Features and Benefits
- One (ADE7903) 24-bit, Σ-Δ ADC (simultaneously sampling with three ADE7912/ADE7913 ADCs)
- On-chip temperature sensor
- 4-wire SPI serial interface
- Standalone 24-bit, Σ-Δ ADC
- Up to four ADE7903 and ADE7912/ADE7913 devices clocked from a single crystal or an external clock
- Synchronization of multiple ADE7903 and ADE7912/ADE7913 devices
- ±31.25 mV peak input range for current channel
- ±500 mV peak input range for voltage channels
- Single 3.3 V supply
- 20-lead, wide body SOIC package
- Operating temperature: −40°C to +85°C
The ADE7903 is a nonisolated, 3-channel, Σ-Δ analog-to-digital converter (ADC) for the neutral line of polyphase energy metering applications using shunt current sensors. The ADE7903 can also be used for single-phase energy metering and other standalone ADC applications. The ADE7903 features three 24-bit ADCs. The current ADC provides a 67 dBFS signal-to-noise ratio (SNR) over a 3.3 kHz signal bandwidth, whereas the voltage ADCs provide an SNR of 72 dBFS over the same bandwidth. One channel is dedicated to measuring the voltage across a shunt when the shunt is used for current sensing. Up to two additional channels are dedicated to measuring voltages, which are usually sensed using resistor dividers. One voltage channel can be used to measure the temperature of the die via an internal sensor. The ADE7903 includes three channels: one current channel and two voltage channels.
Together with the ADE7912 / ADE7913, the ADE7903 provides a small form factor, 3-phase isolated solution with a neutral measurement. The three phases are isolated with ADE7912 / ADE7913 devices, while the neutral line is not isolated with the ADE7903.
The ADE7903 configuration and status registers are accessed via a bidirectional SPI serial port for easy interfacing with microcontrollers.
The ADE7903 can be clocked from a crystal or an external clock signal. To minimize the system bill of materials, the master ADE7912 / ADE7913 can drive the clocks of up to three additional ADE7912 / ADE7913 or ADE7903 devices. Multiple ADE7912 / ADE7913 and ADE7903 devices can be synchronized to sample at the same moment and provide coherent outputs. The ADE7903 can also be used individually as a standalone ADC.
The ADE7903 is available in a 20-lead, Pb-free, wide body SOIC package.
- 3-phase shunt-based polyphase meters with neutral channel measurement
- Single-phase meters
- Power quality monitoring
- Solar inverters
- Process monitoring
- Standalone ADCs
- Protective devices
- Isolated sensor interfaces
- Industrial programmable logic controllers (PLCs)
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
The EVAL-ADE7903EBZ evaluation kit includes the evaluation board, which along with the EVAL-SDP-CB1Z SDP-B board, allows users to evaluate the performance of the ADE7903 Σ-Δ ADC in a context very close to an actual single-phase meter implementation. There is an isolated version of the ADE7903 Σ-Δ ADC available, the ADE7913; to evaluate the isolated Σ-Δ ADC, use the ADE7913 evaluation kit (order separately from Analog Devices, Inc.). Evaluation software written in LabVIEW® provides access to the registers of the ADE7903 using a PC interface.
Full specifications on the ADE7903 are available in the product data sheet, which should be consulted in conjunction with this user guide when using this evaluation board.
Documentation & Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|ADE7903ARWZ||Material Declaration||Reliability Data||20-Lead SOIC (Wide)|
|ADE7903ARWZ-RL||Material Declaration||Reliability Data||20-Lead SOIC (Wide)|
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Sample & Buy
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.