DS90LV028AQ_14 Datasheet, PDF (4/16 Pages) Texas Instruments – Automotive LVDS Dual Differential Line Receiver

DS90LV028AQ, DS90LV028AQ-Q1
SNLS299E – MAY 2008 – REVISED APRIL 2013
Parameter Measurement Information
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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 100Ω. 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
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