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| 型号： | ADN4663BRZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 3/12页 |
| 文件大小： | 0K |
| 描述： | IC DRIVER DIFF LVDS 2CH 8SOIC |
| 标准包装： | 98 |
| 类型： | 驱动器 |
| 驱动器/接收器数： | 2/0 |
| 规程： | LVDS |
| 电源电压： | 3 V ~ 3.6 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 管件 |
| 产品目录页面： | 766 (CN2011-ZH PDF) |
ADN4663
Rev. 0 | Page 11 of 12
THEORY OF OPERATION
The ADN4663 is a dual line driver for low voltage differential
signaling. It takes a single-ended 3 V logic signal and converts
it to a differential current output. The data can then be transmitted
for considerable distances, over media such as a twisted-pair cable
or PCB backplane, to an LVDS receiver, where it develops a voltage
across a terminating resistor, RT. This resistor is chosen to match
the characteristic impedance of the medium, typically around
100 Ω. The differential voltage is detected by the receiver and
converted back into a single-ended logic signal.
When DINx is high (Logic 1), current flows out of the DOUTx+ pin
(current source) through RT and back into the DOUTx pin (current
sink). At the receiver, this current develops a positive differential
voltage across RT (with respect to the inverting input) and results
in a Logic 1 at the receiver output. When DINx is low, DOUTx+
sinks current and DOUTx sources current; a negative differential
voltage across RT results in a Logic 0 at the receiver output.
The output drive current is between ±2.5 mA and ±4.5 mA
(typically ±3.55 mA), developing between ±250 mV and ±450 mV
across a 100 Ω termination resistor. The received voltage is centered
around the receiver offset of 1.2 V. Therefore, the noninverting
receiver input is typically (1.2 V + [355 mV/2]) = 1.377 V, and
the inverting receiver input is (1.2 V [355 mV/2]) = 1.023 V
for Logic 1. For Logic 0, the inverting and noninverting output
voltages are reversed. Note that because the differential voltage
reverses polarity, the peak-to-peak voltage swing across RT is
twice the differential voltage.
Current mode drivers offer considerable advantages over
voltage mode drivers such as RS-422 drivers. The operating
current remains fairly constant with increased switching
frequency, whereas that of voltage mode drivers increase
exponentially in most cases. This is caused by the overlap
as internal gates switch between high and low, which causes
currents to flow from the device power supply to ground.
A current mode device simply reverses a constant current
between its two outputs, with no significant overlap currents.
This is similar to emitter-coupled logic (ECL) and positive
emitter-coupled logic (PECL), but without the high quiescent
current of ECL and PECL.
APPLICATIONS INFORMATION
Figure 21 shows a typical application for point-to-point data
transmission using the ADN4663 as the driver and a LVDS
receiver.
DOUT
DINx
RT
100
0.1F
10F
TANTALUM
+
DOUTx+
DOUTx–
DIN+
DIN–
VCC
GND
ADN4663
+3.3V
LVDS RECEIVER
GND
+
07
92
7-
0
21
Figure 21. Typical Application Circuit
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADN4663BRZ | 制造商:Analog Devices 功能描述:Transceiver IC |
| ADN4663BRZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:Dual, 3 V, CMOS, LVDS High Speed Differential Driver |
| ADN4663BRZ-REEL7 | 功能描述:IC DRIVER DIFF LVDS 2CH 8SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:121 系列:- 类型:收发器 驱动器/接收器数:1/1 规程:RS422，RS485 电源电压:3 V ~ 3.6 V 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-DFN（3x3） 包装:管件 |
| ADN4663BRZ-REEL71 | 制造商:AD 制造商全称:Analog Devices 功能描述:Dual, 3 V, CMOS, LVDS High Speed Differential Driver |
| ADN4664 | 制造商:AD 制造商全称:Analog Devices 功能描述:LVDS and M-LVDS Circuit Implementation Guide |
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