DS90LV028AQ, DS90LV028AQ-Q1

SNLS299E – MAY 2008 – REVISED APRIL 2013

www.ti.com

Parameter Measurement Information

Figure 2. Receiver Propagation Delay and Transition Time Test Circuit

Figure 3. Receiver Propagation Delay and Transition Time Waveforms

Typical Application

Figure 4. Balanced System

Point-to-Point Application

APPLICATION INFORMATION

General application guidelines and hints for LVDS drivers and receivers may be found in the following application

notes: LVDS Owner's Manual at www.ti.com.

LVDS drivers and receivers are intended to be primarily used in an uncomplicated point-to-point configuration as

is shown in Figure 4. This configuration provides a clean signaling environment 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 100Ω should be selected to match the media, and is located as close to

the receiver input pins as possible. The termination 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.

4

Submit Documentation Feedback

Copyright © 2008–2013, Texas Instruments Incorporated

Product Folder Links: DS90LV028AQ DS90LV028AQ-Q1