DEMO-board schematic:

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Presentation transcript:

DEMO-board schematic: http://www.ti.com/lit/df/snlr010/snlr010.pdf Please take a look that receiver side is pull down (through cap) in DEMO-board. Do you still need customer’s own schematic? ( Customer do not want to open in e2e if available ) Please mind that the drawing (Before/After) page 2 of this ppt file is which customer had sent to me. Transmitter side: Pull Up TPTDP/TPTDM: Transmitter TPRDP/TPRDM: Receiver Receiver side: Pull down( through cap)

CAT5 cable Before: following Data sheet Fig2 : Bit Error rate 10^-6 for 100m cable (1) After : remove red circle as DEMO-board(2) case : No error (1)In case ~10m , no problem even ‘ Before’ case (2)http://www.ti.com/lit/df/snlr010/snlr010.pdf

Before Vcm=3.3V After Vcm is ~ 1.5V As per customer, even tough ‘Before’ case, Peak to peak differential voltage , and its slew rate should be same , no deformation even though ‘ Before ‘ case. Question : Data sheet Fig6-2 is correct? Or DEMO-board(snlr010.odf is correct?) Customer think DP83816 has equalizer inside, so customer think it should be work with no-error even though ‘ Before’ case, but please advise customer’s corrective action is correctly or no. ( Customer don’t know internal bias of receiver circuit at TPRDP/DM, but he should follow data sheet as ‘Before’ case??)