## AD8611ARMZ-R2: High-Speed CMOS Comparator The **AD8611ARMZ-R2** is a high-speed comparator manufactured by Analog Devices. It is designed for applications requiring extremely fast signal processing and low power consumption. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Propagation Delay** | 4 ns (extremely fast) | | **Supply Voltage** | 3.0 V to 5.0 V | | **Supply Current** | 4 mA per comparator | | **Input Bias Current** | 5 µA (Max) | | **Output Type** | Rail-to-Rail | | **Package Type** | MSOP-8 (ARMZ denotes MSOP) | | **Operating Temp** | -40°C to +125°C | --- ### 2. Functional Characteristics The AD8611 is a single-channel version (the AD8612 is the dual version). Below are its core functional features: * **Ultra-Fast Response:** With a 4 ns propagation delay, this part is ideal for high-speed clock recovery and data communication. * **Latching Function:** It includes a **latch enable (LE)** pin. When the latch pin is pulled high, the output is held in its current state regardless of changes at the input. * **Rail-to-Rail Outputs:** This ensures the output signal can swing very close to the supply rails, making it compatible with CMOS and TTL logic levels. * **Low Power:** Despite its high speed, it maintains a relatively low power profile compared to older bipolar high-speed comparators. --- ### 3. Pin Configuration (MSOP-8) | Pin No. | Name | Function | | :--- | :---: | :--- | | 1 | **V+** | Positive Supply Voltage | | 2 | **IN+** | Non-Inverting Input | | 3 | **IN-** | Inverting Input | | 4 | **V-** | Negative Supply (Ground) | | 5 | **LE** | Latch Enable | | 6 | **GND** | Ground Reference | | 7 | **Q** | Comparator Output | | 8 | **VCC** | Logic Supply | --- ### 4. Typical Applications 1. **High-Speed Timing:** Used in pulse width modulation (PWM) and pulse position modulation (PPM). 2. **Clock Recovery:** Restoring degraded clock signals in digital communication systems. 3. **Line Receivers:** Converting differential signals into single-ended logic levels over high-speed backplanes. 4. **Threshold Detection:** Fast detection of transient signals in medical or industrial instrumentation. --- ### 5. Part Number Breakdown * **AD8611:** The base model number. * **ARMZ:** Indicates the package style (MSOP) and RoHS compliance (Lead-free). * **R2:** Indicates the packaging format (7-inch Reel, typically 250 units).