16-channel 10-bit SAR ADC in a 24-QSOP
The MAX11625EEG+ is a 10-bit successive-approximation-register (SAR) ADC from Analog Devices that multiplexes 16 single-ended inputs through a single sample-and-hold stage into one converter core, streaming results over an SPI interface at 300k samples per second.
Channel count and throughput for multi-sensor scanning
Sixteen single-ended inputs with a 1:1 S/H:ADC ratio means the internal sampling capacitor is dedicated to one channel at a time — the mux switches after each conversion completes, so the aggregate throughput across all channels is the full 300k samples per second divided by the number of channels scanned. At 300 kHz the SAR architecture delivers a conversion in roughly 3.3 µs; the SPI clock rate on the data interface must be fast enough to read the result before the next conversion finishes, which is a routine constraint for any microcontroller with a hardware SPI peripheral running above 10 MHz.
Supply rails and reference flexibility
The reference can be driven externally or supplied from the internal bandgap; an external reference improves absolute accuracy and temperature drift, while the internal reference saves a pin and a reference IC for applications that can tolerate its wider tolerance.
Package and board-fit for the 24-QSOP
Housed in a 24-QSOP (0.154-inch body width, 3.90 mm), the surface-mount footprint matches the industry-standard SSOP-24 land pattern — the same PCB layout serves either package variant, which is useful when second-sourcing or migrating between suppliers.