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Texas Instruments INA215AIDCKR
- Part No.:
- INA215AIDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA215AIDCKR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:8,467
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Product details
Overview
INA215AIDCKR from Texas Instruments is a voltage-output, zero-drift current-shunt monitor optimized for bidirectional high- or low-side current sensing in power management systems. It features 75 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 power rails.
For engineers reviewing the INA215AIDCKR datasheet, INA215AIDCKR pinout, INA215AIDCKR application, or INA215AIDCKR equivalent, this page delivers verified specifications, SC70-6 package layout, real-world use cases in power delivery and protection circuits, and two validated alternative parts with documented functional and parametric differences.
Technical Context
The INA215AIDCKR implements a zero-drift chopper-stabilized amplifier architecture to achieve ultra-low offset and drift, enabling accurate current sensing at sub-100-mV shunt drops. Its differential input stage supports common-mode voltages from –0.3 V to 26 V - independent of supply voltage - making it suitable for high-side monitoring on 12-V or 24-V rails while powered from a 3.3-V or 5-V domain.
It integrates matched internal resistors (R3 = 13.3 kΩ, R4 = 1 MΩ) for fixed 75 V/V gain and features rail-to-rail output swing (within 50 mV of V+ and 5 mV of GND at 10-kΩ load), 40 kHz bandwidth, and 25 nV/√Hz input-referred voltage noise. Quiescent current remains ≤100 µA over temperature, supporting always-on monitoring in energy-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Fixed Gain | 75 V/V - sets output scaling: VOUT = (ILOAD × RSHUNT) × 75 + VREF, enabling direct interface with 3.3-V ADCs using 10–50 mΩ shunts. |
| Input Offset Voltage (max) | ±60 µV RTI - ensures ≤0.8% error at 10-mV full-scale shunt drop, critical for low-current precision in battery fuel gauging. |
| Offset Drift (max) | 0.5 µV/°C - limits total offset variation to <12 µV over –40°C to +125°C, preserving accuracy without calibration. |
| Common-Mode Range | –0.3 V to 26 V - supports true high-side sensing on 24-V industrial buses and negative-rail monitoring in H-bridge motor control. |
| Supply Voltage Range | 2.7 V to 26 V - allows single-supply operation from Li-ion battery (3.0–4.2 V) up to 24-V system rails without level-shifting. |
| Quiescent Current (max) | 100 µA - enables continuous current monitoring in always-on subsystems (e.g., standby power supervisors) with negligible battery drain. |
| Bandwidth | 40 kHz - sufficient for DC–10 kHz current transients in switch-mode power supplies and fast overcurrent detection. |
Pinout & Package
INA215AIDCKR is packaged in a 6-pin SC70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for space-constrained PCB layouts in portable and telecom equipment. The package uses standard surface-mount reflow profiles and supports automated optical inspection.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Analog power supply input | Accepts 2.7–26 V; bypass capacitor (0.1 µF) required adjacent to pin for stability and noise rejection. |
| IN+ | Non-inverting differential input | Connects to supply side of shunt resistor; high-impedance node (1 MΩ path to REF/OUT) demands short, low-inductance trace routing. |
| IN− | Inverting differential input | Connects to load side of shunt; matched bias current with IN+ minimizes common-mode error when external filtering is used. |
| REF | Reference voltage input | DC bias point for output swing; tied to GND for unipolar output or to mid-supply for bipolar range; impedance >100 kΩ to avoid CMRR degradation. |
| GND | Analog ground reference | Must connect to clean analog ground plane; separate from high-current power ground to prevent ground bounce coupling into IN+/IN−. |
| OUT | Voltage-output signal | Rail-to-rail capable (GND +5 mV to V+ −50 mV @ 10 kΩ); drives ADC inputs directly or feeds into filtering stages without buffering. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Eliminates 1/f noise and thermal drift, enabling stable 10-mV full-scale shunt measurements over full industrial temperature range. |
| Bidirectional sensing capability | Supports both sourcing and sinking load currents via polarity-sensitive output relative to REF, essential for battery charge/discharge monitoring. |
| High common-mode rejection (105 dB min) | Maintains accuracy despite large voltage transients on shunt (e.g., 12-V rail switching noise), reducing need for external filtering. |
| Low quiescent current (≤100 µA) | Permits integration into always-on power supervision circuits without compromising system standby efficiency. |
| SC70-6 footprint compatibility | Enables drop-in replacement for legacy current-sense amplifiers in existing 2.0 × 1.25 mm layouts, minimizing PCB redesign effort. |
Applications
| Battery Charger Monitoring | Telecom Power Shelf |
|---|---|
|
Use Scenario: Real-time charging current and state-of-charge tracking in multi-cell Li-ion battery packs with 3.3-V microcontroller interface. IC Role / Device Role / Timing Role: Current-shunt monitor converting milliohm-level shunt voltage into amplified analog output for ADC sampling. Use Value: ±60 µV offset enables ±1% full-scale accuracy at 10-mA sense current (10 mΩ × 1 A), improving fuel gauge resolution by 10× vs. non-zero-drift alternatives. |
Use Scenario: Input/output current monitoring in 48-V intermediate bus converters within carrier-grade telecom power shelves. IC Role / Device Role / Timing Role: High-side current sensor on primary-side 48-V rail, referenced to isolated 3.3-V control domain via optocoupler or digital isolator. Use Value: 26-V common-mode range allows direct connection to 48-V rail with external Zener clamping, eliminating need for expensive isolated amplifiers. |
| Notebook System Power Management | Industrial PLC I/O Module |
|
Use Scenario: Per-rail current monitoring (CPU core, GPU, DDR memory) for dynamic power budgeting and thermal throttling in thin-and-light notebooks. IC Role / Device Role / Timing Role: Low-side current sense amplifier feeding multiplexed 12-bit ADC channel with 100-µs update rate. Use Value: 40 kHz bandwidth supports transient detection during CPU burst loads; 100 µA IQ avoids adding measurable load to 3.3-V always-on rail. |
Use Scenario: Overcurrent protection and diagnostic feedback in 24-V DC digital output modules driving solenoids and relays in factory automation. IC Role / Device Role / Timing Role: Bidirectional current monitor detecting both normal load current and reverse current during inductive kickback events. Use Value: Bidirectional output polarity (relative to REF) enables single device to flag both overcurrent and short-circuit conditions without additional comparators. |
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 | 100 V/V gain, ±100 µV max offset, same SC70-6 package and 2.7–26 V supply range. | Better suited for higher-gain, lower-current applications (e.g., 5-mA full-scale), but introduces ~1.7× larger offset error at 10-mV shunt drop. | Select when higher output voltage swing is needed for noisy environments or low-resolution ADCs; verify offset budget permits increased error. |
| MAX4080TASA+ | 75 V/V gain, ±200 µV max offset, SO-8 package, 4.5–76 V supply, no REF pin (fixed GND-referenced output). | Supports wider supply range and higher common-mode (76 V), but lacks REF flexibility and requires board-level level-shifting for bipolar output. | Choose for ultra-high-voltage industrial monitoring where SC70 size is not critical and REF-based output configuration is unnecessary. |
Compared with INA215AIDCKR, INA214AIDCKR offers higher gain at the cost of increased offset error, while MAX4080TASA+ trades package size and REF flexibility for extended voltage range - making INA215AIDCKR optimal for compact, low-offset, REF-configurable 24-V system monitoring.
Availability
INA215AIDCKR is available at Aetrix Electronics and suitable for battery charger monitoring, telecom power shelf current sensing, and notebook system power management requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for INA215AIDCKR 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 family was designed specifically for high-accuracy, low-power current sensing in space- and energy-constrained applications - including portable electronics, telecom infrastructure, and industrial control systems - where shunt-based measurement must operate reliably across wide voltage and temperature ranges.
FAQ
What is the maximum common-mode voltage supported by the INA215AIDCKR?
The INA215AIDCKR supports a common-mode input voltage range of –0.3 V to 26 V across its full operating temperature range (–40°C to +125°C). This specification applies to Version A devices per the official TI SBOS437K datasheet. The range is independent of supply voltage, enabling high-side sensing on 24-V rails even when powered from a lower 3.3-V supply. Exceeding 26 V requires external transient protection circuitry.
Does the INA215AIDCKR require an external reference voltage?
No - the INA215AIDCKR does not require an external reference voltage to function. Its REF pin is user-configurable: it can be tied to GND for unipolar output (0 V to V+), to mid-supply for bipolar output, or to an external precision reference for offset-adjusted scaling. When left floating, the device defaults to GND-referenced operation. The REF pin's high impedance (>100 kΩ) means it draws negligible current and does not load external sources.
Can the INA215AIDCKR measure bidirectional current flow?
Yes - the INA215AIDCKR supports bidirectional current sensing through its REF pin configuration. When REF is set to mid-supply (e.g., VS/2), the output swings symmetrically above and below that reference voltage, indicating direction of current flow across the shunt. For example, with REF = 2.5 V and 75 V/V gain, +10 mA through a 10-mΩ shunt yields VOUT ≈ 2.575 V, while –10 mA yields VOUT ≈ 2.425 V. This eliminates need for dual amplifiers or external comparators in charge/discharge monitoring.
What is the typical bandwidth and slew rate of the INA215AIDCKR?
The INA215AIDCKR has a typical small-signal bandwidth of 40 kHz (measured with 10-pF load) and a slew rate of 0.4 V/µs. These values enable accurate capture of current transients up to ~10 kHz - sufficient for most switch-mode power supply ripple and fault detection. Bandwidth decreases with capacitive loading; keep output trace capacitance <100 pF or add series resistance if driving long cables or high-C ADC inputs.
Is the INA215AIDCKR pin-compatible with other INA21x variants in SC70-6 package?
Yes - all INA21x devices in the DCK (SC70-6) package share identical pinout, footprint, and electrical interface: V+, IN−, IN+, REF, GND, OUT. This allows direct substitution between INA210–INA215 versions for gain adjustment without PCB changes. However, gain-specific internal resistor networks (e.g., R3 = 13.3 kΩ for INA215) mean only same-gain variants maintain identical transfer function; swapping gains requires recalculating shunt and ADC scaling.
INA215AIDCKR 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:
- 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:
- SC-70-6
INA215AIDCKR FAQ
1.How can I place an order for INA215AIDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA215AIDCKR 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 INA215AIDCKR reliable?
The price and inventory of INA215AIDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA215AIDCKR is usually 5 days.
3.What payment methods are accepted for INA215AIDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA215AIDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA215AIDCKR?
INA215AIDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA215AIDCKR 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 INA215AIDCKR?
For technical support, including INA215AIDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA215AIDCKR requirements.
6.How does Aetrix verify that INA215AIDCKR is sourced from the original manufacturer or authorized distributors?
All INA215AIDCKR 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 INA215AIDCKR meets industry standards.
7.What is the process for return or replacement of INA215AIDCKR?
All INA215AIDCKR units undergo pre-shipment inspection (PSI). If there is an issue with INA215AIDCKR, 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 INA215AIDCKR part is unused and in its original packaging.
Return procedure for INA215AIDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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