LTC491IN#PBF

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LTC491IN#PBF Application Field and Working Principle

LTC491IN#PBF are high speed, low power CMOS differential to single-ended line driver and receiver ICs for interfacing between two nodes of a differential communication network. The LTC491IN#PBF is part of the LTC491IN series of devices which include line drivers and receivers for RS-485, RS-422, and MIL-STD-188 applications.

The LTC491IN#PBF is designed to provide reliable differential signal transmission at speeds up to 12 Mbps while consuming only 3.5 mA of current. The chip incorporates a differential receiver and differential line driver with continuous slew rate control, and can be used to interface to digital logic such as microprocessors and FPGAs.

Application Field

The LTC491IN#PBF family is suitable for various applications, including RS-485, RS-422, and MIL-STD-188 standards. It can also be used as a CAN, SENT, or ARINC 429 transceiver. In addition, it is also suitable for serial communication links in industrial and automotive applications.

The versatile nature of the LTC491IN#PBF allows for a wide range of applications, from 4-wire controllers for controlling motors, actuators, and valves to communication links for inter-processor communication in embedded systems.

Working Principle

The LTC491IN#PBF is a differential line driver/receiver IC designed to interface between two nodes of a digital communication network. It operates on a single supply voltage, ranging from 4.5 V to 12 V, and is compatible with digital logic families including TTL, CMOS, and LVPECL. The signal inputs are differential and the signal outputs are either voltage-mode differential or single-ended signal.

The LTC491IN#PBF line driver and receiver ICs incorporate an innovative slew-rate controlled line driver which enables the signal to propagate at up to 12 Mbps over long or short cables. The driver can be configured to drive either a differential output or single-ended signal. The receiver incorporates a hysteresis threshold of 2.25 mV, which ensures good signal integrity for a wide range of conditions.

The IC also includes a driver enable pin which is used to disable the driver output when the device is not transmitting. This allows the device to consume a fraction of the power when the transmission is not active. The receiver has a wide common-mode range which covers voltages from GND to the power supply rail.

Conclusion

The LTC491IN#PBF family of devices is an excellent choice for a variety of differential communication applications. Its low power consumption, high speed, and differential input and output make it a great option for interfacing between two nodes of a digital communication network. The device is suitable for RS-485, RS-422, and MIL-STD-188 applications, and can be used as a CAN, SENT, or ARINC 429 transceiver.

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