Eight-channel simultaneous-sampling ADC for polyphase metering and industrial analog front-ends
The Texas Instruments ADS131M08IRSNR is an 8-channel, 24-bit sigma-delta ADC with eight dedicated converters — one per differential input — so all channels sample simultaneously at 32 kSPS each. No input multiplexer, no inter-channel phase delay. That makes this part a direct fit for polyphase energy metering, protective relay current/voltage sensing, and multi-axis vibration monitoring where you need time-coherent data across every channel. Each channel includes a PGA ahead of the modulator. The reference can be internal or external, and the digital interface is SPI. The package is a 32-pin WFQFN with exposed pad (4 mm × 4 mm QFN), surface-mount only. The -40°C to 125°C operating range covers industrial cabinet, engine bay, and outdoor enclosure environments without derating.
24 bits at 32 kSPS — what the sampling rate and resolution mean for your measurement chain
The 24-bit sigma-delta modulator provides 24-bit resolution. The 32 kSPS per channel captures harmonic content in power-quality analysis. Because all eight ADCs run simultaneously, you get true simultaneous sampling — no skew from a round-robin mux. This is essential for calculating per-phase real and reactive power in a three-phase system where voltage and current samples must align in time.
Active lifecycle — no end-of-life risk for current designs
The ADS131M08IRSNR carries an active product status with ROHS3 compliance. For BOM planning, this part is qualified for new production runs and ongoing volume builds.
Package and tape options — what ships on the reel
This order code is available in Tape & Reel (TR) or Cut Tape (CT). The 4 mm × 4 mm QFN body fits a tight PCB layout; the exposed pad requires a thermal via pattern under the package for heat sinking and a solid ground connection.