Home
Design & development

CIRCUIT060014

Voltage-to-current (V-I) converter circuit with MOSFET

CIRCUIT060014

Overview

This single-supply, low-side, V-I converter delivers a well-regulated current to a load which can be connected to a voltage greater than the op amp supply voltage. The circuit accepts an input voltage between 0 V and 2 V and converts it to a current between 0 mA and 100 mA. The current is accurately regulated by feeding back the voltage drop across a low-side current-sense resistor, R3, to the inverting input of the op amp.
Features
  • Single 5-V supply
  • Input: 0 V to 2 V
  • Output: 0 mA to 100 mA
General-purpose op amps
TLV9042 — Dual, 5.5-V, 350-kHz, Ultra-low 1.2-V, low quiescent current (10-μA) op amp TLV9062 — Dual, 5.5-V, 10-MHz operational amplifier
4-20mA signal conditioners
XTR111 — Voltage-to-current converter/transmitter with 3-V to 15-V regulator and resistor set I/O ratio
Download View video with transcript Video

Technical documentation

star
= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 5
Type Title Date
* Application note Voltage-to-current (V-I) converter circuit with MOSFET (Rev. A) PDF | HTML 20 Aug 2021
E-book Analog Engineer’s Circuit Cookbook: Amplifiers (Rev. C) 18 Dec 2023
Circuit design Voltage-to-current (V-I) converter circuit with BJT PDF | HTML 14 May 2021
Application note AN-31 Amplifier Circuit Collection (Rev. D) 21 Oct 2020
User guide TIPD102 Verified Design Reference Guide 19 Sep 2013

Related design resources

Design tools & simulation

SIMULATION TOOL
PSPICE-FOR-TI — PSpice® for TI design and simulation tool TINA-TI — SPICE-based analog simulation program
CALCULATION TOOL
ANALOG-ENGINEER-CALC — Analog engineer's calculator

Reference designs

REFERENCE DESIGN
TIPD101 — Low side V-I converter reference design, 0-V to 5-V input, 0-mA to 500-mA output TIPD102 — High side V-I converter reference design from 0 V to 2 V and 0 mA to 100 mA, 1% full-scale error

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support.

Videos