The ADS1251U requires careful layout and routing to minimize noise and ensure accurate conversions. TI recommends a 4-layer PCB with a solid ground plane, and to keep analog and digital traces separate. Additionally, decoupling capacitors should be placed close to the device.
The ADS1251U has a built-in calibration feature that can be used to optimize gain and offset. The device can be calibrated using an external calibration voltage source, and the calibration data can be stored in the device's internal registers. TI provides a calibration guide and software tools to assist with this process.
The ADS1251U requires a specific power-up sequence to ensure proper operation. The recommended sequence is to power up the analog supply (AVDD) first, followed by the digital supply (DVDD), and then the clock signal. This sequence helps to prevent latch-up and ensures that the device is properly initialized.
The ADS1251U has an internal clock that can be used to synchronize the conversion process. The device can also be synchronized with an external clock signal. TI recommends using a clock signal with a frequency of at least 10 MHz to ensure accurate conversions. Additionally, the device's clock synchronization feature can be used to synchronize multiple devices in a system.
The ADS1251U is a high-performance ADC that can generate heat during operation. TI recommends providing adequate thermal dissipation for the device, such as using a heat sink or thermal pad. The device's thermal characteristics are specified in the datasheet, and TI provides thermal modeling tools to help with thermal design.
ADS1251U datasheet
by Texas Instruments
