CIRCUIT060044
Improved howland current pump circuit
CIRCUIT060044
Overview
The “improved” Howland current pump is a circuit that uses a difference amplifier to impose a voltage across a shunt resistor (Rs), creating a voltage-controlled bipolar (source or sink) current source capable of driving a wide range of load resistance. See the AN-1515 a comprehensive study of the Howland current pump application report for more information on the functionality of the “improved” Howland current pump.
Features
- Input: -5 V to 5 V
- Output: -25 mA to 25 mA
- Supply:
- Vs+ = 15 V
- Vs- = -15 V
- Vref = 0 V
Get started
- Read the circuit design
- Read the application note
Technical documentation
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Type | Title | Date | ||
---|---|---|---|---|
* | Circuit design | “Improved” Howland current pump circuit | PDF | HTML | Aug 7, 2020 |
Application note | Analysis of Improved Howland Current Pump Configurations (Rev. A) | PDF | HTML | Feb 9, 2023 | |
EVM User's guide | OPA547EVM, OPA548EVM User's Guide | Nov 10, 2015 | ||
Application note | AN-1515 A Comprehensive Study of the Howland Current Pump (Rev. A) | Apr 26, 2013 |