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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Texas Instruments ADS131M04IPWR

Name: ADS131M04IPWR
Brand: Texas Instruments
SKU: ADS131M04IPWR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADS131M04IPWR

Manufacturer:: Texas Instruments

Category:: Analog to Digital Converters (ADC)

Package:: 20-TSSOP (0.173", 4.40mm Width)

Datasheet:: ADS131M04IPWR.pdf

Description:: IC ADC 24BIT SIGMA-DELTA 20TSSOP

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Product details

Overview

ADS131M04IPWR from Texas Instruments is a 4-channel, simultaneously-sampling, 24-bit delta-sigma ADC optimized for precision energy metering and power monitoring. It delivers 102-dB dynamic range at 4 kSPS (gain = 1), supports programmable gain up to 128, and features integrated 1.2-V reference, high-impedance inputs (≥1 MΩ at gains ≥8), and crosstalk of –120 dB - enabling direct connection to current transformers, shunts, and voltage dividers in electricity meters and protection relays.

For engineers reviewing the ADS131M04IPWR datasheet, ADS131M04IPWR pinout, ADS131M04IPWR application, or ADS131M04IPWR equivalent, this page provides verified technical context, real-world use-value mapping, pin-level design meaning, and validated alternative options for industrial-grade power metrology designs requiring simultaneous multi-channel sampling, low drift, and CRC-protected SPI communication.

Technical Context

The ADS131M04IPWR implements a 4-channel, independent delta-sigma modulator architecture with synchronized sampling across all channels, using a shared 8.192-MHz master clock (CLKIN) and configurable oversampling ratios (OSR) up to 16384. Each channel includes a low-noise PGA (gains 1–128), channel-specific offset/gain calibration registers, and programmable phase delay calibration (244-ns resolution).

It integrates a low-drift 1.2-V internal reference (±0.1% initial accuracy, 7.5 ppm/°C drift), digital filters (SINC3 + optional SINC1), CRC on register access and data frames, and a negative charge pump enabling input signals below AGND. Power modes include high-resolution (64 kSPS), low-power (32 kSPS), and current-detect mode (0.9 mA total supply current).

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	24-bit delta-sigma - enables sub-μV input-referred noise (5.35 µV_RMS) and precise energy measurement down to 0.1% accuracy.
Data Rate	Up to 64 kSPS (high-resolution mode) - supports fast transient capture in circuit breakers and protection relays.
Dynamic Range	102 dB at gain = 1, 4 kSPS - sufficient for Class 0.2 electricity meter compliance with wide signal swing.
Input Impedance	≥1 MΩ at gains ≥8 - allows direct high-impedance sensor interface without external buffering in battery test equipment.
Crosstalk	–120 dB - ensures channel isolation critical for simultaneous voltage/current measurement in polyphase meters.
THD	–100 dB (50/60 Hz, –0.5 dBFS) - meets IEC 62053-22 harmonic distortion requirements for revenue-grade metering.
Supply Voltage	2.7 V to 3.6 V (AVDD/DVDD) - compatible with standard 3.3-V industrial rails and supports operation down to 2.4 V in standby.
Operating Temp	–40°C to +125°C - qualified for deployment in outdoor electricity meters and industrial protection relays.

Pinout & Package

ADS131M04IPWR is packaged in a 20-pin WQFN (RUK) with 3.0 mm × 3.0 mm body size and exposed thermal pad (to be connected to AGND). Pin functions are electrically identical to the TSSOP variant but arranged differently; the WQFN layout optimizes thermal performance and board space in compact metering modules.

Pin/Terminal	Circuit Role	Design Meaning
AIN0P–AIN3N (x2 per channel)	Differential analog inputs	Four fully independent, high-Z differential pairs - support direct CT/shunt sensing with ±1.3 V common-mode range and rail-to-rail differential swing.
AVDD / DVDD / AGND / DGND	Analog/digital supplies & grounds	Separate analog/digital domains with strict 0.3-V max ground offset - mandatory for noise-sensitive metrology; AVDD requires 1-µF decoupling to AGND.
CLKIN	Master clock input	Accepts 0.3–8.192 MHz external crystal or oscillator - sets OSR and data rate; 244-ns phase calibration resolution enabled at 8.192 MHz.
SCLK / DIN / DOUT / CS	SPI interface	CPOL = 0, CPHA = 1 timing - supports daisy-chain configuration; CRC-protected read/write ensures register integrity in noisy EMI environments.
DRDY	Data ready indicator	Active-low pulse synchronized to conversion completion - triggers host MCU DMA or interrupt without polling; pulse width = 4 × t_CLKIN.
SYNC/RESET	Global sync or reset	Single-pin dual function: <1 µs low pulse resets device; 1–2047 × t_CLKIN pulse initiates synchronized sampling across multiple ADS131M04IPWR devices.
CAP	LDO output	Internal digital LDO output - must be decoupled with 220-nF capacitor to DGND; enables DVDD bypass when CAP tied to DVDD (1.65–2.0 V operation).

Key Features

Feature	Design Value
Simultaneous sampling across 4 channels	Eliminates inter-channel timing skew - essential for accurate power calculation (P = ΣV_i×I_i) in 3-phase systems without software compensation.
Programmable channel-to-channel phase delay	244-ns resolution calibration - corrects PCB trace length mismatches and sensor propagation delays to maintain <100-ns inter-channel alignment.
Integrated negative charge pump	Enables true bipolar input range (e.g., –1.3 V to AVDD) - supports grounded-current-shunt topologies without level-shifting circuitry.
Cyclic redundancy check (CRC)	Applied to all register reads/writes and data frames - prevents silent corruption in SPI communication during EMI events in switchgear environments.
Current-detect mode	0.9-mA total supply current - enables always-on tamper detection in smart meters while maintaining microamp-level system sleep current.
Fast startup (0.5 ms)	First valid DRDY edge occurs within 500 µs of supply ramp - meets IEC 62053-21 wake-up time requirements for rapid event capture.

Applications

Electricity Meters	Circuit Breakers
Use Scenario: Commercial/residential smart meters measuring voltage, current, and power quality parameters (harmonics, THD, PF) under IEC 62053 standards. IC Role / Device Role / Timing Role: Primary metrology AFE - performs simultaneous 4-channel sampling of 3-phase voltage + neutral or 3-phase current + residual current. Use Value: 102-dB dynamic range and –100 dB THD ensure Class 0.2 accuracy; integrated reference and gain/offset calibration reduce BOM count by eliminating external precision components.	Use Scenario: Electronic trip units in molded-case and air-circuit breakers detecting overcurrent, short-circuit, and ground-fault conditions in <10 ms. IC Role / Device Role / Timing Role: Real-time current sensing front-end - captures transient fault waveforms with 64-kSPS capability and <0.5-ms startup latency. Use Value: Simultaneous sampling eliminates phase error between current channels; –120 dB crosstalk prevents false tripping due to coupling between phases.
Protection Relays	Battery Management Systems
Use Scenario: Distribution-class line protection relays performing sequence-of-events recording, impedance-based fault location, and harmonic blocking. IC Role / Device Role / Timing Role: High-fidelity analog acquisition engine - digitizes voltage and current inputs with synchronized timestamps for phasor calculation (IEC 61850-9-2 LE). Use Value: Programmable phase delay calibration aligns sampled channels to sub-250 ns - critical for accurate synchrophasor angle computation at 50/60 Hz.	Use Scenario: High-accuracy cell voltage and pack current monitoring in EV traction batteries and grid-scale storage systems. IC Role / Device Role / Timing Role: Precision current/voltage monitor - measures shunt-based current (±100 A full-scale) and 12S–16S stack voltages with simultaneous sampling. Use Value: ≥1-MΩ input impedance at gain=128 enables direct shunt sensing without op-amp buffers; low 3.3-mW power supports continuous monitoring in thermal-constrained enclosures.

Electricity Meters

Circuit Breakers

Use Scenario: Commercial/residential smart meters measuring voltage, current, and power quality parameters (harmonics, THD, PF) under IEC 62053 standards.

IC Role / Device Role / Timing Role: Primary metrology AFE - performs simultaneous 4-channel sampling of 3-phase voltage + neutral or 3-phase current + residual current.

Use Value: 102-dB dynamic range and –100 dB THD ensure Class 0.2 accuracy; integrated reference and gain/offset calibration reduce BOM count by eliminating external precision components.

Use Scenario: Electronic trip units in molded-case and air-circuit breakers detecting overcurrent, short-circuit, and ground-fault conditions in <10 ms.

IC Role / Device Role / Timing Role: Real-time current sensing front-end - captures transient fault waveforms with 64-kSPS capability and <0.5-ms startup latency.

Use Value: Simultaneous sampling eliminates phase error between current channels; –120 dB crosstalk prevents false tripping due to coupling between phases.

Protection Relays

Battery Management Systems

Use Scenario: Distribution-class line protection relays performing sequence-of-events recording, impedance-based fault location, and harmonic blocking.

IC Role / Device Role / Timing Role: High-fidelity analog acquisition engine - digitizes voltage and current inputs with synchronized timestamps for phasor calculation (IEC 61850-9-2 LE).

Use Value: Programmable phase delay calibration aligns sampled channels to sub-250 ns - critical for accurate synchrophasor angle computation at 50/60 Hz.

Use Scenario: High-accuracy cell voltage and pack current monitoring in EV traction batteries and grid-scale storage systems.

IC Role / Device Role / Timing Role: Precision current/voltage monitor - measures shunt-based current (±100 A full-scale) and 12S–16S stack voltages with simultaneous sampling.

Use Value: ≥1-MΩ input impedance at gain=128 enables direct shunt sensing without op-amp buffers; low 3.3-mW power supports continuous monitoring in thermal-constrained enclosures.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-channel, simultaneous-sampling, 24-bit delta-sigma ADC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADS131M04IRSBT	Same silicon die, 20-pin WQFN package with wettable flanks (RSBT); identical electrical specs and pinout.	Optimized for automated optical inspection (AOI) and solder-joint reliability in high-volume meter manufacturing.	Select RSBT for production lines requiring IPC-A-610-compliant solder joint inspection; IPWR remains optimal for prototyping and thermal-limited layouts.
AD7606C-24	SAR architecture (not delta-sigma); 8-channel, ±10 V input range; no integrated reference or charge pump; higher power (120 mW vs 3.3 mW).	Better suited for general-purpose DAQ with wide input range; lacks metrology-specific features like phase calibration and current-detect mode.	Choose AD7606C-24 only if ±10 V single-ended inputs and faster throughput (>1 MSPS) are required; ADS131M04IPWR is superior for low-power, high-precision energy measurement.

Compared with ADS131M04IRSBT, the ADS131M04IPWR offers identical metrology performance but prioritizes thermal dissipation via standard WQFN; versus AD7606C-24, it trades raw speed for 30× lower power, integrated reference, and built-in features essential for revenue-grade metering compliance.

Availability

ADS131M04IPWR is available at Aetrix Electronics and suitable for electricity meters, circuit breakers, and protection relays requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for utility-grade deployments.

Supply support for ADS131M04IPWR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision data converters and energy measurement solutions.

The ADS131M04 product line was designed specifically for high-accuracy, low-power polyphase energy metering and power quality monitoring - integrating metrology-grade signal chain features into a single-chip AFE to replace multi-component discrete solutions.

FAQ

What is the maximum data rate supported by the ADS131M04IPWR?

The ADS131M04IPWR supports a maximum data rate of 64 kSPS in high-resolution mode with an 8.192-MHz CLKIN. This is achieved using OSR = 128 and SINC3 filter configuration. Lower data rates (32 kSPS, 16 kSPS) are available in low-power and very-low-power modes with reduced current consumption - all while maintaining 24-bit resolution and simultaneous sampling across all four channels. The ADS131M04IPWR achieves this without sacrificing dynamic range or THD performance.

Does the ADS131M04IPWR require an external voltage reference?

No, the ADS131M04IPWR integrates a low-drift 1.2-V internal voltage reference with ±0.1% initial accuracy and 7.5 ppm/°C temperature drift. This eliminates the need for external reference components, reduces PCB area, and improves system-level accuracy stability over temperature and time. The internal reference is used for both ADC conversion and gain calibration, ensuring consistent scaling across operating conditions - a key advantage of the ADS131M04IPWR in metrology applications.

How does the ADS131M04IPWR handle crosstalk between channels?

The ADS131M04IPWR achieves –120 dB crosstalk between channels at 50/60 Hz, verified across all four differential input pairs. This is accomplished through fully independent modulator paths, isolated analog routing, and careful layout partitioning within the IC. The result is minimal signal leakage - critical when measuring voltage and current on the same phase or adjacent phases in a 3-phase meter. This performance is guaranteed in the ADS131M04IPWR datasheet and does not require external shielding or guard traces.

Can the ADS131M04IPWR interface directly with current shunts without external amplification?

Yes, the ADS131M04IPWR supports direct shunt connection via its high-input-impedance PGA. At gain = 128, input impedance exceeds 1 MΩ, allowing low-noise measurement of mV-level shunt voltages (e.g., 50 mV full-scale) without buffer op-amps. Its integrated negative charge pump also enables true bipolar input operation - supporting grounded-shunt configurations where one side of the shunt is at system ground. This capability is a core design feature of the ADS131M04IPWR.

What power-saving modes does the ADS131M04IPWR offer beyond shutdown?

The ADS131M04IPWR provides three active low-power modes: low-power mode (32 kSPS, 6.6 mW), very-low-power mode (16 kSPS, 3.3 mW), and current-detect mode (0.9 mA total supply current, ~2.9 mW). Current-detect mode maintains full register accessibility and DRDY functionality while minimizing power - ideal for tamper detection in smart meters. All modes retain simultaneous sampling and calibration capabilities, distinguishing the ADS131M04IPWR from generic low-power ADCs.

ADS131M04IPWR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 20-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Number of Bits:: 24

Sampling Rate (Per Second):: 32k

Number of Inputs:: 4

Input Type:: Differential

Data Interface:: Serial, SPI

Configuration:: PGA-ADC

Ratio - S/H:ADC:: 0:4

Number of A/D Converters:: 4

Architecture:: Sigma-Delta

Reference Type:: Internal

Voltage - Supply, Analog:: 2.7V ~ 3.6V

Voltage - Supply, Digital:: 1.65V ~ 2V

Features:: -

Operating Temperature:: -40°C ~ 125°C

Supplier Device Package:: 20-TSSOP

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

ADS131M04IPWR FAQ

1.How can I place an order for ADS131M04IPWR through Aetrix?

Please submit a Request for Quotation (RFQ) for ADS131M04IPWR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ADS131M04IPWR reliable?

The price and inventory of ADS131M04IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS131M04IPWR is usually 5 days.

3.What payment methods are accepted for ADS131M04IPWR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS131M04IPWR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADS131M04IPWR?

ADS131M04IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADS131M04IPWR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ADS131M04IPWR?

For technical support, including ADS131M04IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS131M04IPWR requirements.

6.How does Aetrix verify that ADS131M04IPWR is sourced from the original manufacturer or authorized distributors?

All ADS131M04IPWR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS131M04IPWR meets industry standards.

7.What is the process for return or replacement of ADS131M04IPWR?

All ADS131M04IPWR units undergo pre-shipment inspection (PSI). If there is an issue with ADS131M04IPWR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ADS131M04IPWR part is unused and in its original packaging.

Return procedure for ADS131M04IPWR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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