Demonstration circuit 542 is a dual output, dual phase synchronous step-down controller, featuring the LTC3728EG. Output #1 can be configured for either 5.0V or 3.3V and output #2 can be configured for either 3.3V or 2.5V. The maximum load for both rails is 12A. The input voltage range of the DC542 is 8V to 24V. The DC542 also contains a footprint for a 5.5V boost converter bias supply whose output is connected to EXTVCC. See the “Optional Bias Supply” section for more details.

The ADuC7019?/?ADuC7020?/ ADuC7021 /?ADuC7022?/?ADuC7024?/?ADuC7025?/ ADuC7026?/?ADuC7027?/?ADuC7028?/?ADuC7029 are fully integrated,1 MSPS, 12-bit data acquisition systems incorporating highperformance multichannel ADCs, 16-bit/32-bit MCUs, andFlash?/EE memory on a single chip.The ADC consists of up to 12 single-ended inputs. An additionalfour inputs are available but are multiplexed with the four DACoutput pins. The four DAC outputs are available only on certainmodels (ADuC7020, ADuC7026, ADuC7028, and ADuC7029).However, in many cases where the DAC outputs are not present,these pins can still be used as additional ADC inputs, giving amaximum of 16 ADC input channels. The ADC can operate insingle-ended or differential input mode. The ADC input voltageis 0 V to VREF. A low drift band gap reference, temperature sensor,and voltage comparator complete the ADC peripheral set.Depending on the part model, up to four buffered voltageoutput DACs are available on-chip. The DAC output range isprogrammable to one of three voltage ranges.The devices operate from an on-chip oscillator and a PLLgenerating an internal high frequency clock of 41.78 MHz(UCLK). This clock is routed through a programmable clockdivider from which the MCU core clock operating frequencyis generated. The microcontroller core is an ARM7TDMI?,16-bit/32-bit RISC machine, which offers up to 41 MIPS peakperformance. Eight kilobytes of SRAM and 62 kilobytes ofnonvolatile Flash/EE memory are provided on-chip. TheARM7TDMI core views all memory and registers as a singlelinear array.On-chip factory firmware supports in-circuit serial downloadvia the UART or I2C serial interface port; nonintrusive emulationis also supported via the JTAG interface. These features areincorporated into a low cost QuickStart? development systemsupporting this MicroConverter? family.The parts operate from 2.7 V to 3.6 V and are specified over anindustrial temperature range of ?40?C to +125?C. Whenoperating at 41.78 MHz, the power dissipation is typically120 mW. The ADuC7019 / ADuC7020 / ADuC7021 /? ADuC7022 / ADuC7024 / ADuC7025 / ADuC7026 / ADuC7027 / ADuC7028 / ADuC7029 areavailable in a variety of memory models and packages (seeOrdering Guide).APPLICATIONS Industrial control and automation systems Smart sensors, precision instrumentation Base station systems, optical networking

The ADuC832 is a complete, smart transducer front end, integrating a high performance self-calibrating multichannel 12-bit ADC, dual 12-bit DACs, and programmable 8-bit MCU on a single chip.The device operates from a 32 kHz crystal with an on-chip PLL, generating a high frequency clock of 16.78 MHz. This clock is, in turn, routed through a programmable clock divider from which the MCU core clock operating frequency is generated. The microcontroller core is an 8052 and is therefore 8051 instruction set compatible with 12 core clock periods per machine cycle. 62 kB of nonvolatile Flash/EE program memory are provided on chip. There are also 4 kB of nonvolatile Flash/EE data memory, 256 bytes of RAM, and 2 kB of extended RAM integrated on chip.The ADuC832 also incorporates additional analog functionality with two 12-bit DACs, a power supply monitor, and a band gap reference. On-chip digital peripherals include two 16-bit ?-? DACs, a dual-output 16-bit PWM, a watchdog timer, timeinterval counter, three timers/counters, Timer 3 for baud rate generation, and serial I/O ports (SPI, I2C?, and UART).Applications Optical networking?laser power control Base station systems Precision instrumentation, smart sensors Transient capture systems DAS and communications systems Upgrade to ADuC812 systems; runs from 32 kHz External crystal with on-chip PLL. Also available: ADuC831 pin-compatible upgrade to existing ADuC812 systems that require additional code or data memory; runs from 1 MHz to 16 MHz External crystal?

Demonstration circuit 2365A highlights the LTC2358 family of buffered input ADCs. The LTC2358/LTC2357/LTC2353/LTC2333 are low noise, high speed, 16-/18-bit successive approximation register (SAR) ADCs with integrated front end buffers. These ADCs accept a wide common mode range. Pico-amp inputs and high CMRR enable these ADCs to connect directly to a wide range of sensors without compromising measurement accuracy. The demo manual refers to the LTC2358-18 but applies to all parts in the family, the only differences being the number of bits, number of channels and the maximum sample rate. The LTC2358-18 has a flexible SoftSpan™ interface that allows conversion-by-conversion control of the input voltage span on a per-channel basis. An internal 2.048V reference and 2X buffer simplify basic operation while an external reference can be used to increase the input range and the SNR of the ADC.

The ADuCRF101 is a fully integrated, data acquisition solution that is designed for low power, wireless applications. It features a 12-bit analog-to-digital converter (ADC), a low power ARM Cortex?-M3 processor, a 862 MHz to 928 MHz and 431 MHz to 464 MHz RF transceiver, and Flash?/EE memory. The ADuCRF101 is packaged in a 9 mm ? 9 mm LFCSP.The data acquisition section consists of a 12-bit SAR ADC. The six inputs can be configured in single-ended or differential mode. When configured in single-ended mode, they can be used for ratiometric measurements on sensors that are powered, when required, from the internal low dropout regulator (LDO). An internal battery monitor channel and an on-chip temperature sensor are also available.This wireless data acquisition system is designed to operate in battery-powered applications where low power is critical. The device can be configured in normal operating mode or different low power modes under direct program control. In flexi mode, any peripheral can wake up the device and operate it. In hibernate mode, the internal wake-up timer remains active. In shutdown mode, only an external interrupt can wake up the device.The ADuCRF101 integrates a low power ARM Cortex-M3 processor. It is a 32-bit RISC machine, offering up to 1.25 DMIPS peak performance. The ARM Cortex-M3 processor also has a flexible 14-channel direct memory access (DMA) controller that supports communication peripherals, serial peripheral interface (SPI), UART, and I2C. Also provided on chip are 128 kB of nonvolatile Flash/EE memory and 16 kB of SRAM.A 16 MHz on-chip oscillator generates the system clock. This clock can be internally divided for the processor to operate at a lower frequency, thus saving power. A low power, internal 32 kHz oscillator is available and can be used to clock the four timers, as follows: two general-purpose timers, a wake-up timer, and a system watchdog timer.A range of communication peripherals can be configured, as required, in a specific application. These peripherals include UART, I2C, SPI, GPIO ports, PWM, and RF transceivers.The RF transceiver communicates in the 862 MHz to 928 MHz and 431 MHz to 464 MHz frequency bands using multiple configurations.On-chip factory firmware supports in-circuit serial download via the UART, and nonintrusive emulation and program download are also supported via the serial wire interface. These features are incorporated into a low cost development system supporting this precision analog microcontroller family.The ADuCRF101 operates from 2.2 V to 3.6 V and is specified over an industrial temperature range of ?40?C to +85?C. It is available in a 64-lead LFCSP packageApplications Battery powered wireless sensor Medical telemetry systems Industrial and home automation Asset tracking Security systems (access systems) Health and fitness applications??

The AD5243 and AD5248 provide a compact 3 mm ? 4.9 mmpackaged solution for dual, 256-position adjustment applications.The AD5243 performs the same electronic adjustment functionas a 3-terminal mechanical potentiometer, and the AD5248performs the same adjustment function as a 2-terminal variableresistor. Available in four end-to-end resistance values (2.5 k?,10 k?, 50 k?, and 100 k?), these low temperature coefficientdevices are ideal for high accuracy and stability-variableresistance adjustments. The wiper settings are controllablethrough the I2C-compatible digital interface. The AD5248 hasextra package address decode pins, AD0 and AD1, allowingmultiple parts to share the same I2C, 2-wire bus on a PCB. Theresistance between the wiper and either endpoint of the fixedresistor varies linearly with respect to the digital code transferred into the RDAC latch. (The terms digital potentiometer, VR,and RDAC are used interchangeably.)Operating from a 2.7 V to 5.5 V power supply and consumingless than 6 ?A allows the AD5243/AD5248 to be used inportable battery-operated applications.For applications that program the AD5243/AD5248 at thefactory, Analog Devices, Inc., offers device programmingsoftware running on Windows? NT/2000/XP operating systems.This software effectively replaces the need for external I2Ccontrollers, which in turn enhances the time to market ofsystems. An AD5243/AD5248 evaluation kit and software areavailable. The kit includes a cable and instruction manual.Applications Systems calibrations Electronics level settings Mechanical trimmers replacement in new designs Permanent factory printed circuit board (PCB) setting Transducer adjustment of pressure, temperature, position, chemical, and optical sensors RF amplifier biasing Gain control and offset adjustment

Demonstration circuit 788A is a complete constant-current, constant-voltage battery charger for one Lithium-Ion cell and featuring the LTC4061EDD. The demo board has an input voltage range of 4.3V to 8V, suitable for USB applications. Jumpers on the board allow charge currents from 50mA to 1A to be programmed and several charge termination methods to be used. Terminals are provided for adding a thermistor for sensing battery temperature, shutting down the charger, monitoring charge current and programming the minimum charge current level for termination (IDETECT). The LTC4061 features an internal P-channel power MOSFET with a unique thermal feedback loop that reduces the output current under high ambient temperature and/or high power dissipation conditions. This feature allows the charger to provide higher charge currents under normal conditions and still provide safe charging under abnormal conditions such as high ambient temperature, high input voltage or low battery voltage.

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.

The HMC6789BLC5A is a compact GaAs MMIC I/Qdownconverter in a 12-terminal, RoHS compliant,ceramic leadless chip carrier (LCC) package. Thisdevice provides a small signal conversion gain of 14 dBwith 25 dBc of image rejection. The HMC6789BLC5Autilizes a low noise amplifier to drive the I/Q mixerwhere the LO is driven by a ?2 multiplier. IF1 and IF2mixer inputs are provided and an external 90? hybridis needed to select the required sideband. The I/Qmixer topology reduces the need for filtering of theunwanted sideband. The HMC6789BLC5A is a muchsmaller alternative to hybrid style single sidebanddownconverter assemblies and it eliminates the needfor wire bonding by allowing the use of surface mountmanufacturing techniques.Applications Point-to-Point and Point-to-Multi-Point Radios Military Radar, EW & ELINT Satellite Communications Sensors

The LTM8058 is a 2kV AC isolated flyback ?Module? (power module) DC/DC converter with LDO post regulator. Included in the package are the switching controller, power switches, transformer, LDO, and all support components. Operating over an input voltage range of 3.1V to 31V, the LTM8058 supports an output voltage range of 2.5V to 13V, set by a single resistor. There is also a linear post regulator whose output voltage is adjustable from 1.2V to 12V as set by a single resistor. Only output and input capacitors are needed to finish the design. Other components may be used to control the soft-start control and biasing.The LTM8058 is packaged in a thermally enhanced, compact (9mm ? 11.25mm ? 4.92mm) overmolded ball grid array (BGA) package suitable for automated assembly by standard surface mount equipment. The LTM8058 is available with SnPb or RoHS compliant terminal finish.Applications Industrial Sensors Industrial Switches Ground Loop Mitigation