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Texas Instruments INA236AIYBJR
- Part No.:
- INA236AIYBJR
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 8-XFBGA, DSBGA
- Datasheet:
-
INA236AIYBJR.pdf
- Description:
- IC CURRENT MONITOR 0.015% 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:5,025
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Product details
Overview
INA236AIYBJR from Texas Instruments is a 16-bit ultra-precise digital current, voltage, and power monitor IC with I²C/SMBus interface, designed for high-side or low-side shunt sensing in systems with bus voltages up to 48 V. It delivers 0.1% gain error, 5 µV max shunt offset, 1.7–5.5 V supply operation, and operates across –40°C to +125°C - enabling accurate real-time power telemetry in space-constrained battery-powered devices.
For engineers reviewing the INA236AIYBJR datasheet, INA236AIYBJR pinout, INA236AIYBJR application, or INA236AIYBJR equivalent, key selection criteria include its ±0.3 V to 48 V common-mode input range, programmable 20 mV/80 mV full-scale shunt range, 1.2-V I²C compliance, dual device address options (A/B), and DSBGA-8 (0.745 mm × 1.508 mm) package - all critical for compact, multi-rail power monitoring designs.
Technical Context
The INA236AIYBJR integrates a low-offset 16-bit delta-sigma ADC multiplexed between shunt voltage (IN+ to IN–) and bus voltage (IN– to GND) inputs, supporting independent measurement timing and configurable averaging (1–1024 samples). Its internal calibration multiplier enables direct readout of current in amperes and power in watts without host-side computation.
It features an open-drain ALERT pin configurable for five distinct alert functions - shunt over/underlimit, bus over/underlimit, or power overlimit - with latchable or transparent behavior, plus conversion-ready notification. The device supports both continuous and triggered conversion modes, with conversion times ranging from 133 µs to 8.656 ms depending on ADC configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 16-bit delta-sigma - provides 65,536 discrete steps for shunt voltage, bus voltage, and calculated power values. |
| Shunt Gain Error | ±0.1% max - ensures current measurement accuracy remains stable across temperature and supply voltage variations. |
| Shunt Offset Voltage | ±5 µV max - enables precise sub-mA current sensing using higher-value shunt resistors with minimal power loss. |
| Common-Mode Range | –0.3 V to 48 V - allows monitoring of high-voltage rails (e.g., 48 V PoE, battery stacks) while powered from low-voltage logic rails (1.7–5.5 V). |
| I²C Interface | 1.2-V compliant SMBus - interoperates with 1.2 V, 1.8 V, 3.3 V, and 5.0 V digital buses without level-shifting circuitry. |
| Supply Current | 300 µA typical active / 2.2 µA standby - supports always-on power monitoring in energy-sensitive wearables and IoT endpoints. |
| Operating Temperature | –40°C to +125°C - qualified for automotive cabin, industrial control, and telecom infrastructure environments. |
Pinout & Package
INA236AIYBJR is housed in an 8-bump DSBGA package (YBJ), measuring 0.745 mm × 1.508 mm with 0.4-mm pitch. This ultra-compact wafer-level chip-scale package supports high-density PCB layouts and thermal performance optimized for low-power sensing applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Analog input (shunt positive) | Connects to high-side bus or load-side shunt terminal; differential input with IN– for current sensing. |
| IN– | Analog input (shunt negative / bus reference) | Serves as current sense return and bus voltage reference point; measures common-mode voltage up to 48 V. |
| GND | Analog/digital ground | Single ground connection for both analog signal path and digital interface; requires low-impedance layout. |
| VS | Power supply | 1.7–5.5 V supply input; powers internal circuitry and I²C interface; independent of IN+/IN– common-mode voltage. |
| SCL | Digital input (I²C clock) | Open-drain input accepting 1.2–5.5 V logic; supports Fast Mode (400 kHz) and High-Speed Mode (up to 2.94 MHz). |
| SDA | Digital I/O (I²C data) | Open-drain bidirectional line; shares bus with other I²C peripherals; requires external pull-up resistor. |
| A0 | Digital input (address select) | Configures I²C slave address: tied to GND, SCL, SDA, or VS selects one of four possible addresses (two per A/B variant). |
| ALERT | Digital output (open-drain) | Asserts on user-configurable fault conditions (e.g., overcurrent) or conversion completion; supports interrupt-driven firmware polling. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable full-scale shunt range | 20 mV or 80 mV - selects optimal ADC resolution for either high-precision low-current or robust high-current sensing. |
| Configurable averaging | 1–1024 samples - trades off measurement speed vs. noise rejection; essential for stable readings in noisy DC-DC converter environments. |
| Internal calibration multiplier | Direct current (A) and power (W) register outputs - eliminates host MCU floating-point math and scaling lookup tables. |
| General call addressing | Synchronizes conversions across multiple INA236AIYBJR devices on same I²C bus - enables time-aligned multi-rail power profiling. |
| Low input bias current | ≤10 nA max - permits use of RC filtering at IN+/IN– without degrading accuracy, improving EMI immunity in motor or RF-rich systems. |
Applications
| Mobile Power Management | Smart Speaker Power Telemetry |
|---|---|
|
Use Scenario: Real-time battery discharge profiling and charge termination in smartphones and tablets with dual-cell Li-ion packs. IC Role / Device Role / Timing Role: Measures shunt current and 4.2–4.4 V bus voltage simultaneously to compute instantaneous power draw and remaining capacity. Use Value: Enables adaptive CPU/GPU throttling based on actual system power consumption, extending runtime by up to 12% versus fixed-threshold schemes. |
Use Scenario: Monitoring Class-D amplifier rail current and 12 V supply voltage in voice-assistant speakers with always-on wake-word detection. IC Role / Device Role / Timing Role: Provides synchronized current/voltage sampling at 1 kHz to detect abnormal surge events during audio playback or firmware updates. Use Value: Triggers immediate thermal shutdown before MOSFET failure, reducing field return rate by detecting early-stage overcurrent faults missed by discrete fuses. |
| Wearable Health Sensor Hub | Rack Server 48 V PDN Monitoring |
|
Use Scenario: Ultra-low-power current monitoring of optical heart-rate sensor and Bluetooth LE radio in fitness trackers. IC Role / Device Role / Timing Role: Operates in standby mode (2.2 µA) between 100-ms sensing bursts; measures sub-100 µA currents via 1 Ω shunt at 20 mV range. Use Value: Achieves >2-week battery life while maintaining <1% current measurement error - critical for clinical-grade biometric accuracy. |
Use Scenario: Distributed current monitoring across 48 V intermediate bus converters feeding ASIC/FPGA power rails in AI accelerators. IC Role / Device Role / Timing Role: Mounted directly at VRM output; senses up to 48 V common-mode with 1.7 V logic supply; reports power in watts via I²C to BMC. Use Value: Enables per-rail dynamic power capping and predictive thermal management, reducing cooling fan energy use by 18% in data center deployments. |
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 | Same 16-bit resolution but 36-V max common-mode; 0.2% gain error; SOT-23-8 package only; no 1.2-V I²C support. | Limited to ≤36 V systems; lacks ultra-low-offset capability for sub-mA sensing; requires level-shifting for 1.2-V hosts. | Select when cost sensitivity outweighs 48 V headroom and 5 µV offset requirements; verify bus voltage compatibility. |
| INA238AIRSAT | Newer 16-bit device with 85-V common-mode, 0.05% gain error, and integrated EEPROM; 1.8-V min supply; WSON-10 package. | Supports higher-voltage EV chargers and industrial drives; adds nonvolatile configuration storage; larger footprint. | Choose for next-gen designs requiring extended voltage range, tighter accuracy, or persistent calibration settings. |
Compared with INA226AIDGSR and INA238AIRSAT, the INA236AIYBJR uniquely balances 48 V operation, 5 µV offset, 1.2-V I²C compatibility, and DSBGA-8 size - making it optimal for space-constrained, multi-supply portable electronics where precision and integration density are prioritized over extended voltage range or EEPROM storage.
Availability
INA236AIYBJR is available at Aetrix Electronics and suitable for mobile phones, smart speakers, wearables, battery chargers, and rack server power delivery networks requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for INA236AIYBJR 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 INA236AIYBJR belongs to TI's high-accuracy current-sense monitor product line, engineered specifically for real-time, multi-parameter power telemetry in battery-powered and high-efficiency power distribution systems.
FAQ
What is the maximum common-mode voltage supported by the INA236AIYBJR?
The INA236AIYBJR supports a common-mode input voltage range of –0.3 V to 48 V on the IN+ and IN– pins. This allows it to monitor current and voltage on high-side or low-side shunts in 48 V systems - such as PoE++ switches or e-bike battery packs - while operating from a separate 1.7–5.5 V supply. The specification is validated across –40°C to +125°C and is independent of the VS supply voltage.
Does the INA236AIYBJR support I²C communication at 1.2 V logic levels?
Yes, the INA236AIYBJR features a 1.2-V compliant I²C/SMBus interface, meaning its SCL and SDA pins recognize logic-high thresholds as low as 0.9 V and operate reliably with 1.2 V, 1.8 V, 3.3 V, and 5.0 V digital buses. No external level shifters are required, simplifying integration into ultra-low-voltage SoC platforms like those used in wearables and hearing aids.
How does the ALERT pin function in the INA236AIYBJR?
The ALERT pin on the INA236AIYBJR is a multifunctional open-drain output that can be configured via the Mask/Enable register to signal one of five conditions: shunt over/underlimit, bus over/underlimit, or power overlimit - or to indicate conversion readiness. It asserts when a programmed threshold is exceeded, enabling interrupt-driven firmware response without continuous register polling, thereby reducing MCU overhead in the INA236AIYBJR-based design.
What is the significance of the 5 µV maximum shunt offset voltage in the INA236AIYBJR?
The 5 µV maximum shunt offset voltage in the INA236AIYBJR enables accurate measurement of very small currents - down to tens of microamps - using standard shunt resistors. For example, with a 100 mΩ shunt, this offset corresponds to just 50 nA of equivalent input current error. This precision is critical in always-on wearable sensors and low-power IoT nodes where minimizing shunt resistor power loss is essential to battery longevity.
Can the INA236AIYBJR measure both current and bus voltage simultaneously?
The INA236AIYBJR does not perform true simultaneous sampling, but it sequentially measures shunt voltage (for current) and bus voltage (at IN–) with tightly controlled timing - typically within microseconds - and computes power using the latest current and bus voltage values. Its internal averaging and register architecture ensure coherent, time-aligned current/voltage/power data sets suitable for real-time power budgeting and fault detection in the INA236AIYBJR application.
INA236AIYBJR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-XFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High/Low-Side
- Accuracy:
- ±0.015%
- Voltage - Input:
- 0V ~ 48V
- Current - Output:
- 10mA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DSBGA (0.71x1.47)
INA236AIYBJR FAQ
1.How can I place an order for INA236AIYBJR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA236AIYBJR 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 INA236AIYBJR reliable?
The price and inventory of INA236AIYBJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA236AIYBJR is usually 5 days.
3.What payment methods are accepted for INA236AIYBJR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA236AIYBJR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA236AIYBJR?
INA236AIYBJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA236AIYBJR 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 INA236AIYBJR?
For technical support, including INA236AIYBJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA236AIYBJR requirements.
6.How does Aetrix verify that INA236AIYBJR is sourced from the original manufacturer or authorized distributors?
All INA236AIYBJR 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 INA236AIYBJR meets industry standards.
7.What is the process for return or replacement of INA236AIYBJR?
All INA236AIYBJR units undergo pre-shipment inspection (PSI). If there is an issue with INA236AIYBJR, 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 INA236AIYBJR part is unused and in its original packaging.
Return procedure for INA236AIYBJR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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