Datasheet

19
Signal Chain Design Guide
Development Tools
These following development boards support the
development of signal chain applications. These product
families may have other demonstration and evaluation
boards that may also be useful. For more information visit
www.microchip.com/analogtools.
Reference Designs
Battery
MCP3421 Battery Fuel Gauge Demo
(MCP3421DM-BFG)
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
board can also charge a single-cell 4.2V Li-Ion battery.
Pressure
MCP3551 Tiny Application (Pressure) Sensor Demo
(MCP355XDM-TAS)
This 1" × 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.
MCP3551 Sensor Application Developer’s Board
(MCP355XDV-MS1)
The MCP355X Sensor Developer’s Board
allows for easy system design of high
resolution systems such as weigh scale,
temperature sensing, or other small
signal systems requiring precise signal
conditioning circuits. The reference design includes LCD
display firmware that performs all the necessary functions
including ADC sampling, USB communication for PC data
analysis, LCD display output, zero cancellation, full scale
calibration, and units display in gram (g), kilogram (kg) or
ADC output units.
Photodiode
MCP6031 Photodiode PICtail Plus Demo Board
(MCP6031DM-PTPLS)
The MCP6031 Photodiode PICtail Plus
Demo Board demonstrates how to use a
trans impedance amplifier, which consists
of MCP6031 high precision op amp and
external resistors, to convert photo-current
to voltage.
Temperature Sensors
Thermocouple Reference Design (TMPSNSRD-TCPL1)
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.
MCP6V01 Thermocouple Auto-Zero Reference
Design (MCP6V01RD-TCPL)
The MCP6V01 Thermocouple Auto-
Zeroed Reference Design demonstrates
how to use a difference amplifier system
to measure electromotive force (EMF)
voltage at the cold junction of thermocouple in order to
accurately measure temperature at the hot junction. This
can be done by using the MCP6V01 auto-zeroed op amp
because of its ultra low offset voltage (Vos) and high
common mode rejection ratio (CMRR).
RTD Reference Design Board (TMPSNSRD-RTD2)
The RTD Reference Design demonstrates
how to implement 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 ADC and 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 provides a
reliable and accurate RTD instrumentation without the need
for extensive circuit com pensation and calibration routines.
MCP6N11 and MCP6V2X Wheatstone Bridge
Reference Design (ARD00354)
This board demonstrates the performance
of Microchip’s MCP6N11 instrumentation
amplifier (INA) and a traditional three op
amp INA using Microchip’s MCP6V26 and
MCP6V27 auto-zeroed op amps. The input
signal comes from an RTD temperature
sensor in a Wheatstone bridge.