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.

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.