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TIPD135

10 µA to 100 mA, 0.05% error, high-side current sensing reference design

Design files

TIPD135

Design files

Overview

This precision verified design provides the theory, component selection, simulation, complete PCB schematic and layout, bill of materials, and measured performance of a split-supply, high-side four decade current sensing solution that can accurately detect load currents from 10uA-100mA. The corresponding linear output is from 10mV to 4.9V which enables measurement by common 5V ADCs. The design utilizes the PGA281, an instrumentation amplifier with pin-programmable gain and a wide common-mode voltage range, to provide a more accurate and versatile solution than traditional op amps.

Features
  • High-Side, Four Decade, Bi-directional, Current Sensing Verified Solution
  • Senses Current from 10uA-100mA with <0.05% Error
  • Supports up to ±12.5V Common-mode Input Range
  • 10mV to 4.9V output for measurement by common 5V ADCs
  • Utilizes PGA281 pin-programmable gain instrumentation amplifier to achieve four decade current measurement

This Verified Design Includes:

  • Theory
  • Component Selection
  • TINA-TI Simulation
  • Schematics and PCB Layout
  • Verification and Measured Performance
  • Modification Options
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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

download Bill of materials (BOM) — TIPD135
TIDR144.PDF (189 KB)

Complete listing of design components, reference designators, and manufacturers/part numbers

download Gerber file — TIPD135
TIDC001.ZIP (681 KB)

Design file that contains information on physical board layer of design PCB

download Schematic — TIPD135
TIDC030.ZIP (3468 KB)

Detailed schematic diagram for design layout and components

download Schematic — TIPD135
TIDR143.PDF (145 KB)

Detailed schematic diagram for design layout and components

Products

Includes TI products in the design and potential alternatives.

Linear & low-dropout (LDO) regulators

TPS7A4101 — 50-mA, 50-V, low-IQ, adjustable low-dropout voltage regulator with enable

Data sheet: PDF | HTML
Programmable & variable gain amplifiers (PGAs & VGAs)

PGA281 — Zero-Drift, High Voltage Programmable Gain Amplifier

Data sheet: PDF

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Software

Support software

TIDC002 — TIPD135 Simulation

Supported products & hardware

Supported products & hardware

Hardware development
Reference design
TIPD135 — 10 µA to 100 mA, 0.05% error, high-side current sensing reference design
Download options

TIDC002 — TIPD135 Simulation

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Version: 01.00.00.00
Release date: Oct 2, 2013
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TIPD135 Simulation (zip)  — 2475 K

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Hardware development
Reference design
TIPD135 — 10 µA to 100 mA, 0.05% error, high-side current sensing reference design

Release Information

The design resource accessed as www.ti.com/lit/zip/tidc002 or www.ti.com/lit/xx/tidc002/tidc002.zip has been migrated to a new user experience at www.ti.com/tool/download/TIDC002. Please update any bookmarks accordingly.
Support software

TIDC003 — TIPD135 Test Files

Supported products & hardware

Supported products & hardware

Hardware development
Reference design
TIPD135 — 10 µA to 100 mA, 0.05% error, high-side current sensing reference design
Download options

TIDC003 — TIPD135 Test Files

close
Latest version
Version: 01.00.00.00
Release date: Oct 2, 2013
open-in-new

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download

TIPD135 Test Files (zip)  — 252 K

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Hardware development
Reference design
TIPD135 — 10 µA to 100 mA, 0.05% error, high-side current sensing reference design

Release Information

The design resource accessed as www.ti.com/lit/zip/tidc003 or www.ti.com/lit/xx/tidc003/tidc003.zip has been migrated to a new user experience at www.ti.com/tool/download/TIDC003. Please update any bookmarks accordingly.

Technical documentation

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Type Title Date
User guide 10-uA to 100-mA 0.05%-Error High-Side Current Sensing Design Guide Oct 3, 2013

Support & training

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