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TUSB1002

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SLLSEU4A – MAY 2016 – REVISED MAY 2016

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Table 2. EQ Configuration Options for 1200mV Linearity 0 dB DC Gain Setting

EQ SETTING #

CHx_EQ2 PIN LEVEL

CHx_EQ1 PIN LEVEL

EQ GAIN at 2.5GHz / 5

GHz (dB)

1

0

0

1.9 / 5.5

2

0

R

2.8 / 7.1

3

0

F

3.5 / 8.2

4

0

1

4.4 / 9.3

5

R

0

5.0 / 10.2

6

R

R

5.8 / 11.1

7

R

F

6.4 / 11.8

8

R

1

7.1 / 12.6

9

F

0

7.6 / 13.1

10

F

R

8.2 / 13.8

11

F

F

8.7 / 14.3

12

F

1

9.2 / 14.8

13

1

0

9.6 / 15.2

14

1

R

10.1 / 15.6

15

1

F

Reserved.

16

1

1

Reserved.

7.3.3 Adjustable VOD Linear Range and DC Gain

The CFG1 and CFG2 pins can be used to adjust the TUSB1002 output voltage swing linear range and receiver

equalization DC gain. Table 3 details the available options.

For best performance, the TUSB1002 should be operated within its defined VOD linearity range. The gain of the

incoming VID should be kept to less than or equal to the TUSB1002 VOD linear range setting. The can be

determined by Equation 1:

VID at 5 GHz = VOD x (10

where

•

Gv = TUSB1002 Gain and VOD = TUSB100 VOD linearity setting.

(1)

For example, for a VOD linearity range setting of 1200 mV, the maximum incoming VID signal at 5 GHz with a

VOD linear range but jitter will be higher.

Table 3. VOD Linear Range and DC Gain

SETTING #

CFG1 PIN LEVEL

CFG2 PIN LEVEL

CH1 DC GAIN (dB)

CH2 DC GAIN (dB)

RANGE (mVpp)

RANGE (mVpp)

1

0

0

+1

0

900

900

2

0

R

0

+1

900

900

3

0

F

0

0

900

900

4

0

1

+1

+1

900

900

5

R

0

0

0

1000

1000

6

R

R

+1

0

1000

1000

7

R

F

0

-1

1000

1000

8

R

1

+2

+2

1000

1000

9

F

0

-1

-1

1200

1200

10

F

R

-2

-2

1200

1200

11

F

F

0

0

1200

1200

12

F

1

+1

+1

1200

1200

13

1

0

-1

0

1200

1200

14

1

R

0

-1

1200

1200

15

1

F

0

+1

1200

1200

16

1

1

+1

0

1200

1200