The recommended PCB layout for the LTC1536CMS8 involves keeping the analog and digital grounds separate, using a solid ground plane, and minimizing the length of the traces between the IC and the capacitors. A 4-layer board with a dedicated ground plane is recommended.
To ensure accurate temperature measurement, it's essential to calibrate the device, use a high-accuracy voltage reference, and minimize thermal gradients on the PCB. Additionally, the thermistor should be placed close to the device being measured, and the thermistor leads should be twisted and shielded to minimize noise.
The maximum cable length for the thermistor connection depends on the specific application and the noise environment. However, as a general rule, it's recommended to keep the cable length as short as possible (less than 10 inches) to minimize noise pickup and ensure accurate temperature measurement.
The LTC1536CMS8 is optimized for use with 10kΩ NTC thermistors, but it can be used with other types of thermistors with some modifications. However, the accuracy and linearity of the temperature measurement may be affected, and additional calibration may be required.
The POR and BOD features of the LTC1536CMS8 can be handled by using an external reset circuit, such as a voltage supervisor, to ensure that the device is properly reset during power-up and power-down sequences. Additionally, the BOD threshold can be adjusted using external resistors.
LTC1536CMS8#PBF datasheet
by Linear Technology
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