MICROCHIP ATM90E26-YU-R

The M90E26 is a high-performance wide-span energy metering chip. The ADC and DSP technology ensure the chip's long - term stability over variations in grid and ambient environmental conditions.

• Metering features fully in compliance with the requirements of IEC62052 - 11, IEC62053 - 21 and IEC62053 - 23; applicable in class 1 or class 2 single - phase watthour meter or class 2 single - phase var - hour meter.
• Accuracy of 0.1% for active energy and 0.2% for reactive energy over a dynamic range of 5000:1.
• Temperature coefficient is 15 ppm/°C (typical) for on - chip reference voltage
• Single - point calibration over a dynamic range of 5000:1 for active energy; no calibration needed for reactive energy.
• Energy Meter Constant doubling at low current to save verification time.
• Electrical parameters measurement: less than ±0.5% fiducial error for Vrms, Irms, mean active/ reactive/ apparent power, frequency, power factor and phase angle.
• Forward/ reverse active/ reactive energy with independent energy registers. Active/ reactive energy can be output by pulse or read through energy registers to adapt to different applications.
• Programmable startup and no - load power threshold.
• Dedicated ADC and different gains for L line and N line current sampling circuits. Current sampled over shunt resistor or current transformer (CT); voltage sampled over resistor divider network or potential transformer (PT).
• Programmable L line and N line metering modes: anti - tampering mode (larger power), L line mode (fixed L line), L + N mode (applicable for single - phase three - wire system) and flexible mode (configure through register).
• Programmable L line and N line power difference threshold in anti - tampering mode.
• 3.3V single power supply. Operating voltage range: 2.8~3.6V. Metering accuracy guaranteed within 3.0V~3.6V. 5V compatible for digital input.
• Built - in hysteresis for power - on reset.
• Selectable UART interface and SPI interface (four - wire SPI interface or simplified three - wire SPI interface with fixed 24 cycles for all registers operation).
• Parameter diagnosis function and programmable interrupt output of the IRQ interrupt signal and the WarnOut signal.
• Programmable voltage sag detection and zero - crossing output.
• Channel input range - Voltage channel (when gain is '1'): 120μVrms~600mVrms. - L line current channel (when gain is '24'): 5μVrms~25mVrms. - N line current channel (when gain is '1'): 120μVrms~600mVrms.
• Programmable L line current gain: 1, 4, 8, 16, 24; Programmable N line gain: 1, 2, 4.
• Support L line and N line offset compensation.
• CF1 and CF2 output active and reactive energy pulses respectively which can be used for calibration or energy accumulation.
• Crystal oscillator frequency: 8.192 MHz.
• Green SSOP28 package.
• Operating temperature: - 40°C~ + 85°C.

• The M90E26 is used for active and reactive energy metering for single - phase two - wire (1P2W), single - phase three - wire (1P3W) or anti - tampering energy meters.
• With the measurement function, the M90E26 can also be used in power instruments which need to measure voltage, current, etc.