DS2438Z

DS2438Z is Maxim/Dallas’ smart battery monitor IC that talks over a 1‑Wire bus. It is designed for single‑cell packs and provides voltage, current, and temperature sensing, plus coulomb counting to track charge/discharge. Key points:
- Interfaces via 1‑Wire; can operate in parasite-power mode (no dedicated Vdd in some setups).
- Measures pack voltage and current (through an external sense resistor) and on‑chip temperature.
- Includes registers/scratchpad for reading data and storing configuration.
- Used with a 1‑Wire master (microcontroller/datalogger) to monitor battery health, remaining capacity, and provide protections.
Typical applications include handheld devices, remote sensors, and battery-powered systems where you need lightweight, local monitoring of state of charge and temperature without a complex ADC.

- 1-Wire interface (Dallas/Maxim 1-Wire protocol) for easy daisy-chaining
- Battery monitor: measures pack voltage and temperature
- Current sensing: monitors charging/discharging via an external sense resistor
- On-chip ADC with readings for voltage, current, and temperature
- Parasitic-power capable (bus-powered) or externally supplied operation
- Nonvolatile memory and RAM for data storage, calibration, and logging
- Alarm/flag outputs with configurable thresholds for proactive monitoring
- Low-power operation suitable for battery-powered packs
- Wide operating temperature range and rugged 8-pin package variants (DS2438Z family)
- Simple integration in smart-battery / energy-management applications

- Pin count: 8 pins (8-pin package such as SOIC/DIP).
- Function: 1-Wire smart battery monitor. It includes an A/D converter and temperature sensor to monitor battery voltage, current (via an external sense resistor), and temperature, communicating data over the 1-Wire bus.

- Manufacturer: Maxim Integrated (originally Dallas Semiconductor; the lines are now under Analog Devices).
- Company type: A semiconductor company that designs and manufactures analog and mixed-signal integrated circuits (ICs).

DS2438Z is a 1‑Wire smart battery monitor. It continuously measures pack voltage, temperature and current (with coulomb counting) and can flag fault/low‑charge conditions. Applications include:
- Smart battery packs for portable devices, cordless tools, wearables
- UPS and telecom systems
- Data loggers and remote sensors
- Automotive battery management and diagnostics
- Any low‑cost, single‑wire monitored battery installations requiring voltage/temperature data and health status.

DS2438Z comes in an 8-pin surface-mount package: SOIC (SOP-8).