LINEAR Manuals (Industrial)

The LTC®2499 is a 16-channel (eight differential), 24-bit, No Latency DSTM ADC with Easy Drive technology and a 2-wire, I2C interface. The patented sampling scheme elimi- nates dynamic input current errors and the shortcomings of on-chip buffering through automatic cancellation of differential input current. This allows large external source impedances and rail-to-rail input signals to be directly digitized while maintaining exceptional DC accuracy. The LTC2499 includes a high accuracy, temperature sensor and an integrated oscillator. This device can be configured to measure an external signal (from combi- nations of 16 analog input channels operating in single- ended or differential modes) or its internal temperature sensor. The integrated temperature sensor offers 1/30th °C resolution and 2°C absolute accuracy. The LTC2499 allows a wide common mode input range (0V to VCC), independent of the reference voltage. Any combination of single-ended or differential inputs can be selected and the first conversion, after a new channel is selected, is valid. Access to the multiplexer output en- ables optional external amplifiers to be shared between all analog inputs and auto calibration continuously removes their associated offset and drift.

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The LTC ®1278 is a 1.6µs, 500ksps, sampling 12-bit A/D converter that draws only 75mW from a single 5V or ±5V supplies. This easy-to-use device comes complete with a 200ns sample-and-hold, a precision reference and an internally trimmed clock. Unipolar and bipolar conversion modes add to the flexibility of the ADC. The low power dissipation is made even more attractive by a 8.5mW power-down feature. Instant wake-up from shut- down allows the converter to be powered down even during brief inactive periods. The LTC1278 converts 0V to 5V unipolar inputs from a single 5V supply and ±2.5V bipolar inputs from ±5V supplies. Maximum DC specs include ±1LSB INL and ±1LSB DNL. Outstanding guaranteed AC performance includes 70dB S/(N + D) and 78dB THD at the input frequency of 100kHz over temperature. The internal clock is trimmed for 1.6µs conversion time. The clock automatically synchronizes to each sample command, eliminating problems with asynchronous clock noise found in competitive devices. A separate convert start input and a data ready signal (BUSY) ease connections to FIFOs, DSPs and microprocessors.

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LT1789-1/LT1789-10 are micropower, precision instrumentation amplifiers optimized for single supply operation from 2.2V to 36V. The quiescent current is 95μA max, the inputs common mode to ground and the output swings within 110mV of ground. The gain is set with a single external resistor for a gain range of 1 to 1000 for the LT1789-1 and 10 to 1000 for the LT1789-10. The high accuracy of the LT1789-1 (40ppm maximum non-linearity and 0.25% max gain error) is unmatched by other micropower instrumentation amplifiers. The LT1789-10 maximizes both the input common mode range and dynamic output range when an amplification of 10 or greater is required, allowing precise signal processing where other instrumentation amplifiers fail to operate. The LT1789-1/LT1789-10 are laser trimmed for very low input offset voltage, low input offset voltage drift, high CMRR and high PSRR. The output can handle capacitive loads up to 400pF (LT1789-1), 1000pF (LT1789-10) in any gain configuration while the inputs are ESD protected up to 10kV (human body). The LT1789-1/LT1789-10 are offered in the 8-pin SO package, requiring significantly less PC board area than discrete multi op amp and resistor designs.

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The LT3570 is a 1.5A buck converter, a 1.5A boost converter and an LDO controller, integrating power switches and LDO controllers. Each converter has a 1.5A current limit and an input range of 2.5V to 36V, making LT3570 ideal for a wide range of applications. Switching frequencies up to 2MHz are programmed with an external timing resistor and the oscillator can be synchronized to an external clock up to 2.75MHz. The LT3570 features a programmable soft-start function that limits the feedback voltage during start-up helping prevent overshoot and limiting inrush current. The LDO controller is capable of delivering up to 10mA of base current to an external NPN transistor.

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The LTC1391 is a high performance CMOS 8-channel analog multiplexer with a cascading serial interface, allowing multiple LTC1391s to be connected together to increase the number of MUX channels using a single digital port.

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This datasheet provides typical application features of LTC2453, including input offset error (INL) and temperature range.

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The LTC1174 is a high efficiency step-down and inverting DC/DC converter from LTC company. It has a maximum output current of 340mA or 600mA and can operate in a wide VIN range of 4V to 18.5V with up to 94% efficiency.

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LTM4601/LTM4601-1 is a 12A DC/DC µModules with PLL, output tracking, and margining. It is suitable for telecom and networking equipment, servers, industrial equipment, point of load regulation, and complete switch mode power supply. It features a wide input voltage range, parallel multiple µModules for current sharing, differential remote sensing, PLL frequency synchronization, ±1.5% regulation, and current foldback protection.

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The LT1167 is a low power, precision instrumentation amplifier that requires only one external resistor to set gains of 1 to 10,000

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The LT ®1946A is a fixed frequency step-up DC/DC converter containing an internal 1.5A, 36V switch. Capable of generating 12V at 430mA from a 5V input, the LT1946A is ideal for powering large TFT-LCD panels. The LT1946A switches at 2.7MHz, allowing the use of tiny, low profile inductors and low value ceramic capacitors. Loop com- pensation can be either internal or external, giving the user flexibility in setting loop compensation and allowing opti- mized transient response with low ESR ceramic output capacitors. Soft-start is controlled with an external capaci- tor which determines the input current ramp rate during start up. The 8-lead MSOP package and high switching frequency ensure a low profile overall solution less than 1.1mm high.

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Micropower Precision Triple Supply Monitors in 8-Lead MSOP and 5-Lead SOT-23 Packages，can simultaneously monitor three input ports, 1.5% accuracy ensures reliable reset operation, low power consumption, very suitable for power-sensitive systems.

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The LT ®3710 is a high efficiency step-down switching regulator intended for auxiliary outputs in single secondary winding, multiple output power supplies. The LT3710 drives dual synchronous N-channel MOSFETs and achieves high efficiency. With leading edge modulation, it operates well with either primary side peak current or voltage mode control. It is synchronized to the falling edge of the transformer secondary winding and can be used in both single-ended and double-ended isolated power converter topologies. A high speed operational amplifier is incorporated to achieve optimum compensation and fast transient response. A user selectable discontinuous conduction mode improves light load efficiency. The LT3710 is available in a thermally enhanced TSSOP-16 exposed pad power package.

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LTC3732 is a synchronous step-down switching regulator controller that drives all N-channel external power MOSFET stages in a phase-lockable fixed frequency architecture.

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LT1614 is a switching regulator chip launched by Linear Technology. It uses a fixed frequency of inverted mode and works with an input voltage of 1V-5V. The output voltage range is -24V-5V and the output current is 200mA.

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The LT3150 3150f is a fast transient response, low input voltage, very low dropout linear regulator controller that provides 1.8V to 1.5V, 4A of very low dropout linear regulation (typical dropout voltage = 65mV at IOUT = 4A).

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LT1930/LT1930A are 1A, 1.2MHz/2.2MHz step-up DC/DC converters with features such as low VCESAT switch, high output voltage, wide input range, low shutdown current, etc. They are suitable for applications such as TFT-LCD bias supply, digital cameras, cordless phones, battery backup, medical diagnostic equipment, etc.

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The LTC3576/LTC3576-1 are highly integrated power management and battery charger ICs for Li-Ion/Polymer battery applications. They each include a high efficiency power path manager with overvoltage protection and three-level step-down regulators.

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