PLANO, TX, Sep 17, 2025 – Siemens Digital Industries Software has released Tessent AnalogTest, a software solution that reduces the time needed to create test patterns for analog circuits from months to days. The software enables testing of analog circuitry in integrated circuits (ICs) at higher speeds than traditional methods. Analog circuit testing involves manual coding and the use of expensive mixed-signal test equipment. Used with Tessent DefectSim, Tessent AnalogTest software generates design-for-test (DFT) circuitry and digital test patterns for various analog circuit blocks. These tests run in less than a millisecond on testers, and defect coverage can be verified in simulation up to 1000X faster than specification-based tests.
Tessent AnalogTest provides an automated DFT workflow for analog circuitry in ICs. It generates digital test vectors and estimates test coverage before tape-out. The method uses digital automated test equipment (ATE) to support analog test development. This can lower test costs, improve productivity compared to analog testers, and reduce engineering time. With this approach, IC designers can target and verify more than 90% IEEE P2427-based defect coverage in hours for individual circuit blocks.
“This pioneering software offers rapid test outcomes while delivering higher analog defect coverage and up to 100 times faster tests compared to conventional methods,” said Ankur Gupta, senior vice president and general manager, Digital Design Creation Platform, Siemens Digital Industries Software. “Tessent AnalogTest software represents a monumental leap forward in addressing key quality and cost challenges associated with analog circuit testing, enabling our customers to streamline processes while reducing overall test costs.”
onsemi, Tessent DefectSim customer, used Tessent AnalogTest for a taped-out design. The company achieved over 95% analog defect coverage and reduced test time by more than 100 times compared to traditional methods.
“The biggest challenge in achieving DPPB-level quality in analog and mixed-signal products is the lack of structured Design-for-Test (DFT) and Test Generation methodologies for analog circuits. Tessent AnalogTest is a tool that makes it practical to automatically generate analog DFT solutions and associated tests,” said Steven Gray, senior vice president, new product development, onsemi. “Through our collaboration with Siemens as an early partner, we are optimistic that this methodology will result in shorter development times, much faster tests, and better quality, similar to how scan improved DFT and test for digital circuits.”
The software adds structural test generation by creating simulation testbenches from specification-based tests. It uses ICL and PDL descriptions stated in IEEE P1687.2, the analog extension of the digital IJTAG standard. These tests can verify the analog test flow and measure defect coverage for algorithmic trimming, top-up parametric tests, and ISO 26262 functional safety metrics. Embedding the scan tests can further enhance those metrics.
Source: Siemens
About Siemens Digital Industries Software
Siemens Digital Industries Software delivers integrated tools and services to support digital transformation across engineering and manufacturing workflows. Its offerings help companies streamline product design, optimize manufacturing, and manage operational data more effectively. The company serves sectors such as automotive, aerospace, industrial equipment, electronics, and consumer goods. Its work in areas like product lifecycle management (PLM) and manufacturing systems plays a key role in advancing digital continuity and efficiency. Headquartered in Plano, TX, it operates as a business unit of Siemens AG.
About onsemi
onsemi is a semiconductor manufacturer headquartered in Scottsdale, AZ, and was founded in 1999. The company designs and produces intelligent power and sensing technologies, including discrete power devices such as MOSFETs, IGBTs, and silicon carbide (SiC) modules, along with power management, analog and mixed-signal chips, sensors, and custom semiconductor solutions. Its products are used across automotive applications such as powertrain systems, vehicle electrification, driver-assistance systems, and safety electronics, as well as in industrial automation, energy infrastructure, telecommunications, data centers, aerospace, defense, and medical equipment. onsemi operates 19 manufacturing facilities and 43 design centers worldwide, employing about 26,000 people. The company reported approximately $7B in revenue in 2024, positioning it as a major supplier in the global semiconductor market.