ADM1266ACPZ-R7 datasheet, price

ADM1266ACMZ-R7 Pinout Equivalent Circuit

1：Overview of the ADM1266ACMZ-R7：

ADM1266ACMZ-R7 is a high-precision digital power monitoring and management device introduced by Analog Devices, USA. It is suitable for design scenarios such as data centers, communication infrastructure, or industrial automation. The device offers real-time monitoring, fault diagnosis, and dynamic adjustment of multiple power sources via PMBus/SMBus interfaces, supporting the design of highly reliable power systems. ADM1266ACMZ-R7 features 17 voltage/current monitoring channels, accurately measuring each input/output voltage, current, and power. It is compatible with PMBus v1.3 and SMBus protocols, allowing software configuration of parameters like thresholds and alarm conditions, and provides I²C/SPI compatible interfaces for easy integration with microcontrollers or host systems. Additionally, ADM1266ACMZ-R7 includes overvoltage/undervoltage protection (OVP/UVP), overcurrent protection (OCP), and a wide operating temperature range (-40°C to +125°C) suitable for industrial environments.

2：ADM1266ACMZ-R7 Important pin function definition:

3：Partial circuit diagram of the ADM1266ACMZ-R7component.

（1）In circuit design, connecting an external capacitor between the AVDD_CAP pin and the GND pin can isolate noise from the on-chip power supply, as shown in the diagram below. This capacitor also serves another purpose: when the voltage at the VHx pin is lower than the voltage at the AVDD_CAP pin, the LDO component will immediately shut off, preventing the VHx power from pulling down the AVDD_CAP voltage.It is recommended to use a capacitor with a minimum value of 68µF.

（2）The ADM1266ACMZ-R7 has nine dedicated pins as gpio. Each pin can be configured as input or output as needed. The gpio does not include an internal fault filter and the gpio is default high impedance.

4：Alternative model recommendation

ADM1275 ：

ADM1275 is a hot-swappable controller chip that integrates a 12-bit analog-to-digital converter (ADC), allowing it to read current and voltage through this converter. The ADM1275 protects external FETs by limiting the time the FET remains conductive at maximum current. This current limit time is determined by the capacitor connected to the TIMER pin. Additionally, a foldback resistor network can actively reduce the current limit as the voltage across the FET increases. This helps maintain constant power within the FET and ensures safe operation.

UCD9240：

UCD9240 Is a 4-channel digital power controller launched by Texas Instruments, designed for high-density and high-efficiency power system. It is suitable for data center, server, FPGA / ASIC power supply scenarios, providing dynamic voltage regulation (DVS), accurate load adjustment rate and efficient power distribution. Support PMBus / I²C interface and can use software configuration parameters (e. g. voltage, frequency, protection threshold). It also provides fault logging and black box storage function.

LTC2978：

LTC2978 Is a multi-channel digital power monitoring and management device launched by Analog Devices, designed for high density, high reliability power system. It supports 8-way voltage monitoring, integrated ​PMBus / I²C interface, and is suitable for data center, server, industrial automation and other complex scenarios requiring multi-power rail management, providing dynamic voltage regulation, fault diagnosis and efficient power distribution. LTC2978 Support dynamic voltage regulation (DVS), voltage slope adjustable (Slew Rate Control). The input voltage range is 0.5 V to 32 V, covering most power rail requirements (e. g. POE + +, FPGA power supply).