Low-Level V-to-I Converter Reference Design, 0V to 5V input to 0uA to 5uA output
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

Description & Features

Technical documentation

Support & Training

Order Now

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Key Document


This Verified Design is a micro-Amp voltage-to-current (V-I) converter circuit that delivers a precise low level current to a load. The design operates on a single 5V supply and uses a precision low drift op-amp, and instrumentation amplifier. Simple modification can change the range and accuracy of the V-I converter.

See more TI Precision Designs

  • Translates Voltage to current: 0 to 5V, 0uA to 5uA
  • Error: 0.3% max uncalibrated, 0.01% max calibrated
  • Single-Supply Solution
  • Utilizes INA326 RRI/O Instrumentation Amplifier
This verified design includes:
  • Theory
  • Component Selection
  • TINA-TI Simulation
  • Verification and Measured Performance
  • Modification Options

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Test Data

Get results faster with test and simulation data that's been verified.

Download Test Data

Design Files

Download ready-to-use system files to speed your design process. Get Viewer.

Download Design Files

TI Devices (2)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
INA326  Precision, Low Drift, CMOS Instrumentation Amplifier  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
OPA333  1.8-V, 17-µA, microPower, precision, zero-drift CMOS op amp  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
INA326 Download Download
OPA333 Download Download
Download Download
Download Download

Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

Step 1: Download and install the free download.

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.

Technical documentation

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guide (1)
Title Type Size (KB) Date
PDF 1006 19 Sep 2013
Design files (4)
Title Type Size (KB) Date
PDF 185 09 Apr 2015
ZIP 505 09 Apr 2015
ZIP 161 19 Sep 2013
PDF 74 19 Sep 2013
Related Tools & Software

Design tools & simulation (1)

Name Part Number Tool Type
SPICE-based analog simulation program  TINA-TI  Simulation tool 

Software development (1)

Support & training

TI E2E™ forums with technical support from TI engineers

Search our extensive online knowledge base where millions of technical questions and answers are available 24/7.

Search answers from TI experts

Content is provided 'AS IS' by the respective 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 visit our Support page.

Technical articles