ZHCSJY2A June 2019 – September 2019 OPA2834
PRODUCTION DATA.
The OPA2834 is a rail-to-rail output (RRO) op amp. Rail-to-rail output typically means that the output voltage swings within a couple hundred millivolts of the supply rails. There are different ways to specify this parameter, one is with the output still in linear operation and another is with the output saturated. Saturated output voltages are closer to the power-supply rails than linear outputs, but the signal is not a linear representation of the input. Linear output is a better representation of how well a device performs when used as a linear amplifier. Saturation and linear operation limits are affected by the output current, where higher currents lead to lower headroom from either of the output rails.
The Electrical Characteristics: 3V to 5V list the saturated output voltage specifications with a 5-kΩ load. Given a light load, the output voltage limits have nearly constant headroom to the power rails and track the power-supply voltages. For example, with a 5-kΩ load and a single 5-V supply, the saturation output voltage ranges from 0.1 V to 4.95 V and ranges from 0.1 V to 2.65 V for a 2.7-V supply.Figure 41 illustrates the saturated voltage-swing limits versus output load resistance.
With a device such as the OPA2834, where the input range is lower than the output range, typically the input limits the available signal swing only in a noninverting gain of 1. Signal swing in noninverting configurations in gains greater than +1 and inverting configurations in any gain is typically limited by the output voltage limits of the op amp.