DC1620A-S: Demo Board for LTC2188 16-Bit, 20Msps Low Power Dual ADC.

The LTC4227 offers ideal diode-OR and Hot Swap? functions for two power rails by controlling external Nchannel MOSFETs. MOSFETs acting as ideal diodes replace two high power Schottky diodes and the associated heat sinks, saving power and board area. A Hot Swap control MOSFET allows a board to be safely inserted and removed from a live backplane by limiting inrush current. The supply output is also protected against short-circuit faults with a fast acting current limit and internal timed circuit breaker.The LTC4227 regulates the forward voltage drop across the MOSFETs to ensure smooth current transfer from one supply to the other without oscillation. The ideal diodes turn on quickly to reduce the load voltage droop during supply switchover. If the input supply fails or is shorted, a fast turn-off minimizes reverse-current transients.The LTC4227 allows turn-on/off control, and reports fault and power good status for the supply. Part Overcurrent Fault Start-Up Delay LTC4227-1 Latch Off 100ms LTC4227-2 Retry 100ms LTC4227-3 Latch Off 1.6ms LTC4227-4 Retry 1.6ms Applications Redundant Power Supplies and Supply Holdup Computer Systems and Servers Telecom Networks

Demonstration circuit DC1641 is DC/DC boost converter featuring the LTC3786 constant frequency current mode boost controller. The DC1641A operates over 5V to 24V input and provides over 5A at 6V input voltage and over 9A of output current at 10V input as shown in figure 3. The 350kHz constant frequency operation results in small and efficient circuit. The converter provides high output voltage accuracy (typically ±3%) over wide load range with no minimum load requirement. The demonstration circuit can be easily modified to generate different output voltages.

Demonstration circuit DC1666A is a synchronous four-switch buck-boost LED driver controller. It accepts an input voltage from 4.7V to 60V, and drives up to 25V of LEDs at 2A. DC1666A features both PWM and analog dimming of the LED string. It has an OPENLED flag that indicates when the LED string has been removed and it has a SHORTLED flag that indicates that the output has been shorted to GND. In both cases, the IC remains in control and well protected.

The LTC5584 is a direct conversion quadrature demodulator optimized for high linearity receiver applications in the 30MHz to 1.4GHz frequency range. It is also usable in the 10MHz to 30MHz and 1.4GHz to 2GHz ranges with reduced performance. It is suitable for communications receivers where an RF signal is directly converted into I and Q baseband signals with bandwidth of 530MHz or higher. The LTC5584 incorporates balanced I and Q mixers, LO buffer amplifiers and a precision, high frequency quadrature phase shifter. In addition, the LTC5584 provides four analog control voltage interface pins for IIP2 and DC offset correction, greatly simplifying system calibration.The high linearity of the LTC5584 provides excellent spurfree dynamic range for the receiver. This direct conversion demodulator can eliminate the need for intermediate frequency (IF) signal processing, as well as the corresponding requirements for image filtering and IF filtering. These I/Q outputs can interface directly to channel-select filters (LPFs) or to baseband amplifiers.Applications LTE/W-CDMA/TD-SCDMA Base Station Receivers Wideband DPD Receivers Point-To-Point Broadband Radios High Linearity Direct Conversion I/Q Receivers Image Rejection Receivers

The LTC2758 is a dual 18-bit multiplying serial-input, current-output digital-to-analog converter. LTC2758A provides full 18-bit performance (INL and DNL of ?1LSB maximum) over temperature without any adjustments. 18-bit monotonicity is guaranteed in all performance grades. This SoftSpan? DAC operates from a single 3V to 5V supply and offers six output ranges (up to ?10V) that can be programmed through the 3-wire SPI serial interface or pin-strapped for operation in a single range.Any on-chip register (including DAC output-range settings) can be read for verification in just one instruction cycle; and if you change register content, the altered register will be automatically read back during the next instruction cycle.Voltage-controlled offset and gain adjustments are also provided; and the power-on reset circuit and CLR pin both reset the DAC outputs to 0V regardless of output range.Applications Instrumentation Medical Devices Automatic Test Equipment Process Control and Industrial Automation

The LTC2752 is a dual 16-bit multiplying serial-input, current-output digital-to-analog converter. It operates from a single 3V to 5V supply and is guaranteed monotonic over temperature. The LTC2752A provides full 16-bit performance (?1LSB INL and DNL, max) over temperature without any adjustments. This SoftSpan? DAC offers six output ranges (up to ?10V) that can be programmed through the 3-wire SPI serial interface, or pinstrapped for operation in a single range. Any on-chip register (including DAC output-range settings) can be read for verification in just one instruction cycle; and if you change register content, the altered register will be automatically read back during the next instruction cycle. Voltage-controlled offset and gain adjustments are also provided; and the power-on reset circuit and CLR pin both reset the DAC outputs to 0V regardless of output range.Applications High Resolution Offset and Gain Adjustment Process Control and Industrial Automation Automatic Test Equipment Data Acquisition Systems

The LTM8047 is an isolated flyback ?Module DC/DC converter. The LTM8047 has an isolation rating of 725VDC. For a similar product with LDO post regulator, see the LTM8048. Included in the package are the switching controller, power switches, transformer, and all support components. Operating over an input voltage range of 3.1V to 32V, the LTM8047 supports an output voltage range of 2.5V to 12V, set by a single resistor. Only output, input, and bypass capacitors are needed to finish the design. Other components may be used to control the soft-start control and biasing.The LTM8047 is packaged in a thermally enhanced, compact (11.25mm ? 9mm ? 4.92mm) over-molded ball grid array (BGA) package suitable for automated assembly by standard surface mount equipment. The LTM8047 is available with SnPb (BGA) or RoHS compliant terminal finish.Applications Industrial Sensors Industrial Switches Ground Loop Mitigation

Demonstration circuit 1697A features the LTC2945. The LTC2945 is a rail-to-rail system monitor that measures current, voltage, and power. It features an operating range of 2.7V to 80V and includes a shunt regulator for supplies above 80V to allow flexibility in the selection of input supply. The current common mode measurement range of 0V to 80V is independent of the input supply. An onboard 0.75% accurate 12-bit ADC measures load current, input voltage and an auxiliary external voltage. A 24-bit power value is generated by digitally multiplying the measured 12-bit load current and input voltage data. Minimum and maximum values are stored and an overrange alert with programmable thresholds minimizes the need for software polling. Data is reported via a standard I2C interface. The demo board is populated for a 5A application. This can be changed by populating R1 accordingly.

The LT1999 is a high speed precision current sense amplifier, designed to monitor bidirectional currents over a wide common mode range. The LT1999 is offered in three gain options: 10V/V, 20V/V, and 50V/V.The LT1999 senses current via an external resistive shunt and generates an output voltage, indicating both magnitude and direction of the sensed current. The output voltage is referenced halfway between the supply voltage and ground, or an external voltage can be used to set the reference level. With a 2MHz bandwidth and a common mode input range of ?5V to 80V, the LT1999 is suitable for monitoring currents in H-Bridge motor controls, switching power supplies, solenoid currents, and battery charge currents from full charge to depletion.The LT1999 operates from an independent 5V supply and draws 1.55mA. A shutdown mode is provided for minimizing power consumption.The LT1999 is available in an 8-lead SOP, an 8-lead MSOP (original pinout), or an 8-lead pinout option engineered for FMEA.Applications High Side or Low Side Current Sensing H-Bridge Motor Control Solenoid Current Sense High Voltage Data Acquisition PWM Control Loops Fuse/MOSFET Monitoring

The LT1999 is a high speed precision current sense amplifier, designed to monitor bidirectional currents over a wide common mode range. The LT1999 is offered in three gain options: 10V/V, 20V/V, and 50V/V.The LT1999 senses current via an external resistive shunt and generates an output voltage, indicating both magnitude and direction of the sensed current. The output voltage is referenced halfway between the supply voltage and ground, or an external voltage can be used to set the reference level. With a 2MHz bandwidth and a common mode input range of ?5V to 80V, the LT1999 is suitable for monitoring currents in H-Bridge motor controls, switching power supplies, solenoid currents, and battery charge currents from full charge to depletion.The LT1999 operates from an independent 5V supply and draws 1.55mA. A shutdown mode is provided for minimizing power consumption.The LT1999 is available in an 8-lead SOP, an 8-lead MSOP (original pinout), or an 8-lead pinout option engineered for FMEA.Applications High Side or Low Side Current Sensing H-Bridge Motor Control Solenoid Current Sense High Voltage Data Acquisition PWM Control Loops Fuse/MOSFET Monitoring

Demonstration Circuit DC1702A is a Li-Ion/Polymer Shunt Battery Charger system with Low Battery Disconnect featuring the LTC4071EDDB. The LTC4071 allows simple charging of Li-Ion/Polymer batteries from very low current, intermittent or continuous charging sources. The DC1702 provides up to 50mA of output current at 4.1V from a 10V to 16V input supply. A near-zero current low battery latching disconnect function protects even the lowest capacity batteries from deep discharge and potentially irreparable damage. The 550nA to 50mA operating current makes charging possible from previously unusable sources. With its low operating current the LTC4071 is well suited to charge low capacity Li-Ion or thin film batteries in energy harvesting applications.

Demonstration circuit 1703A features the LTC2655 quad 16-/12-bit DAC. The LTC2655 is a family of 16-/12- bit rail-to-rail DACs with integrated 10ppm/°C maximum reference. The LTC2655 advances performance standards for output drive, crosstalk and load regulation in single supply, voltage-output multiple DACs.

The LTC4280 Hot Swap? controller allows a board to be safely inserted and removed from a live backplane. Using an external N-channel pass transistor, board supply voltage and inrush current are ramped up at an adjustable rate. An I2C interface and onboard ADC allow for monitoring of load current, voltage and fault status.The device features adjustable analog foldback current limit and a FILTER pin which configures the time spent in overcurrent before declaring a fault. An I2C interface may configure the part to latch off or automatically restart after the LTC4280 detects a current limit fault.The controller has additional features to interrupt the host when a fault has occurred, notify when output power is good, detect insertion of a load card, and power-up either automatically upon insertion or wait for an I2C command to turn on.Applications Live Board Insertion Electronic Circuit Breakers Computers, Servers Platform Management

Demonstration circuit 1707 is a high efficiency monolithic step-down DC/DC switching regulator designed for double-data-rate (DDR) memory termination in computer systems. The VTT output is capable of sourcing and sinking up to 6A with an output voltage equal to one-half the voltage applied to the VDDQIN terminal or one-half the input supply voltage, selected by a jumper. An additional low current output (VTTR) also equal to one-half the voltage on VDDQIN can source and sink up to 10mA. Input voltage range is from 2.25V to 5.5V with overvoltage protection for transients exceeding 6.5V.

DC1724A is a μModule® step-down converter, featuring the LTM8029, which consumes only 5μA of quiescent current. The demo circuit is designed for a 5V, 600mA output at an operating frequency of 600kHz. The input voltage range is from 5.6V to 36V. If the input voltage decreases towards the programmed output voltage, the LT3973 will start to skip switch-off times and decrease the switching frequency to maintain output regulation up to a maximum duty cycle of approximately 97.5%.

Demonstration circuit 1725A features LT3759 in a 485kHz boost converter, designed for a 5V/2A output from a 1.8V to 4.5V input. The LT3759 is a current mode DC/DC Boost/SEPIC/Inverting controller operating over an input range of 1.6V to 42V. Thanks to a novel FBX pin architecture, the LT3759 allows both positive and negative output feedback voltages.

The LT3641 is a dual channel, current mode monolithic buck switching regulator with a power-on reset and a watchdog timer. Both regulators are synchronized to a single oscillator with an adjustable frequency (350kHz to 2.5MHz). At light loads, both regulators operate in low ripple Burst Mode? to maintain high effi ciency and low output ripple.The high voltage channel is a nonsynchronous buck with an internal 2.4A top switch that operates from an input of 4V to 42V and input transient protection to 55V. The low voltage channel operates from an input of 2.5V to 5.5V. Internal synchronous power switches provide high effi ciency without the need of external Schottky diode. Both channels have cycle-by-cycle current limit, providing protection against shorted outputs.The power-on reset and watchdog timeout periods are both adjustable using external capacitors. The window mode watchdog timer fl ags when the ?P pulses group too close together or too far apart.The LT3641 is available in a 28-pin 4mm ? 5mm QFN package and 28-pin TSSOP package. Both packages have an exposed pad for low thermal resistance.Applications Industrial Power Supplies Automotive Electronic Control Units

Demonstration circuit 1739A-B is a 150W isolated forward converter with synchronous rectification featuring the LTC3765/LTC3766. This circuit demonstrates a high level of performance, efficiency, and small solution size attainable using these parts in an active-clamp-reset forward converter power supply. It operates at 240kHz and produces a regulated 12V, 12.5A output from an input voltage range of 18V to 72V, making it well suited for telecom, industrial, and other applications.

The LT1533 is a new class of switching regulator designed to reduce conducted and radiated electromagnetic interference (EMI). Ultralow noise and EMI are achieved by providing user control of the output switch slew rates. Voltage and current slew rates can be independently programmed to optimize switcher harmonic content versus efficiency. The LT1533 can reduce high frequency harmonic power by as much as 40dB with only minor losses in efficiency. The LT1533 utilizes a dual output switch current mode architecture optimized for low noise topologies. The IC includes two 1A power switches along with all necessary oscillator, control and protection circuitry. Unique error amp circuitry can regulate both positive and negative voltages. The internal oscillator may be synchronized to an external clock for more accurate placement of switching harmonics. Protection features include cycle by cycle current limit protection, undervoltage lockout and thermal shutdown. Low minimum supply voltage and low supply current during shutdown make the LT1533 well suited for portable applications. The part may also be forced into a 50% duty cycle mode for unregulated applications. The LT1533 is available in the 16-pin narrow SO package.Applications Precision Instrumentation Systems Isolated Supplies for Industrial Automation Medical Instruments Wireless Communications Single Board Data Acquisition Systems