12-bit SAR, 8-channel MUX-ADC with I²C
The ADS7128IRTET is a 12-bit successive-approximation register (SAR) ADC with an 8-channel input multiplexer feeding a single conversion core — the MUX-ADC configuration means the ADC samples one channel at a time, not simultaneously. Data is read over an I²C interface; the internal oscillator drives the conversion clock, so no external clock source is needed, but the sampling rate is set by the on-chip RC and cannot be adjusted externally. The analog supply range is 2.35 V to 5.5 V, while the digital supply runs from 1.65 V to 5.5 V — this split-rail design lets the ADC talk directly to a 1.8 V or 3.3 V host controller without a level translator.
Package and temperature grade for the bench
Housed in a 16-lead WFQFN with exposed pad (3x3 mm body), the device operates from -40°C to 85°C — the industrial temperature band covers most factory-floor and instrumentation environments, but not extended automotive or downhole applications. The exposed pad must be soldered to a PCB thermal land; the datasheet layout guidance separates the analog and digital ground planes under the IC to keep digital switching noise out of the analog input path.
Active production, quoted to order
Supplied in Tape & Reel (TR) or Cut Tape (CT) options; the 16-WQFN package is standard for high-volume pick-and-place assembly.