1.8V chopper stabilised dual precision op

Diodes has announced its first precision op-amp, the chopper-stabilised dual AS2333, which has rail-to-rail inputs and outputs and operates over 1.8V to 5.5V (or ±0.9V to ±2.75V) and -40°C to +125°C.

Typical figures are 8µV input offset, 0.02µV/°C drift over time and temperature, 120dB common-mode rejection ratio and 130dB open-loop gain.

The amplifiers have a bandwidth 350kHz and typically slew at up to 0.12V/μs.

Update: Diodes automotive-qualified this part in 2022

"The chopper stabilisation also addresses low frequency 1/f noise and offset voltage crossover distortion," according to the company. "Typical applications for the AS2333 include transducers, medical equipment, chemical detectors, and handheld test instruments." Noise, from the data sheet, is 1.1μVp-p (0.01Hz to 10Hz).

Common-mode range extends 100mV beyond the supplies and an output swing that is within 50mV of the rails.

200pF can be driven directly at unity-gain without oscillation, according to the data sheet, and an output series resistor can be added for higher load values. The data sheet also covers adding output RD snubbers to improve output transient response in the face of capacitive loads.

Quiescent current is typically 24μA (5V, both channels), and it comes in either SO-8 or MSOP-8.

Use with small output sensors for pressure, sound, light, temperature, voltage and current is expected.

The product page is here

The data sheet is here