F1956

Rev 2 04/08/2016

5

7-Bit 0.25 dB Wideband Digital Step Attenuator

Attenuation D[6:0] = [0000000], Maximum Attenuation D[6:0] = [1111111], EVKit losses are de-embedded unless

otherwise noted.

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Insertion Loss

IL

1.3

1.8

dB

1.3

1.9

1.6

2.2

2.1

2.6

2.6

3.0

Relative Phase

(Amin vs. Amax)

ΦΔ

12

deg

25

55

90

Step Error

(Differential Non-Linearity)

DNL

Max error between adjacent

steps

0.10

0.19

dB

Absolute Attenuation Error

(Integral Non-Linearity)

INL

Max Error for state 19.75 dB,

FRF = 2 GHz

-0.4

0.1

+0.5

dB

Max Error, over all states

-0.8

+0.5

Input Return Loss

20

15

dB

20

15

14

7

Output Return Loss

18

14

dB

16

12

11

7

Input IP3

IIP3

50 MHz Tone Separation

Attn = 0.00 dB

64

dBm

Attn = 15.75 dB

64

Attn = 31.75 dB

64

Attn = 0.00 dB

1 MHz Tone Separation

60

63.4

dBm

60

63.4

60

64.1

60

63.3

34.5

dBm

Specification Notes:

Note 1:

Items in min/max columns in

bold italics are Guaranteed by Test.

Note 2:

Items in min/max columns that are not bold/italics are Guaranteed by Design Characterization.

Note 3.

The input 0.1 dB compression point is used as a linearity figure of merit. The recommended maximum input power is specified as the

lesser of the two values from RF CW Power (Figure 1) and the RF Average Power (Recommended Operating Conditions Table)..

Note 4:

Spurious due to on-chip negative voltage generator. Typical generator fundamental frequency is 2.2 MHz.