My Inquiry
My Account
Texas Instruments INA231AIYFDT
- Part No.:
- INA231AIYFDT
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 12-XFBGA, DSBGA
- Datasheet:
-
INA231AIYFDT.pdf
- Description:
- IC CURRENT MONITOR 0.5% 12DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,227
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA231AIYFDT from Texas Instruments is a 16-bit I²C-output current, voltage, and power monitor IC for high- or low-side shunt sensing in 0 V to 28 V bus systems. It delivers ±50 µV shunt offset, 0.5% gain error, and 330 µA quiescent current, enabling real-time power telemetry in space-constrained mobile power rails.
For engineers reviewing the INA231AIYFDT datasheet, INA231AIYFDT pinout, INA231AIYFDT application, or INA231AIYFDT equivalent, this page provides verified pin functions, calibrated current/power readout capability, alert-triggered over-limit detection, and DSBGA-12 (YFD) package integration guidance for battery management and server VRM monitoring.
Technical Context
The INA231AIYFDT integrates dual 16-bit ADCs-one for differential shunt voltage (±81.92 mV range, 2.5 µV LSB) and one for bus voltage (0–28 V, 1.25 mV LSB)-with on-chip multiplier and calibration register to output current in amperes and power in watts directly via I²C. Its internal averaging engine supports 1–1024 samples per conversion cycle.
It operates from 2.7 V to 5.5 V supply while monitoring up to 28 V common-mode bus voltages, with independent power sequencing tolerance. The ALERT pin provides open-drain, programmable threshold response for SOL, SUL, BOL, BUL, or POL events-or conversion-ready notification-without host CPU polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bus voltage range | 0 V to 28 V - enables direct monitoring of 12 V/24 V power rails without level-shifting |
| Shunt voltage range | ±81.92 mV - supports precise current sensing with 100 µΩ–10 mΩ shunts |
| ADC resolution | 16 bits - delivers 2.5 µV LSB (shunt) and 1.25 mV LSB (bus) for sub-mA current resolution |
| Gain error (max) | 0.5% - ensures <±10 mA absolute error at 2 A full-scale with typical 1 mΩ shunt |
| Quiescent current | 330 µA (typ) - allows always-on monitoring in battery-backed systems without significant drain |
| I²C interface | 1.8-V compliant, up to 2.5 MHz - interoperates with modern low-voltage microcontrollers and SoCs |
| Operating temp | –40°C to +125°C - qualified for automotive cabin and industrial power module environments |
Pinout & Package
INA231AIYFDT uses the YFD (DSBGA-12) package: 1.65 mm × 1.39 mm × 0.40 mm, ball-pitch 0.4 mm, with solder-balls on bottom side only. Thermal resistance RθJA = 83.8°C/W enables operation at full spec without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1 | I²C address select inputs | Configure one of 16 unique I²C addresses by tying to GND, VS, SCL, or SDA - eliminates address conflicts in multi-monitor systems |
| ALERT | Open-drain alert output | Asserts when programmed limit (e.g., bus overvoltage or power overload) is exceeded - reduces host polling overhead |
| GND | Analog ground reference | Primary return path for shunt and bus measurements - must be connected to system power ground plane |
| SCL, SDA | I²C clock/data lines | 1.8-V tolerant, 2.5-MHz capable - compatible with ARM Cortex-M, ESP32, and Raspberry Pi I²C peripherals |
| BUS | Bus voltage input | Measures 0–28 V supply rail directly - no external divider required for ≤28 V systems |
| IN+, IN− | Differential shunt inputs | Accept ±81.92 mV across sense resistor - supports bidirectional current measurement with proper layout |
| VS | Supply voltage input | 2.7–5.5 V logic supply - powers digital core and ADCs independently from monitored bus |
| NC (B2, C2) | No-connect terminals | Internally tied to VS and GND respectively - must remain floating per datasheet; no PCB trace connection |
Key Features
| Feature | Design Value |
|---|---|
| Direct current/power readout | Internal multiplier + calibration register outputs current (A) and power (W) as integers - eliminates host-side math and scaling errors |
| Configurable averaging | 1–1024 sample averaging per conversion - trades speed (140 µs min) for noise reduction (up to 10-bit ENOB improvement) |
| Programmable alert thresholds | Single Alert Limit register (07h) + Mask/Enable register (06h) - enables hardware-triggered fault response without firmware intervention |
| Startup mode selection | INA231A variant (like INA231AIYFDT) powers up in continuous conversion - ready for immediate telemetry after power-on reset |
| High CMR performance | 100–120 dB common-mode rejection - maintains accuracy despite ground bounce or switching noise on high-current paths |
Applications
| Smartphone Power Management | Server VRM Monitoring |
|---|---|
Use Scenario: Real-time battery charge/discharge current, system rail voltage, and instantaneous power draw during CPU/GPU load transitions. IC Role / Device Role / Timing Role: Current/voltage/power monitor with I²C interface, providing telemetry every 140 µs–9 ms depending on averaging setting. Use Value: Enables dynamic thermal throttling and battery life estimation using calibrated current readings without host-side computation. | Use Scenario: Continuous monitoring of 12 V input rail and 0.8–1.8 V CPU/GPU VRM output rails for overcurrent, overvoltage, and power surge detection. IC Role / Device Role / Timing Role: High-side or low-side shunt monitor feeding telemetry to BMC or host controller via I²C at configurable update rates. Use Value: Detects VRM faults within milliseconds using hardware-alerted thresholds, reducing reliance on slow software polling loops. |
| USB-C PD Power Delivery | Industrial PLC Power Rails |
Use Scenario: Measuring source/sink current and bus voltage on USB-C ports supporting up to 100 W (20 V/5 A) delivery. IC Role / Device Role / Timing Role: Bidirectional current monitor interfaced to PD controller MCU, reporting real-time power negotiation status. Use Value: Validates negotiated power contracts and triggers disconnect on overcurrent - critical for USB-IF compliance testing. | Use Scenario: Monitoring 24 V DC input and isolated 5 V/3.3 V control rails in programmable logic controllers under variable load conditions. IC Role / Device Role / Timing Role: Always-on power telemetry node with 125°C rating, reporting via RS-485 gateway or local HMI. Use Value: Provides early warning of aging power components (e.g., capacitor ESR rise) through trending of current harmonics and rail droop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current/voltage/power monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA226AIDGSR | Higher 0.1% gain error spec, 2.116 ms max conversion time, supports bidirectional current sensing natively | Preferred for precision energy metering where directionality and long-term stability outweigh speed requirements | Select when ±0.1% gain error and guaranteed bidirectional operation are mandatory; requires different calibration flow |
| INA219BIDR | Integrated 2.1 V LDO, fixed 12-bit resolution, lower 1.2 mA quiescent current, no programmable averaging | Targeted at cost-sensitive consumer electronics with simpler power monitoring needs | Choose for ultra-low-cost designs where 12-bit resolution and fixed 52 µV shunt LSB suffice |
Compared with INA231AIYFDT, the INA226AIDGSR offers tighter gain accuracy but slower updates, while the INA219BIDR reduces BOM count with integrated LDO at the expense of resolution and configurability - making INA231AIYFDT optimal for compact, high-speed, calibrated telemetry in 28 V systems.
Availability
INA231AIYFDT is available at Aetrix Electronics and suitable for smartphone power management, server VRM monitoring, and USB-C PD power delivery requiring stable component supply across high-volume production cycles.
Supply support for INA231AIYFDT 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 signal chain and power management ICs.
The INA231 product line was designed specifically for real-time, calibrated power telemetry in space-constrained, high-efficiency power systems - targeting mobile, computing, and industrial applications demanding accurate current, voltage, and power readouts over I²C.
FAQ
What is the maximum bus voltage the INA231AIYFDT can measure?
The INA231AIYFDT supports a bus voltage input range of 0 V to 28 V. Although its internal ADC has a 40.96 V full-scale code, the absolute maximum voltage applied to the BUS pin is strictly limited to 28 V per the datasheet's Recommended Operating Conditions. Exceeding 28 V risks damage or parametric failure. This makes INA231AIYFDT ideal for 12 V and 24 V industrial and computing rails, but unsuitable for 48 V systems without external attenuation.
Does the INA231AIYFDT support bidirectional current measurement?
Yes, the INA231AIYFDT supports bidirectional current measurement through its differential shunt inputs (IN+ and IN−), which accept ±81.92 mV. When the shunt voltage polarity reverses, the signed 16-bit shunt voltage register reflects negative values, enabling host firmware to determine current direction. However, unlike the INA226, it does not auto-detect direction in hardware - interpretation is performed in software using the raw shunt voltage or calculated current register.
What is the purpose of the A0 and A1 pins on the INA231AIYFDT?
The A0 and A1 pins on the INA231AIYFDT are digital address configuration inputs that set the device's 4-bit I²C slave address. Each pin can be tied to GND, VS, SCL, or SDA, yielding 16 unique combinations (0x40–0x4F). This allows up to 16 INA231AIYFDT devices on a single I²C bus without address conflict - essential in multi-rail servers or modular power systems where independent monitoring of each supply is required.
How does the ALERT pin function on the INA231AIYFDT?
The ALERT pin on the INA231AIYFDT is an open-drain output that asserts low when a user-programmed condition occurs - such as shunt voltage overlimit (SOL), bus voltage overlimit (BOL), or power overlimit (POL). It is configured via the Alert Limit register (07h) and Mask/Enable register (06h). The pin can also signal conversion-ready status (CVRF). No external pull-up is mandatory, but a 4.7 kΩ resistor to 1.8–3.3 V is recommended for reliable logic-level interfacing with host MCUs.
What package type is used by the INA231AIYFDT, and what are its key mechanical properties?
The INA231AIYFDT uses the YFD package: a 12-ball DSBGA (Die Size Ball Grid Array) measuring 1.65 mm × 1.39 mm × 0.40 mm with 0.4 mm ball pitch. Its ultra-thin profile and small footprint make it suitable for PCBs with strict height constraints, such as smartphone mainboards or PCIe add-in cards. Thermal resistance is RθJA = 83.8°C/W, enabling full-spec operation at +85°C ambient without heatsinking in typical 2-layer layouts.
INA231AIYFDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-XFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Current Monitor
- Sensing Method:
- High/Low-Side
- Accuracy:
- ±0.5%
- Voltage - Input:
- 0V ~ 28V
- Current - Output:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DSBGA (1.65x1.39)
INA231AIYFDT FAQ
1.How can I place an order for INA231AIYFDT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA231AIYFDT 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 INA231AIYFDT reliable?
The price and inventory of INA231AIYFDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA231AIYFDT is usually 5 days.
3.What payment methods are accepted for INA231AIYFDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA231AIYFDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA231AIYFDT?
INA231AIYFDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA231AIYFDT 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 INA231AIYFDT?
For technical support, including INA231AIYFDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA231AIYFDT requirements.
6.How does Aetrix verify that INA231AIYFDT is sourced from the original manufacturer or authorized distributors?
All INA231AIYFDT 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 INA231AIYFDT meets industry standards.
7.What is the process for return or replacement of INA231AIYFDT?
All INA231AIYFDT units undergo pre-shipment inspection (PSI). If there is an issue with INA231AIYFDT, 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 INA231AIYFDT part is unused and in its original packaging.
Return procedure for INA231AIYFDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA231AIYFDT Tags
.jpg)
-
PSSI2021SAY,115
Nexperia USA Inc.
-
BCR401RE6327HTSA1
Infineon Technologies
-
INA199B2DCKR
Texas Instruments
-
INA199A1DCKR
Texas Instruments
-
INA199B1DCKR
Texas Instruments
-
NSI45015WT1G
onsemi
-
NSI45020T1G
onsemi
-
NSI45030AT1G
onsemi
-
NSI45025AT1G
onsemi
-
NSI45020AT1G
onsemi
-
NSI50010YT1G
onsemi
-
LM334Z/NOPB
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
