Linear Technology Corporation (Milpitas, CA) introduces the LTC2946, a high or low side charge, power and energy monitor for DC supply rails in the 0V to 100V range. An integrated ±0.4% accurate, 12-bit ADC and external precision time base (crystal or clock) enables measurement accuracy better than ±0.6% for current and charge, and ±1% for power and energy. A ±5% accurate internal time base substitutes in the absence of an external one. All digital readings, including minimums and maximums of voltage, current and power, are stored in registers accessible by an I²C/SMBus interface. Features include:
• The ability to be powered from 2.7V to 5V directly, from 4V to 100V through an internal linear regulator, or beyond 100V through an internal shunt regulator.
• Internal ADC that operates in either a continuous scan mode or a snapshot mode.
• Shutdown mode that drops the device current consumption from 900µA to 15µA.
For more information on the LTC2946, visit www.linear.com.