

3

2

39 pF

39 pF

39 pF