ZHCSBK1C December 2006 – January 2018 DAC8560
PRODUCTION DATA.
Amplifier input offset voltage (VOS) is a key consideration for this design. VOS of an op amp is a typical data-sheet specification but in-circuit performance is also impacted by drift over temperature, the common-mode rejection ratio (CMRR), and power supply rejection ratio (PSRR). Thus, consider these parameters as well. For AC operation also consider slew rate and settling time. Input-bias current (IB) can also be a factor, but typically the resistor network is implemented with sufficiently small resistor values that the effects of input-bias current are negligible.