TLK2711A: Alternative Device to be used with existing design using TLK2711

Hello Luis,

Thanks for your prompt response.

Best regards,

Mizanur

Hi Luis,

Thank you for your inputs,

1. I would like to know if the customer could use TLK2501  http://www.ti.com/product/tlk2501 as alternative to TLK2711 ( TLK2711 from one side and can work in collaboration to TLK2501 in the other side)?

2. Please provide an application note for single coax cable communication between a couple TLK2711 devices (or transmitter could be the newest substitution).

   The receive side of the existed design uses just one of two inputs (positive as instance) and the second one connected to GND through 50 Ohms resistor. We need to design a transmit side to interconnect with the client's existed equipment.

   Is it feasible?

   Do you have any application note or recommendations on this?

Additional clarification: TLK2711A is AC coupled on the receive side. So the N-input is connected to GND through capacitor and 50 Ohm resistor in series and P-input receives the signal through single ended coax cable.

Thanks in advance

BR

Shai Berman

Hi Luis,

There is any update regarding implemented a single coax connection?

Thanks and Regards,

Shai Berman

Hello, 

I have asked before about  any repeater / equalizer device up to 2Gbps that has the same line driving capabilities like TLK2711:

"built-in pre-emphasis feature to compensate for AC losses when driving a cable or PCB backplane trace over a long distance (5% & 20%)".

I am looking for a single serial-to-serial  line driver (VML ?)  without 8B/10B encoding – just repeater with built-in pre-emphasis feature suitable to TLK2711 receiver.

All serializing and 8B/10B coding can be done in FPGA transceivers before the line driver.

The receiver must be TLK2711 of TI (existed equipment) but transmitter can be any compatible device even of other manufacturers.

Additionally, since our TLK2711 receiver is AC coupled could you recommend a PECL level repeater (serial-to-serial) with built-in pre-emphasis feature suitable to TLK2711 receiver (our physical link is up to 15 meters length)

The following is from TLK2711 Data Sheet:

"The high-speed data output driver consists of a voltage mode logic (VML) differential pair optimized for a 50 Ohm impedance environment. The magnitude of the differential pair signal swing is compatible with pseudo emitter coupled logic (PECL) levels when ac-coupled. The line can be directly-coupled or ac-coupled. Refer to Figure 11 and Figure 12 for termination details. The outputs also provide preemphasis to compensate for ac loss when driving a cable or PCB backplane trace over a long distance (see Figure 4). The level of preemphasis is controlled by PRE as shown in Table 2 .

Please advise?

What about a CML buffer/driver instead of VML or PECL.

There is pre-emphasis and the same output voltage 800mV like VML/PECL. This option is not mentioned in TLK2711 data sheet.

Please check the proposal.

If it's OK please recommend a suitable device and provide the schematic draft.

Thanks in advance.

Shai Berman