The maximum clock frequency that can be used with the LTC1290 is 1.5MHz. However, it's recommended to use a clock frequency of 1MHz or less to ensure reliable operation.
To ensure accurate conversions with the LTC1290, make sure to follow proper layout and grounding techniques, use a low-noise power supply, and minimize digital noise on the analog input pins. Also, ensure that the clock frequency is within the recommended range and that the conversion rate is not too high.
Yes, the LTC1290 can be used with a single-ended analog input. However, the input signal should be referenced to the analog ground (AGND) pin, and the analog input range should be within the specified range of 0V to VREF.
The LTC1290 has internal overvoltage protection on the analog input pins, which can withstand voltages up to ±15V. However, it's still recommended to use external protection circuitry, such as voltage-limiting resistors or diodes, to prevent damage from excessive voltage transients.
The recommended power-up sequence for the LTC1290 is to first apply the analog power supply (VCC), followed by the digital power supply (VDD), and then the clock signal. This ensures that the analog circuitry is powered up before the digital circuitry.
LTC1290DCSW#PBF datasheet
by Linear Technology
