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 $
Elecrow community is a shared platform and we are not responsible for any design issues.

PCB Assembly

PCBA Qty: BomFile:
NO. OF UNIQUE PARTS: NO. of Components:
Assembly Cost: US $
Elecrow community is a shared platform and we are not responsible for any design issues.
Add to cart
3dPrintingFile : Size :
Unit : Volumn :
3D Printing Qty : Material :
Total: US $12.99
Elecrow community is a shared platform and we are not responsible for any design issues.
Add to cart
Acrylic Type : AcrylicFile :
Dimensions: Engrave:
Acrylic Qty :
Acrylic Thickness:
Acrylic Color:
Total: US $12.99
Elecrow community is a shared platform and we are not responsible for any design issues.
closed
user-img

Miroslav Hancar

Published: Sep 30,2024

Battery-powered current sense amplifier

A highly configurable, low-power current probe.

ccc ccc
Copyright Info

Attribution-ShareAlike (CC BY-SA)

Read More⇒
  177
  1
  0
cover-img
 
  • 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)

user-img

Miroslav Hancar

+ Follow

Topic

View All
Current Sensing probe amplifier opamp shunt pcb diy battery ammeter transducer
  • Comments( 0 )
  • Like( 1 )
/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