Configurable NDIR gas sensing and pH sensing AFEs
March 08, 2012 // Paul Buckley
Texas Instruments Incorporated has introduced two configurable analog front ends (AFE) that provide an easy-to-use, modular solution for bridging the gap between the microprocessor and sensor. Design engineers can reduce their development time by using a single AFE across multiple nondispersive infrared (NDIR) gas sensor and pH sensor platforms instead of designing several complex discrete solutions.
The highly-integrated LMP91050 NDIR gas sensing AFE supports multiple thermopile sensors for NDIR sensing, indoor CO2 monitoring, demand control ventilation, HVAC, alcohol breath analysis, greenhouse gas monitoring and Freon detection.
The LMP91050 NDIR Gas Sensing AFE integrates a programmable gain amplifier (PGA), dark phase offset cancellation circuitry, adjustable common-mode generator, and SPI interface to simplify system design. The device features low gain range and high gain range, allowing the use of thermopiles with different sensitivities.
The LMP91050 offers low gain drift of 100 ppm/degrees C (maximum), output offset drift of 1.2 mV/C, phase delay variation of 500 ns, low noise at 0.1 V rms (0.1 to 10 Hz), and operation between -40C to 105C provide optimized system performance. Integration shrinks package to 3 mm x 4.9 mm, enabling smaller end products.
The highly-integrated LMP91200 pH sensing AFE supports two electrode pH sensors used in analyzer platforms for emissions monitoring, steam and water quality monitoring, chemical/petrochemical plants, food processing and more.
The LMP91200 pH Sensing AFE integrates a PGA, ultra-low input-bias pH buffer, signal guarding, temperature and measurement calibration, and common-mode generation and diagnostics circuitry, allowing use of a single chip to interface to most of todays pH sensors.
The devices on-board sensor test ensures proper connection and functionality, and ultra-low bias current of 0.4 pA (maximum) boosts system reliability and accuracy while also protecting the pH electrodes during no supply situations.All news
Dark clouds over lighting business: Osram announces massive job cuts
July 30, 2014
Amidst the decline of conventional illuminants like incandescent bulbs and fluorescent tubes, lighting manufacturer Osram ...
Trillion Sensor Summit program set for Munich
IoT: sensor fusion or confusion?
Next-gen HiFi competition takes place in the car
Rohde & Schwarz acquires IT security company
Pure lithium anode promises more efficient rechargeable batteries
July 29, 2014
Researchers at Stanford University claim to have designed a pure lithium anode that could lead to the prospect of smaller, ...
Is a room temperature superconductor possible?
High-temperature superconductivity discovery paves way for energy superhighways
BMW invoke fast battery chargers to spark EV sales
- Testing GPS with a Simulator
- DSM presents: Select the best plastic for DDR4
- Dual 13A μModule Regulator with Digital Interface for Remote Monitoring & Control of Power
- Exploring the Business Model Evolution of High-Tech Equipment Manufacturers
InterviewCEO interview: China, not Apple, is way to go, says mCube CEO
Ben Lee, CEO of MEMS startup mCube, explains why he wants to spend $37 million on being a supplier of sensors to Chinese ODMs and avoiding a design win with Apple or Samsung.
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Altium Ltd is offering EETimes Europe's readers the chance to win one TASKING VX-Toolset for ARM Cortex-M Premium Edition, normally licensed for 2.395 Euros, for ultra-rapid prototyping and code development around ARM Cortex-M based microcontrollers.
The VX-toolset for ARM is the first TASKING compiler suite to receive the Software Platform technology, which is seamlessly...Read more
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.