ON Semiconductor has expanded its family of modems targeted at highway addressable remote transducer (HART) industrial communication implementations. With this latest product introduction, ON Semiconductor, who recently became a member of the HART foundation (www.hartcomm.org), now offers solutions for low power HART applications.
The new NCN5193 is a single-chip CMOS device which supports Bell 202 shift frequencies between 1200 hertz (Hz) and 2200 Hz and is capable of delivering a 1200 bit per second (bps) half-duplex data rate. With a built-in power amplifier, a 17-bit sigma-delta digital-to-analog converter (DAC) and an extremely responsive watchdog mechanism, it presents engineers with a very sophisticated HART solution, that is both cost-effective and space saving. It has a voltage range of 3 volt (V) to 5.5 V and draws only 190 microamps (µA) while in standby mode with the system clock running (76 µA with no clock). In order to keep its power budget to a minimum the receive circuitry is disabled during transmission phases and, likewise, the transmit circuitry is disabled when the IC is in the process of receiving.
The modem IC has an operational temperature range that spans from -40°C to +85°C, allowing it to be deployed in industrial environments. Thanks to the high level of integration offered by the NCN5193, only a small number of external component parts are required. The NCN5193GEVB evaluation board, which includes all external components necessary for operation, helps to ease the design of HART implementations using the NCN5193.
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