ADS131M08 - 8-Ch 24-Bit 32kSPS Delta-Sigma ADC | TI
MPN: ADS131M08 ✓ نشطADS131M08 نظرة عامة
A delta-sigma ADC oversamples the input signal and applies digital filtering to achieve very high resolution, making this converter category the dominant choice for precision measurements such as power metering. Within the signal-chain hierarchy, the ADS131M08 sits between analog front-end conditioning (resistor dividers, current transformers, shunts) and the digital MCU that processes energy computations.
Key features include eight simultaneously sampling differential inputs, programmable output data rate up to 32 kSPS, and programmable gain up to 128. Noise performance is 102-dB dynamic range at gain = 1 and 4 kSPS, and 80-dB dynamic range at gain = 64 and 4 kSPS. The device integrates a low-drift internal voltage reference, allowing ADC inputs to interface directly to resistor-divider networks or current-sensing elements without external precision references.
The simultaneous-sampling architecture is critical for polyphase energy metering: all eight channels convert at the same instant, preserving phase relationships between voltage and current channels needed for accurate active, reactive, and apparent power calculations. The ADS131M08 is AEC-Q100 qualified (temperature grade 1, -40C to +125C ambient) and Functional Safety-Capable, with documentation available to support functional safety system design, enabling automotive and industrial metering use.
Typical applications include three-phase smart energy meters, power quality analyzers, protective relay and circuit breaker monitoring, and solar inverter MPPT sensing. In a bidirectional interleaved buck-converter reference design, TI pairs the ADS131M08 with a C2000 MCU for precise current and voltage control.
Design tip: at gain = 64 the input-referred noise rises, so size shunt resistance and gain together to balance dynamic range against full-scale headroom.
بدائل مباشرة لـ ADS131M08 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع ADS131M08 (نفس عامل الشكل والبصمة) — يختلف في Number of Channels, Package, Application Focus, Input Type, Interface.
ADS131M08IPBS
✅ بديل مباشر✗ غير متوفر
$3.85 / وحدة
عرض ورقة البيانات ←ADS131M08QPBSRQ1
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ADS131M06IPBS
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
ADS131M04IPBS
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
ADS131E08IPBS
⚡ نفس الحزمة📋 بديل مرجعي (غير موجود في الكتالوج)
ADS131M08 الحدود القصوى والخصائص الكهربائية
| الدقة | 24 bit |
| Number of Channels | 8 differential inputs |
| Sampling Architecture | Simultaneously sampling delta-sigma |
| معدل البيانات | Programmable, up to 32 kSPS |
| Programmable Gain | Up to 128 |
| Dynamic Range (Gain=1, 4 kSPS) | 102 dB |
| Dynamic Range (Gain=64, 4 kSPS) | 80 dB |
| Reference | Internal low-drift reference |
| Input Interface | Direct resistor-divider or current-sensor connection |
| AEC-Q100 | Qualified, temperature grade 1 (-40C to +125C TA) |
| Functional Safety | Functional Safety-Capable (documentation available) |
| العلبة | 32-TQFP (PBS), 5x5 mm |
| نوع التركيب | Surface Mount |
| Application Focus | Energy metering, power metrology, circuit breakers |
| Power | Low power |
دليل تكوين أطراف ADS131M08 32-tqfp (pbs), 5x5 mm
تكوين الأطراف لـ ADS131M08 (حزمة 32-tqfp (pbs), 5x5 mm). يتميز هذا المكوّن التناظري بأطراف الإدخال والإخراج وإمداد الطاقة. راجع ورقة بيانات الشركة المصنعة لتكوينات طرف إلغاء الإزاحة والتعويض والتمكين. مثالي لدوائر تكييف الإشارة والمضخمات.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ ADS131M08.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
ADS131M08 مناسب لـ 6 التطبيقs: Three-Phase Smart Energy Metering, Circuit Breaker and Protective Relaying, Solar Inverter MPPT and Grid Monitoring, Power Quality Analyzers, Motor Control Current Sensing, Battery Management and Test Equipment.
Three-Phase Smart Energy Metering
The ADS131M08's eight simultaneously sampling differential inputs capture all three phase voltages and currents (plus neutral) at the same instant, eliminating inter-channel skew that corrupts active and reactive power calculations. With 102-dB dynamic range at gain 1 and 4 kSPS, plus a low-drift internal reference, it interfaces directly to resistor dividers and current transformers without external precision references. The 32-kSPS rate supports harmonic analysis for modern metering accuracy classes.
موصى به
Circuit Breaker and Protective Relaying
Protective circuit breakers require simultaneous, wide-dynamic-range measurement of phase currents and voltages to detect faults quickly and trip reliably. The ADS131M08's simultaneous sampling preserves phase relationships across channels, while 80-dB dynamic range at gain 64 allows direct small shunt signals. AEC-Q100 grade 1 qualification (-40C to +125C) on the Q1 variant and Functional Safety-Capable documentation support safety-relevant protection designs in industrial and automotive breakers.
موصى به
Solar Inverter MPPT and Grid Monitoring
Grid-tied solar inverters need precise simultaneous voltage and current measurement on both DC and AC sides for maximum power point tracking, anti-islanding, and grid code compliance. The ADS131M08's eight differential channels monitor multiple strings and grid phases concurrently, and its 24-bit resolution with 102-dB dynamic range at 4 kSPS resolves small panel current differences. TI's reference design pairs it with a C2000 MCU for precise bidirectional buck-converter control.
موصى به
Power Quality Analyzers
Power quality instruments measure harmonics, flicker, sags, and swells across multiple channels simultaneously. The ADS131M08's programmable 32-kSPS maximum data rate supports harmonic analysis well beyond the 50th order at 50/60 Hz, while 24-bit resolution and the low-drift internal reference maintain measurement accuracy over temperature. Simultaneous sampling of all eight differential inputs ensures phase-accurate cross-channel measurements required by power quality standards.
موصى به
Motor Control Current Sensing
High-performance motor drives use inline shunt current sensing for field-oriented control. The ADS131M08's programmable gain up to 128 amplifies small shunt voltages directly, and simultaneous sampling synchronizes all phase-current measurements with the control loop. With a 32-kSPS data rate and low latency delta-sigma architecture, it feeds C2000 MCUs executing FOC algorithms; the 80-dB dynamic range at gain 64 resolves currents across wide load ranges in industrial drives and robotics.
موصى به
Battery Management and Test Equipment
Battery test systems and BMS development tools require precise, simultaneous multi-cell voltage and current measurement. The ADS131M08's eight 24-bit differential channels monitor cell voltages and pack current concurrently, while the low-drift internal reference and 102-dB dynamic range at gain 1 deliver the millivolt-level accuracy needed for state-of-charge estimation. The SPI interface integrates easily with host MCUs, and low power operation suits rack-mounted cyclers and portable analyzers alike.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ADS131M08 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | ADS131M08IPBS | ADS131M08QPBSRQ1 | ADS131M04IPBS |
|---|---|---|---|---|
| Package | 32-TQFP (PBS) 5x5 mm | 32-TQFP (PBS) - same | 32-TQFP (PBS) - same | 32-TQFP (PBS) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Channels | 8 simultaneous | 8 simultaneous | 8 simultaneous | 4 simultaneous |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit |
| Max Data Rate | 32 kSPS | 32 kSPS | 32 kSPS | 32 kSPS |
| Dynamic Range (G=1, 4 kSPS) | 102 dB | 102 dB | 102 dB | 102 dB |
| AEC-Q100 Qualified | Q1 variant available | No (industrial) | Yes (grade 1) | Q1 variant available |
| Reference | Internal low-drift | Internal low-drift | Internal low-drift | Internal low-drift |
أبرز الفروقات
- Eight simultaneous channels in one footprint (مقابلADS131M04IPBS)
- Automotive AEC-Q100 grade 1 option (مقابلADS131M08IPBS)
- Higher data rate than E-family (مقابلADS131E08IPBS)
ملاحظات التصميم
Simultaneous sampling only helps if the front end is symmetric. Match anti-alias filter components and trace lengths across all eight differential input pairs so voltage and current channels preserve phase relationships. TI's energy metering reference designs use matched RC filters per channel before the ADC inputs.
At programmable gain 64, dynamic range drops to 80 dB (at 4 kSPS), so a small shunt signal gains amplification but loses noise headroom. Size shunt resistance and gain together: choose gain so maximum expected shunt voltage fills the input full-scale without clipping at fault currents.
Use the low-drift internal reference to save BOM cost, but if board-level accuracy class demands it, evaluate the analog supply and reference decoupling per the TI datasheet layout guidance. Keep the delta-sigma modulator clocks away from the analog inputs and use a solid ground plane under the 5x5 mm TQFP.
معلومات الامتثال
AEC-Q100 qualified (temperature grade 1, -40C to +125C) per TI datasheet for the Q1 variant. Functional Safety-Capable with supporting documentation. Other compliance statuses not stated in provided data.
