LTC2157 - IC 2-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC64, 9 X 9 MM, LEAD FREE, PLASTIC, MO-220WNJR-5, QFN-64, Analog to Digital Converter
A good PCB layout for the LTC2157 involves keeping the analog and digital grounds separate, using a solid ground plane, and minimizing the length of the input traces. A 4-layer PCB with a dedicated analog ground plane is recommended.
The LTC2157 requires a clean and stable power supply. Use a high-quality decoupling capacitor (e.g., 0.1uF ceramic) close to the VCC pin, and consider adding a 10uF or larger capacitor in parallel to filter out noise.
The LTC2157 can operate with clock frequencies up to 100MHz. However, the maximum clock frequency may be limited by the specific application and the quality of the clock signal.
The LTC2157's analog input range can be optimized by selecting the appropriate gain setting and input range configuration. Consult the datasheet and application notes for guidance on selecting the optimal configuration for your specific application.
The LTC2157's digital output should be driven using a low-impedance driver, such as a CMOS buffer, to ensure reliable data transmission. Avoid using resistive loads or long cables, which can degrade the signal integrity.
LTC2157IUP-12#PBF datasheet
by Linear Technology
