ADM1487 Datasheet | Analog Devices

FEATURES Low Power - 120µA Max ICC with Driver Disabled High Input Impedance - Up to 256 Transceivers on Bus GENERAL DESCRIPTION The ADM1487 is an ultra-low power RS-485/RS-422 transceiver consisting of one driver and one receiver per package. Quiescent operating current is typically 80µA and 1µA in shutdown mode. The driver and receiver both have three-state outputs. This allows multiple drivers to be connected to an RS-485/RS-422 bus, or several receiver outputs to be connected to a serial data bus. The driver will maintain a high-impedance output state even with power off, while the receiver features fail-safe operation that guarantees a logic high output if the inputs are left open-circuit. The device has slew-rate limited drivers to minimize electromagnetic interference (EMI) and reduce reflections caused by incorrectly terminated cables. ±10k V ESD Protection (Human Body Model) on RS-485 I/O pins Thermal Protection of Driver Glitch-Free Driver Power-Up Allows Hot Connection Driver Maintains High Output Impedance with Power Off Wide mon-Mode Range Allows ±7V Ground Differences Between Devices Pin-patible with Industry Standard 75176 APPLICATIONS Battery-Powered RS-485/RS-422 Systems Level Translation FUNCTIONAL BLOCK DIAGRAM w w w .D at a S he et 4U .c om RO RE DE DI 8 7 6 VCC B A GND 2 3 4 REV. Pr C 08/02 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P .O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 .analog. Fax: 781/326-8703 Analog Devices, Inc., 2002 - 1- .. PRELIMINARY TECHNICAL DATA ADM1487 ADM1487 SPECIFICATIONS DC ELECTRICAL CHARACTERISTICS (VCC = +5V ±5%, TA = 0°C TO +70°C,...