ADI's ADA4522 are single/dual and quad channel, 55 V, zero drift rail-to-rail operational amplifiers (op amps) with enhanced EMI protection. These op amps can be supplied by a single voltage of 4.5 V to 55 V or by dual supply of ±2.5 V to 27.5 V. The ADA4522 has very low voltage density of 5.8 nV/√Hz typical and 117 nV_PP typical from 0.1 Hz to 10 Hz. These op amps have low input bias current at 50 pA (typical) and unit-gain crossover of 3 MHz (typical). The ADA4522 comes with an operational temperature range of -40°C to +125°C and is available in SOIC, TSSOP, and MSOP packages. These single, dual, and quad channel, zero drift, EMI enhanced operational amplifiers are perfect for shunt current sensing, test, and measurement applications.