Product details

Number of channels (#) 4 GBW (Typ) (MHz) 350 Total supply voltage (Max) (+5V=5, +/-5V=10) 3.45 Total supply voltage (Min) (+5V=5, +/-5V=10) 3 Vos (offset voltage @ 25 C) (Max) (mV) 20 Rail-to-rail No Features Integrated TIA BW @ Acl (MHz) 350 Operating temperature range (C) -40 to 125
Number of channels (#) 4 GBW (Typ) (MHz) 350 Total supply voltage (Max) (+5V=5, +/-5V=10) 3.45 Total supply voltage (Min) (+5V=5, +/-5V=10) 3 Vos (offset voltage @ 25 C) (Max) (mV) 20 Rail-to-rail No Features Integrated TIA BW @ Acl (MHz) 350 Operating temperature range (C) -40 to 125
VQFN (RHF) 28 20 mm² 5 x 4
  • AEC-Q100 qualified for Automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Gain: 20 kΩ
  • Performance, CPD = 1 pF:
    • Bandwidth: 350 MHz
    • Input-Referred Noise: 56 nARMS
    • Rise, Fall Time: 1.25 ns
  • Quiescent Current: 28 mA/channel
  • Standby Mode: 10 mA/channel
  • Low Power Mode: 2.5 mA (4 channels)
  • Channel Switching Time: 10 ns
  • Integrated Ambient Light Cancellation
  • Integrated 100-mA Protection Clamp
  • 4 Input Channels and 4 Differential Output Channels
  • Integrated Multiplexer Enables Flexible Configurability Between Optical Sensor and ADC/TDC
  • Multiple LMH32404s can be Combined in Parallel to Create a Wider Field-of-View (FoV)
  • AEC-Q100 qualified for Automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Gain: 20 kΩ
  • Performance, CPD = 1 pF:
    • Bandwidth: 350 MHz
    • Input-Referred Noise: 56 nARMS
    • Rise, Fall Time: 1.25 ns
  • Quiescent Current: 28 mA/channel
  • Standby Mode: 10 mA/channel
  • Low Power Mode: 2.5 mA (4 channels)
  • Channel Switching Time: 10 ns
  • Integrated Ambient Light Cancellation
  • Integrated 100-mA Protection Clamp
  • 4 Input Channels and 4 Differential Output Channels
  • Integrated Multiplexer Enables Flexible Configurability Between Optical Sensor and ADC/TDC
  • Multiple LMH32404s can be Combined in Parallel to Create a Wider Field-of-View (FoV)

The LMH32404-Q1 is a quad-channel, single-ended input-to-differential output transimpedance amplifier for light detection and ranging (LIDAR) applications and laser distance measurement systems.

The LMH32404-Q1 has an integrated 100-mA clamp on each channel that protects the amplifier and allows the device to recover rapidly from an overloaded input condition. The LMH32404-Q1 also features an integrated ambient light cancellation (ALC) circuit on each channel that can be used instead of AC coupling between the photodiode and the amplifier to save board space and system cost. The ALC loop should be disabled when DC and low frequency content is measured.

Each LMH32404-Q1 channel has integrated switches on the output to disconnect the differential output amplifier from the output pins and put the channel in standby mode. When switching between different channels, the transistion time is only a few nanoseconds. The LMH32404-Q1 can be placed in low-power mode using the EN pin to conserve power when the amplifier is not being used.

The LMH32404-Q1 is a quad-channel, single-ended input-to-differential output transimpedance amplifier for light detection and ranging (LIDAR) applications and laser distance measurement systems.

The LMH32404-Q1 has an integrated 100-mA clamp on each channel that protects the amplifier and allows the device to recover rapidly from an overloaded input condition. The LMH32404-Q1 also features an integrated ambient light cancellation (ALC) circuit on each channel that can be used instead of AC coupling between the photodiode and the amplifier to save board space and system cost. The ALC loop should be disabled when DC and low frequency content is measured.

Each LMH32404-Q1 channel has integrated switches on the output to disconnect the differential output amplifier from the output pins and put the channel in standby mode. When switching between different channels, the transistion time is only a few nanoseconds. The LMH32404-Q1 can be placed in low-power mode using the EN pin to conserve power when the amplifier is not being used.

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Technical documentation

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Type Title Date
* Data sheet LMH32404-Q1 Four-Channel, Differential Output, Multiplexed Transimpedance Amplifier With Integrated Clamping and Ambient Light Cancellation datasheet 17 Dec 2020
Application note How to Increase the Channel Density of LiDAR Systems with the 4-Channel LMH32404 07 May 2021
User guide LMH32404RHFEVM User's Guide 08 Dec 2020
Technical article What you need to know about transimpedance amplifiers – part 1 06 May 2016

Design & development

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Evaluation board

LMH32404RHFEVM — 250-MHz, quad-channel, differential output transimpedance amplifier evaluation module

The LMH32404RHFEVM is an evaluation module (EVM) for the LMH32404RHF differential output transimpedance amplifier. The EVM features a transformer to convert the output to a 50-Ω single-ended connection for easy measurement with standard test equipment, and the option to convert to (...)
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PSpice Circuit Containing LMH32404 Model

SBOMBK6.ZIP (39 KB) - PSpice Model
Simulation model

LMH32404-Q1 PSpice Model

SBOMBR0.ZIP (39 KB) - PSpice Model
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VQFN (RHF) 28 View options

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