AM26LV31CDR

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The AM26LV31CDR is a low voltage differential signal (LVDS) line driver, receiver, and transceiver circuit. It is a versatile device for driving and receiving a wide range of LVDS signals over short distances. The device can be used in LVDS data buses, such as Raspberry Pi, Serial ATA (SATA), PCI Express, and USB 3.0. This application note describes the AM26LV31CDR application field and its working principle.

LVDS Signals

LVDS stands for "low voltage differential signaling". Low voltage differential signaling (LVDS) is a type of electrical signaling which is widely adopted in the digital communication of modern computing systems. LVDS signaling is used to transport digital data over distances up to 10 feet (3 meters) or more. It uses differential signaling and voltages close to 0 V to reduce the power loss across long distances. LVDS is typically used to transfer data between integrated circuits in a serial fashion, and it is commonly used in LCD displays, ATA/SATA hard drives, and computer networks.

AM26LV31CDR Application

The AM26LV31CDR is a high-performance, low-power, small-form-factor device for line drivers, receivers, and transceivers for use with low voltage differential signaling (LVDS). It is a versatile solution for LVDS data buses, such as Raspberry Pi, Serial ATA (SATA), PCI Express, and USB 3.0. The AM26LV31CDR also features integrated diagnostic functions, such as fail indication, control, and warning. The device can be configured as a line driver, line receiver, or transceiver, and it is designed to drive and receive high-speed data over short line lengths.

Working Principle of AM26LV31CDR

The AM26LV31CDR is designed to drive and receive LVDS data. It is a 3-driver, 2-receiver line interface IC with level shift circuits to allow it to operate at interface voltages from 1.8 V to 5.5 V. It also has an adjustable termination impedance from 24 Ω (DTIF=2) to 84 Ω (DTIF=4). It also has loss of signal (LOS) detection, differential pair swap (DPS), loop-back mode, and other features.

The AM26LV31CDR has three independent line drivers, two differential line receivers, and two current-programmable receivers. The line drivers and receivers feature adjustable voltage levels, hysteresis and pin-compatible operating options for +1.8V, +2.5V, and +3.3V logic levels. It also has configurable slew rate of up to 8 ns, and can support data rates up to 3.125 Gb/s. The device also incorporates integrated fail-safe, fail-hold, and fail-open diagnostics.

In terms of power consumption, the AM26LV31CDR has a maximum operating current of just 2.9 mA while only consuming 620 µW at 500 kHz. It also has a low-power sleep mode of 1 µA. The device also features ESD protection on all pins, and has a robust thermal temperature monitoring capability.

Conclusion

The AM26LV31CDR is an ideal solution for LVDS-enabled data buses, such as Raspberry Pi, Serial ATA (SATA), PCI Express, and USB 3.0. It is a 3-driver, 2-receiver line interface IC with adjustable termination impedance, loss of signal detection, and diagnostic features. The device can be configured as a line driver, line receiver, or transceiver, and it has a low power consumption and adjustable voltage levels. The device also features integrated fail-safe, fail-hold, and fail-open diagnostics, and robust thermal and ESD protection.

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