DS30BA101

OUT-

IN+

IN-

OUT+

0.1 PF

50:

50:

953:

100:

1 PF

1 PF

1 PF

1 PF

DS30EA101

IN+

IN-

100:

OUT+

OUT-

VCC

100: Differential TP Cable

RVO

DS30BA101

SNLS403A – FEBRUARY 2012 – REVISED APRIL 2013

www.ti.com

DEVICE OPERATION

INPUT INTERFACING

The DS30BA101 accepts either differential or single-ended input. DC-coupled inputs must be kept within the

specified common-mode range.

OUTPUT INTERFACING

The DS30BA101 uses current mode outputs. Single-ended output levels are 800 mVP-P into 75Ω AC-coupled

coaxial cable with an RVO resistor of 750Ω, or 400 mVP-P (800 mVP-P differential) into 100Ω differential cable with

an RVO resistor of 953Ω. The output voltage level is controlled by the value of the RVO resistor connected

between the RVO pin and VCC.

The RVO resistor should be placed as close as possible to the RVO pin. In addition, the copper in the plane layers

below the RVO network should be removed to minimize parasitic capacitance.

Figure 2 and Figure 3 show the typical configurations for differential output and single-ended output, respectively.

For single-ended output, the unused output must be properly terminated as shown.

APPLICATION INFORMATION

CABLE EXTENDER APPLICATION

The DS30BA101 together with the DS30EA101 form a cable extender chipset optimized for extending serial data

streams from serializer/deseralizer (SerDes) pairs and FPGAs over 100

Ω differential cables and 75Ω coaxial

cables. Setting the correct DS30BA101 output amplitude and proper cable termination are essential for optimal

operation. Figure 2 shows the recommended chipset configuration for 100

Ω differential cable and Figure 3 shows

the recommended chipset configuration for 75

Ω coaxial cable.

Figure 2. Cable Extender Chipset Application Circuit for 100

Ω Differential Cable

4

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