The low input noise voltage is achieved with reduced supply current. The total noise is optimized for a source resistance between 0.8k and 12k. Due to the input bias current cancellation technique used, the resistance seen by each input does not need to be balanced. The output drives a 150 load to 3V with 5V supplies. On a single 5V supply the output swings from 1.5V to 3.5V with a 500 load connected to 2.5V. The amplifier is unitygain stable (CLOAD 100pF).