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Texas Instruments INA214BIDCKR
- Part No.:
- INA214BIDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA214BIDCKR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:6,047
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Product details
Overview
INA214BIDCKR 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 management systems. It features 100 V/V fixed gain, ±60 µV maximum input offset voltage (RTI), 0.5 µV/°C max offset drift, 10 ppm/°C max gain drift, and operates from 2.7 V to 26 V supply across –40°C to +125°C. It enables precise measurement of shunt voltage drops as low as 10 mV full-scale in battery chargers and telecom equipment.
For engineers reviewing the INA214BIDCKR datasheet, INA214BIDCKR pinout, INA214BIDCKR application, or INA214BIDCKR equivalent, this page delivers verified specifications, SC70-6 package layout, real-world use cases in power rail monitoring, and two validated alternative parts with documented functional and application-level differences - all grounded in TI's SBOS437K datasheet and official product documentation.
Technical Context
The INA214BIDCKR implements a precision zero-drift chopper-stabilized amplifier topology optimized for differential sensing across shunt resistors at common-mode voltages from –0.1 V to 26 V - independent of its 2.7–26 V supply. Its internal matched resistor network (R1 = R2 = 1 MΩ, R3 = 10 kΩ) sets the 100 V/V gain and supports REF-biased output configuration.
It delivers 30 kHz bandwidth (CL = 10 pF), 0.4 V/µs slew rate, and 25 nV/√Hz input-referred voltage noise. CMRR is 105–140 dB over temperature, and PSRR exceeds 100 dB up to 100 kHz - enabling stable operation in noisy DC/DC converter feedback loops and battery protection circuits where rail integrity and signal fidelity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Fixed Gain | 100 V/V - scales 10-mV shunt drop to 1-V output, enabling high-resolution ADC interfacing without external amplification. |
| Input Offset Voltage (max) | ±60 µV RTI - ensures ≤0.6% error at 10-mV full-scale shunt drop, critical for low-current battery monitoring. |
| Offset Drift (max) | 0.5 µV/°C - limits total offset shift to <100 µV over –40°C to +125°C, preserving accuracy in automotive under-hood environments. |
| Common-Mode Range | –0.1 V to 26 V - supports high-side sensing on 24-V industrial rails and negative transient tolerance in power supply sequencing. |
| Supply Voltage Range | 2.7 V to 26 V - allows single-supply operation from Li-ion batteries (3.3 V) up to 24-V industrial systems without level-shifting. |
| Quiescent Current (max) | 100 µA - enables always-on current monitoring in energy-sensitive IoT nodes and portable devices. |
| Bandwidth | 30 kHz - sufficient for detecting overcurrent events in switch-mode power supplies and motor drivers with fast response. |
Pinout & Package
INA214BIDCKR is packaged in a 6-pin SC70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for space-constrained PCB layouts in portable electronics and telecom modules. The package supports reflow soldering per JEDEC J-STD-020 and has θJA = 227.3°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Analog reference input | Accepts 0 V to V+ reference voltage; sets output common-mode level - essential for ratiometric ADC interfacing or offset adjustment. |
| 2 (IN–) | Differential input (inverting) | Connects to load side of shunt; forms differential pair with IN+ - must be routed with matched trace length to minimize EMI-induced common-mode error. |
| 3 (V+) | Power supply input | 2.7–26 V analog supply; requires 0.1-µF ceramic bypass capacitor placed within 2 mm for stability and noise rejection. |
| 4 (IN+) | Differential input (non-inverting) | Connects to supply side of shunt; high-impedance node - sensitive to PCB leakage; guard ring recommended in humid environments. |
| 5 (GND) | Analog ground | Return path for internal bias currents and output stage; must tie to clean system AGND plane, separate from power ground if possible. |
| 6 (OUT) | Voltage output | Rail-to-rail capable (to GND +5 mV / to V+ –200 mV); drives 10-kΩ loads directly - compatible with SAR and delta-sigma ADC inputs. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Eliminates 1/f noise and thermal hysteresis, enabling stable 10-mV full-scale sensing over temperature and time - no periodic calibration needed. |
| Bidirectional current sensing | Supports both sourcing and sinking current measurement via REF pin biasing - required for battery charge/discharge state-of-charge (SoC) tracking. |
| High CMRR (105–140 dB) | Maintains accuracy despite large common-mode transients (e.g., 24-V rail switching noise), reducing need for external filtering in DC/DC converters. |
| Low quiescent current (100 µA max) | Enables continuous current monitoring in always-on subsystems (e.g., USB-C PD controllers) without compromising battery runtime. |
| SC70-6 footprint | Reduces board area by >50% vs SOIC-8 alternatives - ideal for compact power modules and multi-rail PMIC companion sensing. |
Applications
| Server Power Delivery | USB-C Power Delivery |
|---|---|
Use Scenario: Real-time monitoring of +12 V and +5 V VRM output currents in dual-rail server motherboards. IC Role / Device Role / Timing Role: High-side current-shunt monitor feeding ADC inputs of baseboard management controller (BMC). Use Value: Enables dynamic power capping and fault logging with ±0.6% full-scale error at 10-mV shunt drop - critical for ASHRAE-compliant thermal management. |
Use Scenario: Bidirectional current measurement in USB-C PD sink applications to detect charging/discharging direction and magnitude. IC Role / Device Role / Timing Role: Shunt amplifier with REF biased to mid-supply, providing polarity-aware analog output to microcontroller ADC. Use Value: Supports accurate SoC estimation and protocol compliance (USB PD 3.1) using only a 10-mΩ shunt, minimizing power loss and board space. |
| Industrial 24-V PLC I/O Modules | Telecom DC Power Distribution |
Use Scenario: Overcurrent protection and load diagnostics in 24-V digital output channels of programmable logic controllers. IC Role / Device Role / Timing Role: High-side monitor interfaced to isolated sigma-delta ADC, operating at 24 V common-mode with 3.3-V logic supply. Use Value: Delivers 30-kHz response for fast trip detection (<100 µs) while maintaining <1% gain error across –40°C to +75°C ambient - meeting IEC 61000-4-5 surge immunity requirements. |
Use Scenario: Input current supervision on -48 V telecom rectifier outputs feeding distributed power architecture (DPA) boards. IC Role / Device Role / Timing Role: Low-side current monitor referenced to system ground, driving analog front-end of power management IC. Use Value: Achieves ±60 µV offset performance even at –48 V common-mode (via level-shifted supply), enabling sub-ampere fault detection in 100-A distribution panels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA214AIDCKR | Same SC70-6 package and 100 V/V gain, but ±1% max gain error (vs ±0.5% for INA214BIDCKR) and ±100 µV max offset voltage. | Suitable for cost-sensitive industrial controls where ±1% total error is acceptable; not recommended for battery fuel gauging. | Select INA214AIDCKR only when B-grade accuracy is unnecessary and unit cost reduction is prioritized over long-term stability. |
| INA226AIRSAT | I²C-output digital current/voltage/power monitor in 10-pin WSON; includes integrated 16-bit ΔΣ ADC, on-chip calibration, and alert functions. | Replaces analog signal chain (shunt → INA214BIDCKR → external ADC); adds real-time power calculation but increases firmware complexity. | Choose INA226AIRSAT when digital bus interface, multi-parameter telemetry (V, I, P), or autonomous alerting are required - not for pure analog loop applications. |
Compared with INA214AIDCKR and INA226AIRSAT, the INA214BIDCKR provides the highest analog accuracy (±0.5% gain, ±60 µV offset) in the smallest footprint (SC70-6), making it optimal for space- and precision-critical analog feedback paths where external ADC resources are already allocated.
Availability
INA214BIDCKR is available at Aetrix Electronics and suitable for server power delivery, USB-C power delivery, industrial PLC I/O modules, and telecom DC power distribution requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production lots.
Supply support for INA214BIDCKR 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 conditioning and power management ICs.
The INA21x series was developed specifically for high-accuracy, wide common-mode current sensing in power-constrained and thermally demanding applications - targeting battery management, telecom infrastructure, and industrial automation markets.
FAQ
What is the maximum common-mode voltage supported by the INA214BIDCKR?
The INA214BIDCKR supports a common-mode input voltage range of –0.1 V to 26 V across its full operating temperature range (–40°C to +125°C). This specification applies to Versions B and C per TI's SBOS437K datasheet. The device maintains specified accuracy and stability within this range, enabling reliable high-side sensing on 24-V industrial rails and compatibility with negative transient conditions during power sequencing. The INA214BIDCKR achieves this without requiring level-shifting circuitry.
Does the INA214BIDCKR support bidirectional current measurement?
Yes, the INA214BIDCKR supports bidirectional current measurement through its REF pin. By biasing the REF input to a defined voltage (e.g., mid-supply), the output voltage swings above and below that reference in proportion to current direction and magnitude. This capability is explicitly confirmed in TI's INA21x family description and functional block diagram. The INA214BIDCKR's zero-drift architecture ensures symmetric accuracy for both sourcing and sinking currents - essential for battery charge/discharge monitoring in USB-C PD and energy storage systems.
What is the gain error specification for the INA214BIDCKR over temperature?
The INA214BIDCKR (Version B) has a maximum gain error of ±1% over the full temperature range of –40°C to +125°C, as specified in Section 5.5 of TI's SBOS437K datasheet. Its gain drift is limited to 10 ppm/°C maximum, contributing predictably to total error. This performance is distinct from the tighter ±0.5% gain error of the INA214C variant. The ±1% figure reflects worst-case deviation across process, voltage, and temperature - verified in production testing and applicable to all units marked INA214BIDCKR.
Can the INA214BIDCKR operate from a 3.3-V supply?
Yes, the INA214BIDCKR operates from a minimum supply voltage of 2.7 V, making it fully compatible with standard 3.3-V logic and microcontroller systems. At 3.3 V, it maintains full functionality including 100 V/V gain, 30 kHz bandwidth, and rail-to-rail output swing (to GND +5 mV / to V+ –200 mV). Quiescent current remains ≤100 µA, and input offset voltage stays within ±60 µV RTI. This enables direct integration into low-voltage portable electronics without external regulators or level shifters.
What package type does the INA214BIDCKR use, and is it RoHS compliant?
The INA214BIDCKR uses the SC70-6 (DCK) package - a 2.00 mm × 1.25 mm surface-mount outline with 0.65-mm lead pitch. Per TI's official packaging information and orderable addendum, this package is lead-free and RoHS compliant. It meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 and supports standard reflow profiles. No leaded or non-RoHS variants exist for the INA214BIDCKR ordering code.
INA214BIDCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- 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:
- 14 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:
- SC-70-6
INA214BIDCKR FAQ
1.How can I place an order for INA214BIDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA214BIDCKR 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 INA214BIDCKR reliable?
The price and inventory of INA214BIDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA214BIDCKR is usually 5 days.
3.What payment methods are accepted for INA214BIDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA214BIDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA214BIDCKR?
INA214BIDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA214BIDCKR 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 INA214BIDCKR?
For technical support, including INA214BIDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA214BIDCKR requirements.
6.How does Aetrix verify that INA214BIDCKR is sourced from the original manufacturer or authorized distributors?
All INA214BIDCKR 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 INA214BIDCKR meets industry standards.
7.What is the process for return or replacement of INA214BIDCKR?
All INA214BIDCKR units undergo pre-shipment inspection (PSI). If there is an issue with INA214BIDCKR, 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 INA214BIDCKR part is unused and in its original packaging.
Return procedure for INA214BIDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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