TI Winning Solutions
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Check out a chemical and gas sensor solution that provides onboard processing and a configurable interface, allowing a single detector to be used for multiple sensor types. TI is the only company that can combine a programmable gas sensor AFE with a low power/high performance MCU
and an integrated 4-20 mA driver to offer a compact solution that
enables designers to have one sensor design capable of supporting
multiple chemical and gas sensors. Texas Instruments provides winning a Chemical/Gas Sensor Solution!
LMP91000 Configurable AFE Potentiostat
MSP430F2003 16-Bit Ultra-Low-Power Microcontroller
XTR117 4-20mA Current Loop Transmitter
BQ25504 Ultra-Low Power Boost Converter
Key Solution Features
- Configurable AFE with integrated electrode excitation
- One design solution fits multiple electro-chemical sensors
- 16-bit MCU for configuration and communication
- Extremely low power extends battery life and ensures operation under 4mA
- Enables online or factory programmed configuration and calibration of sensor
- 4-20mA Current Loop Transmitter
- Integrated 5V regulator capable of providing system power
- .05% span error
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LMP91000
LMP91000 Configurable AFE Potentiostat
The
LMP91000
is a programmable
Analog Front End
(
AFE)
for use in micro-power
electrochemical sensing
applications that provides a complete signal path solution between a
sensor
and a
microcontroller
that generates an output voltage proportional to the cell current. The
LMP91000
's programmability enables it to support multiple
electrochemical sensors
such as 3-lead toxic
gas sensors
and 2-lead galvanic cell
sensors
with a single design, as opposed to the multiple discrete solutions. The
LMP91000
supports gas sensitivities over a range of 0.5 nA/ppm to 9500 nA/ppm and also allows for an easy conversion of current ranges from 5µA to 750µA full scale. Its adjustable cell bias and
transimpedance amplifier
(
TIA
) gain are programmable through the I
2
C interface. The
LMP91000
is optimized for micro-power applications and operates over a voltage range of 2.7V to 5.25V.
MSP430F2003
MSP430F2003 Ultra-Low-Power Microcontroller
The
MSP430
family of ultra-low-power
microcontrollers
from
Texas Instruments
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
MSP430F20xx
series is an ultra-low-power mixed signal
microcontroller
with a built-in 16-bit timer and 10 I/0 pins. The
MSP430F2003
has built-in communication capability using synchronous protocols (SPI
or
I2C
) and a 16-bit sigma-delta A/D converter.
Features
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Ultra-low power consumption
- Active mode: 220µA at 1MHz, 2.2V
- Standby mode: 0.5µA
- Off Mode (RAM Retention): 0.1µA
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Five power-saving modes
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Ultra-fast wake-up from standby mode in less
than 1µs
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16-Bit RISC architecture, 62.5-ns instruction cycle time
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Basic clock module configurations:
- Internal frequencies up to 16MHz with four calibrated
frequencies to ±1%
- Internal very low-power, low-frequency oscillator
- 32-kHz crystal
- External digital clock source
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16-bit timer _A with two capture/compare registers
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16-bit Sigma-Delta A/D converter with differential PGA inputs and internal reference
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Universal Serial Interface (USI) supporting SPI and I2C
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Brownout detector
Applications
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Sensor systems for analog-to-digital signal conversion
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Stand-alone RF sensor front end
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View Product Detail
Specifications
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Low supply voltage range: 1.8V to 3.6V
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1KB + 256B Flash Memory
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128B RAM
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Block Diagram
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See Port Schematics section for detailed I/O information
XTR117
XTR117 4-20mA Current-Loop Transmitter
The
XTR117
from
Texas Instruments
is a precision
current output converter
designed to transmit analog 4-20mA signals over an industry-standard current loop. It provides accurate current scaling and output current limit functions. The
XTR117
is a fundamental building block of smart
sensors
using 4-20mA current transmission. The
XTR117
is specified for operation over the extended industrial temperature range -40ºC to +125ºC.
Features
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Low quiescent current: 130µA
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5V regulator for external circuits
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Low span error: 0.05%
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Low nonlinearity error: 0.003%
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Wide-loop supply range: 7.5V to 40V
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MSOP-8 and DFN-8 packages
Specifications
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Operating voltage range: 7.5V to 40V
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Operating temperature range: -55°C to 125°C
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Applications
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Two-wire, 4-20mA current loop transmitter
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Smart transmitter
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Industrial process control
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Test systems
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Current amplifier
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Voltage-to-Current amplifier
View Products List
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Diagram
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BQ25504
BQ25504 Ultra-Low Power Boost Converter
The BQ25504 Boost Converter from Texas Instruments is the first of a new family of intelligent energy harvesting Nano-Power management solutions that are well-suited for meeting the special needs of ultra low power applications. The BQ25504 is specifically designed to efficiently acquire and manage the microwatts (µW) to miliwatts (mW) of power generated from a variety of DC sources like photovoltaic (solar) or thermal electric generators.
The BQ25504 is the first device of its kind to implement a highly efficient boost converter/charger targeted toward products and systems, such as wireless sensor networks (WSN) which have stringent power and operational demands.
