Pmod ISNS20: 20A Current Sensor

Description

Pmod is Digilent’s name for the line of over 60 peripheral modules that they offer to add extra functionality to both microcontrollers and FPGAs (field-programmable gate array). This functionality includes audio amplifiers, GPS receivers, USB to UART interface, seven-segment displays, accelerometers, H-bridges with input feedback, analog-to-digital converters, and much more.

There are two main categories of Pmod interface that are available: the original peripheral modules with 6 pins (or a stack of two 6-pin sets for 12 pins) and an interface that uses the I²C interface. All of the Pmod headers are designed very consistently with the standard 100 mil (0.1 inches) pitch between each of the pins.

All of the peripheral modules are powered by the host board through the power pin on the interface. The host will be able to power the Pmods at either 3.3V or at 5V power, depending on the requirements of the Pmod.

The Digilent PmodISNS20 is a small current sense module with a digital SPI interface. The board combines an Allegro ACS722 Hall Effect current sensor with a 12-bit analog-to-digital converter from Texas Instruments. The PmodISNS20 is quick, accurate, and easy to use for a variety of applications.

Features

• High accuracy current sensor
• Measure current with 120Hz/20kHz/80kHz jumper selections
• ±20A DC or AC input
• Accurate to within ±2%
• 12-bit ADC
• Small PCB size for flexible designs 1.3 in × 0.8 in (3.3 cm × 2.0 cm)
• 6-pin Pmod connector with SPI interface
• Follows Digilent Pmod Interface Specification Type 2

Applications

• Current measurement
• Power metering
• Closed loop current control
• Over-current protection

Package content:

• Pmod ISNS20
• Custom antistatic Pmod packaging