AC164120 Microchip Technology, AC164120 Datasheet - Page 27

• Manufacturer Part Number: AC164120
• Description: BOARD SIGNAL ANALYSIS PICKIT
• Manufacturer: Microchip Technology
• Series: PICtail™r

Specifications of AC164120

• Main Purpose: Interface, Signal Analysis
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: PICkit™ PICtail™1
• Primary Attributes: Real-time Strip Chart, Oscilloscope, Fast Fourier Transformation (FFT)
• Secondary Attributes: Histogram
• Silicon Manufacturer: Microchip
• Core Architecture: PIC
• Core Sub-architecture: PIC16
• Features: Real-Time Strip Chart, Fast Fourier Transformation
• Silicon Core Number: PIC16F
• Silicon Family Name: PIC16F6xxx
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: PICkit Flash Starter Kit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

3.4
 2004 Microchip Technology Inc.
LESSON 2 – PHOTODIODE
A simple photodiode circuit can be constructed from the schematic shown in
Figure 3-3. D
MCP6001U op amp. R
I
performance. R
maximum sample rate of the Signal Analysis PICtail Daughter Board is 5000 samples
per second (sps), the low-pass pole is set near 500 Hz.
R
C
The nearest standard value of 33 nF, giving
f
Table 3-1 summarizes the final design values of the components in Figure 3-3.
Figure 3-4 through Figure 3-6 show screen captures from data acquisitions from the
photodiode placed 30 cm under a fluorescent desk lamp. The sample size was 1024
and the sample speed was set at 1000.
FIGURE 3-3:
TABLE 3-1:
S
RnCn
2
2
, and V
= 10.0 kΩ
≈ 1/(2π(500 Hz)(10.0 kΩ)) = 32 nF
Component
= 1/(2π(10.0 kΩ)(33 nF)) = 482 kHz
OUT
C
C
C
D
R
R
U
1
2
3
1
1
2
1
1
≈ 0V at the minimum I
is a Panasonic PNZ334 PIN photodiode. U
2
PHOTODIODE PICtail™ COMPONENTS
and C
PHOTODIODE PICtail™ SCHEMATIC DIAGRAM
PNZ334
1
2
was chosen to be 64.9 kΩ so that V
form a low-pass filter for noise performance. Since the
D
1
Value/Part No.
64.9 kΩ, 1%
MCP6001U
Panasonic
PNZ334
10.0 kΩ
0.1 µF
18 pF
33 nF
S
MCP6001U
. C
U
+5V
3
C
R
1
is a 0.1 µF capacitor for good supply bypass
1
1
R
C
2
2
C
0.1µ
3
Lesson Projects
1
Plastic Through-hole,
OUT
is Microchip Technology
Size/Package
V
100 mil pitch
≈ 4.5V at the maximum
SMD 0805
SMD 0805
SMD 0805
SMD 0805
SMD 0805
OUT
SOT-23-5
DS51476A-page 23