Analog Devices Inc. LTC6560HUD#TRPBF

Overview

LTC6560HUD#TRPBF from Analog Devices is a single-channel transimpedance amplifier (TIA) optimized for LIDAR receiver front-ends using avalanche photodiodes (APDs). It delivers 74kΩ transimpedance gain, 220MHz –3dB bandwidth (with 2pF input capacitance), 4.8pA/√Hz input current noise density at 200MHz, and linear operation up to 30µA input current - enabling high-sensitivity time-of-flight detection in automotive and industrial LIDAR systems.

For engineers reviewing the LTC6560HUD#TRPBF datasheet, LTC6560HUD#TRPBF pinout, LTC6560HUD#TRPBF application, or LTC6560HUD#TRPBF equivalent, key selection criteria include fast overload recovery (<10ns for 1mA), output multiplexing capability (O_MUX <50ns switching), single 5V supply operation, AEC-Q100 qualification (H-grade), and compact 3mm × 3mm QFN packaging with thermal-exposed pad.

Technical Context

The LTC6560HUD#TRPBF integrates a low-noise TIA stage followed by a voltage gain stage and a low-impedance op-amp-style output buffer capable of 2VP-P swing into 100Ω. Its dual-supply architecture separates VCCI (input stage) and VCCO (output stage), each requiring local 1000pF + 0.1µF bypassing to minimize noise coupling and ensure stability across temperature.

Internal protection circuitry enables survival under ±400mA peak overload currents, while fast recovery (<10ns) and O_MUX-controlled channel isolation (>65dB at 100MHz) support multichannel time-sliced operation. The device supports both DC- and AC-coupled APD interfaces, with performance tradeoffs explicitly quantified for input capacitance (CIN,TOT), pulse stretching, and glitch settling dependent on coupling capacitor value.

Key Specifications

Pinout & Package

The LTC6560HUD#TRPBF is housed in a 3mm × 3mm, 16-pin leadless QFN package with exposed thermal pad (Pin 17 = GND). The package supports low-inductance grounding and efficient heat dissipation required for high-speed, low-noise operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transimpedance amplifier applications.

Compared with MAX40660ATB/VY+ and ADN3010-11-50, the LTC6560HUD#TRPBF uniquely combines automotive qualification, integrated output multiplexing, and optimized low-noise performance for APD-based LIDAR - making it the only drop-in solution for scalable, production-ready time-of-flight systems.

Availability

LTC6560HUD#TRPBF is available at Aetrix Electronics and suitable for automotive LIDAR receivers, industrial time-of-flight imaging systems, and compact APD array signal conditioning requiring stable component supply, AEC-Q100 compliance, and high-volume manufacturability.

Supply support for LTC6560HUD#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC6560HUD#TRPBF belongs to Analog Devices' precision high-speed amplifier product line, specifically engineered for photonics front-ends in LIDAR and optical sensing - emphasizing low noise, fast overload recovery, and robust multiplexing for real-world environmental operation.

FAQ

What is the operating temperature range for the LTC6560HUD#TRPBF?

The LTC6560HUD#TRPBF is rated for –40°C to +125°C operation and qualified to AEC-Q100 Grade H standards. This extended range ensures reliable performance in under-hood automotive environments and industrial settings with high ambient thermal loads. All electrical specifications in the datasheet apply across this full range unless otherwise noted.

Does the LTC6560HUD#TRPBF require separate power supplies for input and output stages?

The LTC6560HUD#TRPBF features dedicated VCCI (input stage) and VCCO (output stage) pins, but they may be tied together to a single 5V supply for simplified implementation. Each supply must be independently bypassed with 1000pF + 0.1µF capacitors to GND. Separating supplies can improve PSRR and reduce inter-stage noise coupling in sensitive designs.

How does the O_MUX pin function in a single LTC6560HUD#TRPBF configuration?

In a standalone LTC6560HUD#TRPBF configuration, asserting O_MUX high disables the output path (isolating IN from OUT), while leaving it low (its default state via internal 29kΩ pull-down) enables normal operation. Disabling does not reduce power consumption but may be used for system-level output blanking or fault isolation.

Can the LTC6560HUD#TRPBF drive a 50Ω coaxial cable directly?

Yes - the OUTTERM pin integrates a 50Ω series resistor, allowing direct connection to back-terminated 50Ω cables without external components. When using the OUT pin instead, a discrete 47.5Ω series resistor is required for proper 50Ω matching. Both configurations support 2VP-P swing into 100Ω or 1VP-P into 50Ω loads.

What is the maximum input capacitance supported for full 220MHz bandwidth?

The 220MHz –3dB bandwidth specification for the LTC6560HUD#TRPBF assumes a total input capacitance (CIN,TOT) of 2pF, including APD junction capacitance, PCB trace capacitance, and parasitics. Bandwidth degrades to ~150MHz at 4pF and ~280MHz at 0.5pF. Layout best practices emphasize minimizing trace length and using ground cutouts to maintain CIN,TOT ≤2pF.