12-bit SAR ADC with I²C — what the specs mean for your BOM
The MAX1239MEEE-T is a 12-bit successive-approximation-register (SAR) ADC from Analog Devices, sampling at 94.4 kSPS over an I²C serial bus. The SAR architecture delivers a single-cycle conversion with no pipeline delay — every sample is a fresh measurement at the moment the convert command is issued, important for multiplexed sensor scanning where channel-to-channel latency must be deterministic. The input mux accepts either differential or single-ended signals (configurable via the I²C register map), and the ratio of sample-and-hold to ADC is 1:1, meaning each conversion starts from a held snapshot of the selected input. This matters when the input signal changes faster than the conversion time — the hold capacitor freezes the voltage at the start of the SAR cycle.
Lifecycle, compliance, and sourcing
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