MCP6SX2DM-PCTLTH Microchip Technology, MCP6SX2DM-PCTLTH Datasheet - Page 17

• Manufacturer Part Number: MCP6SX2DM-PCTLTH
• Description: BOARD DEMO PICTAIL THERM MCP6SX2
• Manufacturer: Microchip Technology
• Series: PICtail™r

Specifications of MCP6SX2DM-PCTLTH

• Sensor Type: Thermistor
• Interface: Analog
• Voltage - Supply: 2.5 V ~ 5.5 V
• Embedded: No
• Utilized Ic / Part: MCP6S22, MCP6S92
• Processor To Be Evaluated: MCP6Sx2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Sensitivity: -
• Sensing Range: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

© 2006 Microchip Technology Inc.
Using the MCP6SX2 PGA Thermistor PICtail™ Demo Board
3.2.4
DIP switch SW2 and resistors R
(Rvar in Figure 3-1). Rvar produces a binary sequence of resistances between 0Ω and
409.5 kΩ.
Refer to Figure A.4 for the complete schematic.
FIGURE 3-3:
Each resistor with its switch (in SW
resistor values, is not added into the total for R
Each resistor with its switch (in SW
values, is added into the total for R
As an example, if the top ten switches are to the right, and the bottom two are to the
left, then Rvar is calculated as 0 + 0 + ... + 0 + 102,400 + 204,800 = 307,200Ω.
AN897, “Thermistor Temperature Sensing with MCP6SX2 PGAs” (DS00897) contains
information on converting this resistance to the equivalent, nominal thermistor
temperature, and visa-versa.
3.2.5
See “Chapter 2. Using the PICkit™ Signal Analysis PC Application” of the “Signal
Analysis PICtail™ Daughter Board User’s Guide” (DS51476) for details on displaying
measured results. The possible formats include: oscilloscope, FFT, histogram and
strip-chart.
The measured results can then be interpreted as temperature; see AN897, “Thermistor
Temperature Sensing with MCP6SX2 PGAs” (DS00897).
Configuring DIP Switch SW2 (R
Using the Signal Analysis PC Application for This Board
102,400
204,800
12,800
25,600
51,200
1,600
3,200
6,400
100
200
400
800
R
TH
Emulator (Rvar).
SW2
Draft
8
– R
2
A
2
) pointing to the left, towards the silk screen resistor
.
) pointing to the right, away from the silk screen
19
in Figure 3-3 comprise the thermistor emulator
A
TH
(it shorts that resistor).
Emulator, Rvar)
R8
R9
R10 402Ω
R11 806Ω
R12 1.6 kΩ
R13 3.24 kΩ
R14 6.49 kΩ
R15 12.7 kΩ
R16 25.5 kΩ
R17 51.1 kΩ
R18 102 kΩ
R19 205 kΩ
100Ω
200Ω
DS51517B-page 13