1
Download Creator Electronics MAX1301 Specifications
Transcript
Overview Introduction receiving the goods and services that we paid for to live more productive and comfortable lives and to run our industrial processes safely and efficiently. Maxim offers a range of products extending from sensors for properties such as temperature, light, acceleration, etc., to products that shape and convert a sensor’s electrical signals into usable information. A complete sensor assembly includes a transducer (to transform one physical quantity to another: weight, pressure, temperature, humidity, acceleration, or light to an electrical signal), a housing, signal conditioning and communications circuitry, and a connector. Some transducers are resistive elements that require external excitation to create a measurable voltage. Other transducers generate their own voltages or currents in response to physical properties. A sensor is a device that measures a physical property and is generally used to monitor and control an event or process. Examples include sensors for measuring the temperature of a room or of a blast furnace; the pressure in a tire or in a steam turbine; the weight of an item purchased at the grocery store or of a vat of molten steel. The use of sensors permeates our personal lives and our factories. We depend inextricably on the operation and accuracy of sensors to ensure we are TRANSDUCER / BRIDGE The signals coming from transducers are usually very small and require optimized interface circuits to provide AFE FILTER ADC adequate gains without introducing noise that reduces accuracy. Sensor assemblies are often located far from their processing point, so along with signal amplification, the sensor knowledge domain also includes signal communications to ensure the delivery of accurate signals to a processing point. The sensor “signal chain” requires processing for sensor excitation, sensor amplification, signal filtering and conditioning, and the transformation of signals from the analog-to-digital domain, and sometimes back again. Outside the signal chain there are other stringent requirements for power provisioning and management, as well as signal communication among devices/ systems and secure data transmission. DIGITAL DOMAIN COMMUNICATIONS INTEGRATED SIGNAL CONDITIONER Ve R – – – + + + REFERENCE TOUCH SCREEN CompoNet R-∆R HART ADC R+∆R R μC IO-LINK DIGITAL IO OP AMPS PRECISION RESISTORS PGA TEMP SENSORS IA PRECISION RESISTORS DIGITAL POTENTIOMETERS RS-485 FILTERS = MAXIM SOLUTION OP AMPS REF POWER DAC SUPERVISORS TIMING DAC MISCELLANEOUS EXCITATION FEEDBACK Block diagram of a basic sensor system for industrial processes. For a list of Maxim’s recommended sensor solutions, please go to: www.maxim-ic.com/sensor. Sensors 49
