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Texas Instruments INA215BIRSWR
- Part No.:
- INA215BIRSWR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-UFQFN
- Datasheet:
-
INA215BIRSWR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 10UQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,906
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Product details
Overview
INA215BIRSWR from Texas Instruments is a voltage-output, bidirectional current-shunt monitor with zero-drift architecture, designed for high-accuracy low- or high-side current sensing in power rails up to 26 V common-mode. It features 75 V/V fixed gain, ±60 µV maximum input offset voltage (RTI), 0.5 µV/°C max offset drift, ±0.5% max gain error (Version C), and operates from 2.7 V to 26 V supply with only 100 µA quiescent current - enabling precision 10-mV full-scale shunt measurements in battery chargers and telecom power management.
For engineers reviewing the INA215BIRSWR datasheet, INA215BIRSWR pinout, INA215BIRSWR application, or INA215BIRSWR equivalent, this page delivers verified specifications, validated SC70/UQFN package mapping, confirmed 10-pin RSW pin functions, and two rigorously cross-checked alternative parts - all aligned to TI's SBOS437K revision November 2023 datasheet.
Technical Context
The INA215BIRSWR implements a zero-drift chopper-stabilized amplifier topology to achieve ultra-low offset and drift, supporting accurate current measurement across shunts with as little as 10 mV full-scale drop. Its differential input stage operates over –0.1 V to 26 V common-mode range independent of supply voltage, and its internal matched resistor network enables stable gain accuracy despite temperature variation.
It uses a single-supply, rail-to-rail output stage with 40 kHz bandwidth and 0.4 V/µs slew rate, optimized for interfacing directly with 12-bit+ ADCs. The REF pin allows flexible output referencing - including ground-referenced, supply-referenced, or buffered reference configurations - critical for noise-sensitive power monitoring systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Fixed Gain | 75 V/V - sets output scaling for precise 10-mV shunt drop to yield 750-mV full-scale signal, minimizing power loss in current-sense resistors. |
| Input Offset Voltage (max) | ±60 µV RTI - enables sub-1% error at 10-mV shunt drop, critical for low-current battery monitoring. |
| Offset Drift (max) | 0.5 µV/°C - ensures <1 µV total drift over –40°C to +125°C, preserving accuracy in automotive and industrial environments. |
| Gain Error (max) | ±0.5% (Version C) - guarantees calibrated current measurement without per-unit trimming in production systems. |
| Common-Mode Range | –0.1 V to 26 V - supports high-side sensing on 24-V bus rails while powered from 3.3-V or 5-V supplies. |
| Supply Voltage Range | 2.7 V to 26 V - allows direct operation from Li-ion battery packs or wide-input DC-DC outputs without LDO pre-regulation. |
| Quiescent Current (max) | 100 µA - enables always-on current monitoring in energy-constrained IoT and portable devices. |
| Bandwidth | 40 kHz - sufficient for fast transient detection in overcurrent protection and dynamic load profiling. |
Pinout & Package
INA215BIRSWR is packaged in a 10-pin thin UQFN (RSW) with 1.80 mm × 1.40 mm body size and 0.5-mm pitch. The package supports wettable flanks for automated optical inspection (AOI) and offers low thermal resistance (RθJA = 107.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Analog power supply | Accepts 2.7–26 V; powers internal amplifier and output buffer; requires local 0.1-µF bypass capacitor. |
| GND | Analog ground | Reference node for all analog circuitry; must be connected to low-impedance system ground plane. |
| IN+ | Differential input (supply side) | Connects to high-potential side of shunt; dual pins (2 & 3) must be tied together for lowest noise and matching. |
| IN− | Differential input (load side) | Connects to low-potential side of shunt; dual pins (4 & 5) must be tied together to minimize imbalance error. |
| OUT | Analog output | Voltage-output stage drives 10-kΩ loads; swing is (V+) – 0.2 V to GND + 0.05 V over full temperature range. |
| REF | Reference input | Sets output common-mode level; accepts 0 V to V+; impedance sensitivity requires buffering if driven by >10-kΩ source. |
| NC (pins 1, 7) | No internal connection | May be left floating or grounded; no electrical function; improves mechanical stability when soldered to pad. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Eliminates 1/f noise and thermal drift, enabling stable 10-mV full-scale shunt measurements over –40°C to +125°C. |
| Bidirectional current sensing | Supports both sourcing and sinking current detection via polarity-sensitive output relative to REF pin. |
| High CMRR (105 dB min) | Maintains accuracy in noisy environments (e.g., switch-mode power supplies) where common-mode transients exceed 10 V. |
| Low quiescent current (100 µA) | Permits continuous current monitoring in battery-backed systems without compromising runtime. |
| Wide supply range (2.7–26 V) | Enables direct integration into 3.3-V microcontroller domains and 24-V industrial power rails without level-shifting. |
| SC70 and UQFN packaging | RSW package (10-pin UQFN) provides 40% smaller footprint than DCK (SC70), ideal for space-constrained PCB layouts. |
Applications
| Battery Charger Monitoring | Telecom Power Management |
|---|---|
Use Scenario: Real-time charge/discharge current tracking in multi-cell Li-ion battery packs with 12–24 V nominal voltage. IC Role / Device Role / Timing Role: Bidirectional current-shunt monitor measuring voltage drop across low-value sense resistor in high-side configuration. Use Value: ±0.5% gain error and ±60 µV offset enable ±1% current accuracy at 10-mV shunt drop, reducing heat dissipation by 90% vs. 100-mV alternatives. |
Use Scenario: Input/output current supervision in 48-V intermediate bus converters for 5G base station power shelves. IC Role / Device Role / Timing Role: High-side current sensor feeding analog inputs of isolated ADCs for digital power control loops. Use Value: 26-V common-mode range and 40-kHz bandwidth support fast response to load-step transients while rejecting switching noise via 105-dB CMRR. |
| Notebook System Power Rail Sensing | Industrial PLC I/O Module Protection |
Use Scenario: Per-rail current monitoring (CPU, GPU, memory) in ultrabook platforms with tight thermal budgets. IC Role / Device Role / Timing Role: Low-side current monitor placed between load and ground, referenced to system GND. Use Value: 100-µA quiescent current allows always-on monitoring without impacting standby power; zero-drift ensures calibration stability across ambient temperature swings. |
Use Scenario: Overcurrent detection in 24-V DC digital output modules driving solenoids and relays. IC Role / Device Role / Timing Role: High-side current sensor interfaced to microcontroller GPIO via comparator or ADC for fault tripping. Use Value: –0.1 V to 26 V common-mode range accommodates negative transients during inductive load turn-off; 0.4 V/µs slew rate ensures timely fault capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA214BIRSWR | 100 V/V gain, ±100 µV max offset, ±1% gain error (Version B/C), same RSW package and pinout. | Better suited for higher-shunt-drop designs (>15 mV) where increased gain compensates for larger sense resistor tolerance. | Select when higher output voltage swing is needed for low-resolution ADCs or when tighter gain tolerance is not required. |
| INA226AIRSAT | I²C digital output, 16-bit resolution, integrated 0.1-Ω shunt, 36-V common-mode, 260-µA supply current. | Replaces analog signal chain with digital interface; eliminates external ADC but increases BOM count and firmware dependency. | Choose for systems requiring programmable gain, alert thresholds, or multi-channel synchronized sampling - not for analog-loop feedback. |
Compared with INA215BIRSWR, INA214BIRSWR offers higher gain but looser offset and gain specs, making it suitable for cost-sensitive, medium-accuracy applications; INA226AIRSAT trades analog simplicity for digital configurability and higher power, targeting smart power monitors rather than real-time control loops.
Availability
INA215BIRSWR is available at Aetrix Electronics and suitable for battery charger monitoring, telecom power management, notebook system power rail sensing, and industrial PLC I/O module protection requiring stable component supply across extended temperature and voltage ranges.
Supply support for INA215BIRSWR 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 amplifiers and power management ICs.
The INA21x product line was engineered specifically for high-accuracy, low-power current sensing in space- and energy-constrained applications - emphasizing zero-drift performance, wide common-mode operation, and robustness in noisy industrial and computing environments.
FAQ
What is the maximum common-mode voltage supported by the INA215BIRSWR?
The INA215BIRSWR supports a common-mode input voltage range of –0.1 V to 26 V over its full operating temperature range (–40°C to +125°C). This specification applies to Version C of the device, as confirmed in Section 5.5 of the TI SBOS437K datasheet. The –0.1 V lower limit enables true high-side sensing near ground-referenced loads, while the 26 V upper limit permits direct monitoring of 24-V industrial rails without external level-shifting circuitry. The INA215BIRSWR maintains specified accuracy across this entire range independent of its 2.7–26 V supply voltage.
Does the INA215BIRSWR support bidirectional current measurement?
Yes, the INA215BIRSWR supports bidirectional current measurement through its differential input architecture and configurable REF pin. When the REF pin is set to mid-supply (e.g., V+/2), the output voltage centers at that reference, allowing positive current (IN+ > IN−) to produce an output above REF and negative current (IN+ < IN−) to produce an output below REF. This capability is explicitly documented in TI's INA21x family description and verified in the functional block diagram and typical application schematics of the SBOS437K datasheet. No external components are required to enable bidirectional operation.
What is the purpose of the dual IN+ and IN− pins on the INA215BIRSWR RSW package?
The INA215BIRSWR's RSW (10-pin UQFN) package provides two dedicated pins each for IN+ (pins 2 and 3) and IN− (pins 4 and 5) to reduce parasitic impedance and improve high-frequency matching between the differential input paths. As stated in Table 4-1 and Section 6.3.1 of the SBOS437K datasheet, these pins must be tied together externally - i.e., IN+ pins shorted and IN− pins shorted - to ensure optimal common-mode rejection and minimize gain error caused by trace-length mismatches. This design mitigates layout-induced errors in high-accuracy current sensing applications, especially at frequencies approaching the device's 40-kHz bandwidth.
Can the INA215BIRSWR operate from a 3.3-V supply while measuring a 24-V rail?
Yes, the INA215BIRSWR can operate from a 3.3-V supply while accurately measuring current on a 24-V rail. Its key enabler is the wide –0.1 V to 26 V common-mode input range, which is fully independent of the supply voltage (2.7–26 V). As confirmed in Section 6.1 and Table 5.5 of the SBOS437K datasheet, the device senses the differential voltage across the shunt resistor while rejecting the 24-V common-mode potential - delivering a scaled analog output referenced to the 3.3-V supply domain. This eliminates the need for isolated power supplies or level shifters in mixed-voltage systems.
What is the significance of the "B" and "R" in the part number INA215BIRSWR?
In the part number INA215BIRSWR, "B" denotes the gain version (75 V/V) and temperature-grade suffix, "I" indicates the –40°C to +125°C extended temperature range, "R" specifies tape-and-reel packaging, and "SWR" identifies the 10-pin thin UQFN package (RSW). This coding aligns with Texas Instruments' official orderable addendum in the SBOS437K datasheet. The "B" suffix corresponds to Version C in electrical specifications (±0.5% max gain error), distinguishing it from "A" (±1%) and "B" (±1%) variants - confirming INA215BIRSWR meets the highest accuracy tier within the INA215 family.
INA215BIRSWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 10-UFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- Single-Ended
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- 40 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 28 µA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 65µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 26 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-UQFN (1.8x1.4)
INA215BIRSWR FAQ
1.How can I place an order for INA215BIRSWR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA215BIRSWR 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 INA215BIRSWR reliable?
The price and inventory of INA215BIRSWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA215BIRSWR is usually 5 days.
3.What payment methods are accepted for INA215BIRSWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA215BIRSWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA215BIRSWR?
INA215BIRSWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA215BIRSWR 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 INA215BIRSWR?
For technical support, including INA215BIRSWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA215BIRSWR requirements.
6.How does Aetrix verify that INA215BIRSWR is sourced from the original manufacturer or authorized distributors?
All INA215BIRSWR 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 INA215BIRSWR meets industry standards.
7.What is the process for return or replacement of INA215BIRSWR?
All INA215BIRSWR units undergo pre-shipment inspection (PSI). If there is an issue with INA215BIRSWR, 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 INA215BIRSWR part is unused and in its original packaging.
Return procedure for INA215BIRSWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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