National Manuals

This document describes the analysis of pesticide 1,2,3,4,5,6-C6H6Cl6 concentration in seafood samples using Agilent EnviroPrep and gel permeation chromatography (GPC). The EnviroPrep column, filled with a high-resolution macroporous packing material, was selected for separation. The column is made of stainless steel and can be used in any high-pressure liquid chromatography system. The macroporous packing material has a strong and permanent pore structure, providing excellent separation efficiency in non-sample loading-intensive analysis. The small pore size eliminates interference from high molecular weight compounds and maximizes separation efficiency.

LM74A is a temperature sensor produced by Texas Instruments. It can measure temperatures between -55°C and +150°C with an accuracy of ±3.5°C.

The LM74A is a temperature sensor produced by Texas Instruments. It can convert temperature into digital signals. In the temperature range of -40℃ to +150℃, its resolution is 0.0625℃. The supply voltage range is 4.5V to 5.5V or 3.0V to 3.6V. The supply current is very low, only 10μA.

The LM748 is a general purpose operational amplifier with external frequency compensation. The unity-gain compensation specified makes the circuit stable for all feedback configurations, even with capacitive loads. It is possible to optimize compensation for best high frequency performance at any gain. As a comparator, the output can be clamped at any desired level to make it compatible with logic circuits.

LM741 is a general purpose operational amplifier produced by National Semiconductor Corporation, which features improved performance over industry standards such as LM709. It can replace 709C, LM201, MC1439 and 748 in most applications. The amplifier offers many features that make its application nearly foolproof: overload protection on the input and output, no latch-up when the common mode range is exceeded, as well as freedom from oscillations. LM741C/LM741E are identical to the LM741/LM741A except that the LM741C/LM741E have their performance guaranteed over a 0˚C to +70˚C temperature range, instead of −55˚C to +125˚C.

The LM74 is a temperature sensor, Delta-Sigma analog-to-digital converter with an SPI and MICROWIRE compatible interface. It has 12-bit plus sign temperature resolution and operates over a temperature range of -55°C to +150°C. The LM74's low supply current and simple SPI interface make it ideal for a wide range of applications, including thermal management and protection applications in hard disk drives, printers, electronic test equipment, and office electronics.

lm7372 is a dual operational amplifier that offers high slew rate, low power consumption and wide gain bandwidth product. it is ideal for video and high speed signal processing applications

The LM733 is a differential amplifier produced by National Semiconductor. It has a bandwidth of 120MHz and selectable gains. It is suitable for magnetic tape systems, disk file storage devices, thin film memories, linear amplifiers, etc.

The LM7301 is a low power, 4 MHz gain-bandwidth, rail-to-rail input-output operational amplifier. It offers features such as greater than rail-to-rail input range, full rail-to-rail output swing, large capacitive load driving ability, and low distortion. With a supply current of only 0.6 mA, the LM7301 supports new portable applications without draining battery life. It can be driven by voltages that exceed both power supply rails, eliminating concerns over exceeding the common-mode voltage range. The rail-to-rail output swing capability provides maximum dynamic range at the output, which is important for low supply voltage operation. Operating on supplies of 1.8V–32V, the LM7301 is excellent for a wide range of applications in low power systems. Placing the amplifier right at the signal source reduces board size and simplifies signal routing. The LM7301 fits easily on low profile PCMCIA cards.

LM9074EP Enhanced Plastic System Voltage Regulator with Keep-Alive ON/OFF Control

LM725 is an operational amplifier produced by National Semiconductor Corporation. It has high open loop gain, low input voltage drift, high common mode rejection ratio, low input noise current, low input offset current, high input voltage range, wide power supply range, offset elimination function and output short circuit protection function. It is suitable for low level instrumentation applications.

The LM723/LM723C is a voltage regulator designed primarily for series regulator applications. It can supply output currents up to 150 mA by itself, and external transistors can be added to provide any desired load current. The circuit features extremely low standby current drain, and provision is made for either linear or foldback current limiting. The LM723/LM723C is also useful in a wide range of other applications such as a shunt regulator, a current regulator or a temperature controller. The LM723C is identical to the LM723 except that the LM723C has its performance guaranteed over a 0˚C to +70˚C temperature range, instead of −55˚C to +125˚C.

The LM7171 is a high speed, high output current, voltage feedback amplifier. It has the slewing characteristic of a current feedback amplifier; yet it can be used in all traditional voltage feedback amplifier configurations. The LM7171 is stable for gains as low as +2 or −1. It provides a very high slew rate at 4100V/µs and a wide unity-gain bandwidth of 200 MHz while consuming only 6.5 mA of supply current. It is ideal for video and high speed signal processing applications such as HDSL and pulse amplifiers. With 100 mA output current, the LM7171 can be used for video distribution, as a transformer driver or as a laser diode driver. Operation on ±15V power supplies allows for large signal swings and provides greater dynamic range and signal-to-noise ratio. The LM7171 offers low SFDR and THD, ideal for ADC/DAC systems. In addition, the LM7171 is specified for ±5V operation for portable applications. The LM7171 is built on National’s advanced VIP™ III (Verti- cally integrated PNP) complementary bipolar process.

The LM715 is a high speed, high gain, monolithic operational amplifier designed for use in a wide range of applications where fast signal acquisition or wide bandwidth is required. The LM715 features fast settling time, high slew rate, low offsets, and high output swing for large signal applications. In addition, the device displays excellent temperature stability and will operate over a wide range of supply voltages.

The LM7131 is a high speed bipolar operational amplifier available in a tiny SOT23-5 package. This makes the LM7131 ideal for space and weight critical designs.