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.