TDP158 datasheet(17/55 Pages) TI1

17 / 55 page

0.5

Coax

Device

SMA

Avcc

(4)

(5)

AVcc

Jitter Test

Instrument

(2,3)

TTP4

TTP2

TTP1

FR4 PCB trace

(1) &

AC coupling Caps

FR4 PCB trace

+EQ

OUT

+EQ

OUT

SMA

TTP3

Jitter Test

Instrument

(2,3)

Data +

Data -

Clk+

Clk-

Parallel

(6)

BERT

[No Pre-

emphasis]

REF

Cable

REF

Cable

TTP4_EQ

TTP2_EQ

TDP158

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SLLSEX2 – DECEMBER 2016

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Parameter Measurement Information (continued)

(1)

The FR4 trace between TTP1 and TTP2 is designed to emulate 1-8” of FR4, AC coupling cap, connector and another

1-8” of FR4. Trace width – 4 mils. 100 Ω differential impedance.

(2)

All Jitter is measured at a BER of 109

(3)

Residual jitter reflects the total jitter measured at TTP4 minus the jitter measured at TTP

(4)

AVCC = 3.3 V

(5)

RT = 50 Ω

(6)

The input signal from parallel Bert does not have any pre-emphasis. Refer to recommended operating conditions.

Figure 10. HDMI Output Jitter Measurement

Figure 11. Output Eye Mask at TTP4_EQ for HDMI 2.0

TMDS Data Rate (Gbps)

H (Tbit)

V (mV)

3.4 < DR < 3.712

0.6

335

3.712 < DR < 5.94

–0.0332Rbit2 + 0.2312 Rbit + 0.1998

–19.66Rbit2 + 106.74Rbit + 209.58

5.94

≤ DR ≤ 6.0

0.4

150

TDP158 데이터시트(PDF) 17 Page - Texas Instruments

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