NOS8008 Power Monitor

NOS8008 is a current/voltage/power/energy/charge monitor based on the INA228 from Texas Instruments. It contains an ultra-precise 20-bit ADC coupled with a 0.015 (15 milliohm), 0.1% shunt resistor for extremely accurate measurement of as much as +85V at up to 10A (~10µA per LSB) in high-current mode or up to 2.75A (~2.5µA per LSB) in low-current mode on either the high side or low side.

By measuring the voltage drop across the low-burden shunt resistor with its ultra-precise 20-bit analog-to-digital converter the current can be derived and power calculated conveniently made easy by the accompanying software libraries.

WARNING

This interface is not suitable for measuring AC voltage or current.

Features

• High-resolution, 20-bit Delta-Sigma ADC
• Current monitoring accuracy:
  • Offset voltage: ±1 µV (maximum)
  • Offset drift: ±0.01 µV/°C (maximum)
  • Gain error: ±0.05% (maximum)
  • Gain error drift: ±20 ppm/°C (maximum)
• Common Mode Rejection: 154 dB (minimum)
• Power Monitoring Accuracy: 0.5% full scale
• Energy and Charge Accuracy: 1.0% full scale (maximum)
• Fast Alert Response: 75 μs
• Wide Common-Mode Range: -0.3 V to +85 V
• Shunt Full-Scale Differential Range: ±163.84 mV / ±40.96 mV
• Input Bias Current: 2.5 nA (maximum)
• Temperature Sensor: ±1°C (maximum at 25°C)
• Programmable Resistor Temperature Compensation
• Programmable Conversion Time and Averaging
• Operates from a 2.7-V to 5.5-V Supply:
  • Operational Current: 640 µA (typical)
  • Shutdown Current: 5 µA (maximum)