Questions on ADE9430 Multi-Chip Setup, Synchronization, and Voltage Channel Handling

Hello,

I’m designing a modular power metering system using eight ADE9430 ICs to support a total of 24 current channels. These will be deployed across a mix of configurations, including single-phase, two-phase three-wire, and three-phase four-wire systems.

To optimize channel usage, I initially planned to leave the IN channel unused, since it does not provide full metrology features. However, I’m reconsidering its role. In particular, I’d like to understand:

0. Neutral Current in 3-Phase 4-Wire and ADC_REDIRECT Usage

If the IN input is unused on one IC, can that IC still fully support three-phase four-wire metrology, or is the IN path required to enable full parameter calculations?

Furthermore, if a current channel (e.g., neutral or a line current in a split configuration) must be routed through another IC, is it necessary to use the ADC_REDIRECT register to map its ADC to a metrology datapath? Or would such configurations be better handled entirely in the external MCU?

1. Synchronization Between ADE9430 ICs

Since the ADE9430 doesn’t include SYNC_IN or SYNC_OUT pins, what’s the recommended method to start sampling simultaneously across multiple devices?

I’m currently using a shared external clock (CLKIN) and plan to apply a common hardware RESET to all ICs. Would this ensure tight enough sampling alignment for synchronized measurement, or are there any additional steps recommended?

2. Timing Overhead of ADC_REDIRECT

In cases where I need to reuse a single datapath (e.g., for measuring three single-phase circuits sequentially on one IC), I plan to switch ADC inputs using the ADC_REDIRECT register.

What is the latency or required stabilization time after switching before reliable measurements can be read? Does the datapath need flushing, or is the transition seamless?

This would help in determining how to schedule readings efficiently when reusing a single datapath for multiple redirected channels.

3. Voltage Reference Flexibility in 3-Single-Phase Mode

Assume IA, IB, and IC represent three independent single-phase loads, and I intend to use VA as the sole voltage reference for all three. However, VB and VC are physically connected to their corresponding voltages on the PCB.

Is there a way to instruct the ADE9430 to compute all energy, power, and angle parameters only with respect to VA, ignoring VB and VC despite being wired in?

I’d like to avoid modifying the hardware or disconnecting the unused voltages, but still ensure all metrology calculations are aligned with VA only.

4. Issues with ADSW-PQ-CLS Library

I received the ADSW-PQ-CLS library from Analog Devices, but the package appears incomplete. For example:

• The psdc folder was missing.

• There was no user documentation or integration guide.

• The library could not be built in Keil, and its structure did not seem compatible with a standard CMSIS-based workflow.

Could you kindly provide a complete version of the ADSW-PQ-CLS library, along with an example project for integration with Cortex-M MCUs, preferably using Keil or STM32CubeIDE?

Any guidance on the above — especially synchronization, redirection behavior, and flexible voltage/current channel pairing — would be greatly appreciated.

Warm regards,
Maryam