LTC6561

RECOMMENDED FOR NEW DESIGNS

Four-Channel Multiplexed Transimpedance Amplifier with Output Multiplexing

Data Sheet (Rev. C) Product Selection Table
Part Models
8
1ku List Price
Starting From $4.96
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Part Details

  • 220MHz –3dB Bandwidth with 2pF Input Capacitance
  • Single-Ended Output
  • 74kΩ Transimpedance Gain
  • 4.8pA/√Hz Input Current Noise Density at 200MHz (2pF)
  • 64nARMS Integrated Input Current Noise Over 200MHz (2pF)
  • Linear Input Range 0µA to 30µA
  • Overload Current > ±400mA Peak
  • Fast Overload Recovery 12ns, 1mA 
  • Fast Channel Switchover < 50ns
  • Single 5V Supply
  • 200mW Power Dissipation for 4 Channels
  • 2VP-P Output Swing on 100Ω Load
  • 4mm × 4mm, 24-Lead QFN Package
  • Output MUX Combines Multiple 4-Channel Devices to Create 4, 8,12,16, 24, 32 Channel Solutions
  • AEC-Q100 Qualified for Automotive Applications
LTC6561
Four-Channel Multiplexed Transimpedance Amplifier with Output Multiplexing
LTC6561 Application Circuit LTC6561-DICE LTC6561 Performance Graph LTC6561 Pin Configuration
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Documentation

Data Sheet 1

Technical Articles 1

Spec Notice 1

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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LTC6561
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC2900A

LTC6561 | 16 CH: 1 Output Optical Evaluation for LTC6561 Four-Channel Transimpedance Amplifier with Output Multiplexing

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Product Details

Demonstration circuit 2900A is a 16-channel analog LiDAR receiver chain. The LTC6561 is featured; which has 74kΩ transimpedance gain and 30µA linear input current range. Utilizing the LTC6561’s output MUX, four devices are combined to a single output. The LTC6561’s fast overload recovery makes it well suited for LIDAR receivers. The LTC6561 operates from 5V single supply. The LTC6561’s single-ended output can swing 2VP-P on a 100Ω load.

On the DC2900A, the FirstSensor’s 16-channel 400nm to 1100nm wavelength sensitive APD array sensor feeds four LTC6561s for current to voltage conversion and amplification. The APDs are DC coupled to the TIAs inputs to facilitate fast channel switching and output multiplexing. The DC2900A AC-coupled output is intended to demonstrate time domain measurements into 50Ω systems.

eval board
schematic 2
DC2808A

Electrical Evaluation for LTC6561 Four-Channel Transimpedance Amplifier with Output Multiplexing

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Product Details

Demonstration circuit 2808A features the LTC6561 four-channel transimpedance amplifier (TIA) with output multiplexing. The DC2808A accepts voltage pulses and converts them to current for the TIA. The board can also be used to measure bandwidth and channel isolation with a network analyzer. The LTC6561, which features 74KΩ transimpedance gain and 30uA linear input current range, is ideal for LIDAR receivers using Avalanche Photodiodes (APD). The LTC6561 operates from 5V single supply and consumes only 220mW. Utilizing the LTC6561’s output MUX, multiple LTC6561 devices can combine into a single output. The LTC6561’s fast overload recovery makes it well suited for LIDAR receivers. The LTC6561’s single-ended output can swing 2VP-P into a 100Ω load.

The LTC6561 is packaged in a compact 4mm × 4mm 24-pin leadless QFN package with an exposed pad for thermal management and low inductance.
DC2900A
LTC6561 | 16 CH: 1 Output Optical Evaluation for LTC6561 Four-Channel Transimpedance Amplifier with Output Multiplexing
DC2900A
DC2808A
Electrical Evaluation for LTC6561 Four-Channel Transimpedance Amplifier with Output Multiplexing
DC2808A

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Macro SPICE model for LTC6561 or LTC6560
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