LTC2946CDE#PBF

LTC2946 is a rail-to-rail system monitor that measures current, voltage, power, charge and energy. A 12-bit ADC measures load current, input voltage and an auxiliary external voltage. Load current and internally calculated power are integrated over an external clock or crystal or internal oscillator time base for charge and energy. An accurate time base allows this to provide measurement accuracy of better than ±0.6% for charge and ±1% for power and energy. Minimum and maximum values are stored and an over range alert with programmable thresholds minimizes the need for software polling. Data is reported via a standard I2C interface. This I2C interface includes separate data input and output pins for use with standard or opto-isolated I2C connections. Typical applications are telecom infrastructure, industrial equipment, general purpose energy measurement.

• Input supply voltage is 4 to 100V, TA = 25°C, VDD is from 4V to 100V
• INTVCC input supply voltage is 2.7 to 5.8V, TA = 25°C, VDD is from 4V to 100V
• Shunt regulator for supplies <gt/>100V, split SDA pin eases opto-isolation
• Δ∑ ADC with less than ±0.4% total unadjusted error
• 12-bit resolution for current and voltages, ±1% accurate power and energy measurements
• ±0.6% accurate current and charge measurements, additional ADC input monitors an external voltage
• Internal ±5% or external time bases, continuous scan and snapshot modes
• Stores minimum and maximum values, alerts when limits exceeded
• 16-lead (4mm × 3mm) plastic DFN package
• Temperature range from 0°C to 70°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party