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ADM1487

Analog Devices
Part Number ADM1487
Manufacturer Analog Devices
Description Ultralow Power RS-485/RS-422 Transceiver
Published Dec 14, 2005
Detailed Description PRELIMINARY TECHNICAL DATA a Low-Current (1µA) Shutdown Mode Slew Rate Control for Error-Free Data Transmission and Low...
Datasheet PDF File ADM1487 PDF File

ADM1487
ADM1487

Overview
PRELIMINARY TECHNICAL DATA a Low-Current (1µA) Shutdown Mode Slew Rate Control for Error-Free Data Transmission and Low EMI Ultra-Low Power RS-485/RS-422 Transceiver with Low EMI and +/-10kV ESD Protection Preliminary Technical Data FEATURES Low Power - 120µA Max ICC with Driver Disabled High Input Impedance — Up to 256 Transceivers on Bus GENERAL DESCRIPTION ADM1487 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.
±10kV 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 Common-Mode Range Allows ±7V Ground Differences Between Devices Pin-Compatible with Industry Standard 75176 APPLICATIONS Battery-Powered RS-485/RS-422 Systems Level Translation FUNCTIONAL BLOCK DIAGRAM w w w .
D at aS he et 4U .
c om RO RE DE DI 1 R 8 7 6 D VCC B A GND 2 3 4 5 ADM1487 REV.
PrC 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.
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