The AK925X series is a lineup of ZDS-NS (Zero latency Delta Sigma with Noise Suppression) A/D converter.
The AK925X suppresses high frequency noise in analog input signals by oversampling A/D conversion.
The AK925X series that is a different output format option is available too.
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The AK9255NK, the AK9256NK, the AK9255ANK and the AK9256ANK are pin compatible each other.

The AK924X series is a lineup of ZDS (Zero latency Delta Sigma) and SAR (Successive Approximation Register) analog front ends with A/D converter.

The AK924X has a programmable gain amplifier (PGA) and low pass filter.  Therefore, sensors in various signal ranges can be connected directly.  In addition, it has a transimpedance amplifier enabling to connect with current output sensors.

The AK923X series is a lineup of single function ZDS (Zero latency Delta Sigma) and SAR (Successive Approximation Register) A/D converters.  They are low input capacitance devices that can be easily adopted to your system.  With a product that has 14-bit or more resolution, it is more difficult to derive the A/D converter characteristics.  Therefore, ZDS architecture is adopted for these products for a longer acquisition time.

The AK9232NK, the AK9233NK and the AK9234NK are pin compatible each other.
The AK9235NK is pin compatible with the AK9255NK, the AK9256NK, the AK9255ANK and the AK9256ANK.

The AK922X series is a line-up of single function Delta-sigma modulators.  The AK922X outputs 1-bit Pulse Density Modulation signal by oversampling A/D conversion.

High resolution and linearity can be achieved by demodulating low frequency signals by suppressing high frequency signals with a digital filter at the output stage of the AK922X.