CISSOID CHT-TIT4750G-CSOIC28-T

Product Info

General 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 complete 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 coming 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 dV/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 communicate data in sensing systems. The complete solution is optimized to minimize the size of the transformer, the number of external components, the transmission delay (<100ns) and to maximize the noise margin, even in harsh dV/dt conditions (50kV/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 mW per channel (1 MHz NRZ input signal)

Hysteresis on digital input for noise immunity

Isolation: 10 MO @2500V

High common mode transient immunity: 50KV/µS

ENABLE control signal on both TX and RX functions

On-Off Keying modulation

Programmable modulation frequency (to manage EMC requirements of specific applications)

Modulation polarity change by configuration

Validated at 225°C for 10000 hours (and still on-going)

Package: CSOIC28

Applications

Isolated gate drive for IGBT, MOSFET, JFET and SiC Transistors

Isolated sensor interfaces

Galvanic isolation of A-D converters

Galvanic isolation of standard RS-232 / RS-422 / RS-485 / I2C transmission links

Industrial field bus isolation

Industrial power inverters

Motor drives and battery management in EV / HEV