TIPD154

Low-Power Reference and Bipolar Voltage Conditioning Circuit Reference Design for Low-Power ADCs

TIPD154

Design files

Overview

This TI Precision Verified Design provides the theory, component selection, and simulation for a single-supply, low-power signal conditioning circuit designed to translate a +/-5 V input signal to the proper input range of a single-supply low-power 16-Bit ΔΣ ADC such as the one inside the MSP430 or other similar single-supply ADCs.  A zero-drift op amp was selected to provide excellent dc performance in the attenuation and level-shifting circuit.  Two low-power reference circuits are used to provide power, the ADC reference voltage, and biasing to the input conditioning circuit.

Features

• TI Precision Designs: Verified Design Contains Theory, Component Selection, TINA-TI Simulation
• Conditions a +/-5V signal input signal for a 1.25V ADC
• Total operational current < 100 μA
• Single-Supply Solution

Design files & products

Design files

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

TIDR877.PDF (86 K)

Detailed schematic diagram for design layout and components

TIDC309.ZIP (467 K)

Detailed schematic diagram for design layout and components

TIDR878.PDF (90 K)

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

TIDC509.ZIP (322 K)

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

Products

Includes TI products in the design and potential alternatives.

Precision op amps (Vos<1mV)

OPA317Low Offset, Rail-to-Rail I/O Operational Amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML
Series voltage references

REF33121.25-V, 30-ppm/°C drift, 3.9-µA, 3-pin SOT-23, 3-pin SC70, 8-pin UQFN voltage reference

Data sheet document-pdfAcrobat PDF open-in-new HTML
Series voltage references

REF333030-ppm/°C drift, 3.9µA, 3-pin SOT-23, 3-pin SC70, 8-pin UQFN series voltage reference

Data sheet document-pdfAcrobat PDF open-in-new HTML

Start development

Software

Support software

TIPD154 Simulation — TIDC015.ZIP (45 K)

Support software

TIPD154 Test Files — TIDC510.ZIP (19 K)

Technical documentation

star
= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* User guide Low-Power Reference and Bipolar Voltage Conditioning Circuit for Low-Power ADCs Mar. 06, 2014

Related design resources

Design tools & simulation

SIMULATION TOOL
TINA-TI SPICE-based analog simulation program

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