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LMH32401-Q1

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

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Data sheet

LMH32401-Q1

ACTIVE
Data sheet Order now

Product details

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
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
VQFN (RGT) 16 9 mm² 3 x 3
  • 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

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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* Data sheet LMH32401-Q1 Automotive, 450-MHz, Programmable-Gain, Differential-Output Transimpedance Amplifier datasheet (Rev. A) PDF | HTML 01 Aug 2023

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Evaluation board

LMH32401RGTEVM — LMH32401 evaluation model for programmable-gain differential-output transimpedance amplifier

The LMH32401RGT evaluation module (EVM) is a development platform for the LMH32401 differential-output transimpedance ampifier in the RGT package. The EVM features a transformer to convert the output to a 50-Ω single-ended connection for easy measurement with standard test equipement, and the (...)

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LMH32401 and LMH32401-Q1 TINA-TI Reference Design (Rev. C)

SBOMB18C.TSC (9729 KB) - TINA-TI Reference Design
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Simulation model

LMH32401 and LMH32401-Q1 TINA-TI Spice Model

SBOMB23.TSM (19 KB) - TINA-TI Spice Model
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TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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