JAJSNI4 December 2021 DAC11001B
PRODUCTION DATA
The bias current mismatch in the output amplifier can lead to offset error at the output. To minimize mismatch, the amplifier must have a matching resistor to that of the R2R output impedance on the feedback path. The feedback resistors are used in parallel for this purpose, as shown in Figure 8-11. Some amplifiers may become unstable with a feedback resistor in the buffer configuration; therefore, a compensation capacitor (CCOMP) might be needed, as shown. The typical value of this capacitor is in the range of 22 pF to 100 pF, depending on the amplifier.