Microchip Technology Inc

Analog Mixed Signal

The EMC1043 Triple Temperature Sensor Evaluation Board is a USB-based platform for evaluating the EMC1043 device. It provides the means to demonstrate the EMC1043 features and to view and modify registers through USB. LED indicators and test points are included to show status information. The 2N3904 diode-connected transistors are installed on the PCB.

Devices Supported:  EMC1043
The HV7321 Ultrasound TX Pulser Evaluation Board (ADM00659) works with Microchip Technology Inc.'s Ultrasound Platform Board (ADM00679) to provide a 4-Channel 5-Level, ±80V, 2.5A ultrasound transmit pulser demonstration platform including a very low phase noise, 8-Channel ±6V CW beamformer. The HV7321 Ultrasound TX Pulser Evaluation Board features one HV7321 IC and one MD1730 IC used as a 4-channel CW waveform generator.
The MCP1665 12V output boost regulator evaluation board is intended to provide a platform allowing customers to easily evaluate the features of the MCP1665 device in a typical boost toplogy while also providing a reference for proper choice and layout of components that are critical to switching regulator implementations.
The MCP2030 Bidirectional Communication Demo Kit demonstrates short range bidirectional communication applications using the features of the MCP2030. The demo kit consists of two units: (a) Base Station unit and (b) Transponder unit. The Base Station unit transmits a low frequency (LF) command looking for the transponder in the field. When the transponder unit detects the Base Station command, it responds with its ID and RSSI (Received Signal Strength Indicator) using UHF frequency (434 MHz). When the Base Station unit receives the response from the Transponder unit, it displays the received Transponder ID and RSSI data on the LCD. The features and concepts demonstrated by the demo kit can be used for low frequency (LF) sensing and various hands-free access control security applications. The bidirectional communication range is up to about 3 meters and mainly limited by the property of the LF frequency.
The MCP3221 PICtail™ Demonstration Board is designed to demonstrate Microchip’s MCP3221 device. The demonstration uses DataView™ Windows® software for a graphical real time data analysis from the board through USB. This demo board can also be used for firmware development to the MCP3221 device using the PICkit™ 1 Flash Starter Kit.

The MCP3421 Battery Fuel Gauge Demo Board demonstrates how to measure the battery voltage and discharging current using the MCP3421.

The MCU algorithm calculates the battery fuel being used. This demo board is shipped with 1.5V AAA non-rechargeable battery. The demo board displays the following parameters:

  • Measured battery voltage. 
  • Measured battery discharging current. 
  • Battery Fuel Used (calculated). 

The MCP3421 Battery Fuel Gauge Demo Board also can charge a single-cell 4.2V
Li-Ion battery. This feature, however, is disabled by firmware since the demo kit is shipped to customer with non-rechargeable 1.5V AAA battery.

Please contact Microchip Technology Inc if you want to use the battery rechargeable feature.

The MCP3421 SOT23-6 Evaluation Board (P/N MCP3421EV) contains a MCP3421 18-bit Delta-Sigma Analog-to-Digital Converter (ADC). The MCP3421 is an 18-bit single channel ADC device with various options. The MCP3421 SOT23-6 Evaluation Board has analog input connection pads and VDD, SDA, and SCL test pads. The user can connect any sensor input signal to this evaluation board and test the ADC conversion results.

The PICkit Serial Analyzer’s PC graphic user interface (GUI) provides the user’s interface for writing configuration register bits of the MCP3421 and displays the ADC conversion values. The PICkit Serial Analyzer links between the GUI and the MCP3421 SOT23-6 Evaluation Board, and provides the I2C communication PC to the MCP3421 SOT23-6 Evaluation Board. The user also can use this MCP3421 SOT23-6 Evaluation Board without the PICkit Serial Analyzer by providing the I2C communication signal to the SDA and SCL test pads on the board.

The MCP3421 Weight Scale Demo Board is designed to evaluate the performance of the low-power consumption, 18-bit ADC in an electronic weight scale design. Next to the MCP3421 there is a low-noise, auto-zero MCP6V07 op amp. This can be used to investigate the impact of extra gain added before the ADC for performance improvement. The PIC18F4550 is controlling the LCD and the USB communication with the PC. The GUI is used to indicate the performance parameters of the design and for calibration of the weight scale.

Devices Supported: MCP3421, MCP6V07, PIC18F4550
The MCP3422 Evaluation Board (P/N MCP3422EV) contains an MCP3422 18-bit Delta-Sigma Analog-to-Digital Converter (ADC). The MCP3422 is a 2-channel ADC device with various options. The board has analog input connection pads and various test pads. The user can connect inputs and test the conversion results using the PICkit Serial Analyzer and its PC graphic user interface (GUI).
Thie MCP3423 Evaluation Board is designed for a quick evaluation of the MCP3423 device. The MCP3423 Evaluation Board contains an MCP3423 18-bit Delta-Sigma Analog-to-Digital Converter (ADC). The MCP3423 is a 2-channel 18-bit Delta-Sigma ADC device with various configuration options. The board has analog input connection pads and various test pads. The user can evaluate the MCP3423 by using the PICkit Serial or by connecting to their application boards. The PICkit serial GUI provides the output codes.
The MCP3424 EV Board is a quick and easy evaluation tool for the MCP3424 18-bit four channel Delta-Sigma ADC device. It works with Microchip's popular PICkit™ Serial Analyzer or independently with the customer's applications board.

The user can connect sensor inputs to the MCP3424 Evaluation Board and measure the input voltage. The PICkit™ Serial Analyzer’s PC Graphic User Interface (GUI) displays the ADC output codes. The user will appreciate the simplicity of evaluating the ADC device using this evaluation board.

The customer also can connect the MCP3424 Evaluation Board directly to their applications board and test out their systems functions immediately.

The box for this evaluation board includes only one MCP3424 EV Board. The PICkit™ Serial Analyzer is sold separately.
The MCP3425 SOT23-6 Evaluation Board (P/N MCP4725EV) contains a MCP3425 16-bit Delta-Sigma Analog-to-Digital Converter (ADC). The MCP3425 is an 16 bit single channel ADC device with various options. The MCP3425 SOT23-6 Evaluation Board has analog input connection pads and various test pads. The user can connect any sensor input signal to this evaluation board and test the ADC conversion results. The PICkit™ Serial Analyzer’s PC graphic user interface (GUI) provides user’s interface for configuration register bits of the MCP3425 and displays the ADC conversion values.

The PICkit™ Serial Analyzer links between the GUI and the MCP3425 SOT23-6 Evaluation Board, and provides the I2C communication to the MCP3425 SOT23-6 Evaluation Board. The user also can use this MCP3425 SOT23-6 Evaluation Board without the PICkit™ Serial Analyzer as long as providing the I2C communication signal using the user’s test board.

The MCP3551 Delta-Sigma ADC Demo Board is designed to demonstrate Microchip Technology’s MCP3551 22-Bit Delta-Sigma Analog-to-Digital (ADC) Converter performance using DataView™ software installed on a PC. The demo board can be used with MPLAB® ICD2, PICkit™ 1 Flash Starter Kit, or PICkit™ 2 for developing demonstration/evaluation firmware. Optionally, a second installed MCP3551 can be used with and optional stimulus board (sold separately).

The board is designed to evaluate the MCP3551 with minimum Printed Circuit Board (PCB) noise. The PCB layout practices low-noise design to reduce the signal noise as much as possible in order to demonstrate the 22-Bit performance of the MCP3551.
This 1” by 1” board is designed to demonstrate the performance of the MCP3550/1/3 devices in a simple low-cost application. The circuit uses a ratiometric sensor configuration and uses the system power supply as the voltage reference. The extreme common mode rejection capability of the MCP355X devices, along with their excellent normal mode power supply rejection at 50 and 60 Hz, allows for excellent system performance.

The MCP37X10-200 12-bit Single Channel Evaluation Board (ADM00735) provides the opportunity to evaluate the performance of the MCP37X10-200 Device Family. With the MCP37D10-200, 12-bit 200 Msps single channel pipelined A/D converter on-board, the user can evaluate the functionality of the 12-bit 200 Msps A/D converters and the digital signal processing features. With the help of a compatible data capture card, the evaluation board can provide the user with performance analysis features through the PC GUI.

For proper operation, this evaluation board must be used with the following compatible data capture card:
The MCP3901 ADC Evaluation Board for 16-Bit MCUs system provides the ability to evaluate the performance of the MCP3901 dual channel ADC. It also provides a development platform for 16-bit PIC based applications, using existing 100-pin PIM systems.
The MCP3905A Evaluation board is designed (using the new MCP3905A device) to test out a variety of energy meter designs. On the input side high voltage line and load AC-plug headers are included, along with mounting holes for shunts, current transformers, and screw-type connections for wiring. On the output side a large prototype area is included along with optical isolation and a standard PICtail header for experiment with a variety of PIC-based energy meter designs.

The MCP3905A Energy Meter Reference Design (using the new MCP3905A/06A device) is a stand-alone low cost energy meter. It can act as either a stand alone energy meter, or as the analog front end design for LCD microcontroller based meters. The MCP3905 design is specified with an energy measurement error of 0.1% typical across 1:500 dynamic range for high accurate energy meter designs. This reference design is compliant with EMC requirements per energy metering standards IEC62053 and legacy IEC61036, IEC1046 and IEC687.

The MCP3911 ADC Evaluation Board for 16-Bit MCUs system provides the ability to evaluate the performance of the MCP3911 dual-channel ADC. It also provides a development platform for 16-bit PIC-based applications, using existing 100-pin PIM systems compatible with the Explorer-16 and other high pin count PIC demo boards. The system comes with a programmed PIC24FJ256GA110 PIM module that communicates with the included PC software for data exchange and ADC configuration.
The MCP3911 and PIC18F85K90 Single-Phase Anti-Tamper Energy Meter is a fully functional single-phase meter with enhanced capabilities, such as battery backup, RTC and anti-tamper features. The two current channels are measured with the MCP3911 device and the voltage channel is measured with the 12-bit SAR ADC integrated in the microcontroller. This design has two sensors for the current measurements: a current transformer and a shunt. The PIC18F85K90 microcontroller directly drives the LCD and communicates via UART with the MCP2200, offering an isolated USB connection for meter calibration and access to the device power calculations. The system calculates active and reactive energy, active, reactive and apparent power, power factor, RMS current, RMS voltage and the line frequency. The Microchip Energy Meter Software is used to calibrate and monitor the system.
The MCP3913 ADC Evaluation Board for 16-Bit MCUs system provides the opportunity to evaluate the performance of the MCP3913 six-channel AFE. It also provides a development platform for 16-bit PIC® based applications, using existing 100-pin PIC microcontroller Plug-in Module (PIM) systems that are compatible with the Explorer 16 and other high pin count PIC® based demo boards. The system comes with a programmed PIC24FJ256GA110 PIM module that communicates with the Energy Management Utility software for data exchange and ADC setup via a USB connection to the board.

Devices Supported: MCP3913
The MCP3914 ADC Evaluation Board for 16-Bit MCUs system provides the opportunity to evaluate the performance of the MCP3914 eight-channel AFE. It also provides a development platform for 16-bit PIC® based applications, using existing 100-pin PIC microcontroller Plug-in Module (PIM) systems that are compatible with the Explorer 16 and other high pin count PIC® based demo boards. The system comes with a programmed PIC24FJ256GA110 PIM module that communicates with the Energy Management Utility software for data exchange and ADC setup via a USB connection to the board.
The MCP39F501 Power Monitor Demonstration Board is a fully functional single-phase power monitor. This low-cost design does not use any transformers and requires few external components. The device calculates active power, reactive power, RMS current, RMS voltage, power factor, line frequency and other typical power quantities as defined in the MCP39F501 data sheet. The MCP39F501 Power Monitor Utility software is used to calibrate and monitor the system, and can be used to create custom calibration setups. For some accuracy requirements, only a single point calibration may be needed.

Devices Supported: MCP39F501
The MCP39F511 Power Monitor Demonstration Board is a fully functional single-phase power and energy monitoring system. The system calculates and displays active power, reactive power, RMS current, RMS voltage, active energy (both import and export), and four quadrant reactive energy.

It connects easily through USB to the “Power Monitor Utility Software” that offers automated control to allow you to easily experiment with all system configuration settings such as PWM output frequencies, zero crossing detection options, and event configurations, among many others.

The “MCP39F511 Power Monitor Utility” software can also be used to and be used to create custom calibration setups. For most accuracy requirements, only a single-point calibration is needed. The energy meter software offers an automated calibration process that can be used to quickly calibrate energy meters and allow you to experiment with different calibration procedures.
The MCP39F511N Power Monitor Demonstration Board is a fully functional dual channel single-phase power and energy monitoring system. The system calculates and displays active power, reactive power, RMS current, RMS voltage, active energy (both import and export), and four quadrant reactive energy), on 2 independent channels, simultaneously.

It connects easily through USB to the “Power Monitor Utility Software” that offers automated control to allow you to easily experiment with all system configuration settings such as PWM output frequencies, zero crossing detection options, and event configurations, among many others.

The “MCP39F511N Power Monitor Utility” software can also be used to and be used to create custom calibration setups. For most accuracy requirements, only a single-point calibration is needed. The energy meter software offers an automated calibration process that can be used to quickly calibrate energy meters and allow you to experiment with different calibration procedures.
The MCP39F521 Power Monitor Demonstration Board is a fully functional I2C bus single-phase power and energy monitoring system. Up to four different devices can be placed on the same I2C bus through address select pins. The system calculates and displays active power, reactive power, RMS current, RMS voltage, active energy (both import and export), and four quadrant reactive energy.

It connects easily through USB to the “Power Monitor Utility Software” that offers automated control to allow you to easily experiment with all system configuration settings such as zero crossing detection options and event configurations, among many others.

The “Power Monitor Utility” software can also be used to and be used to create custom calibration setups. For most accuracy requirements, only a single-point calibration is needed. The energy meter software offers an automated calibration process that can be used to quickly calibrate energy meters and allow you to experiment with different calibration procedures.
The MCP401XEV Evaluation Board allows the system designer to quickly evaluate the operation of Microchip Technology’s MCP40D18 Digital Potentiometer device. This device is similar to the following devices:

  • MCP40D17
  • MCP40D19
  • MCP4017
  • MCP4018
  • MCP4019
The board uses the SC70EV Generic PCB and has been populated for the MCP40D18. The 6-pin header (PICkit Serial) has been jumpered to the MCP40D18’s appropriate pins. This allows the PICkit Serial to communicate with the device. The User's Guide includes demonstrations of the PICkit Serial controlling the MCP40D18 device. Additional blank PCBs may be ordered by using the order number: SC70EV. Each SC70EV kit contains 5 PCBs.

Devices Supported: MCP40D18, MCP4017, MCP4018, MCP4019, MCP40D17, MCP40D19
The MCP402xEV is a low cost evaluation board that quickly enables the user to exercise all of the features of the MCP402X Non-Volatile Digital Potentiometer. This kit includes 2 PCBs, one populated & one unpopulated. The populated PCB has an MCP4021-103E/SN digital pot configured as a “windowed” potentiometer using a 2.5kΩ pull-up and a 2.5kΩ pull-down resistor. The PCB supports the 8 pin SOIC, SOT-23-6 and SOT-23-5 MCP402X package variations. A 6 pin PIC10F206-I/OT with FLASH memory is utilized to generate all of the Low-Voltage (LV) and High-Voltage (HV) MCP402X serial commands when the 2 momentary switches are depressed in various sequences. This enables the user to Increment and Decrement the wiper, save the setting to EEPROM & exercise the WiperLocktm feature. The PCB also supports the standard ICSP programming header used by the Microchip BFMP low cost programming tool. The second PCB included in the kit is unpopulated to allow the user to build up the exact combination of components that their application would require.

The MCP42XX Evaluation Board allows the system designer to quickly evaluate the operation of Microchip Technology’s MCP4261 Digital Potentiometer device. The board uses the TSSOP20EV Generic PCB and has been populated for the MCP4261. The 6-pin header (PICkit Serial) has been jumpered to the MCP4261’s appropriate pins. This allows the PICkit Serial to communicate with the device.

Devices Supported: MCP4231, MCP4241, MCP4251, and MCP4261
The MCP42XX PICtail Plus Daughter Board is used to demonstrate the operation of the MCP42XX Digital Potentiometers. The operation of the MCP41XX devices is similar to the MCP42XX devices. Therefore, this demo board can be used as a development platform for either device family.

This board is designed to be used in conjunction with either the PIC24 Explorer 16 Demo Board or the PICkit™ Serial Analyzer.
The MCP43XX Evaluation Board allows the system designer to quickly evaluate the operation of Microchip Technology’s MCP4361 Digital Potentiometer device. The board uses the TSSOP20EV Generic PCB and has been populated for the MCP4361. The 6-pin header (PICkit Serial) has been jumpered to the MCP4361’s appropriate pins. This allows the PICkit Serial to communicate with the device.

Devices Supported: MCP4331, MCP4341, MCP4351, and MCP4361
The MCP46XX Evaluation Board allows the system designer to quickly evaluate the operation of Microchip Technology’s MCP4661 Digital Potentiometer device. The board uses the TSSOP20EV Generic PCB and has been populated for the MCP4661. The 6-pin header (PICkit Serial) has been jumpered to the MCP4661’s appropriate pins. This allows the PICkit Serial to communicate with the device.

Devices Supported: MCP4631, MCP4641, MCP4651, and MCP4661
This daughter board demonstrates the MCP4725 (12 bit DAC with non-volatile memory) features using the Explorer 16 Development Board and the PICkitTM Serial Analyzer.

The MCP4725 SOT-23-6 Evaluation Board is a quick and easy evaluation tool for the MCP4725 12-bit DAC device. It works with Microchip's popular PICkit™ Serial Analyzer or independently with the customer's applications board.


Connect the MCP4725 SOT-23-6 Evaluation Board to the PICkit™ Serial Analyzer and type in the DAC input data in the PICkit™ Serial Analyzer's PC Graphical User Interface program.

The PICkit™ Serial Analyzer will then send the user's data to the DAC device automatically. The DAC's analog output will be available immediately at the output pin. The user will appreciate the simplicity of evaluating the DAC device using this kit.

The customer also can connect the MCP4725 SOT-23-6 Evaluation Board directly to their applications board and test out their systems functions immediately.

The MCP4725 SOT-23-6 Evaluation Board kit includes two of the Evaluation Boards. The PICkit™ Serial Analyzer is sold separately

The MCP4728 Evaluation Board is a tool for quick and easy evaluation of the MCP4728 4-channel 12-bit DAC device. It contains the MCP4728 device and connection pins for the Microchip's popular PICkit™ Serial Analyzer. Simply connect the MCP4728 Evaluation Board to the PICkit™ Serial Analyzer and type in the DAC input data in the PICkit™ Serial Analyzer's PC Graphical User Interface program. The PICkit™ Serial Analyzer will then send the user's data to the DAC device automatically. The new DAC's analog outputs will be available immediately at the DAC output pins. The user will appreciate the simplicity of evaluating the DAC device using this board. The PICkit™ Serial Analyzer is sold separately.

The MCP4xxx Digital Potentiometer Daughter Board allows the system designer to quickly evaluate the operation of Microchip Technology’s MCP42XXX and MCP402X Digital Potentiometers. The MCP42XXX are dual Digital Potentiometer devices that have the same characteristics as their single Digital Potentiometer devices (MCP41XXX). The MCP402x devices are non-volatile devices that have similar characteristics as their volatile memory versions (MCP401X). The board supports two MCP42XXX devices to allow the Resistor Networks to be “stacked” and form a programmable windowed Digital Potentiometer and an MCP402X device, which can be replaced with an MCP401X device. The board has one MCP42010 device (10 kΩ), which can be the rheostats at the ends, and one MCP42010 device (10 kΩ) which is the potentiometer in the middle and a separate standalone potentiometer.

The board also has a voltage doubler device (TC1240A), which can be used to show the WiperLock Technology feature of the MCP4021.

The MCP4XXX Digital Potentiometer Daughter Board has been made configurable, via jumpers. This allows you to determine the configuration that you wish to have the four digital potentiometer of the MCP42XXX devices.

The MCP6L2 and PIC18F66J93 Energy Meter is a fully functional single-phase meter that uses the 12-bit successive approximation analog-to-digital converter (SAR ADC) integrated in the microcontroller. This low-cost design has a shunt as the current sensor. The signal from the shunt is amplified by two external operational amplifiers and applied to the input of the ADC. The PIC18F66J93 directly drives the LCD and communicates via UART with the MCP2200, offering an isolated USB connection for meter calibration and access to the device power calculations. The system calculates active and reactive energy; active, reactive and apparent power; power factor; RMS current; RMS voltage, and line frequency.

Devices Supported: MCP6L2


The Microchip energy meter software is used to calibrate and monitor the system. The calibration can be done in closed loop or open loop. When connected to a stable source of voltage and current, the meter can do an auto-calibration by including the open loop calibration routine and formulas in the firmware.
The MCP9600 Evaluation Board is used to digitize the Thermocouple EMF voltage to degree Celsius with +/-1C accuracy. Users can easily evaluate the all device features using a Type K thermocouple. The device also supports Types J, T, N, E, B, S and R. Each of these types are evaluated by replacing the Type K Thermocouple connector with the corresponding connectors (not included).

In addition, evaluation board connects to PC via USB interface. Temperature can be data-logged using Microchip Thermal Management Software Graphical User Interface (GUI).
The MIC23158/9 Evaluation Board has been developed to evaluate the capabilities of the MIC23158/9 family of devices. The board is populated with the MIC23159 device and it’s set for the following voltages:
•Regulator 1: 1.8V.
•Regulator 2: 1.5V.
The evaluation board can be easily modified by interchanging the MIC23159 device with MIC23158.​
The MIC23158/9 Evaluation Board features independent Enable connectors with individual pull-up resistors.
To check the status of each regulator, power-good connectors are available for each regulator. The board can be powered from two independent voltage sources or a 0Ω resistor can be placed on R3 so that both converters be powered form the same voltage source.
MIC2877 is a compact and highly-efficient 2MHz synchronous boost regulator with a 6.5A switch. It features a bidirectional true load disconnect function which prevents any leakage current between the input and output when the device is disabled. MIC2877 operates in bypass mode automatically when the input voltage is greater than the target output voltage. At light loads, the boost converter goes to PFM mode to improve the efficiency. In shutdown mode, the regulator consumes less than 2uA. MIC2877 also features an integrated anti-ringing switch to minimize EMI, over voltage and over current protection, UVLO and thermal shutdown. MIC2877 is available in a FTQFN22-8LD package with a junction temperature range of -40°C to +125°C.​
MUPB001 is a signal generator for HV7321DB2 (ADM00659) evaluation board.

Mixed Signal PICtail™ Demo Board

Part Number: MXSIGDM

Mature Product
The Mixed Signal PICtail™ Evaluation Board enables quick and accurate evaluation of the performance of several Microchip DACs, ADCs, LDOs, Vrefs and Operational Amplifiers. The board interfaces to the PICkit™ 1 Flash Starter Kit or can utilize the on-board PIC16F767 for “stand-alone” operation. The user can take advantage of the existing PIC® microcontroller library of software routines or develop their own routines. The PIC® microcontroller can select which DAC to configure, which ADC channel to read, and utilize a dual op-amp for various buffer implementations.

The PT100 RTD Evaluation Board demonstrates how to bias a Resistive Temperature Detector (RTD) and accurately measure temperature. Up to two RTDs can be connected. The RTDs are biased using constant current source and the output voltage is scaled using a difference amplifier. In addition to the difference amplifier, a multiple input channel Programmable Gain Amplifier (PGA) MCP6S26 is used to digitally switch between RTDs and increase the scale up to 32 times.

The output of the difference amplifier is connected to a 12-bit differential Analog-to-Digital Converter (ADC) MCP3301. The ADC outputs serial data to the PIC18F2550 using a Serial Peripheral Interface (SPI). The data is transmitted to a PC using a USB interface.

A Graphical User Interface (GUI) is used to acquire the data. The acquired data is graphed as a real-time stripchart display. In addition, the user can select input channels, acquisition interval, and stripchart display buffer size.

The demo board is a complete stand-alone smoke detector application with a smoke chamber emulator. The demo board allows evaluation of all the functions of the RE46C190. Key test points of the device are available at the bottom edge of the demo board. It is designed for battery operation using a CR123A battery or can be operated using a power supply. The RE46C190 application circuit is on the right side of the board by the battery holder and piezo horn and the smoke chamber emulator is on the left. The smoke chamber emulator can be disconnected from the application circuit and a photo smoke chamber or its components can be connected to the demo board.

Devices Supported: RE46C190
The RTD Reference Design demonstrates how to instrument Resistive Temperature Detector (RTD) and accurately measure temperature. This solution uses the MCP3551 22-Bit Analog to Digital Converter (ADC) to measure voltage across the RTD. The ADCand the RTD are referenced using an onboard reference voltage and the ADC inputs are directly connected to the RTD terminals. This provides a ratio metric temperature measurement. The solution uses a current limiting resistor to bias the RTD. It providesa reliable and accurate RTD instrumentation without the need for extensive circuitcompensation and calibration routines.

In addition, this reference design includes a silicon temperature sensor, MCP9804. This sensor is used for comparison only, it is not needed to instrument an RTD. The MCP3551 and MCP9804 outputs are read using a USB PIC® MCU. This controller is also connected to a PC using a USB interface. The Thermal Management software is used to plot the RTD temperature data in stripchart format.

Devices Supported: MCP3551, MCP9804
The Thermocouple Reference Design demonstrates how to instrument a Thermocouple and accurately sense temperature over the entire Thermocouple measurement range. This solution uses the MCP3421 18-Bit Analog-to-Digital Converter (ADC) to measure voltage across the Thermocouple.