Dual-channel, precision, 50-µV offset voltage, 40-MHz wide-bandwidth RRIO CMOS op amp

The single-channel OPA328,

dual-channel OPA2328 and quad-channel OPA4328 (OPAx328) are a new generation family

of precision, low-voltage CMOS operational amplifiers optimized for very low noise

and wide bandwidth.

The OPAx328 have a linear input stage

with zero-crossover distortion that delivers excellent common-mode rejection ratio

(CMRR) of 120dB (typical) over the full input range. The input common-mode voltage

range extends 100mV beyond the negative and positive supply rails. The output

voltage typically swings within 10mV of the rails.

The OPAx328 also use Texas

Instrument’s proprietary e‑trim™ operational amplifier

technology, enabling a unique combination of ultra-low offset and low input offset

drift without the need for any input switching or auto-zero techniques.

Low-noise

(6.1nV/√Hz) and high-speed operation (40MHz, 30V/µs) make

these devices a great choice for driving sampling analog-to-digital converters

(ADCs).

The OPAx328 are also a great choice

for high-impedance-input, single-supply applications. Low input bias current and low

input capacitance allows for high-frequency transimpedance gains at low photocurrent

operation (< 1nA).