pmMTU

Stage: ready

Overview: pmMTu is a PMOD(TM) interface compatible telemetry module providing microampere current as well as voltage consumption readings for testing IoT device. IoT device supposed to be powered through the pmMTu module bypass connectors. 2 pins are for supply power (XS1), other 2 pins are for the IoT device connection (XS2).

Features:

• pmMTu1V8 tuned for 0­1.8V voltage range, 0­50mA current measurement range if J1 is shortened or 0­500uA current measurement range if J2 is shortened
• pmMTu1V8 has 138mA max current peak survivable limit
• pmMTu3V3 tuned for 0­3.3V voltage range, 0­50mA current measurement range if J1 is shortened or 0­500uA current measurement range if J2 is shortened
• pmMTu3V3 has 75mA max current peak survivable limit
• both versions could withstand up to 6V on supply measurement power pins
• both versions do positive/negative voltage based milliampere measurement with 50/32768 ~ 1.52e­3 mA or 1.52e­6 A step for 0­50mA range (J1 shortened)
• both versions do positive/negative voltage based microampere measurement with 500/32768 ~ 1.52e­8 uA or 1.52e­14 A step for 0­500uA range (J2 shortened)
• pmMTu1V8 operates on constant 3.3V regulated DC supplied over standard PMOD port
• pmMTu3V3 require constant 5V regulated DC supplied over PMOD port and is recommended to be chained with special pm5V0 DC­DC regulator pass­through module
• both versions provide constant incoming supply voltage reading with the help of first ADS1110
• both versions provide constant milli/microampere current consumption reading with the help of second ADS1110
• both ADS chips are different address based i2c interface and chained on the same i2c bus encapsulated inside PMOD interface

Documentation

View schematic in PDF

Assembly chains with this board

Also, see related videos on Youtube

Part number for pmMTu3V3: 302301