Analog Comparator Board: 2 Channels
- Two non-inverting analog comparator channels with open-drain outputs
- Easily set independent rising and falling threshold voltages
- Thresholds may be set with onboard potentiometers (2 per channel), or may be provided externally
- LEDs provide visual indication for each state and power
- Wide operating voltage range (3.3V to 24V)
- Buffered output stage for higher current sink capability
- Mounting Options: Rubber Feet, Panel, or DIN Rail
General Description
An analog comparator constantly compares the voltage of an input signal to a reference voltage and provides a digital "high" or "low" output to indicate whether the input voltage is above or below the threshold. The CMPA102 comparator board provides two channels of comparator functions with a non-inverting open-drain protected output for each channel. Hysteresis is easily controlled with separate high and low threshold voltages. Each threshold may be set using the onboard potentiometers, or thresholds may be provided externally by the user. Input signal range includes the input-side supply rail and ground, without the need to use voltage dividers. The CMPA102 is suitable for use with supply voltages of anywhere from 3.3V to 24V. This robust design includes protected low-side output drivers that provide significant sink current capability. Reverse-polarity protection on inputs and outputs is also included.
This board includes terminal blocks to provide convenient access to the signals.
Click image to enlarge.Applications
- Monitoring sensor signals (fluid level, temperature, pressure, etc)
- Low-side driver for small DC loads (motors, solenoids, bulbs, etc)
- Simple closed-loop hysteretic control
- Interface between equipment with different logic levels
- Driving a load that could be subjected to fault conditions (e.g., overcurrent, short to supply)
A comparator is sometimes referred to as a "threshold detector" or "hysteretic controller."
Product Documents
| Part # | Description | Data Sheet |
|---|---|---|
| CMPA102-x | 2-Channel analog comparator board datasheet | 
|
2-Channel analog comparator board datasheet
Mounting Options
These products are available in two different mounting variants. Product numbers ending with -DIN come with DIN clips already installed and ready to snap onto 35mm or 32mm DIN rail. Product numbers ending with -FT have stick-on rubber feet installed on the bottom side, allowing for benchtop use or panel mounting. For panel mounting, we suggest 1/4" nylon standoffs under the mounting holes, and #6 screws.
CMPA102-DIN
Click image to enlarge. Rail not included
CMPA102-FT
Click image to enlarge.Product Details
- Two non-inverting analog comparator channels with open-drain outputs
- Easily set independent rising and falling threshold voltages
- Thresholds may be set with onboard potentiometers (2 per channel), or may be provided externally
- Hysteresis is independent of output-side supply voltage and loading
- Deterministic start-up state
- LEDs provide visual indication for each state and power
- Rail-to-Rail input signal voltage range includes ground and input supply rail
- If desired, easily use separate supplies for input supply and output supply
- Wide operating voltage range (3.3V to 24V)
- Buffered output stage for higher current sink capability
- Output stage includes current limit and thermal limit features
- Includes reverse-polarity protection on inputs and outputs
- Redundant ground connections at terminal block
- Approximate dimensions: 3.3" x 2.3"
- Mounting Options: Rubber Feet, Panel, or DIN Rail
Pricing and Ordering
| Product # | Description | 1+ | 10+ | RoHS | Buy Now |
|---|---|---|---|---|---|
| CMPA102-DIN | Comparator Board, Protected Outputs, 2 Channels, DIN | $68.05 | $64.05 | Yes | |
| CMPA102-FT | Comparator Board, Protected Outputs, 2 Channels, Feet | $66.35 | $62.35 | Yes |
| Quantity | Price |
|---|---|
| 1+ | $68.05 |
| 10+ | $64.05 |
| Quantity | Price |
|---|---|
| 1+ | $66.35 |
| 10+ | $62.35 |
All of the above items are normally stocked. Please call us if you need to verify availability for a specific quantity, or for pricing at higher quantities. Please visit our ordering page for our ordering policies and a list of ordering methods.