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Texas Instruments INA236BIYBJR
- Part No.:
- INA236BIYBJR
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 8-XFBGA, DSBGA
- Datasheet:
-
INA236BIYBJR.pdf
- Description:
- 48-V, 16-BIT ULTRAPRECISE IC OUT
- Quantity:
- Payment:
- Shipping:
Inventory:3,218
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Product details
Overview
INA236BIYBJR from Texas Instruments is a 16-bit ultra-precise digital current, voltage, and power monitor IC for high-side or low-side shunt sensing in systems with bus voltages up to 48 V. It features 0.1% max gain error, 5 µV max shunt offset, 1.7–5.5 V supply operation, and I²C/SMBus interface compliant down to 1.2 V. It is used in battery-powered portable electronics for real-time power telemetry and fault detection.
For engineers reviewing the INA236BIYBJR datasheet, INA236BIYBJR pinout, INA236BIYBJR application, or INA236BIYBJR equivalent, key selection considerations include its ±0.3 V to 48 V common-mode input range, programmable 20 mV/80 mV full-scale shunt range, 16-bit delta-sigma ADC architecture, dual alert limit configuration (shunt/bus/power), and DSBGA-8 (YBJ) package footprint compatibility with space-constrained wearables and mobile power rails.
Technical Context
The INA236BIYBJR integrates a multiplexed 16-bit delta-sigma ADC that sequentially samples shunt voltage (IN+ to IN−) and bus voltage (IN− to GND), enabling simultaneous current and voltage reporting. Its internal calibration register supports direct readout of current in amperes and power in watts without host-side computation.
It operates in continuous or triggered mode with configurable conversion times (133 µs to 8.66 ms) and averaging (1–1024 samples). The ALERT pin functions as an open-drain output for over/under-current, over/under-voltage, or power-overlimit events - each independently programmable via the Mask/Enable register (06h) and Alert Limit register.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 16-bit delta-sigma; enables 625 nV LSB step size at 20-mV full-scale range for sub-mA current resolution. |
| Shunt Gain Error | ±0.1% max; ensures ≤1 mA absolute error when measuring 1 A across 10 mΩ shunt at room temperature. |
| Common-Mode Range | –0.3 V to +48 V; supports monitoring of 12 V, 24 V, and 48 V rails independent of 1.7–5.5 V supply voltage. |
| Supply Voltage | 1.7 V to 5.5 V; allows direct interfacing with 1.8 V, 3.3 V, and 5 V logic domains without level shifters. |
| I²C Interface | 1.2 V–5.5 V tolerant; compatible with fast-mode (400 kHz) and high-speed mode (up to 2.94 MHz) timing. |
| Quiescent Current | 300 µA typical in active mode; drops to 2.2 µA in standby - critical for battery runtime in wearables. |
| Input Bias Current | ≤10 nA max during current measurement; permits use of high-value shunts (e.g., 100 mΩ) for µA-level current sensing. |
Pinout & Package
INA236BIYBJR uses the YBJ package: 8-bump DSBGA with 0.745 mm × 1.508 mm body size and 0.4 mm pitch. This ultra-compact wafer-level chip-scale package is optimized for PCB area-constrained applications such as smartphones and hearables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Analog input | Positive shunt terminal; connects to bus side (high-side) or load side (low-side) of sense resistor. |
| IN− | Analog input | Negative shunt terminal and bus voltage reference; defines common-mode point for both measurements. |
| VS | Power supply | 1.7–5.5 V analog/digital supply; powers internal ADC, logic, and I²C interface. |
| GND | Ground | Single shared analog/digital ground reference; requires low-impedance connection to minimize noise coupling. |
| SCL | Digital input | Open-drain I²C clock line; accepts 1.2–5.5 V logic levels with internal pull-up capability. |
| SDA | Digital I/O | Open-drain I²C data line; bidirectional communication path for register reads/writes and alert status polling. |
| A0 | Digital input | Address select pin; sets I²C address to either 0x40 or 0x41 depending on connection to GND, VS, SCL, or SDA. |
| ALERT | Digital output | Open-drain interrupt output; asserts on programmed over/under conditions or conversion-ready signal. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Shunt Full-Scale Range | 20 mV or 80 mV selection enables optimal SNR for either low-current (e.g., sleep-state battery drain) or high-current (e.g., charging) monitoring. |
| Configurable Averaging | 1–1024 sample averaging reduces noise-induced errors in noisy industrial or RF-dense environments without external filtering. |
| Direct Power Calculation | On-chip multiplication of current and bus voltage yields real-time power (watts) in dedicated register - eliminates host MCU computational load. |
| General Call Addressing | Allows synchronized conversions across multiple INA236BIYBJR devices on same I²C bus - essential for multi-rail server power sequencing. |
| Low Input Bias Current | ≤10 nA enables accurate measurement with high-resistance shunts (≥100 mΩ), minimizing self-heating and improving µA-range accuracy. |
Applications
| Mobile Phone Power Management | Smart Speaker Battery Monitoring |
|---|---|
Use Scenario: Real-time tracking of battery discharge current, system rail voltage, and instantaneous power during voice assistant wake-up and audio playback. IC Role / Device Role / Timing Role: Current/voltage/power monitor IC providing 16-bit telemetry to application processor via I²C at 100 Hz update rate. Use Value: Enables adaptive power budgeting and thermal throttling using calibrated current readings with ≤0.1% gain error and 5 µV offset stability. | Use Scenario: Continuous monitoring of Li-ion battery pack voltage, charge/discharge current, and power consumption during streaming and standby modes. IC Role / Device Role / Timing Role: Ultra-low-quiescent (2.2 µA standby) power monitor IC triggering ALERT on overvoltage or undervoltage thresholds during charging cycles. Use Value: Extends battery life by enabling precise state-of-charge estimation and preventing over-discharge through sub-10 nA bias current accuracy. |
| Wearable Health Sensor Node | Rack Server 48-V Intermediate Bus Monitor |
Use Scenario: Measuring microampere-level sensor bias currents and µA–mA dynamic loads in ECG/PPG modules powered from coin-cell batteries. IC Role / Device Role / Timing Role: High-impedance current sense amplifier with 10 nA max input bias, supporting 100 mΩ shunt for 1 µA resolution. Use Value: Delivers stable sub-µA current measurement accuracy across –40°C to +125°C, enabling reliable long-term physiological data logging. | Use Scenario: Monitoring per-rail current, voltage, and power on 48-V intermediate distribution buses feeding multiple server compute modules. IC Role / Device Role / Timing Role: 48-V common-mode capable digital power monitor with general-call synchronization for time-aligned measurements across 12+ rails. Use Value: Provides traceable power telemetry with ±0.3 V to 48 V input range and 0.1% gain error - critical for rack-level energy accounting and fault isolation. |
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 |
|---|---|---|---|
| INA226AIRSAT | Same 16-bit architecture but SOT-23-8 package; 0.2% gain error (vs. 0.1%); no 1.2-V I²C compliance. | Larger footprint; higher quiescent current (330 µA vs. 300 µA); limited to ≥1.8-V I²C hosts. | Select when board layout accommodates SOT-23 and 1.2-V I²C is not required. |
| INA238BIYFJR | Successor device with 0.05% gain error, 2.5 µV offset, and extended 85-V common-mode range; identical YBJ package and pinout. | Higher precision and voltage rating; backward-compatible register map; supports next-gen 54-V telecom and EV auxiliary systems. | Select for new designs requiring tighter accuracy or >48-V bus support; drop-in replacement for most INA236BIYBJR use cases. |
Compared with INA236BIYBJR, INA226AIRSAT trades precision and I²C voltage flexibility for larger package and simpler qualification, while INA238BIYFJR delivers measurable improvements in offset, gain error, and common-mode range within the same DSBGA-8 footprint - making it the preferred upgrade path for high-reliability 48-V applications.
Availability
INA236BIYBJR is available at Aetrix Electronics and suitable for mobile phones, smart speakers, wearables, battery chargers, and rack servers requiring stable component supply and long-term production continuity.
Supply support for INA236BIYBJR 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 company specializing in analog and embedded processing technologies, with leadership in precision signal chain and power management solutions.
The INA236BIYBJR belongs to TI's high-accuracy current-sense monitor product line, designed specifically for real-time, multi-parameter power telemetry in battery-constrained and high-voltage industrial systems.
FAQ
What is the maximum common-mode voltage supported by the INA236BIYBJR?
The INA236BIYBJR supports a common-mode input voltage range of –0.3 V to +48 V on the IN+ and IN− pins. This specification is independent of the 1.7–5.5 V supply voltage, enabling accurate current sensing on 12 V, 24 V, and 48 V rails even when the device is powered from a lower-voltage domain. The value is confirmed in Section 6.3 (Recommended Operating Conditions) of the SBOSA81D datasheet.
Does the INA236BIYBJR support I²C communication at 1.2 V logic levels?
Yes, the INA236BIYBJR features a 1.2-V–compliant I²C/SMBus interface, meaning its SCL and SDA pins accept 1.2 V as a valid high logic level. This allows direct interfacing with ultra-low-voltage microcontrollers and SoCs without level-shifting circuitry. The specification is explicitly stated in the "Features" section and verified in Section 6.5 Electrical Characteristics under Digital Input/Output parameters.
How does the ALERT pin function on the INA236BIYBJR?
The ALERT pin on the INA236BIYBJR is an open-drain output that can be configured to signal one of five events: shunt over/under-limit, bus over/under-limit, or power over-limit. It may also indicate conversion-ready status. Configuration is done via the Mask/Enable register (06h), and threshold values are set in the Alert Limit register. The pin remains asserted until the source is cleared by reading the register or writing to Configuration - as detailed in Section 7.3.5 of the SBOSA81D datasheet.
What is the smallest current the INA236BIYBJR can accurately measure?
The smallest measurable current depends on shunt resistance and full-scale range. With the 20-mV range and 5 µV max offset, a 100 mΩ shunt yields ~50 µA minimum resolvable current (5 µV / 100 mΩ). Combined with ≤10 nA input bias current, the INA236BIYBJR supports reliable sub-100 µA measurements - validated in Figure 6-14 (Input Bias Current vs Differential Voltage) and Section 6.5 Electrical Characteristics.
Is the INA236BIYBJR pin-compatible with other members of the INA23x family?
The INA236BIYBJR in the YBJ (DSBGA-8) package shares identical pinout with the INA238BIYFJR, including IN+, IN−, VS, GND, SCL, SDA, A0, and ALERT. However, it is not pin-compatible with SOT-23-8 variants like the INA226AIRSAT due to different pad layouts and thermal pad presence. Pin compatibility is confirmed in Figures 5-1 and 5-2 of the SBOSA81D datasheet.
INA236BIYBJR 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:
- 1.7V ~ 5.5V
- Current - Output:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DSBGA (0.71x1.47)
INA236BIYBJR FAQ
1.How can I place an order for INA236BIYBJR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA236BIYBJR 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 INA236BIYBJR reliable?
The price and inventory of INA236BIYBJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA236BIYBJR is usually 5 days.
3.What payment methods are accepted for INA236BIYBJR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA236BIYBJR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA236BIYBJR?
INA236BIYBJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA236BIYBJR 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 INA236BIYBJR?
For technical support, including INA236BIYBJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA236BIYBJR requirements.
6.How does Aetrix verify that INA236BIYBJR is sourced from the original manufacturer or authorized distributors?
All INA236BIYBJR 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 INA236BIYBJR meets industry standards.
7.What is the process for return or replacement of INA236BIYBJR?
All INA236BIYBJR units undergo pre-shipment inspection (PSI). If there is an issue with INA236BIYBJR, 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 INA236BIYBJR part is unused and in its original packaging.
Return procedure for INA236BIYBJR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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