LMH32401 Series

Programmable-gain differential-output high-speed transimpedance amplifier

Catalog

Programmable-gain differential-output high-speed transimpedance amplifier

Part	Mounting Type	Package / Case	Applications	Type	Supplier Device Package	Board Type	-3db Bandwidth	Current - Supply (Main IC)	Amplifier Type	Output Type	Voltage - Supply, Single/Dual (±) [Max]	Voltage - Supply, Single/Dual (±) [Min]	Slew Rate	Current - Output / Channel	Supplied Contents	Utilized IC / Part	Channels per IC
Texas Instruments LMH32401IRGTR	Surface Mount	16-VFQFN Exposed Pad	Optical	Transimpedance Amplifier	16-VQFN (3x3)
Texas Instruments LMH32401YR	Surface Mount	Die	Optical	Transimpedance Amplifier	Diesale
Texas Instruments LMH32401RGTEVM						Fully Populated	500 MHz	29 mA	Transimpedance	Differential	3.45 V	3 V	1.1 V/ns	26.6 mA	Board(s)	LMH32401	1 - Single
Texas Instruments LMH32401IRGTT	Surface Mount	16-VFQFN Exposed Pad	Optical	Transimpedance Amplifier	16-VQFN (3x3)

Catalog

Programmable-gain differential-output high-speed transimpedance amplifier

Key Features

• Integrated programmable gain: 2 kΩ or 20 kΩPerformance, gain = 2 kΩ, CPD= 1 pF:Bandwidth: 450 MHzInput-referred noise: 250 nARMSRise, fall time: 0.8 nsPerformance, gain = 20 kΩ, CPD= 1 pF:Bandwidth: 275 MHzInput-referred noise: 49 nARMSRise, fall time: 1.3 nsIntegrated ambient light cancellationIntegrated 100-mA protection clampIntegrated output multiplexerWide output swing: 1.5 VPPQuiescent current: 30 mAPackages: 16-pin VQFN and bare dieTemperature range: –40 to +125°CIntegrated programmable gain: 2 kΩ or 20 kΩPerformance, gain = 2 kΩ, CPD= 1 pF:Bandwidth: 450 MHzInput-referred noise: 250 nARMSRise, fall time: 0.8 nsPerformance, gain = 20 kΩ, CPD= 1 pF:Bandwidth: 275 MHzInput-referred noise: 49 nARMSRise, fall time: 1.3 nsIntegrated ambient light cancellationIntegrated 100-mA protection clampIntegrated output multiplexerWide output swing: 1.5 VPPQuiescent current: 30 mAPackages: 16-pin VQFN and bare dieTemperature range: –40 to +125°C

Description

The LMH32401 device is a programmable-gain, single-ended, input-to-differential output transimpedance amplifier for light detection and ranging (LIDAR) applications and laser distance measurement systems. The LMH32401 device can be configured in a gain of 2 kΩ or 20 kΩ. The LMH32401 device has 1.5 VPPof output swing and is designed to drive a 100-Ω load. The LMH32401 device has an integrated 100-mA clamp that protects the amplifier and allows the device to recover rapidly from an overloaded input condition. The LMH32401 device also features an integrated ambient light cancellation circuit that can be used instead of AC coupling between the photodiode and the amplifier to save board space in addition to reducing system cost. The ambient light cancellation circuit can be disabled in cases where DC coupling is required. The LMH32401 device can be placed in low-power mode using theENpin to conserve power when the amplifier is not being used. Putting the amplifier in low-power mode places its output pins in a high-impedance state. This feature allows several LMH32401 amplifiers to be multiplexed to a single ADC with theENcontrol pin serving as the multiplexer select function. The LMH32401 device is a programmable-gain, single-ended, input-to-differential output transimpedance amplifier for light detection and ranging (LIDAR) applications and laser distance measurement systems. The LMH32401 device can be configured in a gain of 2 kΩ or 20 kΩ. The LMH32401 device has 1.5 VPPof output swing and is designed to drive a 100-Ω load. The LMH32401 device has an integrated 100-mA clamp that protects the amplifier and allows the device to recover rapidly from an overloaded input condition. The LMH32401 device also features an integrated ambient light cancellation circuit that can be used instead of AC coupling between the photodiode and the amplifier to save board space in addition to reducing system cost. The ambient light cancellation circuit can be disabled in cases where DC coupling is required. The LMH32401 device can be placed in low-power mode using theENpin to conserve power when the amplifier is not being used. Putting the amplifier in low-power mode places its output pins in a high-impedance state. This feature allows several LMH32401 amplifiers to be multiplexed to a single ADC with theENcontrol pin serving as the multiplexer select function.