New high-precision automotive-compliant op amp from Diodes Incorporated

Diodes Incorporated releases a high-precision operational amplifier (op amp) featuring input offset (VOS) stabilization for automotive signal conditioning applications. The micro-power AS333Q, a single-channel version of the dual-channel AS2333Q op amp, is designed for current sensing and signal detection in a broad range of in-vehicle functions, including airbags, position sensors, vehicle occupant detection sensors, on-board chargers (OBC) and wireless chargers, and battery management systems (BMS).

The chopper-stabilized low input offset voltage (VOS = 8µV) and almost-zero temperature drift (0.02µV/°C) of the AS333Q enable it to maintain high accuracy across the full common-mode input voltage range.

In addition, the device’s ability to handle beyond-the-rail-to-rail common-mode inputs allows the AS333Q to support both supply and ground-referenced inputs. The extremely low 1.1µV/√Hz low-frequency noise helps to improve signal-to-noise ratios (SNR), while a low quiescent current of 17μA (typical) means it can be used in equipment that must continue operating while a vehicle’s engine is off.

The AS333Q is qualified to AEC-Q100 Grade 1, manufactured in IATF 16949 certified facilities, and is PPAP capable.

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