LMH32404 Series
Four-channel differential-output transimpedance amplifier with integrated multiplexing
Manufacturer: Texas Instruments
Catalog
Four-channel differential-output transimpedance amplifier with integrated multiplexing
Key Features
• Gain: 20 kΩPerformance, CPD= 1 pF:Bandwidth: 350 MHzInput-referred noise: 56 nARMSRise, fall time: 1.25 nsQuiescent current: 28 mA/channelStandby mode: 10 mA/channelLow power mode: 2.5 mA (4 channels)Channel switching time: 10 nsIntegrated ambient light cancellationIntegrated 100-mA protection clamp4 Input channels and 4 differential output channelsIntegrated multiplexer enables flexible configurability between optical sensor and ADC/TDCMultiple LMH32404s can be combined in parallel to create a wider field-of-view (FoV)Package: 28-pin VQFNBare dieTemperature range: –40°C to +125°CGain: 20 kΩPerformance, CPD= 1 pF:Bandwidth: 350 MHzInput-referred noise: 56 nARMSRise, fall time: 1.25 nsQuiescent current: 28 mA/channelStandby mode: 10 mA/channelLow power mode: 2.5 mA (4 channels)Channel switching time: 10 nsIntegrated ambient light cancellationIntegrated 100-mA protection clamp4 Input channels and 4 differential output channelsIntegrated multiplexer enables flexible configurability between optical sensor and ADC/TDCMultiple LMH32404s can be combined in parallel to create a wider field-of-view (FoV)Package: 28-pin VQFNBare dieTemperature range: –40°C to +125°C
Description
AI
The LMH32404 is a quad-channel, single-ended-input to differential-output transimpedance amplifier (TIA) for light detection and ranging (LIDAR) applications and laser distance measurement systems.
The LMH32404 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 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 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 10 ns. The LMH32404 can be placed in low-power mode using theENpin to conserve power when the amplifier is not being used.
.
The LMH32404 is a quad-channel, single-ended-input to differential-output transimpedance amplifier (TIA) for light detection and ranging (LIDAR) applications and laser distance measurement systems.
The LMH32404 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 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 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 10 ns. The LMH32404 can be placed in low-power mode using theENpin to conserve power when the amplifier is not being used.
.
