AD7280WBSTZ-RL

AD7280WBSTZ-RL is Analog Devices’ multi-cell Li‑ion battery monitor/gauge IC. It is designed for battery management systems (BMS) and can monitor up to multiple series cells, perform coulomb counting, and provide accurate state-of-charge (SOC) and remaining capacity estimates.
Key points:
- Measures cell voltages (up to the configured cell count) and pack current via an external sense resistor, plus temperature.
- Digital interface (I2C/SPI) to a host MCU for reading voltages, SOC, capacity and other diagnostics.
- Features include coulomb counting with calibration, and protections/controls for safe operation (e.g., voltage and current limits; optional cell-balancing control depending on variant).
- The WBSTZ suffix denotes a specific package (WB/LFCSP family) and routing, while RL indicates reel packaging for automated assembly.
Typical uses:
- Battery packs for portable devices, power tools, e-bikes, and energy storage systems needing reliable SOC estimation and health monitoring.
Note: For exact specs (max cell count, voltage range, current sense range, interface details), refer to the ADI datasheet for AD7280WBSTZ-RL.

Here are typical features of the AD7280WBSTZ-RL (datasheet should be consulted for exact specs):
- 3-cell Li‑ion/Li‑polymer battery gauge (fuel gauge) with coulomb counting
- Impedance tracking to improve SOC accuracy over cell aging and temperature
- Monitors pack voltage and individual cell voltages (VC1–VC3), plus pack current
- Temperature sensing via external NTC input
- Serial digital interface (I2C/SMBus-compatible) for host MCU access and control
- Programmable full-scale capacity, SOC/WA (state indicators), and alarm thresholds
- Low-power operation with standby/wake behavior for battery-powered devices
- RoHS-compliant, packaged in WBSTZ form factor with RL (tape & reel) packaging
Note: Exact electrical specs, voltage ranges, timing, and package details vary by revision. Refer to the official datasheet for precise numbers and guarantees.

The AD7280WBSTZ-RL uses the STZ package: a 28‑lead RoHS, lead‑free small‑outline package, supplied on tape & reel (RL).

- Pin count: 28 pins
- Function: Battery gas gauge/fuel gauge IC (coulomb counter) for Li-ion packs; provides voltage/current/temperature sensing and state-of-charge/capacity data via an SPI-compatible interface to a host MCU.

- Manufacturer: Analog Devices, Inc. (Analog Devices)
- What kind of company: A global semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits for industrial, automotive, communications, and consumer applications.

AD7280WBSTZ-RL is a multi-cell Li-ion battery monitor for battery-management systems. Applications include automotive BMUs (EVs/hybrids), energy-storage and telecom backup, industrial power tools and cordless equipment, e-bikes/scooters, medical devices, and portable electronics. It supports multi-cell voltage monitoring, current/coulomb counting, temperature sensing, and pack protection (over/under voltage, overcurrent) decisions.