Datasheet

MCP6021/1R/2/3/4

4.11.2 OPTICAL DETECTOR AMPLIFIER

Figure 4-13 shows the MCP6021 op amp used as a

transimpedance amplifier in a photo detector circuit.

The photo detector looks like a capacitive current

source, so the 100 kΩ resistor gains the input signal to

a reasonable level. The 5.6 pF capacitor stabilizes this

circuit and produces a flat frequency response with a

bandwidth of 370 kHz.

FIGURE 4-13: Transimpedance Amplifier

for an Optical Detector.

Photo

Detector

100 pF

5.6 pF

100 kΩ

MCP6021