National Manuals

The LM7121 is a high performance operational amplifier from TI with 235MHz bandwidth and 1300V/µs slew rate. It is available in a Tiny SOT23-5 package and is ideal for portable applications with space and weight constraints.

The LM711 is a dual differential voltage comparator featuring high accuracy, fast response times, large input voltage range, low power consumption and compatibility with practically all integrated logic forms. When used as a sense amplifier, the threshold voltage can be adjusted over a wide range, almost independent of the integrated circuit characteristics. Other applications of the dual comparator include a window discriminator in pulse height detectors and a double ended limit detector for automatic Go-No-Go test equipment.

The LM710 is a high-precision, low-level digital level sensor with a speed faster than operational amplifiers. The circuit has a differential input and a single-ended output, with saturated output levels compatible with virtually all types of integrated logic.

The LM71 is a low-power, high-resolution digital temperature sensor with an SPI and MICROWIRE compatible interface. It is available in the 5-pin SOT23 or 6-pin LLP package. The LM71 can be queried at any time to read temperature and is suitable for systems where low power consumption is critical. It has a 13-bit plus sign temperature resolution (0.03125˚C per LSB) and operates over a temperature range of −40˚C to +150˚C. The LM71 has a supply voltage range of 2.65V to 5.5V, fast conversion rate, low supply current, and a simple SPI interface, making it ideal for various applications.

The LM709 is an operational amplifier produced by National Semiconductor. Its features are high gain, low bias current, large output capability and a working temperature range of 0°C to 70°C.

LM70 is a 10-bit temperature sensor produced by TI. It supports SPI and MICROWIRE protocol. The measurement range is -55~150℃. The operating voltage is 2.65~5.5V and the supply current is 260uA (typical)~490uA (maximum). The standby current is 12uA (typical).

The LMV341/342/344 are single, dual, and quad low voltage, and low power Operational Amplifiers. They are designed specifically for low voltage portable applications. Other important product characteristics are low input bias current, rail-to-rail output, and wide temperature range.

LMV331/393/339 are low voltage (2.7-5V) versions of the dual and quad comparators, LM393/339, which are specified at 5-30V. The LMV331 is the single version, which is available in space saving SC70-5 and SOT23-5 packages. SC70-5 is approximately half the size of SOT23-5. The LMV393 is available in 8-pin SOIC and 8-pin MSOP. The LMV339 is available in 14-pin SOIC and 14-pin TSSOP. The LMV331/393/339 is the most cost-effective solution where space, low voltage, low power and price are the primary specification in circuit design for portable consumer products. They offer specifications that meet or exceed the familiar LM393/339 at a fraction of the supply current. The chips are built with National's advanced Submicron Silicon-Gate BiCMOS process. The LMV331/393/339 have bipolar input and output stages for improved noise performance.

This document introduces the features and characteristics of the LMV321/LMV358/LMV324 series products, including low voltage, space saving and low price.

LMV248 dual band GSM power controller

The LMV243 is a single-channel, quad-band GSM power controller designed for use within an RF transmit power control loop in GSM mobile phones. It supports GaAs HBT and bipolar RF single supply power amplifiers. The circuit operates with a single supply voltage ranging from 2.7V to 3.3V. The LMV243 includes an RF detector, error amplifier, ramp V/I converter, and output driver. Its input interface consists of an RF input, ramp voltage, and a digital input for the 'Shutdown/Transmit Enable' function. The device is active when TX_EN = HI and goes into a low power consumption shutdown mode otherwise. During shutdown, the output is in high impedance (tri-state). The LMV243 utilizes a single external RC combination for stable operation, accommodating individual power amplifier characteristics. It is offered in an 8-bump micro SMD package measuring 1.5mm x 1.5mm x 0.995mm, allowing for flexible product placement on the circuit board.

The LMV242 is a power amplifier (PA) controller intended for use within an RF transmit power control loop in GSM/GPRS mobile phones.

The LMV232 is a dual-channel integrated mean square power detector designed for CDMA and WCDMA applications. It features high accuracy, single supply operation, and low power consumption.

The LMV225/LMV226/LMV228 are 30 dB RF power detectors intended for use in CDMA and WCDMA applications