Module connects sensors to 12-bit oscilloscopes

-October 11, 2017

This product is featured in EDN's Hot 100 products of 2017. See all 100 here.
When troubleshooting and debugging electromechanical systems, you often need to read sensor outputs, preferably on an oscilloscope. That's where the Sensor Acquisition Module (SAM40) from Teledyne LeCroy comes in.

Available in 8, 16, and 24-channel models, the SAM40 adds sensor inputs to Teledyne LeCroy's HDO series of four-channel or eight-channel 12-bit oscilloscopes. Each sensor channel has 24-bit resolution and 100 kHz bandwidth. Sample rate is 100 ksamples/s. Each channel has an input filter that you can apply to reduce noise.

You can connect any kind of sensor with a voltage output and a BNC connector to any of the SAM's channels. Your traces can then appear in any of 65 engineering units or you can create your own.

engineering units

If you use a nonlinear sensor such as a temperature sensor, you may need to use the oscilloscope's math function to linearize the sensor's output. You can display all SAM40 channels, plus the HDO's analog and digital channels on the oscilloscope's display, although doing so will make each one rather small.

Some sensors require excitation. If you use an Integrated Electronics Piezoelectric (IEPE) or integrated circuit piezoelectric (ICP)-compatible sensor (typically used for vibration, acceleration, displacement, and velocity measurements), you can use the SAM40 to provide power to the sensor.

Teledyne LeCroy SAM40

The SAM40 units connect to the oscilloscope through a USB connection for control and two BNC cables for signals. When connected to an HDO4096 oscilloscope with MAUI 8.5 or higher user interface firmware, the oscilloscope automatically detect and support the SAM40. The SAM40 also has software loaded into its embedded CPU, which you can update by loading into the HDO, after which the HDO can push the software update back to the SAM40.

Prices: SAM40-8 $8990; SAM40-16 $12,990; SAM40-24 $16,990.

Teledyne LeCroy, SAM40 Product Page.

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