Overview
The LTC2947IUFE#PBF, produced by Analog Devices Inc., is a high-precision power and energy monitor designed to support a wide range of applications. This device features an internal sense resistor that can handle current measurements up to ±30A. It utilizes three internal No Latency ΔΣ™ ADCs to ensure accurate measurements of voltage and current. The high-bandwidth analog multiplication of voltage and current enables precise power measurement. The device also supports internal or external clocking options for accurate charge and energy measurements.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Current Range | -30 | - | 30 | A |
| Supply Voltage | 4.5 | - | 15 | V |
| Operating Temperature | -40 | - | 85 | °C |
| Current Offset | - | 9 | - | mA |
| Sense Resistor | - | 300 | - | µΩ |
| Voltage Measurement Accuracy | - | ±0.5% | - | % of reading |
| Power Measurement Accuracy | - | ±1.2% | - | % of reading |
| Package/Case | - | 32-Lead QFN | - | - |
| Interface | - | I²C/SPI | - | - |
Key Features
- Measures current, voltage, power, charge, and energy.
- ±30A current range with low 9mA offset.
- Integrated 300µΩ sense resistor, temperature-compensated.
- Input voltage range: 0V to 15V, independent of supply voltage.
- Instantaneous multiplication of voltage and current for accurate power measurement.
- Internal or external clocking options for precise charge and energy measurements.
- Programmable high and low thresholds for all measured quantities to reduce digital traffic with the host.
- Shutdown mode with 10μA current consumption.
Applications
- Servers
- Telecom infrastructure
- Industrial applications
- Electric vehicles
- Photovoltaics
Q & A
- What is the current measurement range of the LTC2947IUFE#PBF?
The LTC2947IUFE#PBF can measure current up to ±30A.
- What is the accuracy of voltage measurement in the LTC2947IUFE#PBF?
The voltage measurement accuracy is ±0.5% of the reading.
- What is the power measurement accuracy of the LTC2947IUFE#PBF?
The power measurement accuracy is ±1.2% of the reading.
- What is the operating temperature range of the LTC2947IUFE#PBF?
The operating temperature range is -40°C to 85°C.
- What interface options are available for the LTC2947IUFE#PBF?
The device supports both I²C and SPI interfaces.
- What is the purpose of the internal sense resistor in the LTC2947IUFE#PBF?
The internal 300µΩ sense resistor is temperature-compensated and minimizes efficiency loss and external components, simplifying energy measurement applications.
- Can the LTC2947IUFE#PBF be used in high-current applications?
Yes, it is designed to handle high-current applications up to ±30A.
- What are some typical applications of the LTC2947IUFE#PBF?
Typical applications include servers, telecom infrastructure, industrial applications, electric vehicles, and photovoltaics.
- How does the LTC2947IUFE#PBF ensure accurate power measurement?
The device ensures accurate power measurement through high-bandwidth analog multiplication of voltage and current.
- What is the shutdown current consumption of the LTC2947IUFE#PBF?
The shutdown current consumption is 10μA.
