ADIADM1191-2ARMZ-R7
Overview
The ADM1191-2ARMZ-R7 is a digital power monitor and current sense amplifier that provides digital current and voltage monitoring via an I2C interface. It operates over a wide input voltage range from 3.15V to 26V, making it suitable for high-side rail monitoring in various computing and industrial platforms. The device includes an internal 12-bit ADC that converts current and voltage measurements for system-level power management.
Why Choose This Part
The ADM1191 offers a wide 3.15V to 26V operating range, allowing it to monitor various supply rails without additional level-shifting components. Its I2C interface supports up to 16 different slave addresses, enabling multiple monitors on a single bus, while the low 1.7mA typical supply current minimizes the measurement overhead.
Applications
Key Specifications
Getting Started
To evaluate this part, use a standard I2C master such as an MCU or an FPGA to poll the internal 12-bit ADC registers. Connect a low-side precision sense resistor to the SENSE+ and SENSE- pins, ensuring the trace routing follows Kelvin sensing principles for accurate current measurement. Reference the Analog Devices EVAL-ADM1191EBZ evaluation board for recommended PCB layout and decoupling capacitor placement.
