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This application brief describes the behavior of the Texas Instruments (TI(TM)) TMS320C2xx pipeline during an interrupt occurring around the SETC and CLRC instructions. This brief also explains how to change the appropriate bit in the IMR register to protect a block of code without globally disabling interrupts.Each scenario was tested using the TMS320C209SE ('C209SE) DSP and its internal time

CAN Products from National Semiconductor Users Guide and Application Note

With the proper considerations ceramic output capacitors can be used with low dropout regulators (LDO) and DC/DC switching converters that require tantulum output capacitors.

Synchronous dual output buck converter supplies two cores with 7A each out of 5V to 20V source

This design implements a three-phase energy meter with Wi-Fi connectivity. The e-meter SoC is used to perform all metrology functions and control the SimpleLink™ Wi-Fi transceiver. The smart meter data can then be displayed on any Wi-Fi connected device via a standard web browser.

Wide Bandwidth Receiver Implementation by Interleaving Two Giga-Sampling ADCs ADC12D1800RF, LMK04808, ADC12D1600RF

The LTC2688 is a 16-channel,16-bit, ?15 V digital-to-analog converter (DAC) with an integrated precision reference. The LTC2688 is guaranteed monotonic and has built in rail-to-rail output buffers that can source or sink up to 20 mA. This SoftSpan? DAC offers five output ranges up to ?15 V. The range of each channel is independently programmable.The internal 4.096 V precision reference sets the accuracy of the output voltage. An external reference can be used for additional range options. Three toggle pins support Input Register A and Input Register B toggle or sinusoidal dither at multiple frequencies. An analog multiplexer simplifies measurement of pin voltages, load currents, and junction temperature.Programmable offset and gain registers improve the accuracy of the DAC outputs.The serial peripheral interface (SPI) and MICROWIRE?-compatible, 3-wire serial interface operates on logic levels as low as 1.71 V and clock rates up to 50 MHz.APPLICATIONSOptical networkingInstrumentationData acquisitionAutomatic test equipmentProcess control and industrial automation

The ADR1399 precision shunt reference features excellent temperature stability over a wide range of voltage, temperature, and quiescent current conditions. A temperature stabilizing loop is incorporated with the active Zener on a monolithic? substrate, which nearly eliminates changes in voltage with temperature. The subsurface Zener circuit is fully specified at a quiescent current IREF of 3 mA and offers minimal noise (1.44 ?V p-p, 0.1 Hz to 10 Hz) and excellent long-term stability (7 ppm/?kHr). The ADR1399 offers a lower output dynamic impedance (0.08 ?) than the LM399, reducing the effects of shunt resistor (RSHUNT) and the supply voltage variation on the reference output.Ideal applications for the ADR1399 include ultrastable digital voltmeters, precision calibration equipment, and ultrarepeatable analog-to-digital converters (ADCs). The simplicity of the basic pin configurations is shown in Figure 1. The 8-terminal LCC version offers force and sense pins for lower dynamic impedance and for Kelvin sensing. Table 1. Related Products Model Output Voltage (V) Initial Accuracy Range (mV) ADR1399 7.05 ?300 to +250 LTZ1000 7.2 ?200 to +300 LM399 6.95 ?200 to +350 LT1236 5 and 10 ?2.5 to +2.5 APPLICATIONS Precision voltage reference for multimeters Calibration equipment voltage standards Laboratory measurement equipment Industrial monitor and control instrumentation Ultrastable data convertors

The ADP5071 is a dual high performance dc-to-dc regulator that generates independently regulated positive and negative rails.The input voltage range of 2.85 V to 15 V supports a wide variety of applications. The integrated main switch in both regulators enables generation of an adjustable positive output voltage up to +39 V and a negative output voltage down to ?39 V below input voltage.The ADP5071 operates at a pin selected 1.2 MHz/2.4 MHz switching frequency. The ADP5071 can synchronize with an external oscillator from 1.0 MHz to 2.6 MHz to ease noise filtering in sensitive applications. Both regulators implement programmable slew rate control circuitry for the MOSFET driver stage to reduce electromagnetic interference (EMI).Flexible start-up sequencing is provided with the options of manual enable, simultaneous mode, positive supply first, and negative supply first.The ADP5071 includes a fixed internal or resistor programmable soft start timer to prevent inrush current at power-up. During shutdown, both regulators completely disconnect the loads from the input supply to provide a true shutdown.Other key safety features in the ADP5071 include overcurrent protection (OCP), overvoltage protection (OVP), thermal shutdown (TSD), and input undervoltage lockout (UVLO).The ADP5071 is available in a 20-lead LFCSP or in a 20-lead TSSOP and is rated for a ?40?C to +125?C junction temperature range.Applications Bipolar amplifiers, ADCs, DACs, and multiplexers Charge-coupled device (CCD) bias supply Optical module supply RF power amplifier (PA) bias

From a Li-Ion battery the PMP2631 supplies 5V @ 3A with the best possible efficiency due to the sync-boost topology.

Demonstration circuit 1368A exercises four adjustable linear regulators in parallel using the LT3080-1, which incorporates an internal ballast resistor. The ballast resistor allows direct paralleling of devices without the need for PC board resistors or sensor resistors.The paralleled devices provide up to 4.4A of output current at 1.2V. Architected as a precision current source and voltage follower, the LT3080-1 can be used in many applications requiring high current, adjustability to zero output, and no heat sink. The device brings out the collector of the pass transistor to allow low dropout operation when used with multiple supplies. The LT3080-1's output voltage can be programmed to any level between 0V and 36V; however the demo board has a reduced input voltage range from 1.7V to 25V due to the input capacitor voltage rating.

This application report demonstrates the use of the Micrium uC/OS-II real-time kernel on an MSP430 microcontroller with very low memory overhead. Suggestions on how to effectively use the features of MSP430 and µC/OS-II to optimize a project are included. This report also explains how to effectively use MSP430 ultralow-power modes with uC/OS-II projects.

The PMP7022 is 1mW (3.1V at 300uA) galvanic isolated DC/DC reference design built to supply a MSP430 metering unit. The design utilising again MSP430 open loop push-pull stage. Very efficient design with current supply (inclusive load current) as low as 800uA. Input voltage range: 3.1VDC-3.3VDC; Output current: 300uA; Output voltage: 3.1VDC

The MSP430 is typically used in applications such as metering, intelligent sensing, control systems and portable instrumentation. In some systems, the microcontroller may need to interface to an exter

This reference design is for a concept demonstration of how a driver's pulse rate: respiration rate: and ECG based heart rate can be obtained from a vehicle steering wheel. AFE4400 and AFE4300 from TI's biometric family of analog front-ends (AFE): enables acquisition of all three parameters via simple hand contacts on the steering wheel. This reference design also includes a full BLE connectivity design for easy interface to BLE enabled smartphones: tablets: etc

This TI Precision Verified Design provides the theory: component selection: simulation: complete PCB schematic and layout: bill of materials: and measured performance of a split-supply: high-side four decade current sensing solution that can accurately detect load currents from 10uA-100mA. The corresponding linear output is from 10mV to 4.9V which enables measurement by common 5V ADCs. The design utilizes the PGA281: an instrumentation amplifier with pin-programmable gain and a wide common-mode voltage range: to provide a more accurate and versatile solution than traditional op amps.See more TI Precision Designs