MCP6021T MICROCHIP [Microchip Technology], MCP6021T Datasheet - Page 21

• Manufacturer Part Number: MCP6021T
• Description: Rail-to-Rail Input/Output, 10 MHz Op Amps
• Manufacturer: MICROCHIP [Microchip Technology]

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.
5.6 pF
Photo
Detector
100 kΩ
100 pF
MCP6021
V
/2
DD
FIGURE 4-13:
Transimpedance Amplifier
for an Optical Detector.
© 2009 Microchip Technology Inc.
DS21685D-page 21