ADA4356ABCZ datasheet(45/61 Pages) AD

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Data Sheet

ADA4356

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Rev. 0

45 of 61

Figure 93. Data Eye for LVDS Outputs in ANSI-644 Mode with Trace Lengths of Less than 24inches (Approximate 6inch Trace

Length Result Shown) on Standard FR-4 Material, External 100Ω Far End Termination Only

Figure 94 shows a time interval error (TIE) jitter histogram with trace lengths of less than 24inches on standard FR-4

material.

Figure 94.TIE Jitter Histogram for Trace Lengths Less than 24inches (Approximate 6inch Trace Length Result Shown) on

Standard FR-4 Material

The TIE jitter histogram reflects the decrease of the data eye opening because the edge deviates from the ideal

position. It is the responsibility of the user to determine if the waveforms meet the timing budget of the design.

The format of the output data is two’s complement by default. For an example of the output coding format, see Table

14. To change the output data format to offset binary, see the Memory Map section.

Immediately after power-on, the ADA4356 output serial stream sets as double data rate (DDR), 2-lane, byte wise, MSB

first, 1× frame, and 16-bit mode. In this default setting, the ADA4356 data rate for each serial stream is equal to (16

bits × the sample clock rate)/2 lanes, with a maximum of 1 Gbps per lane ((16 bits × 125 MSPS)/2-lanes = 1Gbps per

lane).

Figure 95 shows an example of the LVDS output data eye using the ANSI-644 standard (default) with trace lengths

greater than 24inches on standard FR-4 material.

500

400

300

200

100

–500

–400

–300

–200

–100

–0.8

–0.4

0.4

0.8

EYE: ALL BITS

ULS: 7000/400354

TIME (ns)

200

250

300

350

TIME (ps)

400

450

500

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