LTC6561
Info : RECOMMENDED FOR NEW DESIGNS
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LTC6561

Four-Channel Multiplexed Transimpedance Amplifier with Output Multiplexing

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 8
1ku List Price Starting From $4.96
Features
  • 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
Additional Details
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The LTC6561 is a low-noise four-channel, transimpedance amplifier (TIA)with 220MHz bandwidth. The LTC6561 multi-channel transimpedance amplifier’s low noise, high transimpedance, and low power dissipation are ideal for LIDAR receivers using Avalanche Photodiodes (APDs). The amplifier features 74kΩ transimpedance gain and 30µA linear input current range. Using an APD input circuit with a total capacitance of 2pF, the input current noise density is 4.5pA/√Hz at 200MHz. With lower capacitance, noise and bandwidth improve further. Only a 5V single supply is needed and the device consumes only 200mW. Utilizing the internal 4-to-1 MUX along with the LTC6561’s output MUX; multiple 4-channel LTC6561 devices can be combined to directly interface with 8, 12, 16 and 32-channel APD arrays. The LTC6561’s fast overload recovery and fast channel switchover make it well suited for LIDAR receivers with multiple APDs. Its single-ended output can swing 2VP-P on a 100Ω load. While its low impedance op amp-style output can drive back-terminated 50Ω cables.

The LTC6561 is packaged in a compact 4mm × 4mm 24-pin leadless QFN package with an exposed pad for thermal management and low inductance.

Applications

  • LIDAR Receiver
  • Industrial Imaging
Part Models 8
1ku List Price Starting From $4.96

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Documentation

Documentation

Video

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC6561DICE
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LTC6561DWF
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LTC6561HUF#PBF
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LTC6561HUF#TRPBF
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LTC6561HUF#WPBF
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LTC6561HUF#WTRPBF
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LTC6561IUF#PBF
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LTC6561IUF#TRPBF
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

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DC2900A

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

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DC2900A

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

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

Product Detail

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.

Resources

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DC2808A

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

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DC2808A

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

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

Product Detail

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.

Tools & Simulations

Tools & Simulations 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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