ADS131M08IPBSR - 24-Bit 8-Ch 32kSPS Delta-Sigma ADC | TI
MPN: ADS131M08IPBSR ✓ פעילADS131M08IPBSR סקירה
A simultaneous-sampling delta-sigma ADC is a precision data-converter architecture in which every channel is digitized at the same instant by its own ΔΣ modulator, eliminating the skew and phase error inherent to multiplexed ADCs. Within the signal-chain hierarchy (sensor front end -> precision ADC -> digital controller), simultaneous sampling is essential for power metrology, where voltage and current channels must be phase-aligned to compute real power, power factor, and harmonic content accurately.
Key features include full 24-bit resolution, per-channel oversampling with programmable data rates up to 32 kSPS, wide dynamic range, and low power operation. TI designed the family with energy-measurement-specific features such as a dedicated CRC on the serial interface for communication integrity, direct interfacing to resistor-divider networks and current transformers or Rogowski-coil front ends, and synchronized clocking across multiple devices for polyphase metering.
Architecturally, each of the eight channels integrates its own ΔΣ modulator and digital decimation filter, allowing all eight inputs to be sampled at exactly the same moment. This removes interchannel phase mismatch, a critical requirement for three-phase energy metering where per-phase voltage-current pairing must remain phase-accurate across the entire measurement bandwidth.
Typical applications include single- and polyphase electricity meters, power-quality analyzers, circuit breakers and protective relays, solar string inverters, and precision power metrology in industrial instrumentation. The wide dynamic range supports shunt- and CT-based current sensing without front-end gain stages.
When designing with the ADS131M08IPBSR, provide a clean analog supply, synchronize the SPI host clocking to the ADC frame timing, and account for anti-alias filtering ahead of the modulator inputs at the selected OSR and data rate.
This page synthesizes distributor pricing, drop-in alternatives within the ADS131M family, application guidance, and design notes not found in the manufacturer datasheet.
חלופות תחליף ישיר עבור ADS131M08IPBSR — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם ADS131M08IPBSR (אותו גורם צורה וטביעת רגל) — שונים ב Interface, Package, Number of Channels, Sampling Rate, Architecture.
ADS131M08QPBSRQ1
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ADS131M06IPBSR
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
ADS131M04IPBSR
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
ADS131M08IPBSR דירוגים מרביים ומאפיינים חשמליים
| רזולוציה | 24 bit |
| Number of Channels | 8 |
| קצב דגימה | 32 kSPS |
| Architecture | Delta-Sigma (ΔΣ), simultaneous sampling |
| ממשק | SPI (serial) |
| מארז | 32-TQFP (PBS), 5x5 mm |
| טווח טמפרטורת פעולה | -40C to +125C |
| סוג הרכבה | Surface Mount |
| רמת MSL | 2 (260C, 1 year) |
| סטטוס RoHS | Compliant |
| Packaging | Tape & Reel (R suffix) |
| קטגוריה | Analog to Digital Converters - ADC |
| REACH Status | unknown |
מדריך תצורת פינים של ADS131M08IPBSR 32-tqfp (pbs), 5x5 mm
תצורת פינים עבור ADS131M08IPBSR (מארזת 32-tqfp (pbs), 5x5 mm). רכיב אנלוגי זה כולל פיני כניסה, יציאה ואספקת מתח. יש לעיין בגיליון הנתונים של היצרן לתצורות פיני איפוס היסט, פיצוי והפעלה. אידיאלי למעגלי עיצוב אותות ומגברים.
אין נתוני פריסת פינים מפורטים עבור ADS131M08IPBSR.
עיינו ב- גיליון נתונים עבור תצורת פינים מלאה.
יישומים טיפוסיים
ADS131M08IPBSR מתאים עבור 6 יישוםs: Polyphase Energy Metering, Circuit Breakers and Protective Relays, Solar String Inverters and PV Monitoring, Power Quality Analyzers, Motor Drive and Servo Current Sensing, Battery Management and EV Charging Stations.
Polyphase Energy Metering
The ADS131M08IPBSR was purpose-built by TI for energy metering, and its eight simultaneous 24-bit channels map directly onto a three-phase meter: three voltage channels via resistor dividers, three current channels via CTs or shunts, plus neutral current and an auxiliary input. Because all eight channels are digitized by independent ΔΣ modulators at the same instant, interchannel phase error is eliminated - essential for accurate real and reactive power computation across 50/60 Hz fundamentals and their harmonics. The 32-kSPS maximum data rate provides ample oversampling margin, and the CRC-protected SPI link safeguards revenue-grade data integrity in the final meter product.
מומלץ
Circuit Breakers and Protective Relays
In circuit-breaker and protective-relay electronics, current and voltage channels must be sampled simultaneously so that protection algorithms (overcurrent, differential, power-direction detection) can act on phase-accurate data. The ADS131M08IPBSR provides eight simultaneous 24-bit channels at up to 32 kSPS, giving relay firmware high-resolution waveforms with no channel-to-channel skew. Its wide dynamic range accommodates both the small quiescent-signal regime and the large fault transients typical of breaker sensing, and the CRC on the serial interface adds a communication integrity check consistent with protection-equipment reliability expectations. The -40C to +125C operating range supports harsh substation and panel environments.
מומלץ
Solar String Inverters and PV Monitoring
Grid-tied solar inverters require phase-aligned sampling of PV-side and grid-side voltages and currents to implement MPPT, anti-islanding, and grid power-quality compliance. The ADS131M08IPBSR's eight simultaneous channels capture DC input, AC output voltage, and output current waveforms without multiplexer skew, while 24-bit resolution resolves the small ripple components used for MPPT decisions. The direct resistor-divider interface for voltage channels and CT/Rogowski support for current channels reduces front-end complexity and cost. The TI reference-design ecosystem also documents pairing this ADC with C2000 MCUs for precise bidirectional power-stage control in inverter topologies.
מומלץ
Power Quality Analyzers
Power-quality analyzers measure harmonics, flicker, sags, and swells, which demands simultaneous, high-resolution capture of all phases. The ADS131M08IPBSR samples eight channels at the same instant with 24-bit resolution and up to 32-kSPS output rate, providing the bandwidth to characterize harmonics well beyond the 40th order of a 50/60 Hz fundamental while maintaining channel phase alignment for direction and power-factor calculations. Its programmable oversampling lets the analyzer trade bandwidth against noise floor per IEC-style measurement profiles, and the energy-metering-specific feature set (CRC-checked SPI, direct divider interfacing) simplifies the signal chain in portable and panel-mounted PQ instruments.
מומלץ
Motor Drive and Servo Current Sensing
Precision motor-control systems benefit from simultaneously sampled phase currents, because torque calculations and field-oriented control assume instantaneous phase alignment. A TI reference design demonstrates exactly this topology: a C2000 MCU controlling a bidirectional interleaved buck power stage with the ADS131M08 providing precision current and voltage feedback. In a three-phase servo drive, three of the eight channels capture motor phase currents via shunts while others monitor DC bus voltage and temperature-derived signals, all sampled with zero skew. The 24-bit resolution enables low-shunt-value sensing with minimal power loss, improving drive efficiency without sacrificing control-loop accuracy.
מומלץ
Battery Management and EV Charging Stations
DC fast-charging stations and battery-test systems need accurate, phase-consistent measurement of voltage and current to compute delivered energy within billing-grade accuracy. The ADS131M08IPBSR digitizes up to eight sense points simultaneously at 24-bit resolution, letting one device cover multiple charging ports or a battery pack's current shunt, bus voltage, and auxiliary channels without multiplexing artifacts. Its -40C to +125C temperature range suits outdoor EVSE enclosures, and the CRC-protected SPI interface maintains data integrity across the isolation barrier when combined with a digital isolator. For automotive-qualified deployments, the pin-compatible ADS131M08QPBSRQ1 variant applies directly.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור ADS131M08IPBSR — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | ADS131M08QPBSRQ1 | ADS131M06IPBSR | ADS131M04IPBSR | AD7768-4 |
|---|---|---|---|---|---|
| Package | 32-TQFP (PBS), 5x5 mm | 32-TQFP (PBS), 5x5 mm - same | 32-TQFP (PBS), 5x5 mm - same | 32-TQFP (PBS), 5x5 mm - same | Different package/pinout - not drop-in |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit | 24 bit |
| Channels | 8 simultaneous | 8 simultaneous | 6 simultaneous | 4 simultaneous | 4 simultaneous |
| Max Sample Rate | 32 kSPS | 32 kSPS | 32 kSPS | 32 kSPS | 256 kSPS |
| Interface | SPI with CRC | SPI with CRC | SPI with CRC | SPI with CRC | SPI |
מבדילים עיקריים
- Eight simultaneous channels in one package (לעומתADS131M04IPBSR)
- Energy-metering-specific feature set (לעומתAD7768-4)
- Metrology bandwidth efficiency (לעומתAD7768-4)
הערות תכנון
Provide clean, well-decoupled analog and digital supplies and a low-jitter master clock - delta-sigma noise performance depends directly on clock quality and supply ripple. Place 100 nF ceramic decoupling capacitors at each supply pin as close to the device as possible, with bulk capacitance nearby. Separate the analog ground region under the TQFP from the SPI digital return path, joining them at a single point to keep digital switching currents out of the analog front end.
Front-end conditioning determines achievable accuracy: use precision resistor dividers for voltage channels sized for power dissipation and ratio drift, and burden or sense networks matched per channel for CT inputs. Because channels sample simultaneously, mismatch between channel front ends shows up directly as gain/phase error in power calculations - use 0.1% or better resistors for metrology-grade accuracy. Anti-alias filtering ahead of the modulator inputs should be selected for the chosen oversampling ratio and data rate.
Frame timing on the SPI interface is fixed by the ADC: the host must read conversion data within the defined frame window or data is lost - do not assume arbitrary SPI transaction timing. When synchronizing multiple ADS131M08 devices for polyphase systems, route SYNC and clock lines with matched lengths. For handling, note MSL 2 rating (260C, 1 year floor-life) - reflow-baked or sealed storage is required if floor life is exceeded.
מידע על תאימות
RoHS compliant per distributor compliance data (PartGenie: RoHS Compliant, MSL Level 2-260C-1 YEAR). Not AEC-Q100 qualified - use ADS131M08QPBSRQ1 for automotive. REACH and conflict-minerals status not stated in provided data.
