Lower power operating modes are in high demand for battery powered systems, downhole applications and process control systems that operate in 4 mA to 20 mA loops. Analog Devices offers a micropower digital isolator which consumes <23 μA of quiescent current in shutdown mode. The ADM3483 3.3 V, 250 kbps RS-485 transceiver offers extremely low quiescent current, with typically only 2 nA required for shutdown mode.