The datasheet provides general guidelines, but a good rule of thumb is to keep the input and output traces short and away from noise sources, and to use a solid ground plane to reduce EMI. Place the device close to the battery and use a local decoupling capacitor to reduce noise.
Use a high-accuracy voltage reference, such as the LTC6655, and ensure that the voltage sense lines are properly filtered and shielded to reduce noise. Also, consider using a Kelvin connection to the battery to reduce measurement errors.
The maximum cable length depends on the specific application, but a general rule of thumb is to keep the sense lines as short as possible (less than 10 inches) to minimize noise and voltage drop. If longer cables are necessary, use twisted pair or shielded cables and consider adding filters or buffers to reduce noise.
The LTC1694-1IS5 has a built-in voltage regulator to handle battery voltage fluctuations. However, if the fluctuations are severe, consider adding additional filtering or regulation stages to ensure accurate voltage monitoring. Also, ensure that the device is properly bypassed with capacitors to reduce noise.
The power consumption of the LTC1694-1IS5 is typically around 1mA, but this can vary depending on the specific application and operating conditions. Be sure to check the datasheet for detailed power consumption specifications and consider using power-saving modes if possible.
LTC1694-1IS5 datasheet
by Linear Technology
