Product
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LMH32401-Q1
  • LMH32401-Q1
  • LMH32401-Q1
  • LMH32401-Q1
  • LMH32401-Q1

LMH32401-Q1

ACTIVE

Automotive, programmable-gain differential-output high-speed transimpedance amplifier

Texas Instruments LMH32401-Q1 Product Info

1 April 2026 0

Parameters

Number of channels

1

GBW (typ) (MHz)

450

Vos (offset voltage at 25°C) (max) (mV)

20

Rail-to-rail

No

Features

Integrated TIA

BW at Acl (MHz)

450

Operating temperature range (°C)

-40 to 125

Rating

Automotive

Package

VQFN (RGT)-16-9 mm² 3 x 3

Features

  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, T A
  • Integrated programmable gain: 2 kΩ or 20 kΩ
  • Performance at gain = 2 kΩ, C PD = 1 pF:
    • Bandwidth: 450 MHz
    • Input-referred noise: 250 nA RMS
    • Rise and fall time: 0.8 ns
  • Performance at gain = 20 kΩ, C PD = 1 pF:
    • Bandwidth: 275 MHz
    • Input-referred noise: 49 nA RMS
    • Rise and fall time: 1.3 ns
  • Integrated ambient light cancellation
  • Integrated 100-mA protection clamp
  • Integrated output multiplexer
  • Wide output swing: 1.5 V PP
  • Quiescent current: 30 mA
  • Package: 16-pin, wettable-flank VQFN
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, T A
  • Integrated programmable gain: 2 kΩ or 20 kΩ
  • Performance at gain = 2 kΩ, C PD = 1 pF:
    • Bandwidth: 450 MHz
    • Input-referred noise: 250 nA RMS
    • Rise and fall time: 0.8 ns
  • Performance at gain = 20 kΩ, C PD = 1 pF:
    • Bandwidth: 275 MHz
    • Input-referred noise: 49 nA RMS
    • Rise and fall time: 1.3 ns
  • Integrated ambient light cancellation
  • Integrated 100-mA protection clamp
  • Integrated output multiplexer
  • Wide output swing: 1.5 V PP
  • Quiescent current: 30 mA
  • Package: 16-pin, wettable-flank VQFN

Description

The LMH32401-Q1 automotive device is a programmable-gain, single-ended-input to differential-output transimpedance amplifier for light detection and ranging (LIDAR) applications.

The LMH32401-Q1 can be configured in a gain of 2 kΩ or 20 kΩ. The LMH32401-Q1 has 1.5 V PP of output swing and is designed to drive a 100‑Ω load.

The LMH32401-Q1 has an integrated 100-mA clamp that protects the amplifier and allows the device to rapidly recover from an overloaded input condition. The LMH32401-Q1 also features an integrated ambient-light cancellation circuit. To save board space, as well as reduce system cost, use this circuit instead of ac coupling between the photodiode (PD) or avalanche photodiode (APD) and the amplifier. The ambient-light cancellation circuit can be disabled in cases where dc coupling is required.

To conserve power when the amplifier is not being used, the LMH32401-Q1 provides a low-power mode using the EN pin. When the amplifier is in low-power mode, the output pins are in a high-impedance state. This feature allows several LMH32401-Q1 amplifiers to be multiplexed to a single ADC with the EN control pin serving as the multiplexer select function.

The LMH32401-Q1 automotive device is a programmable-gain, single-ended-input to differential-output transimpedance amplifier for light detection and ranging (LIDAR) applications.

The LMH32401-Q1 can be configured in a gain of 2 kΩ or 20 kΩ. The LMH32401-Q1 has 1.5 V PP of output swing and is designed to drive a 100‑Ω load.

The LMH32401-Q1 has an integrated 100-mA clamp that protects the amplifier and allows the device to rapidly recover from an overloaded input condition. The LMH32401-Q1 also features an integrated ambient-light cancellation circuit. To save board space, as well as reduce system cost, use this circuit instead of ac coupling between the photodiode (PD) or avalanche photodiode (APD) and the amplifier. The ambient-light cancellation circuit can be disabled in cases where dc coupling is required.

To conserve power when the amplifier is not being used, the LMH32401-Q1 provides a low-power mode using the EN pin. When the amplifier is in low-power mode, the output pins are in a high-impedance state. This feature allows several LMH32401-Q1 amplifiers to be multiplexed to a single ADC with the EN control pin serving as the multiplexer select function.

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