Description:The Intersil ICL7135 precision A/D converter, with its multiplexed BCD output and digit drivers, combines dual-slope conversion reliability with ±1 in 20, 000 count accuracy and is ideally suited for the visual display DVM/DPM market. The 2. 0000V full scale capability, auto-zero, and auto-polarity are combined with true ratiometric operation, almost ideal differential linearity and true differential input. All necessary active devices are contained on a single CMOS lC, with the exception of display drivers
A good PCB layout for the ICL7135CPIZ involves keeping the analog and digital grounds separate, using a star-ground configuration, and placing the device close to the power supply to minimize noise and radiation.
To ensure accurate voltage measurement, use a high-impedance voltage source, minimize noise and interference, and use a low-noise, low-impedance analog ground. Also, ensure that the input voltage is within the specified range of 0V to 200mV.
The maximum clock frequency that can be used with the ICL7135CPIZ is 100 kHz. Exceeding this frequency may result in inaccurate conversions and reduced performance.
Yes, the ICL7135CPIZ can be used in a multi-channel application by using multiple devices or by time-multiplexing the inputs. However, this may require additional circuitry and careful layout to minimize crosstalk and noise.
The ICL7135CPIZ has internal overvoltage protection up to 30V. However, for voltages above 30V, external protection circuitry such as voltage limiters or zener diodes may be required to prevent damage to the device.
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ICL7135CPIZ Overview
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