IS31CG1110-QFLS2

Overview

The IS31CG1110-QFLS2 is a high-performance MIMO/SISO dual-port differential line driver designed for broadband Power Line Communications (PLC) systems. It integrates two pairs of wideband, high-voltage current mode feedback amplifiers operating on a single +10V to +13.2V supply. The device features a fixed voltage gain of 25dB (Av=18 V/V), a 100MHz -3dB closed-loop signal bandwidth, and a maximum output driver capability of 350mA. It supports linear output drive of 16.4V pp-diff into a 34Ω load with a quiescent current of 25mA per port. The component includes internal input common-mode generation, thermal shutdown protection at approximately 165°C, and separate enable/disable control pins for each amplifier pair.

Feature Summary

• Dual-port architecture supporting both Multiple-Input Multiple-Output (MIMO) and Single-Input Single-Output (SISO) configurations via dedicated logic control pins.
• High linearity performance with a Multi-Tone Power Ratio (MTPR) of 50dBc and fast shut down/power up transitions under 1 microsecond.
• Integrated thermal shutdown circuitry that forces the device into shut-down mode when junction temperature reaches approximately 165°C.
• Internal input common-mode voltage generator maximizes dynamic range while reducing external PCB component requirements.

Applications

• Broadband Power Line Communications (PLC)
• Smart Grid applications
• Smart Home networks including IPTV and Security Cameras

Procurement Notes

Verify the specific ordering suffix QFLS2-TR against the manufacturer's latest documentation to confirm package type and reel quantity specifications. Ensure compatibility with the required supply voltage range of +10V to +13.2V during system design validation. Confirm that the 20-pin QFN package dimensions align with the target PCB footprint and thermal management strategy.

Selection Notes

Select this component for designs requiring high-speed differential signaling over power lines with strict linearity constraints. The fixed 25dB gain simplifies circuit design by eliminating the need for external gain-setting resistors. Consider the internal biasing and common-mode generation capabilities if minimizing bill-of-materials count is a priority. Evaluate the thermal resistance characteristics to ensure adequate heat dissipation within the specified ambient temperature range.

Part Context

The IS31CG1110 belongs to Lumissil Microsystems' CG series of connectivity components, specifically engineered for robust analog signal transmission in noisy electrical environments. This part addresses the demand for reliable data communication infrastructure in modern smart grid and home automation ecosystems where existing power wiring serves as the data medium.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.

FAQ

How is the quiescent current adjusted?

The quiescent current can be set using an off-chip resistor connected between the IBIAS pin and ground. Connecting the IBIAS pin directly to ground ensures optimized performance.

What happens if the ENB_AB or ENB_CD pins are left floating?

These logic pins are internally pulled high. Leaving them floating will put the device into shut-down mode.

How does the device handle over-temperature conditions?

The device features built-in thermal shutdown protection that forces it into shut-down mode when the internal junction temperature typically reaches +165°C.