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Texas Instruments PGA855 | Demoboard TIDA-010945
Precision signal chain for digital multimeters reference design
Overview
| Topology | Other Topology |
| Input voltage | 0-32.77 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 accuracyHighly-integrated components, simplifying signal chain designWide input range due to the input programmable gain filter
Typical applications
- Semiconductor test
- Analog input module
- Factory automation and control
- Test and measurement
- Data acquisition (DAQ)
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR (V (DC)) | Size | Operating Temperature | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | H (mm) | Fl (mm) | Packaging | Ti | Ø ID (mm) | Ø OD (mm) | Qty. | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 885012206095 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 100 nF | ±10% | 50 | 0603 | -55 °C up to +125 °C | 3 | 5 GΩ | X7R Class II | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | – | – | – | 4000 | ||
 | 9774050360R | SPEC | – | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WA-SMSI SMT Steel Spacer with internal Thread M3 | – | – | – | – | -55 °C up to +150 °C | – | – | – | 5 | – | – | – | Tape and Reel | M3 | 4.2 | 6 | 650 |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 885012206095 | SPEC | |
| 9774050360R | SPEC | – |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR (V (DC)) | Size | Operating Temperature | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | H (mm) | Fl (mm) | Packaging | Ti | Ø ID (mm) | Ø OD (mm) | Qty. | Samples |
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