FilterLab provides the flexibility to select filter types and topologies, specify component tolerances and optimize the design based on your needs. It includes downloadable schematic diagrams of the filter circuit with component values and a complete Bill of Materials (BoM) to accelerate your design.
The PSRR and Digital Noise Evaluation Board (104-00139) is designed to explore and quantify the effects of power and digital noise on system performance. These experiments will help system designers understand the impact that power and digital noise can have in their design.
The PSRR and Digital Noise Evaluation Board supports measurement of Power Supply Rejection Ratio (PSRR) performance of Operational Amplifiers, as well as illustrates effects of Digital Interface spikes on Chip Select pins (and VDD, VOUT, VIN pins). The various measurements demonstrate importance of IDDQ on PSRR and Digital Noise performance.
A variety of Op Amps and Low Dropout regulators, and one Switching Regulator, plus selectable low-pass RC filters in VDD, allow the student to evaluate output (sinusoidal) noise versus sinusoidal frequency.
The PCB uses individual Gain=100 Op Amp circuits, plus Gain=10 output coaxial driver, achieving an referred-to-input resolution of 1 microvolt or less.
The PCB generates 0.25volt Digital Spikes, with 1nanoSec edges, for injection into an Op Amp. With DVM monitoring, sub-microvolt effects are easily observed.
An un-populated SMA footprint allows Radio Frequency injection, to examine Op Amp behavior with modulated BlueTooth or Cell Phone signals.
The MCP6SX2 PGA Thermistor PICtail Demo Board features the MCP6S22 and MCP6S92 Programmable Gain Amplifiers (PGA). These devices help:
Overcome the non-linear response of the on-board NTC thermistor
Provide multiplexing between two inputs; the other input can be any desired source. This opens the possibilities of temperature correcting another sensor, and of increasing the number of PIC® microcontroller I/O pins available for other purposes.
Two on-board variable resistors allow users to experiment with different designs on the bench. DIP switches on the board select certain resistors (in a binary weighted sequence) to add together, thereby emulating the series resistor in the voltage divider and the thermistor’s change in resistance over temperature.
A complete solution is achieved by interfacing this board to the PICkit™ 1 Flash Starter Kit (see DS40051) and the Signal Analysis PICtail™ Daughter Board (see DS51476). The solution provides:
PC software interface
PICmicro microcontroller
Firmware programmability
10-bit ADC (on the microcontroller)
Firmware (with re-locatable assembler code) for the microcontroller.
This board supports the capacitive humidity sensor application note AN1016. It measures the capacitance of a relative humidity sensor plugged into the board. The on-board microcontroller sends the measured and calculated relative humidity (RH) to a PC for display.
The board can also measure small capacitors in different ranges of values using a dual slope integration method. The board can be modified, if desired, to achieve better measurement resolution.
This is a blank PCB that allows the operation of Microchip Technology’s 8-pin devices to be easily evaluated. Each device pin is connected to a pull-up resistor, a pull-down resistor, an in-line resistor, and a loading capacitor. The PCB pads allow through hole or surface mount connectors to be installed to ease connection to the board. Additional passive component footprints are on the board, to allow simple circuits to be implemented.
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