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LMH34400

ACTIVE

240-MHz, single-ended, transimpedance amplifier with integrated clamp and ambient light cancellation

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Data sheet

LMH34400

ACTIVE
Data sheet Order now

Product details

Number of channels 1 GBW (typ) (MHz) 240 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 3.45 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 3 Vos (offset voltage at 25°C) (max) (mV) 70 Rail-to-rail No Features Integrated TIA BW at Acl (MHz) 240 Operating temperature range (°C) -40 to 125 Rating Catalog
Number of channels 1 GBW (typ) (MHz) 240 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 3.45 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 3 Vos (offset voltage at 25°C) (max) (mV) 70 Rail-to-rail No Features Integrated TIA BW at Acl (MHz) 240 Operating temperature range (°C) -40 to 125 Rating Catalog
SOT-5X3 (DRL) 6 2.56 mm² 1.6 x 1.6
  • Integrated gain: 40 kΩ
  • Performance, C PD = 1 pF:
    • Bandwidth: 240 MHz
    • Input-referred noise: 50 nA RMS
    • Rise, fall time: 1.5 ns
  • Integrated ambient light cancellation
  • Integrated 100-mA protection clamp
  • Quiescent current: 20 mA
  • Low-power mode current: 1.5 mA
  • Temperature range: –40°C to +125°C
  • Integrated gain: 40 kΩ
  • Performance, C PD = 1 pF:
    • Bandwidth: 240 MHz
    • Input-referred noise: 50 nA RMS
    • Rise, fall time: 1.5 ns
  • Integrated ambient light cancellation
  • Integrated 100-mA protection clamp
  • Quiescent current: 20 mA
  • Low-power mode current: 1.5 mA
  • Temperature range: –40°C to +125°C

The LMH34400 is the industries’ smallest, fixed-gain, single-ended transimpedance amplifier for light detection and ranging (LIDAR) applications and laser distance measurement systems. The LMH34400 produces 1.0 V PP of output swing and has an input-referred noise of 50 nA RMS.

The LMH34400 has an integrated 100‑mA clamp that protects the amplifier and allows the device to recover rapidly from an overloaded input condition. The LMH34400 also features an integrated ambient light cancellation (ALC) circuit that can be used instead of ac coupling between the photodiode and the amplifier to save board space and system cost. Disable the ALC loop in cases where the frequency signal content to be measured is less than 400 kHz.

When the amplifier is not being used, the LMH34400 can be placed in low-power mode using the EN pin to conserve power. This feature allows several LMH34400 amplifiers to be multiplexed to the input of the next stage of the receive signal chain with the EN control pin serving as the multiplexer select function. The LMH34400 offers a single-ended output and is optimized for use with time-to-digital converter (TDC) based LIDAR systems.

The LMH34400 is the industries’ smallest, fixed-gain, single-ended transimpedance amplifier for light detection and ranging (LIDAR) applications and laser distance measurement systems. The LMH34400 produces 1.0 V PP of output swing and has an input-referred noise of 50 nA RMS.

The LMH34400 has an integrated 100‑mA clamp that protects the amplifier and allows the device to recover rapidly from an overloaded input condition. The LMH34400 also features an integrated ambient light cancellation (ALC) circuit that can be used instead of ac coupling between the photodiode and the amplifier to save board space and system cost. Disable the ALC loop in cases where the frequency signal content to be measured is less than 400 kHz.

When the amplifier is not being used, the LMH34400 can be placed in low-power mode using the EN pin to conserve power. This feature allows several LMH34400 amplifiers to be multiplexed to the input of the next stage of the receive signal chain with the EN control pin serving as the multiplexer select function. The LMH34400 offers a single-ended output and is optimized for use with time-to-digital converter (TDC) based LIDAR systems.

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Technical documentation

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* Data sheet LMH34400 240-MHz, Single-Ended, Transimpedance Amplifier With Integrated Clamp datasheet (Rev. C) PDF | HTML 31 Aug 2023
Application brief LiFi: TI High-Speed Products for Optical Wireless Communication PDF | HTML 07 Aug 2023
Application brief Time of Flight and LIDAR - Optical Front End Design (Rev. A) PDF | HTML 29 Apr 2022
Certificate LMH34400DRLEVM EU RoHS Declaration of Conformity (DoC) 03 Mar 2022
EVM User's guide LMH34400 Evaluation Module PDF | HTML 04 Feb 2022

Design & development

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Evaluation board

LMH34400DRLEVM — LMH34400 evaluation module for 275-MHz, single-ended output, transimpedance amplifier

The LMH34400DRLEVM is an evaluation module (EVM) for the LMH34400DRL single-ended transimpedance amplifier. The EVM features 50-Ω coaxial input and output connections for easy measurement with standard test equipment, and the option to apply 1-VDC bias to the output from an onboard regulator. The (...)

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LMH34400 PSpice Model

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