The **ADM1176-1ARMZ-R7** is an integrated Hot Swap Controller and Digital Power Monitor produced by Analog Devices. It is designed to allow boards to be safely inserted and removed from a live backplane while providing precise telemetry via an I2C interface. --- ### ## Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 3.15 V to 16.5 V | | **Interface** | I2C (SMBus compatible) | | **ADC Resolution** | 12-bit | | **Package** | 10-lead MSOP | | **Operating Temperature** | -40°C to +85°C | | **Current Sensing** | High-side via external sense resistor | --- ### ### Core Functional Blocks 1. **Hot Swap Controller**: * Controls an external N-channel MOSFET to regulate the current flow during power-up. * Prevents high "inrush" currents that could damage components or cause voltage sags on the backplane. * Features a programmable electronic circuit breaker. 2. **Digital Power Monitoring**: * Contains an internal **12-bit ADC**. * Measures both the current (via the voltage drop across the sense resistor) and the supply voltage on the VCC pin. * Data is stored in internal registers accessible via I2C. 3. **Alert/Interrupt Pin**: * Includes an **ALERT** output that can trigger an interrupt to the micro-controller if a fault (like overcurrent) occurs or if a conversion is complete. --- ### ### Typical Application Circuit Components To use the ADM1176, several external electronic parts are required: * **External N-Channel MOSFET**: Acts as the "gatekeeper" for the power path. * **Sense Resistor ($R_{SENSE}$)**: A low-value precision resistor used to measure current. * **Timing Capacitor ($C_{TIMER}$)**: Sets the duration for which the device allows an overcurrent state before tripping the circuit breaker. * **Pull-up Resistors**: Required for the SDA and SCL lines of the I2C bus. --- ### ### Part Number Breakdown (ADM1176-1ARMZ-R7) * **ADM1176**: Base model number. * **-1**: Internal address variant (defines the I2C address). * **ARMZ**: Package type (MSOP) and RoHS compliance (Z). * **-R7**: Shipping format (7-inch Tape and Reel, 1000 units).