Web Analytics
Datasheet 搜索 > LVDS、M-LVDS、ECL、CML > TI(德州仪器) > DS90C032E-QML 数据手册 > DS90C032E-QML 其他数据使用手册 5/11 页
DS90C032E-QML
307.69
导航目录
  • 引脚图在P7
  • 典型应用电路图在P1P5
  • 封装尺寸在P9P10P11
  • 型号编码规则在P7
  • 功能描述在P1
  • 技术参数、封装参数在P2P3
  • 应用领域在P5P6P7P8
  • 电气规格在P2P3
DS90C032E-QML数据手册
Page:
of 11 Go
若手册格式错乱,请下载阅览PDF原文件
Parameter Measurement Information (Continued)
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 intendedto beprimarily used
in an uncomplicated point-to-point configuration as is shown
in
Figure 6
. This configuration provides a clean signaling en-
vironment for the quick edge rates of the drivers. The re-
ceiver 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 dif-
ferential impedance of the media is in the range of 100.A
termination resistor of 100 should be selected to match the
media, and is located as close to the receiver input pins as
possible. The termination resistor converts the current
sourced by the driver intoa voltage thatis detected by the re-
ceiver. 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 disconti-
nuities as well as ground shifting, noise margin limits, and to-
tal termination loading must be taken into account.
The DS90LV031A differential line driver is a balanced cur-
rent source design. A current mode driver, generally speak-
ing has a high output impedance and supplies a constant
current for a range of loads (a voltage mode driver on the
other hand supplies a constant voltage for a range of loads).
Current is switched through the load in one direction to pro-
duce a logic state and in the other direction to produce the
other logic state. The output current is typically 3.5 mA, a
minimum of 2.5 mA, and a maximum of 4.5 mA. The current
mode requires (as discussed above) that a resistive termi-
nation be employed to terminate the signal and to complete
the loop as shown in
Figure 6
. AC or unterminated configu-
rations are not allowed. The 3.5 mAloop current will develop
a differential voltage of 350 mV across the 100 termination
resistor which the receiver detects with a 250 mV minimum
differential noise margin neglecting resistive line losses
(driven signal minus receiver threshold (350 mV 100 mV
=
250 mV)). The signal is centered around +1.2V (Driver Off-
set, V
OS
) with respect to ground as shown in
Figure 7
. Note
that the steady-state voltage (V
SS
) peak-to-peak swing is
twice the differential voltage (V
OD
) and is typically 700 mV.
The current mode driver provides substantial benefits over
voltage mode drivers, such as an RS-422 driver. Its quies-
cent current remains relatively flat versus switching fre-
quency. Whereas the RS-422 voltage mode driver increases
exponentially in most case between 20 MHz50 MHz. This
is due to the overlap current that flows between the rails of
the device when the internal gates switch. Whereas the cur-
rent mode driver switches a fixed current between its output
without any substantial overlap current. This is similar to
some ECL and PECL devices, but without the heavy static
I
CC
requirements of the ECL/PECL designs. LVDS requires
>
80
%
less current than similar PECLdevices.AC specifica-
tions for the driver are a tenfold improvement over other ex-
isting RS-422 drivers.
DS100095-7
FIGURE 5. Driver TRI-STATE Delay Waveform
DS100095-8
FIGURE 6. Point-to-Point Application
www.national.com5

DS90C032E-QML 数据手册

TI(德州仪器)
19 页 / 0.7 MByte
TI(德州仪器)
11 页 / 0.17 MByte

DS90C032 数据手册

National Semiconductor(美国国家半导体)
LVDS四通道CMOS差分线路接收器 LVDS Quad CMOS Differential Line Receiver
TI(德州仪器)
LVDS 四路 CMOS 差动线路接收器
TI(德州仪器)
DS90C032 LVDS四通道CMOS差分线路接收器 DS90C032 LVDS Quad CMOS Differential Line Receiver
TI(德州仪器)
TEXAS INSTRUMENTS  DS90C032TM/NOPB  驱动器, LVDS, 四路, 差分接收, 1 ns, 11 mA, -40 °C, 85 °C, 4.5 V
TI(德州仪器)
TEXAS INSTRUMENTS  DS90C032BTM/NOPB  驱动器, LVDS, 四路, 差分接收, 1 ns, 11 mA, -40 °C, 85 °C, 4.5 V
TI(德州仪器)
LVDS 四路 CMOS 差分线路接收器 16-SOIC -40 to 85
TI(德州仪器)
TEXAS INSTRUMENTS  DS90C032TM  驱动器, LVDS, 四路, 差分接收, 1 ns, 11 mA, -40 °C, 85 °C, 4.5 V
TI(德州仪器)
LVDS 四路 CMOS 差分线路接收器 16-SOIC -40 to 85
TI(德州仪器)
DS90C032BTM 管装
器件 Datasheet 文档搜索
器件加载中...
AiEMA 数据库涵盖高达 72,405,303 个元件的数据手册,每天更新 5,000 多个 PDF 文件