The DS1831AS is a sensitive analog device, and proper layout and placement are crucial for optimal performance. It is recommended to place the device close to the battery, use a dedicated analog ground plane, and keep digital signals away from the device. Additionally, use short, direct traces for the battery and temperature sensor connections.
The DS1831AS has an internal temperature sensor that requires calibration for accurate measurement. Calibration involves writing a correction value to the device's internal registers. The correction value can be calculated using the device's temperature measurement data and a reference temperature source. Maxim provides a calibration procedure in the device's application note.
The maximum allowed voltage on the BAT pin is 5.5V. Exceeding this voltage can damage the device. It is recommended to use a voltage regulator or a voltage limiter to ensure the voltage on the BAT pin does not exceed 5.5V.
The DS1831AS has a power-on reset (POR) and brown-out reset (BOR) feature that resets the device when the supply voltage falls below a certain threshold. To handle POR and BOR, ensure that the device's supply voltage is stable and within the recommended operating range. Also, use a capacitor on the VCC pin to filter out noise and voltage droops.
The DS1831AS is rated for operation up to 125°C. However, the device's accuracy and reliability may be affected at high temperatures. It is recommended to use the device within its recommended operating temperature range (–40°C to 85°C) for optimal performance and reliability.
DS1831AS datasheet
by Maxim Integrated Products
