The new TLE2301 Excalibur operational amplifier combines high speed, high power drive, and a three-state output to simplify the design of power audio and power-line communications circuits.
A three-state output makes the TLE2301 useful for power-line communications in consumer and industrial applications. Traditional circuits for providing high power amplification with a high impedance output state require low resistance, low distortion, power MOSFETs. These can be expensive and difficult to find. The TLE2301 uses TI's Excalibur technology to offer a low distortion output which can be placed in a high impedance mode with a single control signal, eliminating the need for costly external switches.
The TLE2301 can eliminate the need for low-distortion discrete transistors in medium-power audio systems. Conventional op amps typically have outputs capable of driving only tens of milliamps at best, limiting their usefulness in many higher-power applications. The TLE2301 has a high-power class-AB output stage that can drive up to 1 ampere loads. By combining this with 8-MHz gain-bandwidth and 12-V/µs slew rate, the TLE2301 simplifies power audio circuit design.
Applications requiring high output drive with high speed and low distortion amplification over a wide bandwidth will benefit from the TLE2301's unique combination of features. New applications in power-line communications using power line modems (remote heating and light control, building management, remote metering) will benefit from its three-state output. The TLE2301 operates over temperatures from -40°C to 85°C.
Vol 9, Summer, 1994