Chandler, Ariz. Microchip Technology Inc.'s digital-temperature sensors (MCP980X) enable designers to protect their applications from thermal changes, while the company's programmable gain amplifier (MCP6S9X) family can be configured during operation for maximum flexibility.
Microchip's digital-temperature sensors (MCP980X) with a ±1°C maximum temperature error, retrieve temperature data, digitally convert it and communicate the information to the microcontroller or central processing unit giving designers the ability to better protect their applications and to respond to thermal changes faster as the device accurately measures temperature, protects and/or calibrates the system and provides thermal information using minimal board space.
Microchip's MCP980X devices convert and communicate the temperature data in about 30 ms (for 9-bit resolution) via an industry standard I ²C or SMBus interface enabling fast identification of thermal issues within the system. Available in a SOT-23 package and no external components necessary, designers can minimize board space and component count while offering sophisticated thermal protection to their applications.
These digital-temperature sensors only use 200μA of operating current and have a shutdown current of 0.1μA, which extend battery life. With a one-shot temperature measurement mode the devices wake up only when the temperature needs to be read and then go back to sleep, which also minimizes power consumption.
The devices offer high resolution (up to 12-bits) which allows for quick anticipation of temperature changes and detection of minor trends in degree changes. This flexible temperature resolution adjusts the conversion time depending on the system needs, assuring that the temperature is read and communicated faster to the outside world. The SMBus system timeout available on the MCP9802/3 devices enable better system reliability by preventing the communication bus from locking up.
Microchip's digital-temperature sensors are meant for use in telecom and networking equipment, office equipment, notebook and servers, battery management, HVAC, process control and general-purpose temperature measurement and thermal protection.
The MCP9800/2 are available in a SOT-23 package and feature internally set slave addresses. The MCP9801/3 are available in MSOP-8 and SOIC-8 packages and offer user-programmable slave addresses. The MCP9802/3 offer a SMBus timeout.
Pricing for the MCP9800 in 1,000-piece units in the 5-pin SOT-23 package is 86 cents each, the MCP9801 in the 8-pin MSOP and SOIC packages is 81 cents each, the MCP9802 in the 5-pin SOT-23 package is 91 cents each and the MCP9803 in the 8-pin MSOP and SOIC packages is 86 cents each. Samples and volume production are available now.
Microchip Introduces Low-Cost, 8-Gain-Step SPI Bus Programmable Gain Amplifier
Microchip's programmable gain amplifier family provides digital control over the amplifier function and design. The ability to configure the system gain and signal path during operation allows maximum flexibility for system self-calibration and other system operation adjustments in a user transparent manner while the end application is in use.
The MCP6S9X devices are programmed over the SPI bus, giving users control of the gain and input channel selection and the design flexibility that otherwise could not be achieved easily. The SPI bus is used to select the gain level and the input channel providing analog input expansion for a microcontroller or digital signal processor. This reduces the cost of the microcontroller by lowering the number of input/output pins needed. Moreover, the multiple channels for the same signal path enable system self-calibration of the analog signal path, enhancing accuracy over time and temperature.
“Microchip has created a truly innovative way to interface analog signals to a microcontroller,” said Art Eck, marketing manager for Microchip's Analog and Interface Product Division. “By controlling an amplifier digitally, the design is no longer fixed and can be modified in operation on the fly, reducing the need for external components.”
Target applications for this product include industrial and instrumentation markets as well as signal and sensor processing.
Available in 1- and 2-channel inputs, this product has eight-gain steps with an amplifier bandwidth of 1 MHz to 18 MHz. The broad bandwidth is achieved in these amplifiers for a lower supply current, which reduces power supply demands. This device has a supply voltage operation of 2.5 to 5.5 V and operates over the -40°C to +125°C range. Additionally, it offers low noise of 10 nV/rtHz, and low offset voltage 150 μV, THD+N 0.0011%, 200-ns settling time and gain steps of 1, 2, 4, 5, 8, 10, 16 & 32 V/V.
In 1,000-piece quantities, the MCP6S91 is available in 8-PDIP, SOIC and MSOP packages, and priced at 75 cents each. The MCP6S92 is available in 8-PDIP, SOIC and MSOP packages at a price of 89 cents each. The MCP6S93 is available in a 10-MSOP package and is priced at $1.07. Samples and volume quantities are available now.
For more information, please visit: www.microchip.com
Readers can call: 1-888-MCU-MCHP.