DPD Demodulator for PA Linearization

1300MHz to 2900MHz

IDT Zero-Distortion

9

Rev4, January 2014

PRELIMINARY DATASHEET

IDTF1370NBGI

Datasheet

The F1370 gain/attenuation setting is controlled by 6 bits in the data word. The device provides an added attenuation

range from 0 dB to 25.5 dB in 0.5 dB steps. A “high” or “1” bit corresponds to attenuation stepped IN, while a “low” or

“0” bit corresponds to attenuation stepped OUT.

Because the first and last bits of the Data Word are not presently used by the F1370, two additional hex character

pairs exists for each of those in this table. For example, data words of either H00, H80, or H01 (binary

“00000000,” “10000000,” or 00000001) will place the F1370 in its minimum attenuation state. Likewise, data

words of either H66, HE6, or H67 (binary “01100110” or “11100110” or “01100111”) will place the F1370 in its

maximum attenuation state of 25.5 added attenuation.

F1370 DPD Demodulator - Attenuation Table (Data Word D7-D0)

BINARY

HEX

Added Atten (dB)

BINARY

HEX

Added Atten (dB)

00000000

00

0

00110100

34

13

00000010

02

0.5

00110110

36

13.5

00000100

04

1

00111000

38

14

00000110

06

1.5

00111010

3A

14.5

00001000

08

2

00111100

3C

15

00001010

0A

2.5

00111110

3E

15.5

00001100

0C

3

01000000

40

16

00001110

0E

3.5

01000010

42

16.5

00010000

10

4

01000100

44

17

00010010

12

4.5

01000110

46

17.5

00010100

14

5

01001000

48

18

00010110

16

5.5

01001010

4A

18.5

00011000

18

6

01001100

4C

19

00011010

1A

6.5

01001110

4E

19.5

00011100

1C

7

01010000

50

20

00011110

1E

7.5

01010010

52

20.5

00100000

20

8

01010100

54

21

00100010

22

8.5

01010110

56

21.5

00100100

24

9

01011000

58

22

00100110

26

9.5

01011010

5A

22.5

00101000

28

10

01011100

5C

23

00101010

2A

10.5

01011110

5E

23.5

00101100

2C

11

01100000

60

24

00101110

2E

11.5

01100010

62

24.5

00110000

30

12

01100100

64

25

00110010

32

12.5

01100110

66

25.5