CHT-RHEA Datasheet | CISSOID

Description The CHT-RHEA is a high-temperature, high reliability integrated circuit that implements a dual-channel full duplex isolated data transceiver. It can be used in any application where there is a need to galvanically isolate a digital data line. The galvanic isolation is achieved by means of an external pulse transformer for each digital signal. The CHT-RHEA integrates in a single package 2 transceivers (2 transmit and 2 receive channels). A plete 4 lines data transmission (2 full duplex channels) requires 2 instances of CHT-RHEA, one being connected to the primary side of the transformers and one to the secondary side. Each transmit channel (Tx) implements a modulation block using a circuit’s built-in clock generator, which frequency can be programmed with one among 7 different values inside the range [5.9-15.3 Mhz]. Each receive channel (Rx) demodulates the signal ing from the transformer. The data transmission rate is up to 2 Mbit/s. During power-up of the circuit, the output signals can be forced to the 0 state through the control input pin ENABLE. CHT-RHEA offers state-of-the-art digital signal isolation with substantial advantages over opto-couplers such as lower transmission delay, high reliability, lower power consumption, high immunity to d V/dt and operation in extreme temperature conditions. The solution can be used anywhere there is a need to isolate control lines or status/ fault reporting lines in high voltage systems or to municate data in sensing systems. The plete solution is optimized to minimize the size of the transformer, the number of external ponents, the transmission delay (<100ns) and to maximize the noise margin, even in harsh d V/dt conditions (50k V/µs). Features - Operating junction temperature: from -55°C to +225°C - 2 transmit (Tx) and 2 receive (Rx) channels - Data rate up to 2 Mbits/sec per channel - Transmission delay: max 100 ns - Jitter (RMS cycle-2-cycle) : max 21 ns - Power supply: 5V - Low power consumption: 50 m W per...