The OPA2673 provides output voltage and current capabilities that are unsurpassed in a low-cost dual monolithic op amp. Under no-load conditions at +25°C, the output voltage typically swings closer than 1.1 V to either supply rail; the tested (+25°C) swing limit is within 1.2 V of either rail. The OPA2673 is capable of delivering around 700 mA of source and sink current at room temperature. Figure 8-4 and Figure 8-5 shows the relation between current output of the OPA2673 at different temperatures and maximum voltage swing at that current output under loaded conditions.

Figure 8-4 Output Headroom vs Output Current

Figure 8-5 Output Voltage and Current Limitations

For the specifications described previously, consider voltage and current limits separately. In many applications, the voltage times the current (or V-I product) is more relevant to circuit operation. Figure 8-5 shows the zero-voltage output current limit and the zero-current output voltage limit on the X- and Y-axes, respectively. The four quadrants give a more detailed view of the OPA2673 output drive capabilities, noting that the graph is bounded by a safe operating area of 2‑W maximum internal power dissipation (in this case, for one channel only). Superimposing resistor load lines onto the plot shows that the OPA2673 can drive ±4 V into 10 Ω or ±4.5 V into 25 Ω without exceeding the output capabilities or the 2-W dissipation limit. A 100-Ω load line (the standard test circuit load) shows the full ±4.8-V output swing capability, as stated in the Electrical Characteristics.