High-Accuracy, 3-D Magnetic Sensor

Infineon Technologies recently announced the availability of the TLV493D-A1B6, a 3-D magnetic sensor that features highly accurate three-dimensional sensing with extremely low power consumption in a small six-pin TSOP package. Magnetic field detection in x, y, and z directions enables the sensor to measure 3-D, linear, and rotation movements. The implemented digital I²C interface enables fast and bidirectional communication between the sensor and microcontroller.3D-Magnetic-Sensor_TSOP6_Infineon

The TLV493D-A1B6 is intended for consumer and industrial applications that require accurate 3-D measurements or angular measurements or low power consumption, such as joysticks, electric meters where the 3-D magnetic sensor helps to protect against tampering, and more. With its contactless position sensing and high temperature stability of magnetic threshold, the TLV493D-A1B6 enables these systems to become smaller, more accurate, and robust.

The 3-D magnetic sensor TLV493D-A1B6 enables smaller and more energy efficient e-meter systems. Today, up to three magnetic sensors—one for each dimension of external magnetic field—are needed to measure tampering attempts with large magnets. In future, the 3-D magnetic sensor TLV493D-A1B6 will replace all 3-D sensors thus making e-meters smaller and more energy efficient.

The 3-D sensor TLV493D-A1B6 detects all three dimensions of a magnetic field. Using lateral hall plates for the z direction and vertical Hall plates for the x and y direction of the magnetic field, the sensor can be used in a large magnetic field range of ±150 mT for all three dimensions. This allows measuring and covering a long magnet movement. The large operation scale also makes the magnet circuit design easy, robust and flexible.

The TLV493D-A1B6 provides 12-bit data resolution for each measurement direction. This allows a high data resolution of 0.098 mT per bit (LSB) so that even the smallest magnet movements can be measured.

One of the main development goals for the TLV493D-A1B6 sensor was low power consumption. In Power Down mode, the sensor only requires 7-nA supply current. To perform magnetic measurements, the sensor can be set in one of five different power modes. In Ultra Low Power Mode, for example, the sensor performs a magnetic measurement every 100 ms (10 Hz) resulting in a current consumption of 10 µA. The time between measurement cycles can be set flexibly allowing system specific solutions. Using the sensor with continuous measurements, the maximum power consumption is only 3.7 mA. Also, the power modes can be changed during operation.

The TLV493D-A1B6 uses a standard I²C digital protocol to communicate with external microcontrollers. It is possible to operate the sensors in a bus mode to eliminate additional wiring cost and efforts.

Targeting industrial and consumer applications, TLV493D-A1B6 can be operated on supply voltages between 2.7 and 3.5 V and in a temperature range from –40°C to 125°C. The product is qualified according to industry standard JESD47.

For a fast design-in process, Infineon offers the “3D Magnetic 2Go” evaluation board. In combination with the free 3-D sensor software, first magnetic measurements are attainable within minutes. The evaluation board applies the Infineon 32-bit XMC1100 micrcontroller that uses the ARM Cortex-M0 processor.

The “3D Magnetic 2Go” is currently available (www.ehitex.com). Engineering samples of the TLV493D-A1B6 designed for consumer and industrial applications will be available as of July 2015. Volume production is expected to start in January 2016.

Source: Infineon Technologies

GestIC Controller Enables One-step Design-in of 3-D Gesture Recognition

Microchip Technology recently announced a new addition to its patented GestIC family. The new MGC3030 3-D gesture controller features simplified user-interface options focused on gesture detection, enabling true one-step design-in of 3-D gesture recognition in consumer and embedded devices. Housed in an easy-to-manufacture SSOP28 package, the MGC3030 expands the use of 3-D gesture control features to high-volume, cost-sensitive applications such as audio, lighting, and toys.GestIC

The simplicity of gesture-detection integration offered by the MGC3030 is also achieved through Microchip’s free, downloadable AUREA graphical user interface (GUI) and easily configurable general-purpose IO ports that even allow for host MCU/processor-free usage. The MGC3030’s on-chip 32-bit digital signal processor executes real-time gesture processing, which eliminates the need for external cameras or controllers for host processing and allows for faster and more natural user interaction with devices.

The MGC3030 makes full use of the GestIC family development tools, such as Microchip’s Colibri Gesture Suite, which is an on-chip software library of gesture features. Intuitive and natural movements of the human hand are recognized, making the operation of a device functional, intuitive, and fun. Without the need to touch the device, features such as Flick Gestures, the Air Wheel, or the proximity detection perform commands such as changing audio tracks, adjusting volume control or backlighting, and many others. All gestures are processed on-chip, allowing manufacturers to realize powerful user interfaces with very low development effort.

Unique to GestIC technology, the programmable Auto Wake-Up On Approach feature begins operating in the range of 100-µW power consumption, enabling always-on gesture sensing in power-constrained applications. If real user interaction is detected, the system automatically switches into full sensing mode and alternates back to auto wake-up mode once the user leaves the sensing area. These combined features and capabilities provide designers with the ability to quickly integrate gesture detection features at price points that are ideal for high-volume devices.

Also available is Microchip’s Woodstar MGC3030 Development Kit (DM160226). The $139 kit is available via any Microchip sales representative, authorized worldwide distributor, or microchipDIRECT (www.microchip.com/Dev-Kit-012015a). The kit comes with the AUREA GUI, the central tool to parameterize the MGC3030 and the Colibri Suite to suit the needs of any design. AUREA is available via a free download at www.microchip.com/AUREA-GUI-012015a. The Colibri Gesture Suite is an extensive library of proven and natural 3-D gestures for hands and fingers that is preprogrammed into the MGC3030.

The MGC3030 featuring GestIC technology is available in a 28-pin SSOP package. Each unit costs under $2 each in high volumes.

Source: Microchip Technology

Ultra-Compact Ultrasonic Sensor Series

MaxbotixThe UCXL-MaxSonar-WR series of sensors are flexible, OEM-customizable products that can be integrated into a system with MaxBotix’s horns or flush-mounted into an existing housing. Mounting design recommendations are provided through MaxBotix’s 3-D CAD models (available in multiple formats) to facilitate your design process. The sensor layout offers four conveniently placed mounting holes for design flexibility.

The rugged, high performance sensors are individually calibrated and feature a 1-cm resolution, an operational temperature range from –40˚C to 70˚C, real-time automatic calibration (voltage, humidity, and ambient noise), 200,000+ h mean time between failures (MTBF), and an operational 3-to-5.5-V voltage range with a low 3.4-mA average current requirement.

Contact MaxBotix for pricing.

MaxBotix, Inc.
www.maxbotix.com