HMC914LP4ETR

Overview

The HMC914LP4ETR is a single-channel limiting amplifier designed for data transmission rates up to 12.5 Gbps. It operates from a single +3.3V supply with a typical current of 47 mA. The device provides a differential small signal gain of 32 dB and a 3-dB bandwidth of 9.5 GHz. It features an adjustable output voltage swing ranging from 240 mVp-p to 750 mVp-p, controlled via the VAC pin. Integrated functions include programmable loss-of-signal detection, automatic output disable mode, DC offset correction, and an analog RSSI output.

Feature Summary

• Supports high-speed data transmission up to 12.5 Gbps with constant-level differential output swing.
• Features programmable loss-of-signal detection with adjustable threshold levels via external resistor or internal setting.
• Includes automatic output disable mode that activates when input signals fall below the programmed loss threshold.
• Provides an analog received signal strength indicator (RSSI) output proportional to input signal amplitude.

Applications

• SONET/SDH-based transmission systems
• OC-192 fiber optic modules
• 10 Gigabit Ethernet interfaces
• 8x and 10x Fiber Channel applications

Procurement Notes

Verify the specific suffix 'ETR' against official Analog Devices documentation to confirm reel packaging specifications, as datasheets primarily reference the LP4E package type. Confirm RoHS compliance status and ensure the component matches the QFN-24 footprint dimensions. Check for any recent product discontinuance notices or lifecycle changes affecting availability.

Selection Notes

Select this component for applications requiring precise signal conditioning at data rates up to 12.5 Gbps. The integrated loss-of-signal feature simplifies system monitoring without external logic. Ensure the design accommodates the 3.3V supply requirement and utilizes the VAC pin for optimal output swing adjustment based on link budget requirements.

Part Context

The HMC914LP4E belongs to the HMC914 series of limiting amplifiers manufactured by Analog Devices. It is housed in a 24-lead plastic 4x4mm SMT package. The device is part of the broader portfolio of RF and microwave integrated circuits designed for high-performance optical and wireless communication infrastructure.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.

FAQ

How is the loss-of-signal threshold level configured?

The threshold can be set internally by leaving the LOSTH pin floating (63 mVp-p single-ended) or adjusted externally using a resistor connected between the LOSTH pin and VCC or GND.

What is the function of the AODWNENB pin?

The AODWNENB pin enables the automatic output disable feature. When asserted low, it forces the outputs to disable if the input signal drops below the programmed loss threshold.

Can the HMC914LP4ETR operate with single-ended inputs?

Yes, all single-ended input signals are terminated with 50 ohms to +3.3V on-chip and may be either AC or DC coupled.