What this dual op-amp brings to an automotive BOM
The STMicroelectronics LM2904WHYST is a dual general-purpose operational amplifier qualified to AEC-Q100, meaning it is built and tested for automotive-grade reliability — under-hood, cabin, or chassis-domain. The 1.1 MHz gain-bandwidth product and 0.6 V/µs slew rate are typical for a general-purpose op-amp used in sensor signal conditioning, actuator drive, or power-supply feedback loops — not a high-speed part, but adequate for DC to low-kHz analog paths. Supply range spans 3 V to 30 V single supply, which lets it run from a 5 V rail or a 24 V truck battery without a separate regulator.
Supply current and output drive — fitting the rail budget
Each amplifier draws 700 µA supply current, so the dual-channel part pulls about 1.4 mA total quiescent — a reasonable figure for always-on sensor interfaces in a vehicle. Input bias current is 20 nA typical, which keeps offset errors low when working with high-impedance sensors like thermistors or piezo elements.
Package and footprint — hand-solderable SOIC-8
The LM2904WHYST comes in an 8-SOIC package (3.90 mm body width, 0.154" pitch). It is a surface-mount part, but the 1.27 mm lead pitch is easy to hand-solder with a fine tip — no hot-air gun required for prototyping.
The part is ROHS3 compliant.