LINEAR Manuals (Industrial)

The LTC1594L/LTC1598L are 3V micropower, 12-bit sampling A/D converters that feature 4- and 8-channel multiplexers, respectively. They typically draw only 160µA of supply current when converting and automatically power down to a typical supply current of 1nA between conversions. The LTC1594L is available in a 16-pin SO package and the LTC1598L is packaged in a 24-pin SSOP. Both operate on a 3V supply. The 12-bit, switched-capacitor, successive approximation ADCs include a sample-and-hold. On-chip serial ports allow efficient data transfer to a wide range of microprocessors and microcontrollers over three or four wires. This, coupled with micropower consumption, makes remote location possible and facilitates transmitting data through isolation barriers. The circuit can be used in ratiometric applications or with an external reference. The high impedance analog inputs and the ability to operate with reduced spans (to 1.5V full scale) allow direct connection to sensors and transducers in many applications, eliminating the need for gain stages.

File format: PDF Size:355 KB

The LT ®1506 is a 500kHz monolithic buck mode switching regulator functionally identical to the LT1374 but optimized for lower input voltage applications. It will operate over a 4V to 15V input range compared with 5.5V to 25V for the LT1374. A 4.5A switch is included on the die along with all the necessary oscillator, control and logic circuitry. High switching frequency allows a considerable reduction in the size of external components. The topology is current mode for fast transient response and good loop stability. Both fixed output voltage and adjustable parts are available. A special high speed bipolar process and new design tech- niques achieve high efficiency at high switching frequency. Efficiency is maintained over a wide output current range by keeping quiescent supply current to 4mA and by utiliz- ing a supply boost capacitor to saturate the power switch. The LT1506 fits into standard 7-pin DD and fused lead SO-8 packages. Full cycle-by-cycle short-circuit protection and thermal shutdown are provided. Standard surface mount external parts are used, including the inductor and capacitors. There is the optional function of shutdown or synchronization.

File format: PDF Size:296 KB

This document introduces the features and characteristics of the LT1086 series products, including adjustable or fixed 3.3V, 3.6V, 5V, 12V output voltage, 1.5A output current, 1V input-output differential, guaranteed voltage drop at multiple current levels, 0.015% line regulation, 0.1% load regulation, 100% thermal limit functional test, >75dB ripple rejection.

File format: PDF Size:217 KB

The LT1991 is a low-power, high-precision operational amplifier with adjustable gain that is suitable for use in differential amplifier circuits. The device is available in a 10-lead MSOP and a low profile (0.8mm) 3mm x 3mm DFN package.

File format: PDF Size:291 KB

This document introduces the features and characteristics of LTC2401/LTC2402 1-/2-Channel 24-Bit µPower No Latency ∆ΣTMADCs in MSOP-10.

File format: PDF Size:351 KB

The LTC2482 is a high-precision, low-power, high-speed 16-bit single-channel analog-to-digital converter that utilizes the No Latency ∆Σ architecture and Easy Drive technology to achieve true latency-free operation. It also features single-supply operation, fully differential inputs, an internal oscillator, and a 10-pin DFN package

File format: PDF Size:397 KB

The LTC2440 is a high speed 24-bit No Latency Δ∑TM ADC with 5ppm INL and 5μV offset. It uses proprietary delta-sigma architecture enabling variable speed and resolution with no latency. Ten speed/resolution combinations (6.9Hz/200nVRMS to 3.5kHz/25μVRMS) are programmed through a simple serial interface. Alternatively, by tying a single pin HIGH or LOW, a fast (880Hz/2μVRMS) or ultralow noise (6.9Hz, 200nVRMS, 50/60Hz rejection) speed/resolution combination can be easily selected.

File format: PDF Size:313 KB

The LTC2440 is a high speed 24-bit No Latency Δ∑TM ADC with 5ppm INL and 5µV offset. It uses proprietary delta-sigma architecture enabling variable speed and reso- lution with no latency.

File format: PDF Size:313 KB

The LTC3802 is a dual switching regulator controller optimized for high efficiency step-down conversion from input voltages between 3V to 30V. The controller uses a leading edge modulation scheme to allow extremely low duty cycle operation. The constant frequency voltage mode controller allows a phase-lockable frequency between 330kHz and 750kHz. Power loss and noise due to the ESR of the input capacitors are minimized by operating the two controller output stages 180° out-of-phase.

File format: PDF Size:347 KB

The LT4220 is a dual voltage hot swap controller from Linear Technology Corporation that supports positive and negative two-way power, has overcurrent limiting, power tracking, and switch tube shutdown functions, and is used in RAID systems, –5.2V ECL power supplies, industrial controls, and other scenarios.

File format: PDF Size:255 KB

LTC3830/LTC3830-1 3830fa high power step-down synchronous DC/DC controllers for low voltage operation

File format: PDF Size:267 KB

The LTC®3441 is a high efficiency, fixed frequency, buck-boost DC/DC converter that operates efficiently from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides a continuous trans- fer function through all operating modes, making the prod- uct ideal for single lithium ion or multicell applications where the output voltage is within the battery voltage range. The device includes two 0.10Ω N-channel MOSFET switches and two 0.11Ω P-channel switches. External Schottky diodes are optional, and can be used for a moderate efficiency improvement. The operating frequen- cy is 1MHz, and can be synchronized via external components. The device features a ≤25µA quiescent current, which allows true output disconnect in standby mode. The device is available in a thermally enhanced 12-lead (4mm × 3mm) DFN package.

File format: PDF Size:191 KB

The LTC3727/LTC3727-1 are high efficiency dual 12V/5V step-down converters with features including wide output voltage range, out-of-phase controllers, OPTI-LOOP compensation, output voltage accuracy, and power good output voltage monitor.

File format: PDF Size:429 KB

The LTC1415 is a 1.25MSPS, 12-bit sampling ADC that draws only 55mW from a single 5V supply and can operate with external or internal reference.

File format: PDF Size:326 KB

The LTC4098 is a high efficiency USB PowerPathTM controller and full-featured Li-Ion/Polymer battery charger. It seamlessly manages power distribution from multiple sources including USB, wall adapter, automotive, firewire or other high voltage DC/DC converters, and a Li-Ion/Polymer battery. The LTC4098’s internal switching regulator automatically limits its input current for USB compatibility. For automotive and other high voltage applications, the LTC4098 interfaces with a Linear Technology external switching regulator to provide a high efficiency high voltage power path. Both the USB and the optional high voltage inputs feature Bat-Track optimized charging to provide maximum power to the application and ease thermal issues in high power density applications with input supplies from 5V to as high as 38V. An overvoltage circuit protects the LTC4098 from high voltage damage on the USB/Wall adaptor inputs with an N-channel FET and a resistor. The LTC4098 is available in the ultra-thin (0.55mm) 20-Lead 3mm × 4mm QFN surface mount package.

File format: PDF Size:408 KB

The LTC®3808 is a synchronous step-down switching regulator controller that drives external complementary power MOSFETs using few external components. The constant frequency current mode architecture with MOSFET VDS sensing eliminates the need for a current sense resistor and improves efficiency. By employing Spread Spectrum modulation technology, the device achieves low noise over a wide input voltage range.

File format: PDF Size:373 KB

The LTC1704/LTC1704B is a high power synchronous switching regulator controller with high efficiency and low power consumption, suitable for a variety of applications.

File format: PDF Size:344 KB

The LTC1257 is a complete single supply, 12-bit voltage output digital-to-analog converter (DAC) in an SO-8 package. It includes an output buffer amplifier, 2.048V voltage reference, and an easy to use three-wire cascadable serial interface. It is suitable for industrial process control and automatic test equipment. The LTC1257 features small size, low power consumption, and other characteristics.

File format: PDF Size:138 KB

The document mainly introduces the LTC3832/LTC3832-1 series products. The series products are high power and high efficiency switching regulator controllers, which can be used for 3.3V-5V to 0.6V-3.xV step-down applications. The series products have ±1% output voltage regulation accuracy and can maintain stability under temperature, load current and input voltage changes. The efficiency is up to 95%. It can provide adjustable or fixed 2.5V output.

File format: PDF Size:317 KB

The LTC1255 is a dual 24V high-side MOSFET driver that allows using low cost N-channel FETs for high-side industrial and automotive switching applications. An internal charge pump boosts the gate drive voltage above the positive rail, fully enhancing an N-channel MOS switch with no external components. Low power operation, with 12µA standby current, allows use in virtually all systems with maximum efficiency. Included on-chip is independent overcurrent sensing to provide automatic shutdown in case of short circuits. A time delay can be added to the current sense to prevent false triggering on high in-rush current loads. The LTC1255 operates from 9V to 24V supplies and is well suited for industrial and automotive applications. The LTC1255 is available in both an 8-pin DIP and an 8-pin SOIC.

File format: PDF Size:283 KB