ADS131M08IRSNR - 24-Bit 32kSPS 8-Ch Delta-Sigma ADC | TI
MPN: ADS131M08IRSNR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.67 | $6.67 |
| 10 | $6 | $60.00 |
| 100 | $5.34 | $534.00 |
| 500 | $4.81 | $2,405.00 |
| 1,000 | $4.33 | $4,330.00 |
Drop-in alternatives for ADS131M08IRSNR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ADS131M06IRSNT
β Drop-Inπ Reference alternative (not in catalog)
ADS131M04IRSNT
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ADS131M02IRSNT
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ADS131M08QPBSRQ1
β Drop-Inβ In Stock
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View Datasheet βADS131M08IRSNR Maximum Ratings & Electrical Characteristics
| Resolution | 24 bit |
| Number of Channels | 8 (simultaneous sampling) |
| Converter Type | Delta-Sigma (ΞΞ£) |
| Sampling Rate | up to 32 kSPS per channel |
| Number of Inputs | 8 |
| Interface | SPI (serial) |
| Package | 32-QFN (4x4 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +125C (I grade) |
| Typical Applications | Energy metering, power metrology, circuit breakers |
| Input Interfacing | Direct resistor-divider or transformer interface |
| Dynamic Range | Wide dynamic range (energy-measurement optimized) |
| Power Consumption | Low power (per datasheet) |
| RoHS Status | Compliant (standard TI offering) |
ADS131M08IRSNR 32-qfn (4x4 mm) Pin Configuration Guide
Complete pinout information for ADS131M08IRSNR (32-qfn (4x4 mm) package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for ADS131M08IRSNR.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADS131M08IRSNR is suitable for 6 applications: Polyphase Smart Energy Meters, Solar String Inverters, Circuit Breakers and Protection Relays, Power Quality Analyzers, Motor Control and Drive Metrology, Bidirectional DC-DC Converter Control.
Polyphase Smart Energy Meters
The ADS131M08's eight simultaneously-sampling 24-bit channels are purpose-built for polyphase metering: three phase voltages, three phase currents, neutral current, and one spare channel all digitize with zero inter-channel skew, which is mandatory for accurate active/reactive power calculation across phases. The wide dynamic range supports direct connection to resistor-divider voltage sensing and CT or shunt current sensing without external gain stages. Its energy-measurement-specific features, such as phase calibration, help designers meet metering accuracy class requirements, while the low-power operation suits communication-enabled smart meter endpoints.
Recommended
Solar String Inverters
In grid-tied solar string inverters, the ADS131M08 digitizes DC string voltages/currents plus AC grid side voltage and current channels simultaneously, enabling accurate power, energy, and power-factor computation for grid compliance and MPPT control. The 32-kSPS per-channel rate provides ample bandwidth for 50/60 Hz metrology with margin for harmonics analysis, and the 24-bit resolution resolves low-current night-time consumption for anti-islanding and standby-power monitoring. Simultaneous sampling preserves phase alignment between grid voltage and inverter output current - critical for accurate feed-in billing and reactive power control.
Recommended
Circuit Breakers and Protection Relays
The ADS131M08 fits circuit breaker and protection applications because it continuously samples multiple current channels with wide dynamic range, capturing both normal load currents and short-circuit fault transients without range switching. The simultaneous sampling of all eight channels means phase comparison and residual (sum-of-currents) earth-fault detection remain phase-accurate. Its energy-measurement heritage provides precise RMS computation from the digitized streams, letting protection algorithms trip on accurate thresholds, while SPI CRC error checking ensures data integrity in the electrically noisy switchgear environment.
Recommended
Power Quality Analyzers
Power quality analyzers must measure voltage sags, swells, harmonics, and unbalance across all three phases at once. The ADS131M08's eight simultaneous 24-bit channels capture all phase voltages and currents coherently, and its 32-kSPS maximum data rate resolves harmonic content well beyond the 50th harmonic order per IEC-type measurement practice. The wide dynamic range accommodates both high load currents and small leakage/standby currents in a single range, and per-channel delta-sigma modulators eliminate multiplexer settling artifacts that plague scanned-input ADCs in power quality instruments.
Recommended
Motor Control and Drive Metrology
In motor drives, the ADS131M08 provides simultaneous digitization of three phase currents plus DC bus voltage and current, giving the control loop phase-accurate feedback for field-oriented control and precise power metering of the drive. The 32-kSPS rate comfortably exceeds typical PWM control-loop update rates, and the delta-sigma architecture provides inherent anti-aliasing that suppresses switching-frequency noise from the inverter stage. Its low latency filter modes support fast overcurrent detection, while the 24-bit resolution enables high-accuracy torque ripple and efficiency analysis in lab and production test systems.
Recommended
Bidirectional DC-DC Converter Control
TI's reference design for precisely controlling the current and voltage of a bidirectional interleaved buck-converter power stage pairs a C2000 MCU with the ADS131M08 precision ADC. The ADC's simultaneous multi-channel sampling captures inductor currents and bus voltages without skew, enabling accurate current sharing between interleaved phases and fast transient response in battery charge/discharge and energy-storage converters. The 24-bit resolution supports coulomb-counting-level current accuracy, while the SPI interface with CRC gives the digital controller clean, trustworthy feedback data in high dV/dt power conversion environments.
Recommended
Recommended Products Summary
Engineering reference data for ADS131M08IRSNR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS131M06IRSNT | ADS131M04IRSNT | ADS131M02IRSNT | ADS131M08QPBSRQ1 |
|---|---|---|---|---|---|
| Package | QFN-32 (4x4 mm) | QFN-32 (4x4 mm) - same | QFN-32 (4x4 mm) - same | QFN-32 (4x4 mm) - same | VQFN-64 - different footprint (Q1 variant) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit | 24 bit |
| Channel Count | 8 (simultaneous) | 6 | 4 | 2 | 8 |
| Max Sampling Rate | 32 kSPS | 32 kSPS | 32 kSPS | 32 kSPS | 32 kSPS |
| Sampling Architecture | Simultaneous sampling | Simultaneous sampling | Simultaneous sampling | Simultaneous sampling | Simultaneous sampling |
| Interface | SPI (serial) | SPI (serial) | SPI (serial) | SPI (serial) | SPI (serial) |
| Temperature Grade | -40C to +125C (I) | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | AEC-Q100 automotive qualified |
Key Differentiators
- Full 8-channel simultaneous sampling in a compact 4x4 mm footprint (vs ADS131M06IRSNT)
- Energy-measurement-specific feature set (vs AD7768)
- Cost optimization path within the same footprint (vs ADS131M04IRSNT)
Design Notes
Keep the analog front-end routing for the eight input channels symmetric and away from the SPI clock lines to prevent digital coupling into the delta-sigma inputs. Place a solid ground plane under the QFN-32 (4x4 mm) and use a low-ESR 100 nF decoupling capacitor at each supply pin plus bulk capacitance near the device. Route voltage-channel resistor dividers with short, matched traces so per-channel parasitics remain consistent across phases - mismatch here directly appears as phase error in metering calculations.
Because each of the eight channels has its own modulator, simultaneous sampling is inherent - but the accuracy of phase relationships depends on a clean master clock. Use a crystal or low-jitter oscillator for the ADC clock rather than an MCU-generated GPIO clock, and follow the TI datasheet SPI timing requirements (setup/hold) to avoid read errors at high SCLK rates. Enable the optional CRC data-word check when operating in electrically noisy switchgear or inverter environments.
Do not assume the ADS131M08QPBSRQ1 automotive variant is pin-compatible on your board - it comes in a larger VQFN-64 package, so switching grades mid-design requires PCB rework. Also, performance metrics such as SNR and ENOB are characterized differently between vendors; per the TI E2E forum discussion on ADS131M08 vs Microchip MCP3914A1, a direct datasheet-to-datasheet comparison of SINAD/SFDR between manufacturers is not valid. Always compare against TI's own characterization conditions stated in the ADS131M08 datasheet.
Compliance Information
RoHS status per standard TI offering (IRSNR suffix, Tape & Reel). Not AEC-Q100 qualified - use ADS131M08QPBSRQ1 for automotive. Detailed REACH/halogen status: verify on TI.com product page.
