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Home » NEWEST Products » New by Manufacturer » Texas Instruments » Texas Instruments Wireless Body Sensor Solution
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Texas Instruments Wireless Body Sensor Solution

Texas Instruments Wireless Body Sensor Solution

TI Winning Solution Texas Instruments Wireless Body Sensor Solution

Check out this wireless body sensor solution from Texas Instruments that delivers a precision sensor interface, a highly integrated Bluetooth® low energy radio, and a micro-power Microcontroller (MCU) that combine to extend battery life and increase system reliability in a small form-factor. This TI Winning Solution is composed of:

CC2541 - 2.4GHz Bluetooth® Low Energy System-on-Chip Solution
TPS62730 - Frequency, Synchronous Step-Down DC-DC Converter
ADS1292 - Low-Power, 2-Ch., 24-Bit Analog Front-End for Biopotential Measurement
MSP430F5308 - Ultra-Low-Power MCU with 16KB Flash, 6KB SRAM

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Key Solution Features

  • Bluetooth® Low Energy radio
  • 50% less board space
  • Step-down converter with bypass mode
  • Works with radio to further reduce power consumption
  • Precision sensor AFE
  • 200 pA Ibias and 335 µW/channel power consumption
  • Micro-power MCU
  • 5 low power modes optimized to extend battery li
A Wireless Body Sensor Solution
A Wireless Body Sensor Solution
Texas Instruments CC2541 2.4GHz Bluetooth® Low Energy and Proprietary System-on-Chip

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Additional Resources

TI CC2541 system-on-chip (SoC) is a power-optimized solution for both low energy and proprietary 2.4GHz applications. CC2541 enables robust network nodes to be built with low total bill-of-material costs. CC2541 SoC combines the excellent performance of a leading RF transceiver with an industry-standard enhanced 8051 MCU, in-system programmable flash memory, 8-KB RAM, and many other powerful supporting features and peripherals. The CC2541 is highly suited for systems where ultralow power consumption is required. This is specified by various operating modes. Short transition times between operating modes further enable low power consumption.
Features

  • RF
    • 2.4GHz low energy Compliant and Proprietary RF System-on-Chip
    • Supports 250kbps, 500kbps, 1Mbps, 2Mbps Data Rates
    • Excellent Link Budget, Enabling Long Range Applications Without External Front End
    • Programmable Output Power up to 0dBm
    • Excellent Receiver Sensitivity (-94dBm at 1Mbps), Selectivity, and Blocking Performance
  • Layout
    • Few External Components
    • Reference Design Provided
    • 6mm × 6mm QFN-40 Package
  • Low Power
    • Active-Mode RX Down to: 17.9mA
    • Active-Mode TX (0 dBm): 18.2mA
    • Power Mode 1 (4-µs Wake-Up): 270µA
    • Power Mode 2 (Sleep Timer On): 1µA
    • Power Mode 3 (External Interrupts): 0.5µA
    • Wide Supply-Voltage Range (2V-3.6V)
  • TPS62730 Compatible Low Power in Active Mode
    • RX Down to: 14.7mA (3V supply)
    • TX (0dBm): 14.3mA (3V supply)
  • Microcontroller
    • High-Performance and Low-Power 8051 Microcontroller Core With Code Prefetch
    • In-System-Programmable Flash, 128- or 256KB
    • 8KB RAM With Retention in All Power Mode

Block Diagram
Block Diagram
Texas Instruments TPS62730 Step Down Converter with Bypass Mode for Ultra Low Power Wireless Applications

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Additional Resources

TI TPS62730 is a high frequency synchronous step down DC-DC converter optimized for ultralow-power wireless applications. TI TPS62730 DC-DC converter is optimized to supply TI low power wireless sub 1GHz and 2.4GHz RF transceivers and System-On-Chip solutions. TI TPS62730 step down converter reduces the current consumption drawn from the battery during TX and RX mode by a highly efficient step down voltage conversion. This TI device provides up to 100mA output current and allows the use of tiny and low-cost chip inductors and capacitors.

Features
  • Input Voltage Range VIN from 1.9V to 3.9V
  • Typ. 30nA Ultra Low Power Bypass Mode
  • Typ. 25µA DC/DC Quiescent Current
  • Internal Feedback Divider Disconnect
  • Typ. 2.1Ω Bypass Switch between VIN and VOUT
  • Automatic Transition from DC/DC to Bypass Mode
  • Up To 3MHz switch frequency
  • Up to 95% DC/DC Efficiency
  • Open Drain Status Output STAT
  • Output Peak Current up to 100mA
  • Fixed Output Voltage 2.1V
  • Small External Output Filter Components 2.2µH/ 2.2µF
  • Optimized For Low Output Ripple Voltage
  • Small 1 × 1.5 × 0.6mm3 SON Package
  • 12 mm² Minimum Solution Size

Functional Diagram
Functional Diagram
Texas Instruments ADS1292 2-Channel, 24-Bit AFE

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Additional Resources

Texas Instruments ADS1292 2-Channel, 24-Bit Analog Front End (AFE) is a multichannel, simultaneous sampling, 24-bit, delta-sigma analog-to-digital converter (ADC) with a built-in programmable gain amplifier (PGA), internal reference, and an onboard oscillator. TI ADS1292 incorporates all the features commonly required in portable, low-power medical electrocardiogram (ECG), sports, and fitness applications. This TI AFE features high levels of integration and exceptional performance, enabling the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost. ADS1292 has a flexible input multiplexer per channel that can be independently connected to the internally-generated signals for test, temperature, and lead-off detection.

Features
  • Two Low-Noise PGAs and Two High-Resolution ADCs (ADS1292 and ADS1292R)
  • Low Power: 335µW/channel
  • Input-Referred Noise: 8µVPP (150Hz BW, G = 6)
  • Input Bias Current: 200pA
  • Data Rate: 125SPS to 8kSPS
  • CMRR: -105dB
  • Programmable Gain: 1, 2, 3, 4, 6, 8, or 12
  • Supplies: Unipolar or Bipolar
    • Analog: 2.7V to 5.25V
    • Digital: 1.7V to 3.6V
  • Built-In Right Leg Drive Amplifier, Lead-Off Detection, Test Signals
  • Integrated Respiration Impedance Measurement (ADS1292R)
  • Built-In Oscillator and Reference
  • Flexible Power-Down, Standby Mode
  • SPI™-Compatible Serial Interface
  • Operating Temperature Range: -40°C to +85°C
Applications
  • Medical Instrumentation (ECG) including:
    • Patient monitoring: Holter, event, stress, and vital signs including ECG, AED, and telemedicine
    • Sports and fitness (heart rate, respiration, and ECG)
    • High-Precision, Simultaneous, Multichannel Signal Acquisition

Part Number Number of Channels ADC Resolution (Bits) Max Sample Rate (kSPS)
ADS1291 1 24 8
ADS1292 2 24 8
ADS1292R 2 24 8

Block Diagram

Block Diagram
Texas Instruments MSP430F5308 Mixed Signal Microcontroller

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Additional Resources

TI MSP430F5308 is an MSP430 microcontroller (MCU) configuration with 3.3V LDO, four 16-bit timers, a high-performance 10-bit analog-to-digital converter (ADC), two universal serial communication interfaces (USCI), hardware multiplier, DMA, real-time clock module with alarm capabilities and 31 or 47 I/O pins. Typical applications for TI MSP430F5308 include analog and digital sensor systems, digital motor control, remote controls, thermostats, digital timers, and hand-held meters. MSP430 family of ultra-low-power microcontrollers consists of several devices featuring different sets of peripherals targeted for various applications. The architecture, combined with five low-power modes is optimized to achieve extended battery life in portable measurement applications. The device features a powerful 16-bit RISC CPU, 16-bit registers, and constant generators that contribute to maximum code efficiency. The digitally controlled oscillator (DCO) allows wake-up from low-power modes to active mode in less than 5µs.


Features
  • Low Supply-Voltage Range, 1.8 V to 3.6 V
  • Ultra-Low Power Consumption
  • Active Mode (AM)
  • All System Clocks Active
  • 195 µA/MHz at 8 MHz, 3 V, Flash Program Execution (Typical)
  • 115 µA/MHz at 8 MHz, 3 V, RAM Program Execution (Typical)
  • Standby Mode (LPM3)
  • Real-Time Clock With Crystal, Watchdog, and Supply Supervisor Operational, Full RAM Retention, Fast Wake-Up: 1.9 µA at 2.2 V, 2.1 µA at 3 V (Typical)
  • Low-Power Oscillator (VLO), General-Purpose Counter, Watchdog, and Supply Supervisor Operational, Full RAM Retention, Fast Wake-Up: 1.4 µA at 3 V (Typical)
  • Off Mode (LPM4)
  • Full RAM Retention, Supply Supervisor Operational, Fast Wake-Up: 1.1 µA at 3 V (Typical)
  • Shutdown Mode (LPM4.5): 0.18 µA at 3 V (Typical)
  • Wake-Up From Standby Mode in Less Than 5 µs
  • 16-Bit RISC Architecture, Extended Memory, Up to 25-MHz System Clock
  • Flexible Power Management System
  • Fully Integrated LDO With Programmable Regulated Core Supply Voltage
  • Supply Voltage Supervision, Monitoring, and Brownout
  • Unified Clock System
  • FLL Control Loop for Frequency Stabilization
  • Low-Power Low-Frequency Internal Clock Source (VLO)
  • Low-Frequency Trimmed Internal Reference Source (REFO)
  • 32-kHz Watch Crystals (XT1)
  • High-Frequency Crystals up to 32 MHz (XT2)
Applications
  • Analog and Digital Sensor Systems
  • Digital Motor Control
  • Remote Controls
  • Thermostats
  • Digital Timers
  • Hand-Held Meters

Functional Diagram
Functional Diagram
  • Texas Instruments