The DS2438 is a smart battery monitor that provides several functions, including tagging a battery pack with a unique serial number, measuring battery voltage and current, calculating battery capacity, and measuring battery temperature.
The DS2438 Smart Battery Monitor is a device designed to provide several functions desirable for battery packs, including a unique 64-bit serial number, a direct-to-digital temperature sensor, an A/D converter for battery voltage and current, and an integrated current accumulator. It communicates via a 1-Wire interface, requiring only one wire and ground from a central microprocessor to the device.
The device features an on-board temperature measurement technique providing a 13-bit, two's complement format with 0.03125°C resolution over a range of -55°C to +125°C. It also includes a 10-bit A/D converter with a range of 0 to 10 volts for measuring battery voltage, suitable for NiCd, NiMH, and lithium ion battery packs.
| Operating Temperature Range | -40°C to +85°C |
|---|---|
| Temperature Measurement Range | -55°C to +125°C |
| Temperature Resolution | 0.03125°C |
| Voltage Measurement Range | 0 volt to 10 volt |
| Voltage Resolution | 10 mV |
| ADC Resolution | 10 bits |
| User Memory Size | 40 bytes |
| Interface | 1-Wire |
| Serial Number | 64-bit |
The operating range is from -40°C to +85°C.
The temperature sensor provides a resolution of 0.03125°C.
The ADC range is 0 volt to 10 volt.
There is 40 bytes of nonvolatile user memory available.