HLW8112

The HLW8112 is an energy metering IC. Equivalent products include:
- ADE7753 (Analog Devices)
- CS5460A (Cirrus Logic)
- MCP3909 (Microchip)
- RN8209 (Richtek)
These chips offer similar power measurement features, though specifications may vary slightly. For exact replacements, check datasheets for compatibility.

The HLW8112 is a high-precision energy metering IC with the following key features:
- Current & Voltage Sensing: Measures AC/DC current (via shunt resistor) and voltage (via divider network).
- High Accuracy: ±0.5% error over dynamic range (1000:1).
- Power Calculations: Active, reactive, and apparent power, plus energy accumulation.
- Wide Voltage Range: Supports 2.7V–5.5V supply and 0–1V analog input range.
- Low Power: Ultra-low standby current (~10µA).
- Digital Interface: SPI/UART for data communication.
- Built-in PGA: Programmable gain amplifier (up to 24x) for flexible current sensing.
- On-Chip Calibration: Offset, gain, and phase adjustment.
- Applications: Smart plugs, energy monitors, IoT devices.
Compact, cost-effective, and suitable for single-phase systems.

The HLW8112 is a high-precision energy metering IC with 20 pins (SSOP-20 package). Key functions include:
- Current & Voltage Sensing: Measures AC/DC current (via shunt resistor) and voltage (via divider network).
- Power Calculation: Computes active, reactive, and apparent power.
- Energy Pulse Output: Generates pulses proportional to energy consumption (CF pin).
- Communication: Supports UART (TXD/RXD pins) for data readout and configuration.
- Power Supply: Operates at 3.3V or 5V (VDD pin).
Pins include V1P/V1N (voltage input), V2P/V2N (current input), CF (energy pulse), and GND for grounding. It’s widely used in smart plugs, energy monitors, and IoT devices.

The HLW8112 is a high-precision energy metering IC, widely used in:
1. Smart Meters – Electricity, water, and gas metering.
2. Home Automation – Energy monitoring in smart plugs and appliances.
3. Industrial Equipment – Power consumption analysis in motors and machinery.
4. Renewable Energy Systems – Solar inverters and battery management.
5. EV Charging – Monitoring AC charging stations.
It supports bidirectional current detection, low power consumption, and UART/SPI interfaces, making it ideal for IoT and embedded energy measurement applications.

The HLW8112 is typically available in a SOP-8 (Small Outline Package) or SOP-16 package, depending on the variant. These surface-mount packages are compact and suitable for energy metering applications. The SOP-8 version is more common for basic configurations, while the SOP-16 may offer additional features or pins. Check the datasheet for exact specifications.