1. Overview:

️· What they are: The ADCMP580, ADCMP581, and ADCMP582 are high-speed comparators designed for applications requiring fast response times and reliable data comparisons. They come in three different output stage configurations.
️· Output Stage Variations:
- ADCMP580: CML (Complementary Metal-Silicon) - Designed for a 50-ohm termination environment.
- ADCMP581: ECL (Emitter Coupled Logic) - Designed for a -2V termination environment.
- ADCMP582: PECL (Positive Emitter Coupled Logic) – Designed for VCCO - 2V termination.
️· Latch Feature: Includes a latch feature that can be enabled or disabled, impacting its operation.

2. Pin Descriptions & Functionality:

Pin Mnemonic	Description	Notes
VTP	Termination Resistor Return for VP Input
VP	Non-inverting Analog Input
VN	Inverting Analog Input
VTN	Termination Resistor Return for VN Input
VCCI	Positive Supply Voltage
LE/LE	Latch Enable Inputs (Complementary) - Active low for latch mode. Control output tracking/latching.	Terminate with 50 ohms (ADCMP580/582), -2V (ADCMP581) via VTT.
VTT	Termination Return Pin for LE/LE inputs. Connection dependent on output stage.	VTT is connected to GND (ADCMP580), –2V (ADCMP581), VCCO–2V (ADCMP582).
GND/VCCO	Digital Ground/Positive Logic Power. ADCMP580/581 = GND, ADCMP582 = VCCO.
Q	Inverting Output (Low when VP > VN)
Q	Non-inverting Output (High when VP > VN)
VEE	Negative Power Supply
HYS	Hysteresis Control (connect to VEE with resistor for hysteresis)
GND	Analog Ground

3. Key Application Considerations/Design Tips:

️· Power/Ground Layout: *Critical* for high-speed performance. Use low-impedance supply planes and adequate bypassing. Use multiple, close-to-the-pin, high-quality bypass capacitors.
️· Output Stage Termination: Each output stage requires specific termination for optimal performance.
- CML (ADCMP580): 50-ohm termination.
- ECL (ADCMP581): -2V termination.
- PECL (ADCMP582): VCCO - 2V termination.
️· Latch Feature:
- Can be enabled/disabled.
- Disabled by connecting LE/LE to appropriate voltage (GND, VEE, etc.) with a resistor.

4. Key Performance Characteristics (Based on Figures Provided):

️· Propagation Delay: Varies with input overdrive and common-mode voltage; temperature dependent.
️· Rise/Fall Time: Temperature dependent.
️· Input Bias Current: Temperature and input differential voltage dependent.
️· Input Offset Voltages: Temperature dependent.
️· Output Levels: Temperature dependent.

5. Figures (Brief Description):

️· Figure 5: Propagation Delay vs. Input Overdrive.
️· Figure 6: Propagation Delay vs. Input Common Mode.
️· Figure 7: Propagation Delay vs. Temperature.
️· Figure 8: Rise/Fall Time vs. Temperature.
️· Figure 9: Hysteresis vs. R_HYS Control Resistor.
️· Figure 10: Input Bias Current vs. Input Differential.
️· Figure 11: Input Bias Current vs. Temperature.
️· Figure 12: Input Offset Voltages vs. Temperature.
️· Figure 13: Output Levels vs. Temperature.
️· Figure 14: Simplified Schematic ADCMP580 CML output.
️· Figure 15: Simplified Schematic ADCMP581/582 ECL/PECL output.



IMPORTANT DISCLAIMERS:

️· This is a partial datasheet excerpt. It does not contain all the information needed for proper design and use. Refer to the full datasheet for complete specifications, absolute maximum ratings, detailed electrical characteristics, timing diagrams, and other crucial data.
️· Application-Specific Considerations: This excerpt provides general guidance. The actual design will depend on the specific application requirements, system architecture, and component selection.
️· No Warranty: The information provided is for reference only and does not constitute a warranty of any kind. The user assumes all responsibility for the proper use of these components.
️· Revisions: Datasheets are subject to change. Always use the most recent version available from the manufacturer.
️· Safety Precautions: Always observe proper safety precautions when working with electrical components.