LMH32404IRHFR

Overview

The LMH32404IRHFR is a four-channel, single-ended-input to differential-output transimpedance amplifier designed for LIDAR and laser distance measurement systems. It features an integrated multiplexer allowing flexible configurability between optical sensors and ADCs or TDCs. Key electrical parameters include a small-signal bandwidth of 350 MHz, a slew rate of 750 V/µs, and a typical quiescent current of 27.7 mA per channel. The device operates on a supply voltage ranging from 3 V to 3.45 V and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Integrated ambient light cancellation circuitry replaces AC coupling to save board space and system cost.
• Built-in 100-mA protection clamp on each channel ensures rapid recovery from overloaded input conditions.
• Internal multiplexer enables channel switching with a transition time of 10 ns.
• Supports low-power standby modes to conserve energy when amplifiers are not in use.

Applications

• Mechanically scanning LIDAR
• Solid-state scanning LIDAR
• Laser distance meter
• Safety area scanner

Procurement Notes

Verify the specific ordering suffix IRHFR corresponds to the 28-pin VQFN package configuration required for your design. Confirm that the component meets RoHS standards as indicated in the manufacturer's documentation. Ensure compatibility with the recommended operating conditions, specifically the supply voltage limits and thermal management requirements for the target application environment.

Selection Notes

Select this component for applications requiring high-speed signal processing with multiple sensor inputs. The integrated multiplexer simplifies routing by reducing the number of output pins needed compared to discrete solutions. Consider the power consumption profiles, including standby and low-power modes, if energy efficiency is a critical design constraint for the final product.

Part Context

This device belongs to the LMH32404 series of transimpedance amplifiers manufactured by Texas Instruments. It is part of a family of high-speed analog components optimized for optical sensing applications. The series includes variations such as bare die options, providing flexibility for different packaging and integration needs within advanced electronic systems.

Replacement Considerations

Public confirmed substitute part numbers: None identified in official documentation.

FAQ

How does the device handle ambient light interference?

The LMH32404 includes an integrated ambient light cancellation (ALC) loop on each channel, which can be enabled to cancel DC offset caused by ambient light without requiring external AC coupling capacitors.

What is the maximum input current the device can withstand?

Each channel features an integrated 100-mA protection clamp that protects the amplifier and allows it to recover rapidly from overload conditions up to this current limit.