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Category: Sensing Reference Designs

Backlight and Smart Lighting Control by Ambient Light and Proximity Sensor Reference Design

This system conserves power and extends backlight life by dynamically adjusting the backlight brightness relative to the environment's ambient light.  A capacitive proximity sensor wakes up the system when a user is close to save even more power. Watch related videos about Sensing NOW.
System Block Diagrams
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Basic Fan Controller Reference Design with Over-Temperature Detection

TIDA-00517 provides a complete reference design for basic fan control leveraging minimal components.  This design features a  TMP302 temperature switch to detect over temperature conditions in personal electronics: industrial PCs: power distribution units and other applications leveraging fans to control temperature conditions. This simple design can be easily modified for different voltage…
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Body Weight Scale Reference Design with Body Composition capability and BLE Connectivity

This reference design is for a complete body weight scale end equipment with body composition capability featuring TI signal chain: power: and connectivity components. With TI's AFE4300 weigh scale/body composition AFE: you can accelerate your body weight scale design or quickly add body composition measurement features to your existing platform. This reference design also includes the full BLE…
System Block Diagrams
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CAMPBELL (MAXREFDES4#): 16-BIT HIGH-ACCURACY 4-20MA INPUT ISOLATED ANALOG FRONT END (AFE)

The Campbell (MAXREFDES4#) subsystem reference design is a 16-bit high-accuracy industrial analog front end (AFE) that accepts a 4–20mA current loop or a 0.2V to 4.096V voltage input signal, and features isolated power and data—all integrated into a small form factor. The Campbell design integrates a precision low-noise buffer (MAX44250), a high-accuracy ADC (MAX11100), an…
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Capacitive Frost or Ice Detection Reference Design: Resolution of

Frost and ice buildup on cooling bodies and evaporators can significantly decrease system energy efficiency in many appliance applications such as refrigerators: air conditioners: and freezers. This sensor reference design helps to achieve the more stringent energy efficiency requirements of modern appliances through reducing the number of unnecessary defrost cycles by sensing the amount of ice…
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Capacitive Touch Remote Control Reference Design With CapTIvate™ Technology

The touch remote control enabled with CapTIvate technology demonstrates a capacitive-touch solution based on a single MSP430 microcontroller (MCU) with CapTIvate technology. This design uses self- and mutual-capacitance technology to enable a multifunctional: capacitive-touch panel (buttons: slider: gesture pad: grip sensor and proximity sensor) for smart TV: settop box: and sound system remote…
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Capacitive Touch Thermostat UI with MSP MCUs Featuring CapTIvate Technology Reference Design

TIDM-CAPTIVATE-THERMOSTAT-UI is a low-power: capacitive touch based: thermostat user interface reference design. It features an on-board MSP430TM MCU CapTIvate technology which provides robust capacitive touch measurements with a low-power profile: low response time: and increased noise immunity. The design supports multiple modes of operation: including a battery powered mode and a line powered…
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Capacitive-Based Human Proximity Detection for System Wake-Up & Interrupt Reference Design

This TI Design uses Texas Instruments' capacitive-to-digital converter technology to provide a high-precision method to wake up systems when human interaction occurs. TIDA-00220 demonstrates techniques for alternative sensor design: environmental compensation: and electromagnetic interference protection.
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Capacitive-Based Liquid Level Sensing Sensor Reference Design

This TI Design with the use of the FDC1004EVM provides a robust and accurate capacitive-based liquid level sensing solution. TIDA-00317 demonstrates the sensor design and configuration setup to mitigate parasitic capacitance interference from the system environment.
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Capacitor Bank Control and HMI Subsystem Reference Design for Automatic Power Factor Controller

The TIDA-00737 TI design demonstrates working of various functional blocks of an Automatic Power Factor Controller used in MV/LV electrical distribution including – Accurate measurement and computation of voltages: currents: power and power factor; Display of measured parameters using 4 digit seven segment display; Alarms and Status indication using LEDs; Switching outputs for driving Contactor…
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CARMEL (MAXREFDES18#): HIGH ACCURACY ANALOG CURRENT/VOLTAGE OUTPUT

The buffered voltage output from the MAX5316 16-bit, high-accuracy digital-to-analog converter (DAC) drives the input of the MAX15500, a programmable analog output conditioner with extensive error reporting. The MAX6126 ultra-high-precision voltage reference provides references for the DAC and the output conditioner. The MAX14850 galvanically isolates data communication between the…
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Complete Gate Drive and Bias Power Solution for Solar MicroInverter’s DC/DC and DC/AC Blocks

PMP9461 is a reference design with complete power and gate drive requirements for grid tie solar microinverters.  The major goal of the reference design is to acheive significant integration and perfomance enhancement in gate drive as well as the bias supply segment of microInverters.  The solution features SM72295 (full bridge gate driver with integrated current sense): SM74101 (7A Sink/3A…
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Contactless AC-Current Sensing Using a Hall Effect Sensor

This TI Design uses Texas Instruments' Hall sensing technology to provide a solution for knowing how much AC current is flowing through a wire without any physical intervention. TIDA-00218 implements a flux concentrator to concentrate the flux around the AC current-carrying wire: rather than letting it escape in air: and then directing that flux to a hall sensor.
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Contactless Position Sensor for Variable Speed Trigger Switch w/

The TI Design TIDA-00475 demonstrates contactless: robust: cost effective: position sensing for variable speed trigger switches common in power and garden tools. The MSP430G2x53 microcontroller determines accurately the trigger position and generates the PWM signal to control motor speed and torque. This capacitive potentiometer enables by design high reliability: long life time: and robust…
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Current Sense Reference Design for High-Switching Transient Three-Phase Inverter for Servo Drives

The TIDA-01455 is a reinforced isolated: in-line: shunt-based: precision-phase current sensing reference design for three-phase inverters. One of the challenges with GaN or SiC inverters at high PWM switching is accurate phase current sensing across the shunt in presence of noise due to the high PWM frequency and high common-mode voltage transients. This challenge is solved by an isolation…
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Current Sensing Solution: 10uA-10mA: Low-side: Single Supply

This TI Reference Design provides the theory: component selection: and simulation of a single-supply: precision low-side current sensing solution that can accurately detect load currents from 10uA-10mA. The corresponding linear output is from 100mV to 4.9V. While traditional op amps can be used for such an application: the INA326 instrumentation amplifier enables a differential measurement and…
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Current Sensing with

The TIDA-00778 reference design demonstrates fast and accurate current sensing for a three-phase motor driven with sensorless field-oriented control (FOC). Drives with lower audible noise require faster andaccurate current sensing. The most common low-cost current-sensing methods use a single shunt on the DC bus return path or two to three shunts in the inverter legs. The major challenge in motor…
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Current Shunt Monitor with Transient Robustness Reference Design

This high-side current shunt monitor is used to measure the voltage developed across a current-sensing resistor when current passes through it.Additionally: an external protection circuit is implemented to provide surge and fast-transient protection and demonstrate the different immunity levels to IEC61000-4-4 and IEC61000-4-5.
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Daisy chain temperature sensor reference design for SensorTag

The TIDA-00800 reference design entails 4 temperature sensors along a daisy chain in a cabling environment.  The sensors connect to the SensorTag development platform via the UART interface where the information can be transmitted wirelessly.  The Bluetooth low energy wireless technology makes testing and demonstration easier due to its integration in most modern equipment.  The form factor and…
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Dimmable LED Driver Reference Design For Aftermarket Light Bars: Spot Lights: and Flood Lights

This in an automotive boost LED driver designed to drive an LED string of up to 34V at a maximum of 34W of output power. This solution as designed passes CISPR 25 class 3 EMC requirements and is capable of 10:1 analog dimming. High side current sensing allows one end of the LED string to be tied to system ground for ease of connections.
System Block Diagrams
The following system block diagrams are available from Texas Instruments: