Holiday Notice: Elecrow will be on holiday starting January 26th (GMT+8). the last shipment day for service orders is January 21st. Orders can still be placed during the holiday, but deliveries will be delayed. [Learn More]

user-img

Miroslav Hancar

  • 5 Projects
  • 3 Followers
  • Sep 30,2024
+ Follow

Battery-powered current sense amplifier

A highly configurable, low-power current probe.

Battery-powered current sense amplifier
 
  • thumbnail-img
  • thumbnail-img
  • thumbnail-img
  • thumbnail-img
  • thumbnail-img
  • thumbnail-img
 

Story

The overall gain (V/A) can be adjusted across a wide range by combining the gains of individual opamps and the value of the shunt resistor. Cascading two lower-gain opamps allows for increased bandwidth compared to using a single opamp with high gain. The amplifier is powered by either a CR2032 battery or its rechargeable counterpart, the LIR2032, with the negative rail of the symmetrical power supply generated by an LM2664 charge pump. Diodes D1 and D2 are optional and serve to reduce the supply voltage to meet the operational amplifiers' working range, typically 5.5V. IC4 and LED1 provide an optional indicator for battery depletion. I designed the PCB layout for the opamps in SOT23-5 packages, accommodating both normal and reverse pinouts.

Current consumption: 2,2mA @ 3V
Bandwidth (-3dB): 55kHz (2 x MCP6V81U, first stage gain: 100, second stage gain: 10)

Battery-powered current sense amplifier

A highly configurable, low-power current probe.

269
 
2
0
7

Share your project on social media to expand its influence! Get more people to support it.

  • Comments( 0 )
  • Like( 2 )
/1000
Upload a photo:
You can only upload 1 files in total. Each file cannot exceed 2MB. Supports JPG, JPEG, GIF, PNG, BMP

You May Also Like

View All
Add to cart
Board Type : GerberFile :
Layer : Dimensions :
PCB Qty :
Different PCB Design
PCB Thickness : PCB Color :
Surface Finish : Castellated Hole :
Copper Weight : 1 oz Production Time :
Total: US $
As a sharing platform, our community will not bear responsibility for any issues with this design and parameters.

PCB Assembly

PCBA Qty: BomFile:
NO. OF UNIQUE PARTS: NO. of Components:
Assembly Cost: US $
As a sharing platform, our community will not bear responsibility for any issues with this design and parameters.
Add to cart
3dPrintingFile : Size :
Unit : Volumn :
3D Printing Qty : Material :
Total: US $12.99
As a sharing platform, our community will not bear responsibility for any issues with this design and parameters.
Add to cart
Acrylic Type : AcrylicFile :
Dimensions: Engrave:
Acrylic Qty :
Acrylic Thickness:
Acrylic Color:
Total: US $12.99
As a sharing platform, our community will not bear responsibility for any issues with this design and parameters.
Add to cart
CNC Milling File : Size:
Unit: Volumn:
CNC Milling Qty : Material:
Type of Aluminum: Surface Finish:
Tolerance:
Surface Roughness:
Total: US $12.99
As a sharing platform, our community will not bear responsibility for any issues with this design and parameters.
Add to cart
Item Price Qty Subtotal Delete
Total: US $0.00
As a sharing platform, our community will not bear responsibility for any issues with this design and parameters.