300ksps throughput and single-supply simplicity
The 300k samples-per-second rate is the headline throughput figure. At 10 bits per sample over SPI, the serial clock needs to run fast enough to shift out the conversion result between conversions — the part's own SPI timing supports that rate without dead cycles. The single-ended input configuration means each of the four channels measures a voltage referenced to a common ground; no differential front-end required. The reference can be either the internal bandgap or an external voltage applied to the REF pin, which gives flexibility between absolute accuracy and ratiometric measurement against a system reference.
For a spare-parts storeroom or a production BOM line, this part does not carry the obsolescence urgency that older ADC families do.