LINEAR Manuals

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This document introduces the LTC2941/LTC2942 coulomb counters, which are used for accurate lithium battery gauging. The counters use continuous-time analog integrators, resulting in minimal offset and gain errors, and better overall charge accuracy. The bidirectional analog integrator accommodates both battery charge and discharge, and a programmable prescaler allows for a wide range of battery capacities. The LTC2942 also incorporates a 14-bit ∆∑ ADC to measure battery voltage and die temperature. The LTC2941-1 and LTC2942-1 also integrate a 50mΩ sense resistor to provide up to ±1A measurement range. Charge, voltage* and temperature* are all communicated to the host system over an I2C/SMBus compatible interface.

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This document describes a MOSFET circuit with a small footprint and low resistance. It has a wide operating voltage range and features adjustable current limit, temperature monitoring, overtemperature protection, and overcurrent protection.

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The LTC2383-16 is a 1Msps, no latency SAR ADC that offers low 13mW power consumption, 92dB SNR using a fully differential input range, ±2LSB INL (max) and 16-bit no missing codes resolution. The pin- and software-compatible family includes LTC2382-16 (500ksps) and LTC2381-16 (250ksps) and features a proprietary sampling architecture that allows the use of extremely low power ADC drivers, thus reducing the overall power consumption of the entire data acquisition solution. To achieve uncompromised AC performance, we recommend the fast settling LT®6350 ADC driver for single-ended to differential conversion of input signals. We also recommend the LTC6652-2.5, a precision external reference with high accuracy, low power and small size. The –40°C to 125°C temperature range of LT6350 and LTC6652 complements that of LTC2383 family and makes them ideal for automotive applications.

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LTC2351/2356 family of SAR ADCs are low-power, low-cost, high-performance ADCs.

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The document is about LTC3675 power management chip. The chip is a highly integrated general-purpose power management solution for high power single cell lithium-ion/polymer systems. It features seven independent rails plus LED driver, with I2C control, flexible sequencing and fault monitoring in a compact 28mm2 QFN package.

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The LTC2990 is a temperature, voltage and current monitor for 3V to 5.5V systems which integrates a 14-bit ADC, 10ppm/°C reference and I2C interface to provide submillivolt voltage resolution, as well as accuracy of ±1°C internally and ±0.5°C remotely when making temperature measurements. Unlike traditional temperature monitors that rely on single-ended inputs for measurements, the LTC2990 uses four differential inputs to measure multiple parameters simultaneously.

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The LT3748 is a high input voltage isolated flyback DC/DC controller that does not require an opto-isolator, third winding or signal transformer for feedback. The output voltage is sensed from the primary-side flyback signal, and is set with two external resistors and the transformer turns ratio. The LT3748 operates over a 5V to 100V input voltage range, drives an external N-channel power MOSFET and maintains better than ±5% overall regulation.

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The LTC2379-18 is a 18-bit 1.6Msps SAR ADC with 101dB SNR and ±VREF full differential input range. It features a digital gain compression feature that eliminates the need for a negative ADC driver supply while preserving the ADC's full resolution, dramatically lowering the total power consumption of the signal chain.

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This datasheet provides detailed information on Linear Technology's high precision, high speed, low noise differential amplifiers/ADC drivers.

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The LTM9004 and LTM9005 are highly integrated RF-to-digital receivers that combine direct conversion and IF sampling architectures with integrated RF, signal filtering, gain stages and high-speed ADCs for more compact, low power designs and dramatically faster time-to-market.

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The LTC®3880 is a power system manager featuring a dual output synchronous step-down DC/DC controller with digital telemetry and is fully programmable via an I2C-based PMBus compliant serial interface. This device combines an onboard EEPROM, best in class analog switching regulator performance with precision mixed signal data conversion for ease of power system design.

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Linear Technology's silicon oscillators offer advantages over traditional crystal-based clocks in systems subject to shock, vibration, acceleration, or temperature extremes. They are made using standard silicon fabrication and assembly techniques, eliminating the need for crystals, timing capacitors, and long lead times. With fast start-up, low power consumption, small size, and on-the-fly frequency programmability, they are suitable for almost any application.

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This document introduces the use of Linear Technology data converters and other mixed signal solutions with the Freescale Tower System. The system features an easy-to-use plug-in analog module that can be controlled by any Freescale Tower processor module with an SPI interface. The QuikEval™ interface on the analog module allows connection of more than 130 Linear Technology evaluation boards for a broad range of applications. The module includes features such as digital-to-analog converters (DACs), analog-to-digital converters (ADCs), voltage regulator, voltage reference, and more.

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This datasheet introduces the LTC2256-14/12 family of 14/12-bit, 25Msps to 150Msps ADCs. The family features a single 1.8V supply, flexible digital interface (CMOS, DDR CMOS, or DDR LVDS), selectable input ranges (1VP-P to 2VP-P), 800MHz full-power bandwidth S/H, optional data output randomizer, alternate bit polarity mode, optional clock duty cycle stabilizer, shutdown and nap modes, and serial SPI port for configuration.

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The LTC®3833 is a high step-down DC/DC buck controller that operates up to 2MHz and provides a tightly regulated output. It is ideal for automotive applications where high switching frequencies are required to prevent interference to noise-sensitive circuitry.

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The LTC®4000 is a high voltage controller and power manager which, when paired with a DC/DC converter, becomes a full-featured battery charger solution. The LTC4000 is capable of driving virtually any topology, including buck, boost, buck-boost, SEPIC and flyback converters. Its intelligent PowerPath manager provides power to the system load when input power is available, enabling instant-on operation even with a deeply discharged battery. A full-featured controller, the LTC4000 can charge a variety of battery types including lithium, nickel and lead acid-based chemistries. Highly accurate charge current and float voltage, as well as onboard termination, ensure safe and accurate charging.

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