Diodes integrates input offset stabilisation in automotive op amp
A high precision operational amplifier (op amp) released by Diodes features input offset (VOS) stabilisation for automotive signal conditioning applications. The micro-power AS333Q is a single-channel version of the dual-channel AS2333Q op amp. It 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).
Automotive designs are increasingly employing brushless DC (BLDC) motors and electronic control units (ECU) for advanced driver assistance systems (ADAS), explained the company. These require precision op amps for accurate analogue signal conditioning. The chopper-stabilised low input offset voltage (VOS is 8.0 microV) and almost-zero temperature drift (0.02 microV per degree C) of the AS333Q enable it to maintain high accuracy across the full common mode input voltage range.
The AS333Q can handle beyond-the-rail-to-rail common mode inputs which allows it to support both supply and ground referenced inputs. The low 1.1 microV/√Hz low-frequency noise helps to improve signal-to-noise ratios (SNR), while a low quiescent current of 17 microA (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. It is available in the SOT25 package.
Diodes is a Standard and Poor’s SmallCap 600 and Russell 3000 Index company. It delivers semiconductor products to companies in the automotive, industrial, computing, consumer electronics, and communications markets. Its expanded product portfolio consists of discrete, analogue and mixed-signal products and leading-edge packaging technology. The broad range of application-specific solutions and solutions-focused sales, coupled with worldwide operations of 32 sites, including engineering, testing, manufacturing, and customer service, enables the company to provide for high volume, high growth markets.
