Features and Benefits
- 600MHz –3dB Bandwidth with 0.5pF Input Capacitance
- Differential Output with Up to 2VP-P Swing into 100Ω Differential Load
- Built-In High-Speed ADC Driver with Output MUX
- Selectable 22.2/16.7/11.1/5.55kΩ Transimpedance Gain
- 1.8pA/3.7pA√Hz Input Current Noise Density 100MHz/600MHz (0.5pF)
- 65nARMS Integrated Input-Referred Current Noise Over 600MHz (0.5pF)
- Large Linear Input Current Range 0μA to 90μA
- Large Transient Overload Current >1A Peak
- Fast Overload Recovery: 2.5ns
- Fast Channel Switching: 10ns
- Power Dissipation: 194mW to 325mW on 3.3V, Varies with Output Mode (13mW in Shutdown)
- Output MUX allows multiple LTC6563s to Create 8, 12, 16 … 32 Channel Solutions
- 3mm × 5mm, 24-Lead QFN Package, Wettable Flanks
- AECQ-100 Grade 1 Qualified (Pending)
The LTC6563 is a low-noise four-channel transimpedance amplifier (TIA) with 600MHz bandwidth. The LTC6563 TIA’s low noise, wide linear range, and low power dissipation are ideal for LIDAR receivers using Avalanche photodiodes (APDs) and photodiodes (PDs). The amplifier features selectable 22.2/16.7/11.1/5.55kΩ Transimpedance gain (RT) and 90μA linear input current range. Using an APD with a total input capacitance of 0.5pF, the input current noise density is 1.8pA/√Hz at 100MHz and 3.7pA/√Hz at 600MHz. The LTC6563 consumes between 194mW and 325mW on a 3.3V supply depending on output mode. An internal 4-to-1 MUX simplifies the system design. In addition, external multiplexing capability allows channel expansion up to 64 channels, saving space and power. Fast overload recovery and fast channel switchover make the LTC6563 well suited for LIDAR receivers with multiple APDs. The built-in high-speed differential ADC driver can swing as much as 2VP-P while driving into 100Ω external differential load.
The LTC6563 is packaged in a 3mm × 5mm 24-pin exposed pad QFN package with wettable flanks.
- Automotive LIDAR Receiver
- Industrial LIDAR Receiver
Markets and Technologies
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Demonstration circuit EVAL-LTC6563-TQFN features the LTC6563 four-channel transimpedance amplifier (TIA) with output multiplexing. This demo kit, EVAL-LTC6563TQFN-EZKIT shipped along with the SDP-K1 controller board, has 4 installed single APD’s which allows optical testing of the TIA functionality. Electrical testing using an external lab pulse generator, as the input current pulse, is also possible with small board modifications.
With its 20kΩ transimpedance gain and 90μA linear input current range, the LTC6563 is ideal for LIDAR receivers using Avalanche Photodiodes (APD). The LTC6563 operates from 3.3V single supply and consumes only 194mW (depending on output mode) for 4 channels. Utilizing the LTC6563’s output MUX, multiple LTC6563 devices can be combined to a single output. The LTC6563’s fast overload recovery makes it well-suited for LIDAR receivers. The LTC6563’s differential output can swing 2VP-P into a 100Ω load, ideal for driving a high-speed ADC directly.
The LTC6563 is packaged in a compact 3mm × 5mm 24-pin leadless QFN package with an exposed pad for thermal management and low inductance.
The EVAL-LTC6563-TQFN utilizes four installed 400-1100nm APD sensors feeding the LTC6563 for current-to-voltage conversion and amplification. The APDs are DC-coupled to the TIAs to facilitate fast output multiplexing and channel switching. Alternatively, with small board modifications, it is possible to electrically excite the LTC6563 using a lab generator tied to SMA connectors provided on the board and voltage-to-current resistors on the board. The EVAL-LTC6563-TQFN is intended to demonstrate time-domain measurements into 50Ω systems.
Tools & Simulations
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Technical Articles (1)
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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