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TI's New Micro With Integrated Low-Leakage Transimpedance Amplifier

The MSP430FR2311 Microcontroller Includes a Selectable Amplifier Configuration

The new MSP430FR2311 microcontroller from Texas Instruments can extend battery life in sensing and measurement applications, the industry's only MCU with an integrated low-leakage transimpedance amplifier (TIA) consuming just 50pA of current. The new microcontroller - an expansion of the ultra-low-power MSP430™ MCU family - offers 20 times lower leakage than alternative voltage and current sensing solutions and provides the configurability of analog and memory technology without sacrificing battery life or board space.

Highly integrated MCU solution with configurable analog helps developers simplify their schematics and save PCB space by up to 75 percent. The MSP430FR2311 MCU allows developers to connect to a wide range of sensors with its analog integration including ADC, op amp, comparators and TIA. This solution also integrates Ferroelectric Random Access Memory (FRAM) technology and eliminates the need for an onboard crystal in a single 3.5 mm x 4 mm package. This single chip solution will reduce design complexity and overall project development time.

The MSP430FR2311 MCU allows developers to choose the amplifier configuration (non-inverting, inverting or transimpedance) they need and scale their application by selecting the amount of memory to be allocated for application code or data, eliminating the boundaries of Flash to RAM ratios. Customers can get started in minutes using the MSP430FR2311 MCU LaunchPad™ development kit supported by Code Composer Studio™ integrated development environment (IDE) and IAR Embedded WorkBench®. Customers can then explore an application implementation with the MSP430FR2311 smoke sensing sub-system reference design (coming in 2Q16) using a photodiode and TIA configuration for current sensing. Additionally, customers developing for medical health and fitness, building automation and personal electronics can further extend battery life by utilizing this TI Design reference design (TIDA-00242) which uses a TI energy harvesting IC (bq25570) in an MSP430FR2311 MCU-based system.

Current MSP430G2x MCU customers using 2KB and 4KB devices can easily migrate their designs to the MSP430FR2311 MCU and take advantage of higher performance with non-volatile FRAM and higher analog integration, including operational amplifiers, ADCs and comparators. Review the MSP430F2xx and MSP430G2xx series migration guide to learn how to easily move between families when needing more analog capability.

Features of the MSP430FR2311 Microcontroller

  • Embedded Microcontroller
    • 16-Bit RISC Architecture up to 16 MHz
    • Wide Supply Voltage Range From 3.6 V Down to 1.8 V
  • Optimized Low-Power Modes (at 3 V)
    • Active Mode: 126 µA/MHz
    • Standby: Real-Time Clock (RTC) Counter: 0.71 µA
    • Shutdown (LPM4.5): 32 nA Without SVS
  • High-Performance Analog
    • Transimpedance Amplifier
      • Current-to-Voltage Conversion
      • Half-Rail Input
      • Low-Leakage Negative Input Down to 5 pA
      • Rail-to-Rail Output
      • Multiple Input Selections
      • Configurable High-Power and Low-Power Modes
    • 8-Channel 10-Bit Analog-to-Digital Converter
      • Internal 1.5-V Reference
      • Sample-and-Hold 200 ksps Enhanced Comparator
      • Integrated 6-Bit Digital-to-Analog Converter as Reference Voltage
      • Programmable Hysteresis
      • Configurable High-Power and Low-Power Modes
    • Smart Analog Combo
      • Supports General-Purpose Op Amp
      • Rail-to-Rail Input and Output
      • Multiple Input Selections
      • Configurable High-Power and Low-Power Modes
  • Low-Power Ferroelectric RAM
    • Up to 3.75KB of Nonvolatile Memory
    • Built-In Error Correction Code
    • Configurable Write Protection
    • Unified Memory of Program, Constants, and Storage
    • 1015 Write Cycle Endurance
    • Radiation Resistant and Nonmagnetic
  • Intelligent Digital Peripherals
    • IR Modulation Logic
    • Two 16-Bit Timers With Three Capture/Compare Registers Each
    • One 16-Bit Counter-Only RTC Counter
    • 16-Bit Cyclic Redundancy Checker
  • Enhanced Serial Communications
    • Enhanced USCI A Supports UART, IrDA, and SPI
    • Enhanced USCI B Supports SPI and I²C With Support for New Remap Feature
  • Clock System
    • On-Chip 32-kHz RC Oscillator
    • On-Chip 16-MHz Digitally Controlled Oscillator With Frequency Locked Loop
      • ±1% Accuracy With On-Chip Reference at Room Temperature
    • On-Chip Very Low-Frequency 10-kHz Oscillator
    • On-Chip High-Frequency Modulation Oscillator
    • External 32-kHz Crystal Oscillator
    • External High-Frequency Crystal Oscillator up to 16 MHz
    • Programmable MCLK Prescalar of 1 to 128
    • SMCLK Derived From MCLK With Programmable Prescalar of 1, 2, 4, or 8
  • SMCLK Derived From MCLK With Programmable Prescalar of 1, 2, 4, or 8
    • 16 I/Os on 20-Pin Package
    • 12 Interrupt Pins Can Wake MCU From LPMs
    • All I/Os are Capacitive Touch I/Os

More information on the MSP430FR2311 Microcontroller, can be found on the TI website at TI MSP430FR2311 product page

The Texas Instruments website address is www.ti.com
[Reprinted with kind permission from Texas Instruments]