Datasheet AD848, AD849 (Analog Devices) - 5

AD848/AD849
Figure 1. AD848 Inverting Amplifier Configuration Figure 2. AD849 Inverting Amplifier Configuration Figure 1a. AD848 Large Signal Pulse Response Figure 2a. AD849 Large Signal Pulse Response Figure 1b. AD848 Small Signal Pulse Response Figure 2b. AD849 Small Signal Pulse Response
OFFSET NULLING
The input voltage of the AD848 and AD849 are very low for high speed op amps, but if additional nulling is required, the circuit shown in Figure 3 can be used. For high performance circuits it is recommended that a resistor (RB in Figures 1 and 2) be used to reduce bias current errors by matching the impedance at each input. The offset voltage error caused by the input currents is decreased by more than an order of magnitude. Figure 3. Offset Nulling REV. B –5–