SSTDR-ASIC | An Integrated Circuit Time Domain Reflectometer
What an Integrated Circuit Time Domain Reflectometer is:
The LiveWire SSTDR-ASIC is a cutting edge integrated circuit that detects and locates intermittent fault conditions in high noise environments (e.g. live electrical power circuits, communication lines, sensors and safety systems, various types of concrete/steel structures) in real time.
How an Integrated Circuit Time Domain Reflectometer Works:
The LiveWire ASIC can be integrated with your technology to reduce maintenance / troubleshooting / monitoring costs, increase system reliability, and can extend the useful life of assets by providing accurate real time monitoring. LiveWire’s unique core technology is Spread Spectrum Time Domain Reflectometry, or SSTDR. The technological foundation of cell phone communications, spread spectrum is used to transmit a small but nevertheless recognizable signal in a high noise environment. By combining spread spectrum with TDR technology, LiveWire has achieved a significant breakthrough in being able to monitor changes in wiring systems, in real time. Changes that occur for as brief a time period as one millisecond can be detected, characterized, and located (distance to fault) within an accuracy of +/- 2% over distances from a few inches to hundreds of meters.
Who Uses It:
The LiveWire SSTDR-ASIC is used in a variety of situations, including aging aircraft, electrical power utility grids, construction and mining equipment and vehicles and many more. To see a more comprehensive list of applications, click here.
Key Features:
- Small form factor easily integrates into existing products.
- Reduces maintenance costs for existing assets by pinpointing the location of intermittent fault conditions live during operation.
- Increases the LTV of assets by keeping them in service longer and with fewer problems.
- Increases safety and reduces downtime.
- Works on systems of all types and sizes (power, communications, sensors, etc..)
Technical Specifications:
- Spread Spectrum Time Domain Reflectometry (SSTDR)
- Continuous Monitoring 1 Channel:
- Scans Wire ~3000 scans/sec
- Multiplexed Monitoring 4 Channels
- Each wire between ~2000 scans/sec and ~500 scans/sec
- 1 Differential Receiver Channel
- SPI mode 0 or 3 Interface – 24 MHz Nominal up to 48MHz max
- Digital Control Interface
- Arc Fault Capture Mode
- Test Frequencies: 1.5 MHz to 96MHz
- Covers wide range of cable lengths
- LWA-1001N = 8mm X 8mm Leadless Package (QFN)
Operating Characteristics:
- 3.3 VDC +/- 5% @ ~175 mA Typical
- Ambient Operating Temperature of -40 °C to +105°C
- 4kV Human Body Model (HBM) ESD protection levels
- Transmit voltage level 2mV to 500mV peak to peak
- 24 MHz Crystal/Oscillator
- 2 KB SRAM Cache Holds 10 scans
- Internal Power On Reset
