PDF ADN4663 Data sheet ( Hoja de datos )

Número de pieza	ADN4663
Descripción	LVDS High Speed Differential Driver
Fabricantes	Analog Devices
Logotipo
Hay una vista previa y un enlace de descarga de ADN4663 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas
No Preview Available ! www.DataSheet4U.com FEATURES ±15 kV ESD protection on output pins 600 Mbps (300 MHz) switching rates Flow-through pinout simplifies PCB layout 300 ps typical differential skew 700 ps maximum differential skew 1.5 ns maximum propagation delay 3.3 V power supply ±355 mV differential signaling Low power dissipation: 23 mW typical Interoperable with existing 5 V LVDS receivers Conforms to TIA/EIA-644 LVDS standard Industrial operating temperature range (−40°C to +85°C) Available in surface-mount (SOIC) package APPLICATIONS Backplane data transmission Cable data transmission Clock distribution GENERAL DESCRIPTION The ADN4663 is a dual, CMOS, low voltage differential signaling (LVDS) line driver offering data rates of over 600 Mbps (300 MHz), and ultralow power consumption. It features a flow-through pinout for easy PCB layout and separation of input and output signals. The device accepts low voltage TTL/CMOS logic signals and converts them to a differential current output of typically ±3.1 mA for driving a transmission medium such as a Dual, 3 V, CMOS, LVDS High Speed Differential Driver ADN4663 FUNCTIONAL BLOCK DIAGRAM VCC DIN1 ADN4663 DOUT1+ DOUT1– DIN2 DOUT2+ DOUT2– GND Figure 1. twisted-pair cable. The transmitted signal develops a differential voltage of typically ±355 mV across a termination resistor at the receiving end, and this is converted back to a TTL/CMOS logic level by a line receiver. The ADN4663 and a companion receiver offer a new solution to high speed point-to-point data transmission, and a low power alternative to emitter-coupled logic (ECL) or positive emitter-coupled logic (PECL). Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2009 Analog Devices, Inc. All rights reserved. 1 page www.DataSheet4U.com Test Circuits and Timing Diagrams VCC VCC DINx DOUTx+ RL/2 RL/2 VOS VOD VV DOUTx– Figure 2. Test Circuit for Driver VOD and VOS SIGNAL GENERATOR VCC DINx 50Ω DOUTx+ CL RL DOUTx– CL CL INCLUDES LOAD AND TEST JIG CAPACITANCE. Figure 3. Test Circuit for Driver Propagation Delay, Transition Time, and Maximum Operating Frequency DINx DOUTx– DOUTx+ 1.5V tPLHD 0V (DIFFERENTIAL) VOD 1.5V tPHLD 0V 3V 0V VOH VOL VDIFF 80% 80% 0V VDIFF = DOUT+ – DOUT– 0V 20% 20% tTHL tTHL Figure 4. Driver Propagation Delay and Transition Time Waveforms ADN4663 Rev. 0 \| Page 5 of 12 5 Page www.DataSheet4U.com 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. ADN4663 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. 0.1µF VCC +3.3V + 10µF TANTALUM +3.3V + VCC DINx ADN4663 DOUTx+ RT 100Ω DOUTx– DIN+ DIN– LVDS RECEIVER DOUT GND GND Figure 21. Typical Application Circuit Rev. 0 \| Page 11 of 12 11 Page

Páginas	Total 12 Páginas
PDF Descargar	[ Datasheet ADN4663.PDF ]

Hoja de datos destacado

Número de pieza	Descripción	Fabricantes
ADN4661	High Speed Differential Driver	Analog Devices
ADN4662	LVDS Differential Line Receiver	Analog Devices
ADN4663	Dual 3V CMOS LVDS High Speed Differential Driver	ANALOG DEVICES
ADN4663	LVDS High Speed Differential Driver	Analog Devices

Número de pieza	Descripción	Fabricantes
SLA6805M	High Voltage 3 phase Motor Driver IC.	Sanken
SDC1742	12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.	Analog Devices

DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.

DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar