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Home » NEWEST Products » New by Manufacturer » Texas Instruments » E-Meter Winning Solution - Texas Instruments
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TI Winning Solution

Texas Instruments E-Meter Winning Solution

TI Winning Solutions

Texas Instruments E-Meter Solution

Check out this E-Meter Solution from Texas Instruments that is a cost-efficient smart meter design providing advanced functionality with more memory (Flash, RAM) and communication options for a value-line solution for mid-range smart utility metering. This TI winning solution allows designers to overcome the compromise of functionality versus cost. These TI devices along with TI's industry-leading innovations in metrology and wireless connectivity give designers affordable options for engineering a smarter global energy grid. This E-Meter Solution features:

MSP430F6736 - Smart Meter SoC Eval Module
TPS5432 - Switching Regulator
ISO7131 - Digital Isolator
UCC28710 - PWM Controller
CC1200 - RF Transceiver
CC2538 - RF Front End
LM3671 - DC-DC Converter
ISO3082 - RS-485 Transceiver

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Key Solution Features
  • Innovative Smart Meter SoC integrates both analog front ends to measure energy, processing power and communication ports to implement application and connectivity functions.
    • The MSP430F6736 metrology system-on-chip includes three high-performance 24-bit sigma-delta A/D converters, to support single-phase with anti-tamper meter implementations.
  • New to the industry is TI's powerful RF system-on-chip for 2.4-GHz IEEE 802.15.4, 6LoWPAN and ZigBee® applications perfect for smart e-meters.
    • It combines a powerful ARM Cortex M3-based MCU system with up to 32K on-chip RAM and up to 512 K on-chip flash with a robust IEEE 802.15.4 radio.
  • The cost-effective high-efficiency, synchronous switching regulator that can provide better than 90% efficiency at light loads.
    • It provides accurate regulation for a variety of loads across temperature and features several capabilities including adjustable slow start and cycle by cycle current limiting.
  • The small-footprint and low-power 2/1 Triple Channel Digital Isolator with Noise Filter, is a perfect companion to the common subsystems in a smart meter.
    • These low-power isolators provide up to 2500 Vrms galvanic isolation for 1 minute per UL and 4242 Vpk per VDE, and are capable of handling speeds of up to 50 Mbps.

An Example E-Meter Solution
An Example E-Meter Solution

Texas Instruments EVM430-F6736 Eval Module

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EVM430-F6736 Eval Module

Texas Instruments EVM430-F6736 is a single-phase electricity meter evaluation module based on the MSP430F6736 device. The E-meter can be connected to the main power lines and has inputs for voltage and current, as well as a third connection to setup anti-tampering. It allows a customer to test the new MSP430F673x/F672x series and see the accuracy result, wide dynamic range achieved and ease of calibration. The easy-to-use Energy Library provides metrology software for fast startup with this EVM. The software is also programmable for any user's needs. MSP430F67xx series are microcontroller configurations with three high-performance 24-bit sigma-delta A/D converters, a 10-bit analog-to-digital (A/D) converter, four enhanced universal serial communication interfaces, and more.

  • Run real-time electricity metering applications
  • Connects to any test system or AC voltage
  • Several power supply options
  • Easy viewing of results and calibration
  • Metrology software provided
Texas Instruments TPS5432 Synchronous Step Down Converter

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TPS5432 Synchronous Step Down Converter

Texas Instruments TPS5432 synchronous step down converter is a 6V, 3A, low Iq, current mode, synchronous monolithic buck converter with integrated MOSFETs. TI TPS5432 implements current mode control to reduce external component count and features 700kHz switching frequency. TPS5432 synchronous step down converter provides accurate regulation for a variety of loads with an accurate 3.0% voltage reference over temperature. Integrated 70mΩ MOSFETs and 360µA typical supply current maximize efficiency. This TI device is ideal for use in consumer applications such as DTV, step top boxes, LCD displays, and CPE. TPS5432EVM-116 evaluation module helps designers evaluate the performance of the TPS5432.

  • Two 70mΩ (typical) MOSFETs for 3A Continuous Output Current
  • Current Mode Control With External Compensation
  • 700kHz Switching Frequency
  • 360µA no Load Quiescent Operating Current (no switching)
  • 0.808V Internal Voltage Reference
  • ±2.0% Reference Accuracy at 25°C
  • ±3.0% Reference Accuracy Over Temperature Range (-40°C~125°C)
  • Stable Operation With Ceramic Output Capacitor
  • Adjustable Slow Start
  • Cycle by Cycle Current Limit, and Frequency Fold Back Protection
  • Consumer Applications such as DTV, Set Top Boxes, LCD displays, CPE
  • Low-Voltage Point-of-Load Regulations for SoC, CPU, DSP
Texas Instruments ISO7131 2/1 Triple Channel Digital Isolator

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ISO7131 2/1 Triple Channel Digital Isolator

Texas Instruments ISO7131 2/1 Triple Channel Digital Isolator provides galvanic isolation up to 2500 VRMS for 1 minute per UL and 4242 VPK per VDE. ISO7131 has three channels with two forward and one reverse-direction channels. ISO7140 and ISO7141 are quad-channel isolators; ISO7140 has four forward, ISO7141 has three forward and one reverse-direction channels. These devices are capable of 50 Mbps maximum data rate with 5V supplies and 40Mbps maximum data rate with 3.3V or 2.7V supplies, with integrated filters on the inputs for noise-prone applications. The suffix F indicates that default output state is low; otherwise, the default output state is high. Each isolation channel has a logic input and output buffer separated by a silicon dioxide (SiO2) insulation barrier. Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry. The devices have TTL input thresholds and can operate from 2.7 V, 3.3 V, and 5 V supplies. All inputs are 5V tolerant when supplied from a 2.7V or 3.3V supply.

  • Maximum Signaling Rate: 50 Mbps (with 5V Supplies)
  • Robust Design With Integrated Noise Filter
  • Default Output Low Option (Suffix F)
  • Low Power Consumption, Typical ICC per Channel (with 3.3 V Supplies):
    • ISO7131: 1.5 mA at 1 Mbps, 2.6 mA at 25 Mbps
  • Low Propagation Delay: 23 ns Typical (3.3 V Supplies)
  • Wide Temperature Range: -40°C to 125°C
  • 50 kV/µs Transient Immunity, Typical
  • Long Life with SiO2 Isolation Barrier
  • Operates From 2.7 V, 3.3 V and 5 V Supply and Logic Levels
Application Circuit
Application Circuit
Texas Instruments UCC28710 PWM Controller

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WE-UNIT Off-Line Transformers
WE-FB Flyback Transformers

UCC28710 PWM Controller

Texas Instruments UCC28710 PWM Controller provides isolated-output Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. TI UCC28710 processes information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. An internal 700V start-up switch, dynamically-controlled operating states, and a tailored modulation profile support ultra-low standby power without sacrificing start-up time or output transient response. Control algorithms in the UCC28710 family allow operating efficiencies to meet or exceed applicable standards.

  • <10mW No-Load Power
  • Primary-Side Regulation (PSR) Eliminates Opto-Coupler
  • ±5% Voltage and Current Regulation Across Line and Load
  • 700V Start-Up Switch
  • 100kHz Maximum Switching Frequency Enables High-Power Density Charger Designs
  • Quasi-Resonant Valley-Switching Operation for Highest Overall Efficiency
  • Frequency Jitter to Ease EMI Compliance
  • Wide VDD Range Allows Small Bias Capacitor
  • Clamped Gate-Drive Output for MOSFET
  • Overvoltage, Low-Line, and Overcurrent Protection Functions
  • Programmable Cable Compensation
Application Circuit
Application Circuit
Texas Instruments CC1200 RF Transceiver and Tools

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CC1200 sub-1GHz Single-Chip Transceiver

Texas Instruments CC1200 sub-1GHz is a fully integrated single-chip radio transceiver designed for high performance at very low power and low voltage operation in cost effective wireless systems. All filters are integrated, removing the need for costly external SAW and IF filters. This TI device is mainly intended for the ISM (Industrial, Scientific and Medical) and SRD (Short Range Device) frequency bands at 164-190MHz, 410-475MHz, and 820-950MHz. Evaluation module kits and a development kit are available for easy assessment of this TI RF transceiver.

  • High performance single chip transceiver
    • Excellent receiver sensitivity:
      • 123dBm at 1.2 kbps
      • 110dBm at 50 kbps
    • Blocking performance: 86dB at 10MHz
    • Adjacent channel selectivity: up to 60dB at 12.5kHz offset
    • Very low phase noise: -114dBc/Hz at 10kHz offset (169MHz)
  • Programmable output power up to +16dBm with 0.4dB step size
  • Automatic output power ramping
  • Supported modulation formats: 2-FSK, 2-GFSK, 4-FSK, 4-GFSK, MSK, OOK
  • Supports up to 1.25 Mbps data rate in transmit and receive
  • Low current consumption:
    • Enhanced Wake-On-Radio functionality for automatic low-power receive polling
    • Power down: 0.3µA (0.5µA with sleep timer active)
      • RX: 2mA in RX Sniff Mode
      • RX: 19mA peak current in low power mode
      • RX: 23mA peak current in high performance mode
      • TX: 46mA at +14dBm
  • Low power, high performance, wireless systems with up to 1250kbit/s data rate
  • 169/433/868/915/920 MHz ISM/SRD bands
  • Possible support for additional frequency bands: 137-158.3, 205-237.5, and 274-316.6MHz
  • Smart Metering (AMR/AMI)
  • Home and building automation
  • Wireless alarm and security systems
  • Industrial monitoring and control
  • Wireless healthcare applications
  • Wireless sensor networks and Active RFID
  • IEEE 802.15.4g applications
  • Wireless M-Bus, all modes

Block Diagram

Block Diagram

CC2538 System-On-Chip

Texas Instruments CC2538 System-On-Chip is the ideal SoC for high-performance ZigBee applications. It combines a powerful ARM Cortex M3-based MCU system with up to 32K on-chip RAM and up to 512 K on-chip flash with a robust IEEE 802.15.4 radio. This enables it to handle complex network stacks with security, demanding applications, and over-the-air download. Thirty-two GPIOs and serial peripherals enable simple connections to the rest of the board. The powerful security accelerators enable quick and efficient authentication and encryption while leaving the CPU free to handle application tasks. The low-power modes with retention enable quick startup from sleep and minimum energy spent to perform periodic tasks.

  • Microcontroller
    • Powerful ARM Cortex M3 With Code Prefetch
    • Up to 32 MHz Clock Speed
    • 512kB, 256kB, or 128kB In-System-Programmable Flash
    • Supports On-Chip Over-the-Air Upgrade (OTA)
    • Supports Dual ZigBee Application Profiles
    • Up to 32kB RAM (16kB With Retention in All Power Modes)
    • cJTAG and JTAG Debugging
  • RF
    • 2.4-GHz IEEE 802.15.4 Compliant RF Transceiver
    • Excellent Receiver Sensitivity of -97dBm
    • Robustness to Interference With ACR of 44dB
    • Programmable Output Power Up to 7dBm
    • Security Hardware Acceleration
    • Future Proof AES-128/256, SHA2 Hardware Encryption Engine
    • Optional - ECC-128/256, RSA Hardware Acceleration Engine for Secure Key Exchange
    • Radio Command Strobe Processor and Packet Handling Processor for Low-Level MAC Functionality
  • Low Power
    • Active-Mode RX (CPU Idle): 20mA
    • Active-Mode TX at 0 dBm (CPU Idle): 24mA
    • Power Mode 1 (4µs Wake-Up, 32kB RAM retention, full register retention): 0.6mA
    • Power Mode 2 (Sleep Timer Running, 16kB RAM Retention, Configuration Register Retention): 1.3µA
  • Smart Gird and Home Area Network
  • Home and Building Automation
  • Intelligent Lighting Systems
  • Internet of Things
Texas Instruments LM3671 Step-Down DC-DC Converter

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LM3671 Step-Down DC-DC Converter

Texas Instruments LM3671 2MHz, 600mA step-down DC-DC converter is optimized for powering low voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.7V to 5.5V. This TI device provides up to 600mA load current, over the entire input voltage range. There are several different fixed voltage output options available as well as an adjustable output voltage version range from 1.1V to 3.3V. The device offers superior features and performance for mobile phones and similar portable systems. Automatic intelligent switching between PWM low-noise and PFM low-current mode offers improved system control. During PWM mode, the device operates at a fixed-frequency of 2MHz. Hysteretic PFM mode extends the battery life by reducing the quiescent current to 16µA during light load and standby operation. Internal synchronous rectification provides high efficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01µA.

  • 16µA Typical Quiescent Current
  • 600mA Maximum Load Capability
  • 2MHz PWM Fixed Switching Frequency (typ.)
  • Automatic PFM/PWM Mode Switching
  • Internal Synchronous Rectification for High Efficiency
  • Internal Soft Start
  • 0.01µA Typical Shutdown Current
  • Operates from a Single Li-Ion Cell Battery
  • Only Three Tiny Surface-Mount External Components Required (One Inductor, Two Ceramic Capacitors)
  • Current Overload and Thermal Shutdown Protection
  • Available in Fixed Output Voltages and Adjustable Version
  • LM3671Q is an Automotive Grade Product that is AEC-Q100 Grade 1 Qualified
  • Mobile Phones
  • Portable Instruments
  • Automotive

Application Circuit

Texas Instruments LM3671 Step-Down DC-DC Converter Application Circuit
Texas Instruments ISO3082 Isolated Half-Duplex Differential Line Transceiver

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ISO3082 Isolated Half-Duplex Differential Line Transceiver

Texas Instruments ISO3082 is an isolated half-duplex differential line transceiver for TIA/EIA 485/422 applications. This TI device is ideal for long transmission lines since the ground loop is broken to allow for a much larger common-mode voltage range. The symmetrical isolation barrier of the device is tested to provide 2500 Vrms of isolation for 60s between the bus-line transceiver and the logic-level interface. Any cabled I/O can be subjected to electrical noise transients from various sources. These noise transients can cause damage to the transceiver and/or near-by sensitive circuitry if they are of sufficient magnitude and duration. These isolated devices can significantly increase protection and reduce the risk of damage to expensive control circuits. ISO3082 is qualified for use from -40°C to 85°C.

  • 4000-VPEAK Isolation, 560-VPEAK VIORM
    • UL 1577, IEC 60747-5-2 (VDE 0884, Rev. 2), IEC 61010-1, IEC 60950-1 and CSA Approved
  • Bus-Pin ESD Protection
    • 12kV HBM Between Bus Pins and GND2
    • 6kV HBM Between Bus Pins and GND1
  • 1/8 Unit Load - Up to 256 Nodes on a Bus
  • Meets or Exceeds TIA/EIA RS-485 Requirements
  • Signaling Rates up to 20Mbps
  • Thermal Shutdown Protection
  • Low Bus Capacitance - 16pF (Typ)
  • 50kV/µs Typical Transient Immunity
  • Fail-safe Receiver for Bus Open, Short, Idle
  • 3.3V Inputs are 5V Tolerant
  • Security Systems
  • Factory Automation
  • Motor/Motion Control

Functional Diagram
Texas Instruments ISO3082 Application Circuit
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