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ADI ADM1293-1AACPZ Digital Power Monitor With PMbus Interface

Shenzhen Mingjiada Electronics Co., Ltd. as a global well-known electronic components distributor, specialising in the supply of ADI high-precision digital power supply monitor ADM1293-1AACPZ. This integrated PMBus interface power supply monitor is designed for modern electronic systems, which can accurately measure the current, voltage and power parameters, and is widely used in the field of telecommunication equipment, servers, industrial control systems and other fields.

Product Description Of ADM1293-1AACPZ

ADM1293-1AACPZ is high accuracy integrated digital power monitors that offer digital current, voltage, and power monitoring using an on-chip, 12-bit analog-to-digital converter (ADC), communicated through a PMBus™ compliant I2C interface.

ADM1293-1AACPZ devices acquire the current by measuring the voltage difference across the external sense resistor. This voltage is amplified and digitized by an internal 12-bit ADC. The same ADC can also sample the primary input voltage and an auxiliary input voltage. The internal digital block can perform multiplication of the current and primary input voltage for power calculation. The ADM1293-1AACPZ also feature a power accumulator for energy metering. An industry-standard PMBus interface allows a master controller to read back these data from the device. The master controller can then combine this information with a known sense resistor value to calculate the current, voltage, power, and energy consumption over time on the monitored rail.

Specification Of ADM1293-1AACPZ

Product:Power Monitors

Sensing Method:High Side

Supply Voltage - Max:20 V

Supply Voltage - Min:2.95 V

Operating Supply Current:3.3 mA

Accuracy:0.33 %

Minimum Operating Temperature:- 40 C

Maximum Operating Temperature:+ 105 C

Feature Of ADM1293-1AACPZ

ADM1293-1AACPZ digital power monitor has a series of excellent technical parameters, making it stand out in the field of power management. The device is available in a compact LFCSP-16 package for space-constrained application scenarios, while maintaining excellent thermal and electrical performance.

Accuracy performance is one of the ADM1293-1AACPZ's proudest features. Over the entire industrial temperature range of -40°C to +125°C, the device is able to maintain a measurement accuracy of 0.33% with a detection voltage of ±20mV, a mark that far exceeds that of many comparable products. Its low detection voltage characteristics (down to ±20mV) allow systems to use smaller detection resistors, which reduces power loss and improves overall efficiency. The device's gain error is a maximum of only ±0.1%, gain error drift as low as ±25ppm/°C, and common-mode rejection ratio of up to 140dB (min), which together ensure stable, accurate measurements in a variety of environmental conditions.

ADM1293-1AACPZ supports a wide common-mode voltage range (0V to 20V), a feature that allows it to flexibly adapt to a variety of circuit topologies. The device provides equally accurate measurements for both high-end and low-end current sensing. In addition, it has a bi-directional current detection capability that measures forward and reverse currents, a feature that is particularly important in applications such as battery charge/discharge management and motor control.

In terms of dynamic response, the ADM1293-1AACPZ excels. Its fast alarm response time of only 75μs enables it to quickly notify the host controller when a power supply anomaly occurs, providing timely protection for the system. The device's integrated digital filters program the conversion time and average value, allowing the user to strike the optimal balance between measurement speed and noise rejection according to application requirements.

The communication interface of the ADM1293-1AACPZ is based on the industry-standard PMBus protocol (I²C-compatible) and operates up to 2.94MHz, supporting high-speed data transfer. The device provides 16 selectable pin configuration addresses, facilitating the connection of multiple monitoring devices on the same bus without address conflicts. This design is particularly suitable for complex systems that need to monitor multiple power supplies, such as server motherboards and communication devices.

In terms of power management, the ADM1293-1AACPZ itself exhibits high efficiency characteristics. It is powered by a single 2.7V to 5.5V supply with a typical operating current of only 640μA and a maximum shutdown current of no more than 5μA, making it ideal for power-sensitive application scenarios. The device also integrates an internal temperature sensor with an accuracy of ±1°C (at 25°C), which allows for simultaneous monitoring of the ambient temperature and provides an additional layer of protection for the system.

Applications Of ADM1293-1AACPZ

Power monitoring/power budgeting

Central office equipment

Telecommunications and data communications equipment

PCs/servers