ADS131M08IRSNR - 24-Bit 32kSPS 8-Ch Delta-Sigma ADC | TI
MPN: ADS131M08IRSNR ✓ NakahandaADS131M08IRSNR Ulas
A delta-sigma ADC is a type of analog-to-digital converter that oversamples the input signal and applies digital filtering to achieve very high resolution, making the device family a key element of the broader signal chain hierarchy: delta-sigma ADC -> data converter -> mixed-signal IC -> semiconductor. Because the channels are sampled simultaneously, phase relationships between all inputs are preserved - critical for multi-phase power measurement.
Key features include 24-bit resolution across all eight simultaneous channels, a programmable output data rate up to 32 kSPS, energy-measurement-specific features such as a built-in phase calibration and a wide dynamic range optimized for current transformers, shunts, and Rogowski coils. The inputs can interface directly to resistor-divider networks or power-line monitoring circuitry, and the device communicates over a SPI-compatible serial interface.
Architecturally, each channel uses its own delta-sigma modulator with a shared digital filter stage, guaranteeing inherent simultaneous sampling without channel-to-channel skew. TI specifically designed the ADS131M08 for energy metering, power metrology, and circuit breaker applications, where wide dynamic range and channel-to-phase accuracy translate directly into metering class compliance.
Typical applications include polyphase smart energy meters, solar string inverters and power quality analyzers, plus power metrology in motor control and circuit breaker protection where multiple voltage and current channels must be digitized with zero sample skew.
A key design consideration is that the ADC inputs can be driven directly from resistor dividers, but anti-aliasing filter design and reference stability directly determine achievable ENOB - verify the manufacturer datasheet guidance before finalizing the analog front end.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Mga alternatibo na pwedeng ilagay na ADS131M08IRSNR — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok ADS131M08IRSNR (parehas na form factor at footprint) — pagkakaiba sa Interface, Number of Channels, Package, Power Consumption, Sampling Rate.
ADS131M06IRSNT
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
ADS131M04IRSNT
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
ADS131M02IRSNT
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
ADS131M08QPBSRQ1
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →ADS131M08IRSNR Mga Pinakamataas na Rating at Electrical Characteristics
| Pangangasiwaan | 24 bit |
| Number of Channels | 8 (simultaneous sampling) |
| Converter Type | Delta-Sigma (ΔΣ) |
| Rate ng Pagkupita | up to 32 kSPS per channel |
| Number of Inputs | 8 |
| Interface | SPI (serial) |
| Packhaging | 32-QFN (4x4 mm) |
| Uri ng Pagpapasok | Surface Mount |
| Temperature na Operasyon | -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) |
| Tindminan RoHS | Compliant (standard TI offering) |
Gabay sa Pin Configuration ng ADS131M08IRSNR 32-qfn (4x4 mm)
Pin configuration para sa ADS131M08IRSNR (32-qfn (4x4 mm) package). Ang analog component na ito ay may input, output, at power supply pins. Sumangguni sa datasheet ng manufacturer para sa offset null, compensation, at enable pin configurations. Perpekto para sa signal conditioning at amplifier circuits.
Wala ng detalyadong pinout data na magagamit para sa ADS131M08IRSNR.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
ADS131M08IRSNR ay nararapat para sa 6 aplikasyons: 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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for ADS131M08IRSNR — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | 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) |
Pangunahing mga Pagkakaiba
- Full 8-channel simultaneous sampling in a compact 4x4 mm footprint (kumpara saADS131M06IRSNT)
- Energy-measurement-specific feature set (kumpara saAD7768)
- Cost optimization path within the same footprint (kumpara saADS131M04IRSNT)
Talaan ng Disenyo
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.
Impormasyon ng Pagsunod sa Kautusan
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.
