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Texas Instruments INA280A2IDCKT
- Part No.:
- INA280A2IDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
INA280A2IDCKT.pdf
- Description:
- IC OPAMP
- Quantity:
- Payment:
- Shipping:
Inventory:339
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Product details
Overview
INA280A2IDCKT from Texas Instruments is a high-side unidirectional current sense amplifier in SC-70 package, delivering 50 V/V fixed gain, ±0.5% max gain error, ±150 µV max input offset voltage, and 1.1 MHz bandwidth at 50 V/V. It operates from 2.7 V to 20 V supply and supports common-mode voltages up to 120 V - ideal for precision 48-V server power rail monitoring.
For engineers reviewing the INA280A2IDCKT datasheet, INA280A2IDCKT pinout, INA280A2IDCKT application, or INA280A2IDCKT equivalent, this page delivers verified specifications, validated SC-70 pin mapping, real-world use cases in telecom and server power, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The INA280A2IDCKT uses a transconductance architecture with current-feedback amplifier topology, enabling 20 µA typical input bias current even at 120 V common-mode voltage and supporting only high-side sensing. Its DC CMRR is ≥120 dB (min), with 85 dB AC CMRR at 50 kHz - critical for rejecting noise in noisy 48-V/54-V RF power amplifier supplies.
It features unidirectional operation only, with output swing limited to GND + 25 mV (max) at zero input and VS – 0.2 V (min) at full load. Bandwidth is gain-dependent: 1.1 MHz at 50 V/V with 5 pF load, and slew rate is fixed at 2 V/µs - enabling sub-2 µs response to 75-A overcurrent events on 2-mΩ shunts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V - fixed internal resistor network; enables 100 mV output for 2-A sensed current across 10-mΩ shunt |
| Gain Error | ±0.5% (max) - ensures ≤5 mV absolute error at 1 V output, critical for <1% current measurement accuracy |
| Input Offset Voltage | ±150 µV (max) - contributes ≤3 µV error after gain, supporting accurate low-current detection down to ~6 mA |
| Common-Mode Range | 2.7 V to 120 V - allows direct sensing on 48-V, 54-V, and 120-V rails without level-shifting or attenuation |
| Bandwidth | 1.1 MHz at 50 V/V - supports fast overcurrent protection in macro RRU and active antenna systems |
| Supply Current | 370 µA (typ) - enables low-power monitoring in always-on telecom subsystems without thermal penalty |
| CMRR | ≥120 dB DC / 85 dB @ 50 kHz - rejects supply ripple and switching noise in high-density server PSUs |
Pinout & Package
INA280A2IDCKT is housed in a 5-pin SC-70 (DCK) package with 2.00 mm × 1.25 mm body size and 0.65 mm pitch - optimized for space-constrained 48-V server and mMIMO PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Amplified output | Delivers 50×(VIN+ − VIN−); swings from GND + 25 mV to VS − 0.2 V - interfaces directly with 12-bit ADCs or comparator inputs |
| GND (Pin 2) | Analog ground reference | Must connect to clean system ground plane; separates signal return from power ground to avoid PSRR degradation |
| VS (Pin 3) | Positive supply | Accepts 2.7–20 V; powers internal bias and output stage - decoupling capacitor required within 1 cm of pin |
| IN+ (Pin 4) | High-side shunt connection | Connects to supply side of shunt resistor; withstands up to 122 V survival voltage - no external clamping needed |
| IN− (Pin 5) | Load-side shunt connection | Connects to load side of shunt; forms differential input pair with IN+ - layout symmetry critical for CMRR performance |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input offset drift | ±1 µV/°C - maintains <15 µV total offset shift over −40°C to +125°C, enabling stable calibration in industrial base stations |
| High-speed overcurrent response | 2 V/µs slew rate + 1.1 MHz BW - detects 75-A fault in <2 µs on 2-mΩ shunt, meeting IEC 61000-4-5 surge protection timing |
| Low input bias current | 20 µA (typ) at 120 V CM - minimizes voltage drop error in high-value shunts used for low-current standby monitoring |
| Wide supply range | 2.7 V to 20 V - allows single 3.3-V or 5-V rail operation across diverse host systems without LDO dependency |
| Robust ESD rating | ±2000 V HBM - survives handling and board-level assembly in automated telecom manufacturing lines |
Applications
| 48-V Rack Server Power Monitoring | Macro Remote Radio Unit (RRU) |
|---|---|
Use Scenario: Real-time current monitoring of 48-V intermediate bus feeding FPGA, ASIC, and memory banks in hyperscale data center servers. IC Role / Device Role / Timing Role: High-side current sense amplifier measuring shunt voltage with 120-V common-mode tolerance and 1.1-MHz bandwidth for dynamic load step detection. Use Value: Enables precise power budgeting and early overcurrent warning before thermal shutdown - reducing unplanned downtime in Tier-3+ facilities. |
Use Scenario: Continuous current supervision of 54-V RF power amplifier stages in outdoor macro cell sites operating from −40°C to +70°C ambient. IC Role / Device Role / Timing Role: Unidirectional current sense amplifier with ±150 µV offset and ±1 µV/°C drift - maintaining accuracy across wide temperature excursions. Use Value: Supports predictive maintenance by detecting gradual PA degradation via current signature shifts - extending field unit lifetime beyond 10 years. |
| Active Antenna System (mMIMO) | Test and Measurement Equipment |
Use Scenario: Per-channel current measurement in 64T64R mMIMO base station arrays where space and thermal density constrain component selection. IC Role / Device Role / Timing Role: SC-70 packaged current sense amplifier delivering 50 V/V gain and 2.0 mm × 1.25 mm footprint - minimizing PCB area per RF chain. Use Value: Reduces total BOM count and layout complexity vs. larger SOIC alternatives - accelerating time-to-market for 5G NR deployments. |
Use Scenario: Precision current sourcing/sinking verification in programmable DC electronic loads and battery cyclers requiring <0.1% measurement linearity. IC Role / Device Role / Timing Role: Fixed-gain current sense amplifier with ±0.5% gain error and 120-dB DC CMRR - rejecting common-mode noise from switching power supplies. Use Value: Eliminates need for external calibration during production test - cutting test station cost and cycle time by 18% in ATE environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA293A2IDCKT | Same SC-70 package and 50 V/V gain, but ±20 µV max offset (vs. ±150 µV), 1.2 MHz BW, and 2.7–20 V supply - tighter initial accuracy at higher cost | Better suited for metrology-grade lab equipment; less cost-effective for telecom infrastructure where ±150 µV meets spec | Select INA293A2IDCKT only when offset-critical calibration-free operation is mandatory and BOM cost premium is acceptable |
| MAX4008AUA+T | 50 V/V gain in µMAX-8 package (3.0 mm × 3.0 mm), ±100 µV offset, 800 kHz BW, 2.7–5.5 V supply - lower bandwidth and narrower supply range | Valid for 3.3-V/5-V embedded systems with relaxed speed requirements; incompatible with 12-V or 48-V high-side rails | Choose MAX4008AUA+T only for low-voltage, space-tolerant designs where 1.1 MHz BW and 120-V CM are unnecessary |
Compared with INA280A2IDCKT, INA293A2IDCKT offers superior offset performance at higher cost and same footprint, while MAX4008AUA+T trades bandwidth and common-mode range for lower supply voltage compatibility - making INA280A2IDCKT the optimal balance for 48-V telecom and server applications.
Availability
INA280A2IDCKT is available at Aetrix Electronics and suitable for 48-V rack server power monitoring, macro remote radio unit (RRU) current supervision, and active antenna system (mMIMO) channel sensing requiring stable component supply across multi-year production cycles.
Supply support for INA280A2IDCKT 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 solutions, with over 50 years of innovation in precision signal conditioning and power management ICs.
The INA280 family was designed specifically for high-accuracy, high-bandwidth current sensing in next-generation telecom infrastructure and high-density server power systems - emphasizing small footprint, wide common-mode operation, and robust thermal performance.
FAQ
What is the maximum common-mode voltage supported by the INA280A2IDCKT?
The INA280A2IDCKT supports an operational common-mode input voltage range of 2.7 V to 120 V, with survival capability up to −20 V to +122 V. This allows direct high-side sensing on 48-V, 54-V, and 120-V rails without external attenuation or level-shifting circuitry - a key enabler for compact RRU and server PSU designs where board space is constrained.
Does the INA280A2IDCKT support bidirectional current sensing?
No, the INA280A2IDCKT operates in unidirectional mode only, as confirmed in Section 7.4.1 of the official datasheet. It measures current flowing from supply to load (high-side configuration) and cannot detect reverse current flow. For bidirectional applications, TI recommends the INA229 or similar devices explicitly specified for dual-direction operation.
What is the output voltage swing capability of the INA280A2IDCKT at 5-V supply?
At VS = 5 V, the INA280A2IDCKT output swings from GND + 0.005 V (min) to VS − 0.07 V (typ), or approximately 4.93 V. This rail-to-rail output capability ensures full utilization of 12-bit ADC input ranges and supports reliable overcurrent detection thresholds without external level-shifting - critical for fast-response protection circuits in telecom power systems.
Can the INA280A2IDCKT be used with a 3.3-V supply?
Yes, the INA280A2IDCKT operates from 2.7 V to 20 V supply, so 3.3 V is fully supported. At 3.3 V, its output swing remains functional (GND + 5 mV to ~3.23 V), and quiescent current stays near 370 µA - making it suitable for low-power monitoring in always-on subsystems like baseband processors or fan controllers in 48-V server racks.
How does the gain option A2 map to the INA280A2IDCKT part number?
The "A2" suffix in INA280A2IDCKT explicitly denotes the 50 V/V fixed gain version, as defined in Table 1 of the datasheet. This gain is set by an internal precision resistor network (10 kΩ R1 / 500 kΩ RL), eliminating external components and ensuring ±0.5% max gain error across −40°C to +125°C - a critical specification for stable current measurement in thermally variable base station enclosures.
INA280A2IDCKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.1 MHz
- Current - Input Bias:
- 20 µA
- Voltage - Input Offset:
- 15 µV
- Current - Supply:
- 370µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 20 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
INA280A2IDCKT FAQ
1.How can I place an order for INA280A2IDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA280A2IDCKT 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 INA280A2IDCKT reliable?
The price and inventory of INA280A2IDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA280A2IDCKT is usually 5 days.
3.What payment methods are accepted for INA280A2IDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA280A2IDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA280A2IDCKT?
INA280A2IDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA280A2IDCKT 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 INA280A2IDCKT?
For technical support, including INA280A2IDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA280A2IDCKT requirements.
6.How does Aetrix verify that INA280A2IDCKT is sourced from the original manufacturer or authorized distributors?
All INA280A2IDCKT 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 INA280A2IDCKT meets industry standards.
7.What is the process for return or replacement of INA280A2IDCKT?
All INA280A2IDCKT units undergo pre-shipment inspection (PSI). If there is an issue with INA280A2IDCKT, 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 INA280A2IDCKT part is unused and in its original packaging.
Return procedure for INA280A2IDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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