integrated circuit.

and within 5˚C of each other within the operating temperature range.

Parameter Measurement Information

Typical Application

Applications Information

General application guidelines and hints for LVDS drivers

and receivers may be found in the following application

notes: LVDS Owner’s Manual (lit #550062-001), AN808,

AN1035, AN977, AN971, AN916, AN805, AN903.

LVDS drivers and receivers are intended to be primarily used

in an uncomplicated point-to-point configuration as is shown

in

Figure 3. This configuration provides a clean signaling en-

vironment for the fast edge rates of the drivers. The receiver

is connected to the driver through a balanced media which

may be a standard twisted pair cable, a parallel pair cable, or

simply PCB traces. Typically the characteristic impedance of

the media is in the range of 100

Ω. A termination resistor of

100

Ω should be selected to match the media, and is located

as close to the receiver input pins as possible. The termina-

tion resistor converts the driver output (current mode) into a

voltage that is detected by the receiver. Other configurations

are possible such as a multi-receiver configuration, but the

effects of a mid-stream connector(s), cable stub(s), and

other impedance discontinuities as well as ground shifting,

noise margin limits, and total termination loading must be

taken into account.

The DS90LV028A differential line receiver is capable of de-

range centered around +1.2V. This is related to the driver off-

DS100077-3

FIGURE 1. Receiver Propagation Delay and Transition Time Test Circuit

DS100077-4

FIGURE 2. Receiver Propagation Delay and Transition Time Waveforms

Balanced System

DS100077-5

FIGURE 3. Point-to-Point Application

3

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