LINEAR Manuals

LTC1285/LTC1288 3V micropower sampling 12-bit A/D converters in SO-8 packages

The LTC4307 is a low offset hot swappable 2-wire bus buffer that allows I/O card insertion into a live backplane without corruption of the data and clock busses. It provides bidirectional buffering, keeping the backplane and card capacitances isolated. The LTC4307 has low offset and high VOL tolerance, allowing multiple devices to be cascaded on the clock and data busses. If SDAOUT or SCLOUT are low for 30ms, the LTC4307 will automatically break the bus connection and generate clock pulses to attempt to free the bus. The connection will resume if the stuck bus is cleared. During insertion, the SDA and SCL lines are pre-charged to 1V to minimize bus disturbances. The ENABLE input allows the LTC4307 to connect after a stop bit or bus idle. Driving ENABLE low breaks the connection between SDAIN and SDAOUT, SCLIN and SCLOUT. The READY output indicates that the backplane and card sides are connected.

The LTC4309 is a hot-swappable 2-wire bus buffer that allows I/O card insertion into a live backplane without corruption of the data and clock buses. It provides bidirectional buffering, keeping the backplane and card capacitances isolated. Low offset and high VOL tolerance allow cascading of multiple devices on the clock and data buses. If SDAOUT or SCLOUT are low for 30ms, FAULT will pull low indicating a stuck bus low condition. If DISCEN is tied high, the LTC4309 will automatically break the bus connection and generate up to 16 clock pulses and a stop bit in an attempt to free the bus. A connection will resume if the stuck bus is cleared. If DISCEN is connected to GND, the buses will remain connected with no clock or stop bit generation. ACC input enables rise-time accelerators for high capacitively loaded buses. During insertion, the SDA and SCL lines are precharged to 1V to minimize bus disturbances. When driven high, the ENABLE input allows the LTC4309 to connect after a stop bit or bus idle. Driving ENABLE low breaks the connection between SDAIN and SDAOUT, SCLIN and SCLOUT. READY is an open drain output which indicates that the backplane and card sides are connected.

The LTC1407-1/LTC1407A-1 are 12-bit/14-bit, 3Msps ADCs with shutdown feature.

The LTC1293/4/6 is a family of data acquisition systems which contain a serial I/O successive approximation A/D converter. It uses LTCMOS TM switched capacitor technology to perform either 12-bit unipolar, or 11-bit plus sign bipolar A/D conversions. The input multiplexer can be configured for either single ended or differential inputs (or combinations thereof). An on-chip sample and hold is included for all single ended input channels. When the LTC1293/4/6 is idle it can be powered down in applications where low power consumption is desired. The LTC1296 includes a System Shutdown Output pin which can be used to power down external circuitry, such as signal conditioning circuitry prior to the input mux. The serial I/O is designed to communicate without external hardware to most MPU serial ports and all MPU parallel I/O ports allowing up to eight channels of data to be transmitted over as few as three wires.

The LTC ®1407/LTC1407A are 12-bit/14-bit, 3Msps ADCs with two 1.5Msps simultaneously sampled differential inputs

The LTC1625 is a synchronous step-down switching regulator controller that drives external N-Channel power MOSFETs using few external components. Current mode control with MOSFET VDS sensing eliminates the need for a sense resistor and improves efficiency. The frequency of a nominal 150kHz internal oscillator can be synchronized to an external clock over a 1.5:1 frequency range. Burst Mode operation at low load currents reduces switching losses and low dropout operation extends operating time in battery-powered systems. A forced continuous mode control pin can assist secondary winding regulation by disabling Burst Mode operation when the main output is lightly loaded. Fault protection is provided by foldback current limiting and an output overvoltage comparator. The LTC1625 is available in 16-Lead Narrow SSOP and SO Packages.

LTC1775 is a high power no RSENSETM current mode synchronous step-down switching regulator, which has the highest efficiency current mode controller, no need for sense resistor, maximum current sense voltage of 300mV, stable high current operation, dual N-channel MOSFET synchronous drive, wide VIN range: 4V to 36V, wide VOUT range: 1.19V to VIN, ±1% 1.19V reference, programmable fixed frequency with injection lock, very low dropout operation: 99% duty cycle, forced continuous mode control pin, optional programmable soft start, pin selectable output voltage, foldback current limit, output overvoltage protection, logic controlled micropower shutdown: IQ < 30µA, available in 16-lead narrow SSOP and SO packages.

The LT ®3468/LT3468-1/LT3468-2 are highly integrated ICs designed to charge photoflash capacitors in digital and film cameras.

The document describes the features of the LT1248 power factor controller in detail, including high power factor, wide load range, international operation, and no switches.

1 LT1579 300mA Dual Input Smart Battery Backup Regulator Daisy-Chained Control Outputs

The LT5522 is an active downconverting mixer optimized for high linearity downconverter applications. It features an internal on-chip RF input transformer, 50Ω single-ended RF and LO ports, high input IP3, low power consumption, etc.

This datasheet introduces the features and characteristics of the low power, broadband down converting mixer LT5525, including frequency range, input IP3, conversion gain, LO-RF and LO-IF isolation, SSB noise figure, single-ended 50Ω RF and LO interface, integrated LO buffer, supply current, enable function, and package