MEMS Microphones Analog Omni directional microphone

Board Mount Temperature Sensors LM75 Replacement

The AD590 is a 2-terminal integrated circuit temperature trans-ducer that produces an output current proportional to absolute temperature. For supply voltages between 4 V and 30 V, the device acts as a high impedance, constant current regulator passing 1 μA/K. Laser trimming of the chip’s thin-film resistors is used to calibrate the device to 298.2 μA output at 298.2 K (25°C).The AD590 should be used in any temperature-sensing application below 150°C in which conventional electrical temperature sensors are currently employed. The inherent low cost of a monolithic integrated circuit combined with the elimination of support circuitry makes the AD590 an attractive alternative for many temperature measurement situations. Linearization circuitry, precision voltage amplifiers, resistance measuring circuitry, and cold junction compensation are not needed in applying the AD590.In addition to temperature measurement, applications include temperature compensation or correction of discrete components, biasing proportional to absolute temperature, flow rate measurement, level detection of fluids and anemometry. The AD590 is available in die form, making it suitable for hybrid circuits and fast temperature measurements in protected environments.The AD590 is particularly useful in remote sensing applications. The device is insensitive to voltage drops over long lines due to its high impedance current output. Any well-insulated twisted pair is sufficient for operation at hundreds of feet from the receiving circuitry. The output characteristics also make the AD590 easy to multiplex: the current can be switched by a CMOS multiplexer, or the supply voltage can be switched by a logic gate output.PRODUCT HIGHLIGHTS The AD590 is a calibrated, 2-terminal temperature sensor requiring only a dc voltage supply (4 V to 30 V). Costly transmitters, filters, lead wire compensation, and linearization circuits are all unnecessary in applying the device. State-of-the-art laser trimming at the wafer level in conjunction with extensive final testing ensures that AD590 units are easily interchangeable. Superior interface rejection occurs because the output is a current rather than a voltage. In addition, power requirements are low (1.5 mW @ 5 V @ 25°C). These features make the AD590 easy to apply as a remote sensor. The high output impedance (>10 MΩ) provides excellent rejection of supply voltage drift. For instance, changing the power supply from 5 V to 10 V results in only a 1 μA maximum current change, or 1°C equivalent error. The AD590 is electrically durable: it withstands a forward voltage of up to 44 V and a reverse voltage of 20 V. Therefore, supply irregularities or pin reversal does not damage the device.

The ADIS16203 is a complete incline-angle measurement system ina single compact package enabled by the Analog Devices, Inc.,iSensor™ integration. By enhancing the Analog Devices iMEMS®sensor technology with an embedded signal processing solution, the ADIS16203 provides factory-calibrated, sensor-to-digital incline-angle data in a convenient format that can be accessed using aserial peripheral interface (SPI). The SPI interface provides access to multiple measurements: 360° linear inclination angles, ±180°linear incline angles, temperature, power supply, and one auxiliaryanalog input. Easy access to calibrated digital sensor data providesdevelopers with a system-ready device, reducing developmenttime, cost, and program risk.Unique characteristics of the end system are accommodatedeasily through several built-in features, such as a single-command offset calibration, along with convenient sample rate and band-width control.The ADIS16203 offers the following embedded features that eliminate the need for external circuitry and provide a simplified system interface: Configurable alarm function Auxiliary 12-bit analog-to-digital converter (ADC) Auxiliary 12-bit digital-to-analog converter (DAC) Configurable digital I/O port Digital self-test functionThe ADIS16203 offers two power management features formanaging system-level power dissipation: low power mode anda configurable shutdown feature.The ADIS16203 is available in a 9.2 mm × 9.2 mm × 3.9 mmlaminate-based land grid array (LGA) package with a temperature range of −40°C to +125°C.APPLICATIONS Tilt sensing, inclinometers Platform control, stabilization, and leveling Motion/position measurement Monitor/alarm devices (security, medical, safety) Robotics

The ADXL343 is a versatile 3-axis, digital-output, low g MEMS accelerometer. Selectable measurement range and bandwidth, and configurable, built-in motion detection make it suitable for sensing acceleration in a wide variety of applications. Robustness to 10,000 g of shock and a wide temperature range (−40°C to +85°C) enable use of the accelerometer even in harsh environments.The ADXL343 measures acceleration with high resolution (13-bit) measurement at up to ±16g. Digital output data is formatted as 16-bit twos complement and is accessible through either an SPI (3- or 4-wire) or I2C digital interface. The ADXL343 can measure the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. Its high resolution (3.9 mg/LSB) enables measurement of inclination changes less than 1.0°.Several special sensing functions are provided. Activity and inactivity sensing detect the presence or lack of motion. Tap sensing detects single and double taps in any direction. Free-fall sensing detects if the device is falling. These functions can be mapped individually to either of two interrupt output pins.An integrated memory management system with a 32-level first in, first out (FIFO) buffer can be used to store data to minimize host processor activity and lower overall system power consumption.The ADXL343 is supplied in a small, thin, 3 mm × 5 mm × 1 mm, 14-terminal, plastic package.APPLICATIONS Handsets Gaming and pointing devices Hard disk drive (HDD) protection

The high performance ADXL350 is a small, thin, low power,3-axis accelerometer with high resolution (13-bit) and selectablemeasurement ranges up to ±8 g. The ADXL350 offers industry-leading temperature performance with guaranteed min/max specification for offset over temperature. Digital output data isformatted as 16-bit twos complement and is accessible througheither a SPI (3- or 4-wire) or I2C digital interface.The ADXL350 is well suited for high performance portableapplications. It measures the static acceleration of gravity in tilt sensingapplications, as well as dynamic acceleration resultingfrom motion or shock. Its high resolution (2 mg/LSB) enablesmeasurement of inclination changes of less than 1.0°.Several special sensing functions are provided. Activity andinactivity sensing detect the presence or lack of motion and ifthe acceleration on any axis exceeds a user-set level. Tap sensingdetects single and double taps. Free-fall sensing detects if thedevice is falling. These functions can be mapped to one of twointerrupt output pins.Low power modes enable intelligent motion-based powermanagement with threshold sensing and active accelerationmeasurement at extremely low power dissipation.The ADXL350 is supplied in a small, thin, 3 mm × 4 mm ×1.2 mm, 16-lead cavity laminate package.APPLICATIONS Portable Consumer Devices High performance medical and industrial applications

The ADXL363 is an ultralow power, three-sensor combination consisting of a 3-axis MEMS accelerometer, a temperature sensor, and an on-board analog-to-digital converter (ADC) input for synchronous conversion of an external signal. The entire system consumes less than 2 μA at a 100 Hz output data rate and 270 nA when in motion triggered wake-up mode.The ADXL363 communicates via a serial port interface (SPI) and always provides 12-bit output resolution for all three sensors.The ADXL363 temperature sensor operates with a scale factor of 0.065°C/LSB (typical). Acceleration and temperature data can be stored in a 512-sample multimode first in, first out (FIFO) buffer, allowing up to 13 sec of data to be stored.In addition to the accelerometer and temperature sensor, the ADXL363 also provides access to an internal ADC for synchronous conversion of an additional analog input.The ADXL363 operates on a wide 1.6 V to 3.5 V supply range, and can interface, if necessary, to a host operating on a separate, lower supply voltage. The ADXL363 is available in a 3 mm × 3.25 mm × 1.06 mm package.APPLICATIONS Home healthcare devices Wireless sensors Motion enabled metering devices

The ADXRS646 is a high performance angular rate sensor(gyroscope) that offers excellent vibration immunity. Biasstability is a widely-recognized figure of merit for highperformance gyroscopes, but in real-world applications,vibration sensitivity is often a more significant performancelimitation and should be considered in gyroscope selection. TheADXRS646 offers superior vibration immunity and accelerationrejection as well as a low bias drift of 12°/hr (typical), enabling itto offer rate sensing in harsh environments where shock andvibration are present.The ADXRS646 is manufactured using the Analog Devices,Inc., patented high volume BiMOS surface-micromachiningprocess. An advanced, differential, quad sensor design providesthe improved acceleration and vibration rejection. The outputsignal, RATEOUT, is a voltage proportional to angular rateabout the axis normal to the top surface of the package. Themeasurement range is a minimum of ±250°/sec. The output isratiometric with respect to a provided reference supply. Otherexternal capacitors are required for operation.A temperature output is provided for compensation techniques.Two digital self-test inputs electromechanically excite the sensorto test proper operation of both the sensor and the signal conditioningcircuits.The ADXRS646 is available in a 7 mm × 7 mm × 3 mm CBGAchip-scale package.APPLICATIONS Industrial applications Severe mechanical environments Platform stabilization

The ADA4571 is an anisotropic magnetoresistive (AMR) sensorwith integrated signal conditioning amplifiers and ADC drivers.The ADA4571 produces two analog outputs that indicate theangular position of the surrounding magnetic field.The ADA4571 consists of two die within one package, an AMRsensor, and a fixed gain (G = 40 nominally) instrumentationamplifier. The ADA4571 delivers clean and amplified cosineand sine output signals related to the angle of a rotatingmagnetic field. The output voltage range is ratiometric to thesupply voltage.The sensor contains two Wheatstone bridges, at a relative angleof 45° to one another. A rotating magnetic field in the x-ysensor plane delivers two sinusoidal output signals with thedouble frequency of the angle (α) between sensor and magneticfield direction. Within a homogeneous field in the x-y plane,the output signals are independent of the physical placement inthe z direction (air gap).The ADA4571 is available in an 8-lead SOIC package.Product Highlights Contactless angular measurement. Measures magnetic field direction rather than field intensity. Minimum sensitivity to air gap variations. Large working distance. Excellent accuracy, even for weak saturation fields. Minimal thermal and lifetime drift. Negligible hysteresis. Single chip solution.Applications Absolute position measurement (linear and angle) Brushless dc motor control and positioning Actuator control and positioning Contactless angular measurement and detection Magnetic angular position sensing

The ADIS16490 is a complete inertial system that includes a triaxis gyroscope and a triaxis accelerometer. Each inertial sensor in the ADIS16490 combines industry leading iMEMS® technology with signal conditioning that optimizes dynamic performance. The factory calibration characterizes each sensor for sensitivity, bias, alignment, and linear acceleration (gyroscope bias). As a result, each sensor has its own dynamic compensation formulas that provide accurate sensor measurements.The ADIS16490 provides a simple, cost effective method for integrating accurate, multiaxis inertial sensing into industrial systems, especially when compared with the complexity and investment associated with discrete designs. All necessary motion testing and calibration are part of the production process at the factory, greatly reducing system integration time. Tight orthogonal alignment simplifies inertial frame alignment in navigation systems. The SPI and register structure provide a simple interface for data collection and configuration control.The ADIS16490 uses the same footprint and connector system as the ADIS16375, ADIS16480, ADIS16485, and ADIS16488A, which greatly simplifies the upgrade process. The ADIS16490 is packaged in a module that is approximately 47 mm × 44 mm × 14 mm and includes a standard connector interface.Applications Precision instrumentation, stabilization Guidance, navigation, control Avionics, unmanned vehicles Precision autonomous machines, robotics