National Manuals (Industrial)

The LM4940 is a 6W stereo audio power amplifier primarily designed for demanding applications in flat panel monitors and TVs. It is capable of delivering 6 watts per channel to a 4Ω load with less than 10% THD+N while operating on a 14.4VDC power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4940 does not require boot-strap capacitors or snubber circuits. Therefore, it is ideally suited for display applications requiring high power and mini- mal size. The LM4940 features a low-power consumption active-low shutdown mode. Additionally, the LM4940 features an inter- nal thermal shutdown protection mechanism along with short circuit protection. The LM4940 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM4940 is a unity-gain stable and can be configured by external gain-setting resistors.

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The ADC12DS080 is a high-performance, low-power 12-bit AD converter released by Analog Devices, using a differential architecture with a maximum sampling rate of 80MSPS.

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LM22673 3A SIMPLE SWITCHER, Step-Down Voltage Regulator with Adjustable Soft-Start and Current Limit

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LP3936 is a complete lighting management system designed for portable wireless applications. It contains a boost DC/DC converter, 4 white LED drivers to drive the main LCD panel backlight, 2 white LED drivers for sub-LCD panel and 1 set of RGB LED drivers. Both WLED groups have 8-bit programmable constant current drivers that are separately adjustable and matched to 1% (typ.). For efficient backlighting the backlight intensity can be adjusted using the 8-bit ADC with ambient light detection circuit. The RGB LED drivers are PWM-driven with programmable color, intensity and blinking patterns. In addition, they feature a FLASH function to support picture taking with camera- enabled cellular phones. An efficient magnetic boost converter provides the required bias operating from a single Li-Ion battery. The DC/DC con- verter output voltage is user programmable for adapting to different LED types and for efficiency optimization. All func- tions are software controllable through an I2C and MicroWire/SPI compatible interface and 16 internal regis- ters.

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The LM4128 precision voltage reference is a surface-mount package ideal for space critical applications. It eliminates the need for an external stabilizing capacitor and ensures stability with capacitive loads up to 10 µF, making it easy to use. Compared to shunt references, series references consume lower power since they don't have to idle the maximum possible load current under no load conditions. The LM4128 has a low quiescent current of 60 µA and a low dropout voltage of 400 mV, making it suitable for battery-powered solutions. It is available in four grades (A, B, C, and D) with varying initial accuracy and temperature coefficients.

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This document is a datasheet for the LME49811 audio power amplifier. The amplifier has high fidelity and output power can be scaled according to the supply voltage and number of output devices. In addition, the amplifier also has a thermal shutdown circuit that will activate when the die temperature exceeds 150°C.

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DS91D176/DS91C176 100 MHz Single Channel M-LVDS Transceivers, designed for applications that utilize multipoint networks (e.g. clock distribution in ATCA and uTCA based systems)

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LMH1981 is a high performance multi-format sync sep- arator ideal for use in a wide range of video applications, such as broadcast and professional video equipment and HDTV/DTV systems. The input accepts standard analog SD/ED/HD video signals with either bi-level or tri-level sync, and the outputs provide all of the critical timing signals in CMOS logic, which swing from rail-to-rail (VCC and GND) including Composite, Hori- zontal, and Vertical Syncs, Burst/Back Porch Timing, Odd/Even Field, and Video Format Outputs. HSync features very low jitter on its leading (falling) edge, minimizing external cir- cuitry needed to clean and reduce jitter in subsequent clock generation stages. The LMH1981 automatically detects the input video format, eliminating the need for programming using a microcontroller, and applies precise 50% sync slicing to ensure accurate sync extraction at OH, even for inputs with irregular amplitude from improper termination or transmission loss. Its unique Video Format Output conveys the total horizontal line count per field as an 11-bit binary serial data stream, which can be decoded by the video system to determine the input video format and enable dynamic adjustment of system parameters, i.e.: color space or scaler conversions. The LMH1981 is available in a 14-pin TSSOP package and operates over a temperature range of −40°C to +85°C.

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The LM2941 positive voltage regulator is capable of sourcing 1A of output current with a typical dropout voltage of 0.5V and a maximum of 1V over the entire temperature range. It includes a quiescent current reduction circuit that reduces the ground pin current when the differential between the input voltage and the output voltage exceeds approximately 3V. The quiescent current with 1A of output current and an input-output differential of 5V is only 30mA. Higher quiescent currents only exist when the regulator is in the dropout mode (VIN - VOUT ≤ 3V). The LM2941 and all regulated circuitry are protected from reverse battery installations or two-battery jumps. During line transients, such as load dump when the input voltage can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to protect both the internal circuits and the load. Familiar regulator features such as short circuit and thermal overload protection are also provided.

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LM3678 is a high-performance, miniature 1.5A step-down DC-DC converter for handheld applications.

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LP38690-ADJ/LP38692-ADJ 1A Low Dropout CMOS Linear Regulators with Adjustable Output Stable with Ceramic Output Capacitors

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LMV651/LMV652/LMV654 are National's high performance, low power operational amplifier ICs implemented with National's advanced VIP50 process. This family of parts features 12 MHz of bandwidth while consuming only 116 μA of current, which is an exceptional bandwidth to power ratio in this op amp class.

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This datasheet provides detailed information on the features and characteristics of the LM4908 10kV ESD Rated, Dual 120 mW Headphone Amplifier.

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The LM22678 series of regulators are monolithic integrated circuits which provide all of the active functions for a step-down (buck) switching regulator capable of driving up to 5A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance N-channel MOSFET. The series consists of a fixed 5V output and an adjustable version. The SIMPLE SWITCHER® concept provides for an easy to use complete design using a minimum number of external components and National’s WEBENCH® design tool. National’s WEBENCH® tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy design-in. The switching clock frequency is provided by an internal fixed frequency oscillator which operates at 500 kHz. The LM22678 series also has built in thermal shutdown, current limiting and an enable control input that can power down the regulator to a low 25 µA quiescent current standby condition.

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lm120/lm320 series 3-terminal negative regulators

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The LM35 series are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Celsius (Centigrade) temperature. The LM35 thus has an advantage over linear temperature sensors calibrated in ˚ Kelvin, as the user is not required to subtract a large constant voltage from its output to obtain convenient Centi- grade scaling.

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The DS32EV400 programmable quad equalizer provides compensation for transmission medium losses and reduces the medium-induced deterministic jitter for four NRZ data channels.

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The LP2966 is a dual ultra low-dropout regulator from ON Semiconductor that operates from a +2.70V to +7.0V input supply. The rated output current is 150mA, and the dropout voltage is extremely low, making it very suitable for battery powered and portable applications. The LP2966 features independent shutdown capability for each LDO and low noise performance with low ground pin current in an extremely small MSOP-8 package. A wide range of preset voltage options are available for each output. In addition to the voltage combinations listed in the ordering information table, many more are available upon request with minimum orders. In all, 256 voltage combinations are possible.

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LM22672 1A SIMPLE SWITCHER® Step-Down Voltage Regulator with Features:

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The LM4861 is a 1.1W audio power amplifier designed for low-power portable systems. It features an externally controlled, low-power consumption shutdown mode and an internal thermal shutdown protection mechanism.

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