Op Amp Combines High Voltage and High Accuracy
Texas Instruments introduced a precision power operational amplifier (op amp) which operates on supplies up to 100V and provides a high output current of ±50mA with a 150 mA short circuit limit. The OPA454 is unity-gain stable and can track fast moving signals since it has a slew rate of 10V/µs and gain-bandwidth product of 2.5 MHz. It features a single or dual supply of ±4V (8V) to±50V (100V). High DC accuracy of 4 mV maximum offset and 5 µV/C drift permits precision DC measurement over temperature. The OPA454 also has a low bias current of ±110 pA that allows accurate measurements from high impedance sources or sensitive current shunt circuits. Additional features include a fast-acting enable/disable pin referenced to the common pin, which can be ground. This feature saves power and provides protection for the amplifier and the load. Also, an output status flag, referenced to the common pin, tells the user when an over-current or thermal overload condition occurs. This allows easy connection to low-voltage logic circuitry. The OPA454 is priced at $3.45 each in 100-piece quantities.
Texas Instruments, 800-477-8924, www.ti.com