Texas Instruments has introduced a transimpedance amplifier that features 90MHz gain bandwidth, less than 25uV offset and inherent temperature and long-term stability.
The device is ideal for scanners, medical diagnostics and current measurement in test equipment.
The 90MHz gain bandwidth of the OPA380 enables a transimpedance bandwidth of greater than1MHz in most configurations. As a result of the 25uV maximum offset voltage and 0.1uV/C offset drift, a dynamic range of five decades can be achieved, which allows the measurement of signal currents from, for example, 10nA to 1mA.
In contrast to logarithmic amplifiers, the OPA380 provides a wide bandwidth throughout the full dynamic range. Other features include 50pA bias current, 6.5mA quiescent current and a 2.7V to 5.5V supply range.
The OPA380 is packaged in an MSOP-8 and SO-8, and is available now from TI and its authorised distributors. The device is priced from $1.95 in 1,000 piece quantities (suggested resale pricing).
The OPA2380 (dual version) will be available in 2Q 2004.