5.5MHz precision dual op

Diodes has used post-package trimming to hone a 25μV maximum offset 9.5nV√Hz (1kHz) noise dual op amp with 5.5MHz bandwidth.

Called AS2376Q, the device is intended for filtering and control, particularly in automotive applications – it is qualified AEC-Q100 Grade 1 and has automotive-grade supporting PPAPs.

Both input and output are rail-to-rail, and operation is over 2.2 to 5.5V (950μA max quiescent) and 40°C to +125°C.

Power supply rejection ratio is typically 5μV/V. "Low voltage operation, low quiescent current and excellent PSRR makes it suitable for direct battery-powered applications and noise-sensitive applications with noisy low-voltage rails," according to the company.

When inputs approach one volt less than the positive rail, a differential pair of nmos transistors takes over from the trimmed pmos pair used at all lower input voltage. The npn pair does not have precision characteristics and offset voltage is likely to suffer. Pnp input offset trimming is optimised for best performance at half supply voltage.

Packaging is SO-8.

For more accurate automotive amplifier needs, Diodes has just qualified its AS2333 (introduced in 2021) to make the AS2333Q dual chopper-stabilised rail-to-rail (in and out) precision op-amp.

Specs of the original are typically 8µV input offset, 0.02µV/°C drift over time and temperature, 120dB common-mode rejection ratio and 130dB open-loop gain. Bandwidth is 350kHz, and it typically slews at up to 0.12V/μs. Operation over 1.8V to 5.5V (or ±0.9V to ±2.75V) and -40°C to +125°C.