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Texas Instruments INA220BIDGST
- Part No.:
- INA220BIDGST
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA220BIDGST.pdf
- Description:
- IC CURRENT MONITOR 0.5% 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,163
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Product details
Overview
INA220BIDGST from Texas Instruments is a high-accuracy, bidirectional current and power monitor IC with I²C/SMBus interface, designed for high- or low-side shunt sensing in 0–26 V bus systems. It delivers 12-bit ADC resolution, ±0.3% current measurement error over temperature, programmable PGA (×1/2/4/8), and integrated power calculation. It is used in server power rail monitoring where precise real-time current, voltage, and wattage data inform thermal management and fault response.
For engineers reviewing the INA220BIDGST datasheet, INA220BIDGST pinout, INA220BIDGST application, or INA220BIDGST equivalent, key selection considerations include its 0.3% current accuracy over –40°C to +85°C, 10-μV shunt voltage LSB, 4-mV bus voltage LSB, 16 programmable I²C addresses, and VSSOP-10 package compatibility with space-constrained PCB layouts.
Technical Context
The INA220BIDGST implements a delta-sigma ADC architecture with independent averaging control for shunt and bus voltage channels-up to 128 samples per conversion-and supports triggered or continuous measurement modes. Its internal multiplier and calibration register enable direct current (amperes) and power (watts) readouts without host-side computation.
It features dual full-scale bus voltage ranges (16 V / 32 V), four PGA gain settings for shunt input (±40 mV to ±320 mV), and robust input tolerance: ±26 V differential across IN+/IN–, common-mode up to 26 V, and operation from 3 V to 5.5 V supply at ≤1 mA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Accuracy | ±0.3% max over –40°C to +85°C - enables reliable overcurrent detection without derating in telecom and server environments |
| Shunt Voltage LSB | 10 μV - resolves sub-mA currents with 100-mΩ shunt, supporting precision battery and load monitoring |
| Bus Voltage LSB | 4 mV - provides 12-bit resolution across 0–16 V or 0–32 V ranges, matching CPU core and 12-V rail sensing needs |
| I²C Clock Frequency | Up to 2.56 MHz - allows rapid polling of current/power registers in dynamic load scenarios (e.g., CPU burst mode) |
| Supply Range | 3 V to 5.5 V - interoperates with standard logic supplies and avoids need for auxiliary LDOs |
| Operating Temp | –40°C to +85°C - qualified for industrial and embedded computing applications without thermal derating |
| Input Common-Mode | 0 V to 26 V - supports direct high-side sensing on unregulated DC buses, including hot-swap controller interfaces |
Pinout & Package
VSSOP-10 (3.00 mm × 3.00 mm) package with exposed thermal pad; optimized for thermal performance in high-current density PCBs and compatible with standard 0.5-mm pitch reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | I²C address select input | Configures one of 16 device addresses when tied to GND, VS, SCL, or SDA - enables multi-device bus topology without address conflict |
| A0 | I²C address select input | Second address bit; combined with A1, sets unique I²C slave address - essential for stacking multiple INA220BIDGST on same bus |
| NC | No-connect | Internally unconnected pin - must be left floating or grounded; no routing or thermal tie required |
| SDA | Open-drain I²C data line | Bi-directional serial data interface with 3.3 V/5 V logic compatibility and SMBus timeout (28 ms) - supports standard microcontroller I²C peripherals |
| SCL | I²C clock input | Master-generated clock up to 2.56 MHz; includes hysteresis for noise immunity in electrically noisy power systems |
| VS | Analog power supply | 3–5.5 V supply input; powers internal analog circuitry and digital interface - decoupling with 0.1 µF ceramic capacitor required at pin |
| GND | Analog ground reference | Primary return path for shunt and bus voltage measurements - must be connected to clean system analog ground plane |
| VBUS | Bus voltage sense input | Measures 0–26 V single-ended relative to GND - enables direct connection to power rail without level-shifting |
| IN– | Negative shunt terminal | Connects to low-side of shunt resistor; common-mode voltage referenced to GND - supports low-side sensing topologies |
| IN+ | Positive shunt terminal | Connects to high-side of shunt resistor; differential input with ±26 V tolerance - enables high-side sensing with TI hot-swap controllers |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional current sensing | Measures charge/discharge current direction via signed 16-bit Current Register - critical for battery fuel gauging and regenerative braking monitoring |
| User-programmable calibration | Calibration register (05h) accepts integer value derived from shunt resistance and desired LSB - eliminates host-side scaling math and ensures consistent unit conversion |
| Integrated power calculation | Power Register (03h) outputs watts directly using internal multiplier (20 × Current_LSB) - removes need for MCU multiplication and reduces firmware overhead |
| Independent channel averaging | Configurable SADC/BADC bits set separate oversampling counts for shunt and bus voltage - optimizes noise rejection per signal without sacrificing update rate |
| Fast power-down recovery | 40 μs wake-up time from shutdown mode - enables duty-cycled monitoring to reduce average system power in always-on telemetry applications |
Applications
| Server Power Rail Monitoring | Telecom Rectifier Module |
|---|---|
Use Scenario: Real-time monitoring of 12-V and 48-V distribution rails in rack-mounted servers to detect overcurrent, track efficiency, and trigger graceful shutdown. IC Role / Device Role / Timing Role: High-side current and bus voltage sensor feeding telemetry to BMC via I²C; updates every 532 μs (12-bit mode). Use Value: Enables accurate power budgeting and thermal throttling decisions using native current (A), voltage (V), and power (W) registers - no host-side computation required. | Use Scenario: Current and voltage supervision in modular telecom rectifiers with hot-swap capability and redundant power feeds. IC Role / Device Role / Timing Role: Low-side shunt monitor interfacing with TPS2490 hot-swap controller; reports load current and output voltage to system supervisor MCU. Use Value: Supports compliance with GR-1089 immunity requirements by providing fast (<1 ms) overcurrent detection and logging - leveraging ±0.3% accuracy and 2.56-MHz I²C speed. |
| Notebook Battery Management | Industrial PLC Power Supply |
Use Scenario: Bidirectional current sensing across battery pack shunt to track charge/discharge cycles, state-of-charge, and health metrics in Windows/Linux laptops. IC Role / Device Role / Timing Role: Shunt-based coulomb counter with signed current output; communicates via SMBus-compatible interface to EC or embedded controller. Use Value: Delivers <1% total energy error over full temperature range using calibrated Current_LSB and integrated power register - improves battery runtime estimation accuracy. | Use Scenario: Input and output current monitoring in DIN-rail mounted 24-VDC power supplies for factory automation systems. IC Role / Device Role / Timing Role: Dual-role sensor: high-side input current monitor and low-side output current monitor - both referenced to common system ground. Use Value: Enables predictive maintenance via long-term current drift analysis and immediate fault isolation using independent shunt/bus conversion paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current and power monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA219AIDR | Zero-drift architecture; ±0.2% current accuracy; fixed 32-V bus range; no PGA; smaller MSOP-8 package | Optimized for low-power portable devices; lacks high-side sensing support and programmable bus voltage range | Select for cost-sensitive, space-constrained designs where 32-V-only bus sensing suffices and ultra-low offset drift is prioritized over flexibility |
| INA226AIDGSR | Higher 16-bit resolution; ±0.1% current accuracy; integrated temperature sensor; 1-MSPS sampling; same VSSOP-10 footprint | Targeted at precision test equipment and energy metering; requires more complex register initialization and higher firmware overhead | Select when sub-0.2% accuracy, temperature-compensated readings, or faster sampling (>1 kHz) are required - retains pin compatibility with INA220BIDGST |
Compared with INA219AIDR, the INA220BIDGST offers superior high-side sensing capability and flexible bus voltage scaling, while INA226AIDGSR extends resolution and accuracy at the cost of increased configuration complexity - all three share I²C/SMBus interface but differ in architectural trade-offs for specific system-level accuracy, layout, and firmware constraints.
Availability
INA220BIDGST is available at Aetrix Electronics and suitable for server power management, telecom rectifier modules, and notebook battery monitoring requiring stable component supply and long-term production continuity.
Supply support for INA220BIDGST 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 sensing and power management ICs.
The INA220 product line was developed specifically for high-accuracy, digitally interfaced current and power monitoring in enterprise and industrial power systems - emphasizing reliability, wide common-mode range, and seamless integration with existing I²C infrastructure.
FAQ
What is the maximum bus voltage the INA220BIDGST can measure?
The INA220BIDGST supports a maximum bus voltage of 26 V, with two programmable full-scale ranges: 16 V (BRNG = 0) and 32 V (BRNG = 1). The VBUS pin tolerates common-mode voltages from –0.3 V to 26 V, enabling safe operation in high-side sensing configurations where the shunt is placed between supply and load. This specification is confirmed in Section 7.1 (Absolute Maximum Ratings) and Section 7.5 (Electrical Characteristics) of the SBOS459E datasheet.
Does the INA220BIDGST support high-side current sensing?
Yes, the INA220BIDGST explicitly supports high-side current sensing via its differential IN+ and IN– inputs, which tolerate up to ±26 V differential voltage and common-mode voltages up to 26 V. Its architecture allows direct connection across a high-side shunt without level-shifting, and it is documented as compatible with TI hot-swap controllers like the TPS2490. This capability is detailed in the "Description" section and Figure 14 of the SBOS459E datasheet.
How does the PGA setting affect the shunt voltage measurement range of the INA220BIDGST?
The INA220BIDGST's programmable gain amplifier (PGA) offers four settings (/1, /2, /4, /8), extending the full-scale shunt voltage range from ±40 mV (PGA = /1) up to ±320 mV (PGA = /8). This allows optimization for different shunt resistances and current ranges - for example, a /2 setting enables 80-mV full-scale range to match the 50-mV limit of TI TPS2490 hot-swap controllers. These values are specified in Table 1 of Section 7.5 in SBOS459E.
What is the current measurement accuracy of the INA220BIDGST over temperature?
The INA220BIDGST (B-grade) guarantees ±0.3% current measurement error over the operating temperature range of –40°C to +85°C, as stated in Section 7.5 "Electrical Characteristics" of the SBOS459E datasheet. This is an improvement over the A-grade (±0.5%) and reflects tighter gain error and offset drift specifications validated across temperature - critical for applications requiring stable calibration without periodic recalibration.
Can the INA220BIDGST calculate power directly, or is external computation required?
The INA220BIDGST calculates power directly in watts using its internal multiplier and stores the result in the Power Register (address 03h). The Power LSB is fixed at 20 × Current_LSB, so no external MCU computation is needed to convert register contents to watts - only multiplication by the Power LSB value. This functionality is described in Section 8.3.1.1 ("Power Measurement") and Equation 3 of the SBOS459E datasheet.
INA220BIDGST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High/Low-Side
- Accuracy:
- ±0.5%
- Voltage - Input:
- 0V ~ 26V
- Current - Output:
- 10mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
INA220BIDGST FAQ
1.How can I place an order for INA220BIDGST through Aetrix?
Please submit a Request for Quotation (RFQ) for INA220BIDGST 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 INA220BIDGST reliable?
The price and inventory of INA220BIDGST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA220BIDGST is usually 5 days.
3.What payment methods are accepted for INA220BIDGST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA220BIDGST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA220BIDGST?
INA220BIDGST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA220BIDGST 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 INA220BIDGST?
For technical support, including INA220BIDGST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA220BIDGST requirements.
6.How does Aetrix verify that INA220BIDGST is sourced from the original manufacturer or authorized distributors?
All INA220BIDGST 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 INA220BIDGST meets industry standards.
7.What is the process for return or replacement of INA220BIDGST?
All INA220BIDGST units undergo pre-shipment inspection (PSI). If there is an issue with INA220BIDGST, 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 INA220BIDGST part is unused and in its original packaging.
Return procedure for INA220BIDGST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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