National Manuals

The LP2994 regulator is designed to provide a linear solution to meet the JEDEC SSTL-2 and SSTL-3 specifications (Se- ries Stub Termination Logic) for active termination of DDR- SDRAM. The device utilizes an internal operational amplifier to provide linear regulation of VTT without the need for expensive external components. The output stage prevents shoot through while delivering 1.5A continuous current and maintaining excellent load regulation. The LP2994 also in- corporates an active low shutdown pin to tri-state the output during Suspend To Ram (STR) states. Patents Pending Features: Source and sink current, Low external component count, Independent analog and power rails, Linear topology, Small package SO-8, Low cost and easy to use, Shutdown pin. Applications: SSTL-2, SSTL-3, DDR-SDRAM Termination, DDR-II Termination.

The ADC104S101 is a low-power, four-channel CMOS 10-bit analog-to-digital converter with a high-speed serial interface. It is specified over a sample rate range of 500 kSPS to 1 MSPS and supports multiple serial interface standards. The converter is based on a successive-approximation register architecture with an internal track-and-hold circuit. It can be configured to accept up to four input signals. The ADC104S101 operates with a single supply voltage ranging from +2.7V to +5.25V. The power consumption varies depending on the supply voltage, with a minimum of 0.12 µW. This product is suitable for portable systems and other applications.

The LM27241 is a single-channel high-voltage synchronous buck regulator controller from Texas Instruments. It features a 200kHz-500kHz operating frequency and is ideal for battery-powered applications such as laptops. The LM27241 uses N-channel field-effect transistors and does not require an external resistor for current limiting. It also features line feedforward and a unique adaptive duty cycle clamping technique to improve the response to input transients. The input voltage range is 5.5V-28V, and the output voltage can be adjusted down to 0.6V. The LM27241 also has soft-start, undervoltage lockout, power good signal, and enable control functions.

The LMH6515 is a high performance, digitally controlled variable gain amplifier (DVGA) that combines precision gain control with a low noise, ultra-linear, differential amplifier. It is typically used to drive a high performance ADC in a wide range of mixed signal and digital communication applications, such as mobile radio and cellular base stations, where automatic gain control (AGC) is required to increase system dynamic range. When used in conjunction with a high speed ADC, the system dynamic range can be extended by up to 32 dB. The LMH6515 has a differential input and output, allowing for large signal swings on a single 5V supply. It is designed to accept signals from RF elements and maintain a terminated impedance environment. The input impedance is 200Ω resistive. The output impedance can be selected as either 200Ω or 400Ω. A unique internal architecture allows for use with both single ended and differential input signals. The input signals to the LMH6515 are scaled by a highly linear, digitally controlled attenuator with 31 accurate 1 dB steps. The attenuator output provides the input signal for a high gain, ultra-linear differential transconductor. The transconductor's differential output current can be converted into a voltage by using the on-chip 200Ω or 400Ω loads. The transconductance gain is 0.1 Amp/Volt, resulting in a maximum voltage gain of +26 dB when driving a 200Ω load.

The ADC121S051 is a low-power, single channel CMOS 12-bit analog-to-digital converter with a high-speed serial interface. It has a sample rate range of 200 ksps to 500 ksps. The converter is based on a successive-approximation register architecture with an internal track-and-hold circuit. The output serial data is straight binary and is compatible with several standards, such as SPI™, QSPI™, MICROWIRE, and many common DSP serial interfaces. The ADC121S051 operates with a single supply that can range from +2.7V to +5.25V. Normal power consumption using a +3.6V or +5.25V supply is 1.7 mW and 8.7 mW, respectively. The power-down feature reduces the power consumption to as low as 2.6 µW using a +5.25V supply. The ADC121S051 is packaged in 6-lead LLP and SOT-23 packages. Operation over the industrial temperature range of −40˚C to +85˚C is guaranteed.

The LM1085 is a series of 3A low dropout positive voltage regulators with a maximum dropout of 1.5V at 3A of load current. It has the same pin-out as National Semiconductor's industry standard LM317. The LM1085 is available in an adjustable version, which can set the output voltage with only two external resistors. It is also available in three fixed voltages: 3.3V, 5.0V and 12.0V. The fixed versions integrate the adjust resistors. The LM1085 circuit includes a zener trimmed bandgap ref- erence, current limiting and thermal shutdown. The LM1085 series is available in TO-220 and TO-263 pack- ages. Refer to the LM1084 for the 5A version, and the LM1086 for the 1.5A version.

The LM7171 is a National Semiconductor very high speed, high output current voltage feedback amplifier with the slewing characteristic of a current feedback amplifier, yet it can be used in all traditional voltage feedback amplifier configurations. It is ideal for video and high speed signal processing applications such as HDSL and pulse amplifiers.

The LMC7211 is a micropower CMOS comparator available in space saving SO-8 and SOT23-5 packages. This makes the comparator ideal for space and weight critical designs. The LMC7211 provides low power, low input current, high output drive, and high common mode range, making it ideal for use in mobile devices, notebook computers, personal digital assistants, and PCMCIA cards.

The ADC78H89 is a low-power, seven-channel CMOS 12-bit analog-to-digital converter with a conversion throughput of 500 KSPS.

DS90LV048A 3V LVDS Quad CMOS Differential Line Receiver is a quad CMOS flow-through differential line receiver designed for applications requiring ultra low power dissipation and high data rates.

The LMH6504 is a wideband, low power, variable gain amplifier from Texas Instruments. Its maximum gain is 80 dB, bandwidth is 10 MHz, and it can directly drive low impedance loads.

The ADC081S021 is a low-power, single channel CMOS 8-bit analog-to-digital converter with a high-speed serial interface. Unlike the conventional practice of specifying performance at a single sample rate only, the ADC081S021 is fully specified over a sample rate range of 50 ksps to 200 ksps. The converter is based upon a successive-approximation register architecture with an internal track-and-hold circuit. The output serial data is straight binary, and is compatible with several standards, such as SPI™, QSPI™, MICROWIRE, and many common DSP serial interfaces. The ADC081S021 operates with a single supply that can range from +2.7V to +5.25V. Normal power consumption using a +3.6V or +5.25V supply is 1.3 mW and 7.7 mW, respectively. The power-down feature reduces the power consumption to as low as 2.6 µW using a +5.25V supply. The ADC081S021 is packaged in 6-lead LLP and SOT-23 packages. Operation over the industrial temperature range of −40˚C to +85˚C is guaranteed.

The LM628/LM629 are dedicated motion-control processors designed for use with a variety of DC and brushless DC servo motors, and other servomechanisms which provide a quadrature incremental position feedback signal.