## Overview of the ADCMP602 The **ADCMP602** is a high-speed comparator fabricated on Analog Devices’ proprietary XFCB2 process. It is specifically designed to provide high-performance signal processing with exceptionally low propagation delay and low jitter. --- ### 1. Key Technical Specifications The following table highlights the critical electronic parameters of the ADCMP602: | Parameter | Specification | | :--- | :--- | | **Propagation Delay** | 3.5 ns (typical) | | **Supply Voltage** | 2.5 V to 5.5 V | | **Logic Output** | LVDS (Low Voltage Differential Signaling) | | **Input Common-Mode Range** | -0.2 V to VCC + 0.2 V | | **Power Consumption** | 8 mA (typical at 3.3V) | | **Packaging** | 8-lead MSOP or LFCSP | --- ### 2. Functional Electronic Components The ADCMP602 architecture consists of several specialized stages: #### A. Input Stage The input stage is designed for versatility. It features high input impedance and supports a wide common-mode range that extends slightly beyond the supply rails. This makes it ideal for ground-sensing or rail-to-rail applications. #### B. Latch Function (LE/HYS Pin) This part includes a latch enable input. When the **LE** pin is driven high, the output is held at its current state regardless of changes at the input. This is critical for data synchronization in high-speed timing circuits. #### C. LVDS Output Driver Unlike standard TTL or CMOS comparators, the ADCMP602 utilizes **LVDS** logic. * **Reduced EMI:** Low voltage swings minimize electromagnetic interference. * **Speed:** Differential signaling allows for high toggle rates (up to 800 Mbps). * **Power Efficiency:** Constant current switching reduces power spikes during transitions. --- ### 3. Application Circuits To integrate the ADCMP602 effectively, consider the following electronic design requirements: * **Bypassing:** Use 0.1 µF ceramic capacitors in parallel with 10 µF tantalum capacitors located as close to the $V_{CC}$ pin as possible. * **Termination:** Since it uses LVDS, a **100 $\Omega$ termination resistor** must be placed across the differential output pair at the receiver end to prevent signal reflections. * **Hysteresis:** Internal hysteresis is provided to prevent output oscillations caused by noise on slow-moving input signals. --- ### 4. Comparison with Related Parts | Feature | ADCMP600 | ADCMP601 | ADCMP602 | | :--- | :--- | :--- | :--- | | **Output Type** | CMOS/TTL | CMOS/TTL | **LVDS** | | **Package** | SC70-5 | SC70-6 | MSOP-8 | | **Latch Pin** | No | Yes | **Yes** |