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Texas Instruments INA220AIDGSR
- Part No.:
- INA220AIDGSR
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA220AIDGSR.pdf
- Description:
- IC CURRENT MONITOR 1% 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:13,571
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Product details
Overview
INA220AIDGSR from Texas Instruments is a bidirectional, high- or low-side current and power monitor IC with I²C/SMBus interface, 12-bit ADC resolution, ±40 mV shunt voltage range (PGA = /1), 0–26 V bus voltage sensing, and ±0.5% current measurement error over temperature. It enables real-time power management in server VRMs and telecom DC/DC modules.
For engineers reviewing the INA220AIDGSR datasheet, INA220AIDGSR pinout, INA220AIDGSR application, or INA220AIDGSR equivalent, key selection criteria include its dual-range bus voltage input (16 V / 32 V), programmable 16 I²C addresses, 532 µs 12-bit conversion time, and VSSOP-10 package compatibility with space-constrained PCB layouts.
Technical Context
The INA220AIDGSR integrates a delta-sigma ADC with independent shunt and bus voltage sampling paths, supporting configurable averaging (1–128 samples) per channel. Its internal multiplier and calibration register enable direct current (amperes) and power (watts) readouts without host-side computation.
It operates from –40°C to +85°C ambient, draws ≤1 mA quiescent current at 3.3 V, and tolerates up to 26 V common-mode input on IN+/IN– while maintaining 100 dB CMRR. The device supports both continuous and triggered conversion modes via its Configuration Register.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Shunt Voltage Range | ±40 mV (PGA = /1): sets minimum detectable current based on shunt resistor value |
| Bus Voltage Range | 0–32 V (BRNG = 1): supports monitoring of 24 V industrial rails and 32 V PoE++ inputs |
| ADC Resolution | 12-bit: provides 10 µV LSB for shunt voltage, enabling sub-mA current resolution with 10 mΩ shunt |
| Current Accuracy | ±0.5% max over temperature: ensures stable calibration across thermal cycling in server power supplies |
| I²C Interface Speed | Up to 2.56 MHz: allows rapid polling of current/power registers without bus contention in multi-device systems |
| Supply Voltage | 3.0–5.5 V: compatible with standard 3.3 V and 5 V logic domains without level-shifting |
| Operating Temperature | –40°C to +85°C: qualified for industrial and telecom equipment environments |
Pinout & Package
VSSOP-10 package (3.00 mm × 3.00 mm), thermally enhanced for surface-mount assembly in high-density power modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Address Input | Configures I²C slave address bit A1; tied to GND/VS/SCL/SDA for 16 unique addresses |
| A0 | Address Input | Configures I²C slave address bit A0; used with A1 for full 16-address mapping |
| NC | No Connect | Internally unconnected; must be left floating or grounded per layout guidelines |
| SDA | I²C Data Line | Open-drain bidirectional interface; requires external pull-up to VS (3.3 V or 5 V) |
| SCL | I²C Clock Line | Input-only clock line; supports Fast Mode (400 kHz) and High-Speed Mode (2.56 MHz) |
| VS | Supply Input | Powers analog and digital circuitry; decoupling capacitor (0.1 µF) required at pin |
| GND | Analog Ground | Reference for all analog measurements; must be connected to system power ground plane |
| VBUS | Bus Voltage Input | Measures system rail voltage (0–32 V); high-impedance (320 kΩ) input minimizes loading |
| IN– | Shunt Negative | Connects to low side of shunt; differential input with IN+ senses current direction and magnitude |
| IN+ | Shunt Positive | Connects to high side of shunt; supports both high-side and low-side sensing topologies |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Current Sensing | Detects forward/reverse current flow using differential IN+/IN– inputs, enabling battery charge/discharge monitoring |
| User-Programmable Calibration | Calibration register (05h) allows precise scaling to match actual shunt resistance and desired current LSB |
| Independent Shunt & Bus Averaging | Configurable SADC/BADC bits enable separate oversampling (1–128x) for noise reduction in each measurement path |
| Power Calculation Engine | Hardware multiplier computes watts (I × V) in real time; Power Register (03h) outputs result directly in watts |
| High Common-Mode Rejection | 100 dB CMRR maintains accuracy when sensing small shunt voltages on noisy 24 V or 48 V buses |
Applications
| Server VRM Monitoring | Telecom DC/DC Module |
|---|---|
Use Scenario: Real-time current and power tracking of CPU/GPU VRMs in 1U rack servers under dynamic load. IC Role / Device Role / Timing Role: High-side shunt monitor providing 12-bit current/voltage data via I²C to BMC for thermal throttling decisions. Use Value: Enables accurate power budgeting and fault detection within ±0.5% error across –40°C to +85°C ambient. | Use Scenario: Monitoring output current and voltage of 48 V to 12 V isolated DC/DC converters in base station power shelves. IC Role / Device Role / Timing Role: Low-side shunt sensor feeding real-time telemetry to system controller over shared SMBus bus. Use Value: Supports 2.56 MHz I²C polling for fast response to overcurrent events without sacrificing bus bandwidth. |
| Notebook Battery Management | Industrial PLC Power Rail |
Use Scenario: Bidirectional current sensing across battery protection FETs during charge/discharge cycles in ultrabooks. IC Role / Device Role / Timing Role: Dual-range bus voltage input (0–16 V / 0–32 V) accommodates Li-ion pack voltages up to 16.8 V. Use Value: Programmable PGA (/1–/8) extends dynamic range to resolve microamp standby currents and multi-amp charging peaks. | Use Scenario: Monitoring 24 V control rail current in programmable logic controllers to detect solenoid short circuits. IC Role / Device Role / Timing Role: High-CMRR analog front-end rejects noise from nearby motor drives and relay coils. Use Value: 100 dB CMRR ensures stable ±40 mV shunt measurements despite 2 kV/m EMI fields in factory environments. |
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, 16-bit ADC, integrated 0.1 Ω shunt, but only 26 V max bus voltage and no PGA | Better for low-current precision (<100 mA) in portable devices; lacks high-voltage bus support | Select INA220AIDGSR when monitoring >26 V rails or requiring programmable gain for wide dynamic range |
| INA226AIDGST | Higher accuracy (±0.2% current error), 16-bit ADC, same VSSOP-10 package, but 3.3 V supply only | Preferred for test equipment requiring lab-grade repeatability; not suitable for 5 V systems | Choose INA220AIDGSR for 3–5.5 V flexibility and industrial temperature range compliance |
Compared with INA219AIDR and INA226AIDGST, the INA220AIDGSR offers broader bus voltage range (0–32 V), wider supply tolerance (3–5.5 V), and PGA flexibility-making it optimal for industrial and telecom power systems where voltage headroom and design margin are critical.
Availability
INA220AIDGSR is available at Aetrix Electronics and suitable for server VRMs, telecom DC/DC modules, notebook battery management, and industrial PLC power rails requiring stable component supply and long-term production continuity.
Supply support for INA220AIDGSR 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 analog signal chains and power management ICs.
The INA220 product line delivers high-accuracy, digitally interfaced current and power monitoring for demanding power system applications-including data center infrastructure, communications equipment, and industrial automation-where reliability and measurement fidelity are essential.
FAQ
What is the maximum bus voltage the INA220AIDGSR can measure?
The INA220AIDGSR supports two bus voltage ranges: 0–16 V (BRNG = 0) and 0–32 V (BRNG = 1). Its absolute maximum rating allows 26 V common-mode input on the VBUS pin, making it suitable for 24 V industrial rails and 32 V PoE++ systems. The INA220AIDGSR's internal scaling ensures accurate digitization across the full selected range without external dividers.
Does the INA220AIDGSR support both high-side and low-side current sensing?
Yes, the INA220AIDGSR supports both configurations. Its separate IN+ and IN– differential inputs and dedicated VBUS pin allow flexible placement: IN+/IN– across a shunt on either side of the load, while VBUS monitors the rail independently. This enables accurate high-side sensing for ground-referenced loads and low-side sensing for simplified layout-both implemented with the same INA220AIDGSR device.
How does the PGA setting affect the INA220AIDGSR's current measurement range?
The INA220AIDGSR's programmable gain amplifier (PGA) scales the shunt voltage input before ADC conversion. With PGA = /1, full-scale range is ±40 mV; /2 gives ±80 mV; /4 gives ±160 mV; and /8 gives ±320 mV. This allows matching the shunt resistor value to expected current-e.g., a 10 mΩ shunt yields 4 A full-scale at /1, or 32 A at /8-without changing hardware. The INA220AIDGSR retains 12-bit resolution across all PGA settings.
What is the conversion time for the INA220AIDGSR at 12-bit resolution?
At 12-bit resolution, the INA220AIDGSR completes a single shunt voltage conversion in 532 µs (typical) and a bus voltage conversion in the same timeframe. When configured for continuous mode with averaging, total cycle time depends on selected SADC and BADC values-for example, 128-sample averaging extends effective conversion time but improves noise rejection. The INA220AIDGSR reports completion via the CNVR bit in the Status register.
Can the INA220AIDGSR be used with a 5 V supply while monitoring a 24 V bus?
Yes. The INA220AIDGSR operates from 3.0 V to 5.5 V on its VS pin and independently accepts 0–26 V on its VBUS and IN+/IN– pins. This galvanic separation allows safe 5 V logic interfacing while measuring 24 V power rails-no level shifters or isolation required. The INA220AIDGSR's input structure ensures that bus voltage transients do not couple into the digital supply domain.
INA220AIDGSR 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:
- ±1%
- Voltage - Input:
- 0V ~ 26V
- Current - Output:
- 10mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
INA220AIDGSR FAQ
1.How can I place an order for INA220AIDGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA220AIDGSR 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 INA220AIDGSR reliable?
The price and inventory of INA220AIDGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA220AIDGSR is usually 5 days.
3.What payment methods are accepted for INA220AIDGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA220AIDGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA220AIDGSR?
INA220AIDGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA220AIDGSR 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 INA220AIDGSR?
For technical support, including INA220AIDGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA220AIDGSR requirements.
6.How does Aetrix verify that INA220AIDGSR is sourced from the original manufacturer or authorized distributors?
All INA220AIDGSR 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 INA220AIDGSR meets industry standards.
7.What is the process for return or replacement of INA220AIDGSR?
All INA220AIDGSR units undergo pre-shipment inspection (PSI). If there is an issue with INA220AIDGSR, 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 INA220AIDGSR part is unused and in its original packaging.
Return procedure for INA220AIDGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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