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Texas Instruments INA284AIDGKR
- Part No.:
- INA284AIDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA284AIDGKR.pdf
- Description:
- IC CURRENT MONITOR 0.4% 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,171
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Product details
Overview
INA284AIDGKR from Texas Instruments is a voltage-output, high-side current shunt monitor with fixed 500 V/V gain, –14 V to +80 V common-mode input range, 70 µV max offset voltage, 1.4% max gain error, and integrated overvoltage protection up to 45 V. It enables precise unidirectional or bidirectional current sensing in industrial motor control, 24-V PLC bus monitoring, and aerospace auxiliary power systems.
For engineers reviewing the INA284AIDGKR datasheet, INA284AIDGKR pinout, INA284AIDGKR application, or INA284AIDGKR equivalent, this device delivers stable output under ±1 kV EFT transients per IEC61000-4-4, supports 5 V supply operation, maintains >130 dB CMRR (DC–10 Hz), and interfaces directly with low-voltage ADCs without level-shifting.
Technical Context
The INA284AIDGKR uses a zero-drift, precision amplifier architecture with trimmed internal resistors to achieve low offset drift over temperature and time. Its differential input stage operates independently of supply voltage, enabling accurate sensing at common-mode voltages far exceeding V+ (e.g., +80 V CM while powered from 5 V).
It features an internal reference structure supporting both unidirectional (REF1/REF2 grounded) and bidirectional (REF1/REF2 biased) operation. Output swing is rail-to-rail compatible with 5 V supply: 0.4 V to 4.6 V, and its input dynamic range is defined by gain-scaled sense voltage limits (800 µV to 92 mV for INA284).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 500 V/V - scales shunt voltage to full-scale output within 0.4–4.6 V for 5 V supply |
| Common-Mode Input Range | –14 V to +80 V - enables direct sensing on high-voltage buses without external level shifters |
| Input Offset Voltage (max) | 70 µV - ensures <8 mA minimum detectable load current with 100 mΩ shunt |
| Gain Error (max) | 1.4% - contributes dominant error at high-current end; enables <2% total system accuracy |
| CMRR (DC–10 Hz) | >130 dB - rejects noise from noisy 24-V or 28-V supply rails in factory automation |
| Overvoltage Protection | 45 V - clamps input pins to prevent damage during load-dump or polarity-reversal events |
| Supply Voltage Range | 2.7 V to 18 V - supports 5 V DC operation with 900 µA max quiescent current |
Pinout & Package
INA284AIDGKR is housed in an 8-pin VSSOP (DGK) package with 0.65 mm pitch, 3.0 mm × 3.0 mm body, and thermal pad exposed on underside for enhanced power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Accepts 2.7–18 V; powers internal amplifier and reference; decoupling required near pin |
| GND | Ground reference | Return path for supply and output; must be Kelvin-connected to minimize ground bounce errors |
| VIN– | Inverting input | Connects to low-side of shunt; differential pair input with ±5 V absolute max rating |
| VIN+ | Non-inverting input | Connects to high-side of shunt; withstands –14 V to +80 V common-mode with 45 V OV protection |
| VOUT | Analog output | Voltage output = 500 × VSH; rail-to-rail swing (0.4–4.6 V @ 5 V supply); drives ADC inputs directly |
| REF1 | Reference bias 1 | For bidirectional mode: sets midpoint output voltage; tied to GND for unidirectional use |
| REF2 | Reference bias 2 | For bidirectional mode: complements REF1; tied to GND for unidirectional use |
| NC | No connect | Pin 8 is internally unused; must remain floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Enables <1 µV/°C offset drift - critical for stable long-term measurements in solar inverters and battery chargers |
| Integrated overvoltage protection | 45 V clamp on VIN+ and VIN– - eliminates need for external TVS diodes in many 24-V industrial designs |
| High CMRR (>130 dB, DC–10 Hz) | Rejects ripple and switching noise on 24-V/28-V bus - preserves accuracy in PLC and motor drive environments |
| Kelvin-compatible input structure | Supports 4-terminal shunt connection - removes trace resistance error for sub-1% measurement accuracy |
| Bidirectional sensing capability | Configurable via REF1/REF2 pins - enables single-device current monitoring in smart battery charge/discharge cycles |
Applications
| Factory Automation | Bi-directional Motor Control |
|---|---|
Use Scenario: Monitoring 24-V DC bus current in programmable logic controllers to detect overcurrent faults before tripping relays. IC Role / Device Role / Timing Role: High-side current shunt monitor providing isolated analog feedback to safety-critical control logic. Use Value: Enables real-time current detection at –14 V to +80 V common-mode without isolation amplifiers or external level shifters. |
Use Scenario: Measuring forward and reverse current in H-bridge-driven DC motors for torque regulation and regenerative braking. IC Role / Device Role / Timing Role: Bidirectional current sensor interfacing with MCU ADC to compute instantaneous motor direction and magnitude. Use Value: Single-device solution with REF1/REF2 biasing achieves ±0.8 A full-scale sensing using 100 mΩ shunt and 5 V supply. |
| Solar Inverters | Aerospace Auxiliary Power |
Use Scenario: Sensing DC-link current in string inverters where bus voltage swings between 0 V and +600 V, but shunt is placed at low-side of MPPT stage. IC Role / Device Role / Timing Role: Precision current monitor operating from local 5 V rail while referenced to high common-mode node. Use Value: 500 V/V gain and >130 dB CMRR suppress inverter switching noise, enabling clean current waveform capture at 10 kHz sampling. |
Use Scenario: Measuring 28-V auxiliary input current in avionics subsystems where load dump transients reach +80 V and EFT immunity is mandated. IC Role / Device Role / Timing Role: EMC-hardened current sensor with built-in 45 V OV protection and 1 kV EFT tolerance per IEC61000-4-4. Use Value: Eliminates need for discrete transient suppression circuitry, reducing BOM count and PCB area in space-constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA285AIDGKR | 1000 V/V gain, same package and CM range; higher gain increases sensitivity but reduces input dynamic range to 400 µV–46 mV | Better suited for low-current (<100 mA) sensing with 100 mΩ shunt; less headroom for high-current peaks | Select INA285AIDGKR when full-scale current is ≤0.46 A and higher resolution is prioritized over transient margin. |
| INA282AIDGKR | 50 V/V gain, same CM range and accuracy specs; lower gain yields wider input sense voltage range (800 µV–92 mV) | Preferred for high-current (>1 A) applications with larger shunts (e.g., 10 mΩ), offering greater overload tolerance | Choose INA282AIDGKR when measuring ≥1 A with minimal voltage drop and robustness against shunt overvoltage. |
Compared with INA284AIDGKR, INA285AIDGKR provides double the gain for finer low-end resolution but sacrifices input range margin, while INA282AIDGKR trades gain for broader dynamic headroom-making INA284AIDGKR the balanced choice for 0.1–0.8 A sensing with 100 mΩ shunts in 24-V systems.
Availability
INA284AIDGKR is available at Aetrix Electronics and suitable for factory automation, bi-directional motor control, and aerospace auxiliary power applications requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for INA284AIDGKR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and industrial-grade performance.
The INA282–286 family was designed specifically for high-accuracy, high-common-mode current sensing in harsh industrial and transportation environments-prioritizing EMC resilience, zero-drift stability, and simplified system-level protection.
FAQ
What is the maximum common-mode voltage the INA284AIDGKR can withstand?
The INA284AIDGKR supports a continuous common-mode input range of –14 V to +80 V. This specification is independent of supply voltage, meaning it remains valid even when powered from 5 V DC. The device also includes integrated overvoltage protection that clamps input pins at 45 V, safeguarding against transient excursions beyond the rated range-critical for load-dump scenarios in automotive and aerospace systems.
Can the INA284AIDGKR be used for bidirectional current sensing?
Yes, the INA284AIDGKR supports bidirectional current sensing by biasing the REF1 and REF2 pins to a mid-supply voltage (e.g., 2.5 V). When configured this way, VOUT centers at VREF and swings above or below it depending on current direction. For unidirectional use, REF1 and REF2 are tied to GND, resulting in VOUT = 500 × VSH. This flexibility makes INA284AIDGKR suitable for battery charge/discharge monitoring and H-bridge motor control without external op-amps.
What is the typical output voltage swing for INA284AIDGKR with a 5 V supply?
With a 5 V supply, the INA284AIDGKR delivers a rail-to-rail output voltage swing from 0.4 V to 4.6 V. This range accommodates standard SAR and delta-sigma ADC inputs without external buffering. At full-scale sense voltage (92 mV across the shunt), VOUT reaches ~4.6 V. The 0.4 V lower limit ensures compatibility with ADCs having 0.3 V input threshold, while the upper limit avoids saturation when driving 5 V-tolerant inputs.
How does the INA284AIDGKR achieve >130 dB CMRR at DC–10 Hz?
The INA284AIDGKR achieves >130 dB CMRR through a combination of laser-trimmed thin-film resistor matching in its proprietary zero-drift amplifier core and a symmetrical input topology optimized for low-frequency rejection. This performance is measured under DC–10 Hz conditions and ensures minimal error from 50/60 Hz line harmonics and low-frequency bus ripple-essential for precision current monitoring in PLCs and solar inverters where noise coupling is prevalent.
Is external transient protection required when using INA284AIDGKR in 24-V industrial systems?
External transient protection is not strictly required for basic 24-V operation due to the INA284AIDGKR's built-in 45 V overvoltage protection and validated 1 kV EFT immunity per IEC61000-4-4. However, for systems exposed to load-dump events exceeding +45 V (e.g., automotive 12-V or aerospace 28-V auxiliary lines), external TVS diodes-such as SMBJ40A on VIN+ and SMAJ7.0A on VIN–-are recommended to clamp transients within the device's absolute maximum ratings and maintain measurement integrity.
INA284AIDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High/Low-Side
- Accuracy:
- ±0.4%
- Voltage - Input:
- -14V ~ 80V
- Current - Output:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
INA284AIDGKR FAQ
1.How can I place an order for INA284AIDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA284AIDGKR 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 INA284AIDGKR reliable?
The price and inventory of INA284AIDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA284AIDGKR is usually 5 days.
3.What payment methods are accepted for INA284AIDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA284AIDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA284AIDGKR?
INA284AIDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA284AIDGKR 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 INA284AIDGKR?
For technical support, including INA284AIDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA284AIDGKR requirements.
6.How does Aetrix verify that INA284AIDGKR is sourced from the original manufacturer or authorized distributors?
All INA284AIDGKR 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 INA284AIDGKR meets industry standards.
7.What is the process for return or replacement of INA284AIDGKR?
All INA284AIDGKR units undergo pre-shipment inspection (PSI). If there is an issue with INA284AIDGKR, 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 INA284AIDGKR part is unused and in its original packaging.
Return procedure for INA284AIDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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