The ADC14X250 device is a monolithic single-channel high performance analog-to-digital
converter capable of converting analog input signals into 14-bit digital words with a sampling rate
of 250 MSPS. This converter uses a differential pipelined architecture with integrated input buffer
to provide excellent dynamic performance and low power consumption across an extended temperature
range from –40°C to 105°C as measured at the device’s PCB footprint thermal pad. The integrated input buffer eliminates charge kickback noise coming from the internal
switched capacitor sampling circuits and eases the system-level design of the driving amplifier,
anti-aliasing filter, and impedance matching. The buffer can be also be adjusted to correct for
phase and amplitude imbalance of the differential input signal path to improve even order harmonic
distortion. An input sampling clock divider provides integer divide ratios to simplify system
clocking. An integrated low-noise voltage reference eases board level design without requiring
external decoupling capacitors. The output digital data is provided through a JESD204B subclass 1
single lane interface from a 32-pin, 5-mm × 5-mm WQFN package. The ADC14X250 operates on 1.2 V, 1.8
V and 3.0 V power supplies. A SPI is available to configure the device that is compatible with
1.2-V to 3-V logic.
