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Current Sense Amplifier

 

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Introduction:

High side current sense amplifier. Bi-direction. Attaches directly to Deltec MKA shunt or similar. Amplifies shunt voltage by 20 times and adds a 2.5 volt offset. Also provides a voltage sense wire. All wires are fused with 0.125 amp fuses. Amplifier comes standard with 5 foot shielded 24 AWG 300V wire. Can be ordered with no wire or custom length wire. Conformal coating is available as an option. Shunt not included — see accessories below.

Wire color codes and functions:

  • Red: +5 volts
  • White: Volt sense (connected to + on shunt)
  • Green: Current sense
  • Black: Ground

Transfer Function:

There are two parameters you need to calculate the transfer function between voltage output of current sense amplifier and current flowing through the shunt:
  1. vdrop or rated voltage drop across shunt.
  2. irated or rated current of the shunt.
Using those values, calculate:
m = irated / ( vdrop * 20 )
b = m * -2.5
m and b are used in the equation:
i = m * vsensor + b
Example with sensor outputting 3.75 volts with a 100 amp / 100mV shunt:
m = ( 100 / ( 0.100 * 20 ) ) = 50
b = 50 * -2.5 = -125
i = 50 * 3.75 + -125 = 62.5 amps

This product is based around an Analog Devices ADR8210.

Pricing:

Current sense amplifier, high side, 20x gain, 0 to 60 volts
Product Photo
Click on photo to enlarge
US Price: $30.00 USD
Please call us at +1-507-454-2727 to place an order.

Or click here to order online from Off Grid Options .

High side current sense amplifier. Bi-direction.

This product is based around an Analog Devices ADR8210. Shunt not included.


Part Number: APRS6576
Shipping Weight: 0.13 pounds
RoHS: compliant
Origin: USA

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Accessories:

Shunt, 20A, 100mV
Product Photo
Click on photo to enlarge
US Price: $30.00 USD
Please call us at +1-507-454-2727 to place an order.

Or click here to order online from Off Grid Options .

MKA type shunt. 20A, 100mV.

Note: Shunt is rated for 20A peak. Recommend no more than 13.3A for continuous operation.


Part Number: APRS6580
Shipping Weight: 0.22 pounds
RoHS: compliant
Origin: USA
Shunt, 50A, 100mV
Product Photo
Click on photo to enlarge
US Price: $30.00 USD
Please call us at +1-507-454-2727 to place an order.

Or click here to order online from Off Grid Options .

MKA type shunt. 50A, 100mV.

Note: Shunt is rated for 50A peak. Recommend no more than 33.3A for continuous operation.


Part Number: APRS6581
Shipping Weight: 0.22 pounds
RoHS: compliant
Origin: USA
Shunt, 100A, 100mV
Product Photo
Click on photo to enlarge
US Price: $30.00 USD
Please call us at +1-507-454-2727 to place an order.

Or click here to order online from Off Grid Options .

MKA type shunt. 100A, 100mV.

Note: Shunt is rated for 100A peak. Recommend no more than 66.6A for continuous operation.


Part Number: APRS6582
Shipping Weight: 0.22 pounds
RoHS: compliant
Origin: USA

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In order to improve design and supply the best product possible, specifications may change without notice.