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reference designPGA855 | Demoboard TIDA-010945

Texas Instruments PGA855 | Demoboard TIDA-010945

Precision signal chain for digital multimeters reference design

Overview

TopologyOther Topology
Input voltage0-32.77 V

Description

This reference design explains the theory, design and testing of a high-performance signal chain for DC measurements. The main target application is digital multimeters (DMMs), however the design can also be applicable to other applications, such as data acquisition (DAQ) and condition monitoring. This design achieves high-DC accuracy using a high-performance 24-bit analog-to-digital converter, ADS127L21 and a low-noise programmable gain amplifier, PGA855, with a typical nonlinearity of ±2.4ppm and low drift over temperature. These devices are highly integrated, simplifying the overall signal chain design.

Features

  • Excellent DC performance, enabling high accuracy
  • Highly-integrated components, simplifying signal chain design
  • Wide input range due to the input programmable gain filter

Typical applications

  • Test and measurement, Data acquisition (DAQ), Factory automation and control, Analog input module, Semiconductor test

More information

Products

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Tol. C
VR(V (DC))
Size
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DF(%)
RISO
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Fl(mm)
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Ø ID(mm)
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885012206095
SPECWCAP-CSGP MLCCs 50 V(DC), 100 nF, ±10%
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 50 V(DC)
Capacitance100 nF
Capacitance±10% 
Rated Voltage50 V (DC)
Size0603 
Operating Temperature -55 °C up to +125 °C
Dissipation Factor3 %
Insulation Resistance5 GΩ
Ceramic TypeX7R Class II 
Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.4 mm
Packaging7" Tape & Reel 
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Packaging Unit4000 
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9774050360R
SPECWA-SMSI SMT Steel Spacer with internal Thread M3, –, –
Simu­lation–
Availability
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWA-SMSI SMT Steel Spacer with internal Thread M3
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Operating Temperature -55 °C up to +150 °C
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Length5 mm
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PackagingTape and Reel 
Inner ThreadM3 
Inner Diameter4.2 mm
Outer Diameter6 mm
Packaging Unit650 
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