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ACOMP01 - Fast Analog Comparator Module

The ACOMP01 module is a high-speed dual comparator board with differential LVDS outputs. It is designed for fast signal discrimination in nanosecond-scale timing systems. Each comparator features coaxial MCX input connectors and differential output for integration into high-speed digital acquisition or timing logic circuits.

ACOMP01 top view ACOMP01 bottom view

Typical Applications

  • High-speed pulse discrimination
  • Oscilloscope triggering
  • LIDAR and ToF sensing
  • Nuclear and particle physics detectors
  • Time interval measurement systems

Features

  • Two independent comparator channels
  • High-speed response with sub-nanosecond propagation delay
  • Differential LVDS outputs
  • MCX connectors for analog input signals
  • Designed for precise pulse timing and triggering

Comparators Used

TLV3604

  • Propagation delay: 800 ps
  • Toggle rate: up to 3 Gbps
  • Input common-mode range: extends 200 mV beyond rails
  • LVDS output with 350 mV typical differential swing
  • Supply voltage: 2.4 V to 5.5 V
  • Mounted as IC1【9†tlv3604.pdf】

LMH7220

  • Propagation delay: 2.9 ns
  • Input voltage range extends 200 mV below ground
  • LVDS output designed for 100 Ω differential load
  • Supply voltage: 2.7 V to 12 V
  • Mounted as IC2【8†lmh7220.pdf】

Connectors

Power Supply (J1)

  • Onboard filtering capacitors: 10 µF, 1 µF, and 100 nF
  • 5.6 V Zener diode for optional input voltage clamping and reverse voltage protection

The module uses (2.4 V to 5.5 V) for the two comparators. Ensure proper voltages are applied as per the comparator requirements.

Inputs

  • J2, J3: Inputs for TLV3604 (IN+, IN-)
  • J4, J5: Inputs for LMH7220 (IN+, IN-)

All inputs are via MCX connectors with ground-referenced shielding.

Outputs

  • J6: LVDS differential output from TLV3604 (TLV_OUT+, TLV_OUT-)
  • J7: LVDS differential output from LMH7220 (LMH_OUT+, LMH_OUT-)

Each output is routed to a standard 3-pin header: OUT+, GND, OUT-

Notes

DNF (Do Not Fit) resistors R1 and R2 are placeholders for optional output termination.