SY7T501FAC (SY7T501FAC)

• High Resolution Delta-Sigma ADC with Two Analog (sensor) Inputs 
• Internal Precision Voltage Reference
• Internal Trimmed Timing Reference 
• Fixed Function Digital Signal Processing Block 
• UART Interface with Auto-Baud Function
• Integrated Control for Latching and Non- Latching Single Coil Relays
• Integrated Dimmer Control (Leading/Trailing Edge)
• Integrated AC Line Voltage Zero-Crossing Detector
• Digital I/O’s Individually Configurable as Open Drain or Push-Pull, 5V Tolerant. 
• Small SOP8 Package

The SY7T501 is an energy measurement IC monitoring any single-phase (2-wire) loads. The SY7T501 is ideally suited for applications such as smart-plugs, smart appliances, lighting and building automation.

The SY7T501 UART interface supports low baud rates to allow low-cost isolation when required. Additionally, the UART includes auto-baud function (detects and adjust baud rate to host’s rate)

The analog front end (AFE) provides a differential analog input for current sensing and a single-end input dedicated to voltage acquisition. A high-resolution delta-sigma converter feeds a fixed function digital signal processing block performing rms, active power and energy accumulation calculations. The analog front-end includes a comparator and relevant state machine providing voltage zero-crossing reference to internal blocks and digital outputs.

The SY7T501 includes a user-programmable trailing and leading-edge dimmer control block and a relay timing control for non-latching and latching (single coil) relay types.