MAX31343
±5ppm, I2C Real-Time Clock with Integrated MEMS Oscillator
Show MoreIndustry's Lowest Power MEMS-Based Temperature-Compensated RTC Reduces Crystal Mechanical Failure Susceptibility
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- Highly Accurate RTC with Integrated MEMS Resonator Completely Manages All Timekeeping Functions
- Complete Clock Calendar Functionality Including Seconds, Minutes, Hours, Day, Date, Month, Year, and Century with Leap-Year Compensation Up to Year 2199
- Timekeeping Accuracy ±5ppm (±0.432 second/day) from -40°C to 85°C
- Two Time-of-Day Alarms
- Temperature-Compensated Programmable Square-Wave Output
- Uncompensated Programmable Clock Outputs
- Automatically Switch over to Backup Battery or Supercapacitor on Power-Fail
- Digital Temperature Sensor with ±3°C Accuracy
- +1.6V to +5.5V Supply Voltage
- 64-Byte RAM for User Data Storage
- Simple Serial Interface Connects to Most Microcontrollers
- I2C Interface
- Battery-Backup Input for Continuous Timekeeping
- Low-Power Operation Extends Battery-Backup Runtime
- Operating Temperature Range: -40°C to 85°C
- 2.1mm x 2.3mm, 8-Pin WLP Package
- 4mm x 3mm, 8-Pin TDFN Package
- Underwriters Laboratories® (UL) Recognized
The MAX31343 is a low-cost, extremely accurate, I2C real-time clock (RTC). The device incorporates a battery input and maintains accurate timekeeping when main power to the device is interrupted. The integration of the microelectromechanical systems (MEMS) resonator enhances the long-term accuracy of the device and eliminates the external crystal requirement in the system. The MAX31343 is available in the 8-pin WLP and TDFN packages.
The RTC maintains seconds, minutes, hours, day, date, month, year, and century information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year up to year 2199. The clock operates in the 24-hour format. Other features including two programmable time-of-day alarms, interrupt output, uncompensated programmable clock output, and temperature-compensated programmable square-wave output. Address and data are transferred serially through an I2C bidirectional bus. A voltage reference and comparator circuit monitors the status of VCC to detect power failures and automatically switch to the backup supply when necessary. See the Typical Application Circuit for more details.
Applications
- Action Cameras
- Communications
- Handheld Instrumentation
- Industrial
- Power Meters
- Wearables
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MAX31343
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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
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MAX31343EKA+ | 8-CSP_BGA-2.27X2.27X0.80 |
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MAX31343EKA+T | 8-CSP_BGA-2.27X2.27X0.80 |
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MAX31343ETAY+ | 8-LFCSP_SS-4X4X0.75 |
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MAX31343ETAY+T | 8-LFCSP_SS-4X4X0.75 |
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- MAX31343EKA+
- Pin/Package Drawing
- 8-CSP_BGA-2.27X2.27X0.80
- Documentation
- HTML Material Declaration
- HTML Reliablity Data
- CAD Symbols, Footprints, and 3D Models
- Ultra Librarian
- SamacSys
- MAX31343EKA+T
- Pin/Package Drawing
- 8-CSP_BGA-2.27X2.27X0.80
- Documentation
- HTML Material Declaration
- HTML Reliablity Data
- CAD Symbols, Footprints, and 3D Models
- Ultra Librarian
- SamacSys
- MAX31343ETAY+
- Pin/Package Drawing
- 8-LFCSP_SS-4X4X0.75
- Documentation
- HTML Material Declaration
- HTML Reliablity Data
- CAD Symbols, Footprints, and 3D Models
- Ultra Librarian
- SamacSys
- MAX31343ETAY+T
- Pin/Package Drawing
- 8-LFCSP_SS-4X4X0.75
- Documentation
- HTML Material Declaration
- HTML Reliablity Data
- CAD Symbols, Footprints, and 3D Models
- Ultra Librarian
- SamacSys
Software & Part Ecosystem
Evaluation Kits 2
AD-PQMON-SL
Power Quality Monitor Development Platform
Product Detail
The AD-PQMON-SL provides a complete software and hardware platform for prototyping and evaluating high performance class S polyphase energy quality monitors. The design incorporates the ADE9430 high performance, polyphase energy monitoring IC that has an advanced metrology feature set (total and fundamental active power, volt amperes reactive (VAR), volt amperes (VA), watthour, VAR hour, VA hour, total and fundamental IRMS and VRMS, power factor) and the MAX32650 ultralow power ARM cortex-M4 with FPU-based microcontroller with 3 MB flash and 1 MB SRAM. The ADE9430 enables accurate energy monitoring over a wide dynamic range through its superior analog performance and digital signal processing (DSP) core. The ADE9430 simplifies the implementation and certification of energy and power quality monitoring systems by providing tight integration of acquisition and calculation engines. This solution can be used on a 3-phase system or up to three single-phase systems.
The design also features the MAX32650, which is a part of a new breed of low-power microcontrollers built to thrive in the rapidly evolving Internet of Things (IoT) named DARWIN. These MCUs are smart, with the biggest memories in their class and a massively scalable memory architecture. The MCU exposes all the necessary debug and programming features to enable a complete software development experience with the system. It is coupled with 512 Mb RAM and 64 Mb flash external memories to provide flexibility. The system's firmware is based on ADI's open-source no-OS framework and ADI proprietary ADSW-PQ-CLS library.
The solution has an on-board ADuM6424A Quad-Channel Isolator with Integrated DC-to-DC Converter. This DC-DC converter is used to supply all the components on the high voltage side. The ADUM6424A and the ADUM4152, which is a 5 kV, 7-Channel, SPIsolator™ Digital Isolator for SPI (with 1/2 Aux channel directionality), are used to isolate the connection between the ADE9430 and MAX32650.
The board can be supplied from the AC input through an isolated AC/DC converter or from the USB through the LTC3306, a 1.75 A Synchronous Step-Down Regulator. A logic based on several MAX40203, an Ultra-Tiny nanoPower, 1 A Ideal Diodes with Ultra-Low-Voltage Drop, selects based on availability the supply input with priority to the AC input.
The other 1.1 V and 1.8 V voltage rails needed by the MCU are converted from the 3.3 V input by the ADP225, a Dual, 300 mA Adjustable Output, Quick Output Discharge, Low Noise, High PSRR Voltage Regulator.
For high accuracy time keeping, the MAX31343 ±5 ppm, I2C Real-Time Clock with Integrated MEMS Oscillator is used.
The add-on board includes a standalone interface (a 64 x 4 display, 2 LEDs, and 5 buttons), an SD card for long time data logging, several industrial connectivity ports, and exposes an I/O prototyping area for I2C, SPI, GPIO, UART, 3V3, GND. The prototyping area can be also used for GPS / GNSS (e.g., Accurate Synchrophasor Measurement) or for external control signals.
For industrial connectivity, these are the following possibilities:
- T1L through the ADIN1110, an ultralow power, single port, 10BASE-T1L transceiver design for industrial Ethernet applications
- RS-485 implemented using the ADM2587E, a 2.5 kV Signal and Power Isolated, ±15 kV ESD Protected, Full/Half Duplex RS-485 Transceiver (500 kbps)
- Ethernet
APPLICATIONS
- Energy and power monitoring
- Standards compliant power quality monitoring
- Protective devices
- Smart power distribution units
- Polyphase energy meters
- Intelligent buildings
Resources
MAX31343SHLD
Evaluation Kit for the MAX31343
Product Detail
The MAX31343 shield is a fully assembled and tested PCB to evaluate the MAX31343, low-cost, extremely accurate, real-time clock (RTC) with I2C interface and power management. The shield operates from a single supply, either from USB or external power supply, and the integrated microelectromechanical systems (MEMS) resonator enhances the long-term accuracy and eliminates the external crystal requirement in the system. This device is accessed through an I2C serial interface provided by a MAX32625 PICO board.
The MAX31343 shield provides the hardware and software user interface (GUI) necessary to evaluate the MAX31343. The shield includes a MAX31343EKA+T. It connects to the PC through a MAX32625 PICO board and a micro-USB cable.
Applications
- Action Cameras
- Communications
- Handheld Instrumentation
- Industrial
- Power Meters
- Wearables
Resources