Supervisory Circuits feature non-volatile fault memory.
Press Release Summary:
Integrating signal as well as threshold and fault monitoring, MAX16031/MAX16032 EEPROM-based system monitors feature A/D converter, dual interface, and 1 internal and 2 external temperature sensors. They monitor 1 high-side current, 3 temperatures, and 8 voltages with 1% accuracy, while also simultaneously measuring, converting, and comparing signals to user-programmable thresholds, enabling control and protection of sensitive components in closed-loop system.
Original Press Release:
EEPROM-Configurable System Monitors Have NV Fault Registers and Ensure Highest Reliability
o The MAX16031/MAX16032 are EEPROM-based system monitors with nonvolatile fault memory.
o The devices allow the customer to efficiently identify and analyze board failures, thus ensuring product reliability and increasing system productivity in the event of board returns.
o On-board EEPROM lets the customer set various thresholds and fault outputs for greater applications flexibility. The on-board EEPROM also lets the user log fault data internally in the MAX16031/MAX16032.
o The main application of these monitors is high-end systems like servers, telecom, and networking equipment where a large number of voltage rails exist in a single system.
SUNNYVALE, CA-November 1, 2007-Maxim Integrated Products (Pink Sheets: MXIM) introduces the MAX16031/MAX16032, EEPROM-based system monitors with nonvolatile fault memory. The devices' integrated signal monitoring, threshold and fault monitoring, high-accuracy analog-to-digital converter (ADC), and flexible dual interface allow the customer both to react to, and to address stray system signals more efficiently than was possible before. These many capabilities, therefore, ensure product reliability and significantly increase overall system productivity. The parts also help identify the cause of board failures, in the event of board returns.
As system requirements and ASICs are constantly changing, it is difficult to predict the exact values required in a new design. Therefore, devices with on-board EEPROM configurability like the MAX16031/MAX16032 allow designers to adjust values to their changing system requirements without requiring more components and inventory.
The principal application for the MAX16031/MAX16032 is high-end systems where a large number of voltage rails exist in a single system. Specific applications include servers, telecom, and networking equipment.
Customers' Traditional Demands
As ASICs, FPGAs and high-end systems increase in complexity, customers increasingly demand more highly integrated supervisory products. System controllers and processors now require multiple voltages to support analog and digital blocks, memory, and other key components. Integrating all these features allows systems to control and protect sensitive components in a closed-loop system. But as a result, there are now more voltage channels to monitor. Power consumption is more complex and thermal measurement more critical, and both must be monitored carefully. In short, monitoring all these varying power requirements is critical to the ensured reliability of a system. This was not a task completed easily nor reliably with a single supervisory circuit.
Highly Integrated Monitoring Functions Control and Protect Applications
The MAX16031/MAX16032 monitor one high-side current, three temperatures, and eight voltages with 1% accuracy. The devices not only monitor multiple analog signals, but they simultaneously measure, convert (through the on-board ADC), and compare these signals to the user's programmed thresholds. With all these capabilities integrated into a single supervisory product, users can easily control and protect sensitive components in a closed-loop system.
If an overcurrent condition occurs, the high-side current monitor notifies the system controller of the fault. The system controller can then take immediate action to prevent further damage to the system, which ultimately saves time and money for the user.
Two external and one internal temperature sensors allow the user to monitor two remote board temperatures and the MAX16031/MAX16032's internal die temperature. Such broad temperature monitoring across the system allows for accurate readings, which results in faster response to damaging overtemperature conditions.
The eight voltage inputs can monitor voltages single-ended or pseudo-differentially. These dual-input structure types give the user the option of higher speed or the ability to cancel common-mode DC voltages for higher accuracy. Users thus benefit by decreasing design time when initially selecting performance characteristics.
Programmability Protects Systems and Maximizes Design Flexibility
MAX16031/MAX16032's on-board, user-configurable EEPROM provides faster implementation in system design, which translates to shorter overall development time.
On-board EEPROM allows the user to configure threshold limits, fault output dependencies, GPIO functionality, input operating ranges, and operating modes. The configuration threshold limits allow two undervoltage, two overvoltage, two overcurrent, and two overtemperature thresholds. Given both early warning and critical fault alerts, the customer gains additional time to respond to voltage, current, or temperature deviations from their set values.
Three fault outputs are programmable. Besides a primary active-low RESET output, the user can also configure two additional fault outputs. Thus, the customer has full control over which threshold violations will trigger the fault output to assert. Additionally, the MAX16031/MAX16032 contains user EEPROM for storing miscellaneous data and for logging fault register values.
Versatile Dual Interface Expands System Use Worldwide
Users can communicate with the MAX16031/MAX16032 through either an SMBus(TM)/I2C-compatible interface or a JTAG interface. This flexible interface makes the devices useful in any major international marketplace where reliability, integration, and performance are paramount. This versatility maximizes productivity between departments, offices, or locations that use differing interface technologies.
High Resolution Provides Greater Accuracy
The MAX16031/MAX16032 also integrate a 10-bit, 1% accurate analog-to-digital converter (ADC) that ensures accurate detection of a threshold violation. Three scalable input ranges provide even finer resolution. Faster response time and greater system accuracy are the main customer benefits of this ADC.
Power Directly from Intermediate Bus Voltages Reduces Component Count, Saves Time and Costs
A unique advantage of the MAX16031/MAX16032 is its capability to operate from a 2.85V to 14V range. This wide voltage range answers customers' demand for supervisors that can operate directly from an intermediate bus voltage. Now customers can save time and money by avoiding the need for extra components that divide the bus voltage into a lower operating range.
The MAX16031/MAX16032 operate over a -40°C to +85°C temperature range. This operating range is important to ensure that devices operate reliably in applications where high temperatures are prevalent, such as server racks and networking closets. This part is packaged in a small 7mm x 7mm, 48-pin, TQFN package. Please contact the factory for pricing. For more information please visit: www.maxim-ic.com/MAX16031-Monitor
Copyright © 2007 by Maxim Integrated Products, Dallas Semiconductor
