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Texas Instruments INA280A4IDCKT
- Part No.:
- INA280A4IDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
INA280A4IDCKT.pdf
- Description:
- IC OPAMP
- Quantity:
- Payment:
- Shipping:
Inventory:110
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Product details
Overview
INA280A4IDCKT from Texas Instruments is a unidirectional, high-side current sense amplifier with 200 V/V fixed gain, 2.7 V to 120 V common-mode input range, ±150 µV max offset voltage, ±0.5% max gain error, and 850 kHz bandwidth (at 20 mV input). It enables precision DC and fast transient current monitoring in 48-V server power rails and RF power amplifier bias control.
For engineers reviewing the INA280A4IDCKT datasheet, INA280A4IDCKT pinout, INA280A4IDCKT application, or INA280A4IDCKT equivalent, this page delivers verified technical context, SC-70 package layout, real-world use cases in telecom and datacenter power systems, and validated alternative options for high-voltage, high-bandwidth current sensing.
Technical Context
The INA280A4IDCKT 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 unidirectional sensing. Its internal precision resistor network fixes gain at 200 V/V with ±20 ppm/°C drift over −40°C to +125°C.
It achieves 850 kHz small-signal bandwidth at 20 mV differential input and 2 V/µs slew rate, allowing sub-2 µs response to overcurrent events on 2-mΩ shunts. The device operates from 2.7 V to 20 V supply and delivers rail-to-rail output swing (VS − 0.2 V min, GND + 25 mV max) with 370 µA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200 V/V - fixed internal ratio; sets output = 200 × shunt voltage for direct ADC interfacing without external scaling |
| Common-mode range | 2.7 V to 120 V - supports direct sensing on 48-V and 54-V telecom rails without level-shifting or attenuation networks |
| Bandwidth | 850 kHz - enables detection of fast inrush currents and overcurrent transients within ~1.2 µs (for 3 V step) |
| Offset voltage | ±150 µV max - contributes ≤0.75 mV error at 200× gain, critical for low-current accuracy down to ~3.75 mA on 2-mΩ shunt |
| CMRR | 120 dB DC min / 85 dB @ 50 kHz - rejects noise from switching regulators and RF coupling in dense PCB layouts |
| Supply current | 370 µA typical - allows always-on current monitoring in power-constrained remote radio units without significant overhead |
| Slew rate | 2 V/µs - sustains linear output for 1-V output steps in ≤0.5 µs, preserving fidelity during rapid load changes |
Pinout & Package
INA280A4IDCKT is housed in a 5-pin SC-70 (DCK) package with 2.00 mm × 1.25 mm body size and 0.65 mm pitch. The compact footprint minimizes parasitic inductance for high-frequency current measurement and suits space-constrained 48-V server VRMs and mMIMO antenna modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Amplified output | Delivers 200× shunt voltage; drives 10-kΩ loads with <25 mV headroom to GND and <200 mV to VS |
| GND (Pin 2) | Analog ground reference | Return path for internal bias and output stage; must connect to clean analog ground near shunt resistor |
| VS (Pin 3) | Power supply input | Accepts 2.7–20 V; powers internal circuitry and defines output swing limits; decoupling required within 1 cm |
| IN+ (Pin 4) | High-side shunt connection | Connects to supply side of shunt; withstands up to +122 V survival voltage; inputs 20 µA bias current |
| IN− (Pin 5) | Load-side shunt connection | Connects to load side of shunt; same voltage rating as IN+; differential input pair rejects common-mode noise |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 200 V/V gain | Eliminates external gain-setting resistors and associated tolerance/temperature drift errors in 48-V server current monitoring |
| 850 kHz bandwidth | Supports real-time overcurrent protection in macro RRU power stages with <1.5 µs latency from fault onset to alert |
| ±150 µV offset voltage | Enables accurate zero-current baseline calibration in active antenna systems where standby current must be measured below 10 mA |
| 2.7–120 V common-mode range | Directly interfaces to 48-V rack server bus bars and 54-V RF PA supplies without external attenuators or isolation |
| 370 µA quiescent current | Permits continuous current logging in battery-backed telecom equipment without compromising runtime |
Applications
| 48-V Rack Server Power Monitoring | Macro Remote Radio Unit (RRU) |
|---|---|
Use Scenario: Real-time per-phase current measurement in dual-ASIC VRMs delivering up to 100 A at 0.8 V, with 48-V input bus. IC Role / Device Role / Timing Role: High-side current sense amplifier converting mV-level shunt voltage to 0–4 V output for ADC sampling at 100 kSPS. Use Value: ±0.5% gain error and 850 kHz bandwidth ensure accurate dynamic load-step response capture and thermal derating compliance. |
Use Scenario: Bias current supervision of GaN power amplifiers in outdoor macro base stations operating at 54 V. IC Role / Device Role / Timing Role: Unidirectional current monitor feeding FPGA-based protection logic with <2 µs fault detection latency. Use Value: 120 dB CMRR suppresses switching noise from adjacent DC/DC converters, preventing false overcurrent trips. |
| Active Antenna System (mMIMO) | Test and Measurement Equipment |
Use Scenario: Per-channel transmit current monitoring across 64-element mMIMO arrays, each powered from isolated 48-V rails. IC Role / Device Role / Timing Role: Precision current sensor providing feedback to closed-loop bias controllers adjusting PA quiescent current. Use Value: ±1 µV/°C offset drift maintains calibration stability across −40°C to +85°C outdoor operating range. |
Use Scenario: High-accuracy current sourcing verification in programmable DC electronic loads rated up to 120 V. IC Role / Device Role / Timing Role: Reference-grade current sense element in feedback path of precision current-regulated power supplies. Use Value: 200 V/V gain and ±150 µV offset enable 10-bit resolution down to 1 mA on 10-mΩ shunts without signal conditioning. |
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 |
|---|---|---|---|
| INA293A4IDCKT | Same SC-70 package and 200 V/V gain, but ±20 µV max offset (10× lower), 1.1 MHz bandwidth, and 2.7–110 V common-mode range | Better suited for ultra-low-current applications (<100 mA) requiring sub-20 µV offset; less margin for 120 V survival | Select INA293A4IDCKT when offset-limited accuracy dominates over absolute voltage rating; verify 110 V max common-mode suffices |
| MAX40056AUBB+ | 200 V/V gain, 800 kHz bandwidth, ±100 µV offset, but 5-pin SOT-23 package and 2.7–65 V common-mode range | Limited to ≤65 V rails; smaller PCB footprint than SC-70 but higher thermal resistance (220°C/W vs 192°C/W) | Choose MAX40056AUBB+ only for space-constrained 48-V designs where 65 V ceiling is acceptable and thermal margin permits |
Compared with INA280A4IDCKT, INA293A4IDCKT offers superior offset performance at the cost of reduced 120 V survival margin, while MAX40056AUBB+ trades common-mode range and thermal efficiency for SOT-23 compactness-neither is pin-compatible, requiring layout revision.
Availability
INA280A4IDCKT 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) bias control requiring stable component supply across industrial temperature ranges and multi-year production cycles.
Supply support for INA280A4IDCKT 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 high-reliability power management ICs.
The INA280 family was designed specifically for high-voltage, high-bandwidth current sensing in next-generation telecom infrastructure and datacenter power systems-emphasizing low offset, wide common-mode operation, and SC-70 space efficiency.
FAQ
What is the maximum common-mode voltage the INA280A4IDCKT can withstand continuously?
The INA280A4IDCKT supports continuous operation from 2.7 V to 120 V common-mode input voltage. Its survival rating extends to −20 V to +122 V, making it suitable for transient-heavy 48-V server bus monitoring where voltage spikes exceed nominal rail levels. This 120 V operational ceiling is confirmed in Section 6.3 of the SBOSA19 datasheet under Recommended Operating Conditions.
Does the INA280A4IDCKT support bidirectional current sensing?
No, the INA280A4IDCKT is strictly unidirectional and optimized for high-side current sensing only. Its internal architecture does not allow reverse current detection or negative differential input voltages. As stated in Section 7.4.1, it measures current flowing from supply to load-applications requiring bidirectional capability must use alternatives like the INA229 or INA240.
What is the small-signal bandwidth of the INA280A4IDCKT, and how does it vary with input amplitude?
The INA280A4IDCKT has a small-signal bandwidth of 850 kHz when tested with a 20 mV differential input (Section 6.5). Bandwidth decreases slightly with lower VSENSE: Figure 7-2 shows bandwidth drops to ~750 kHz at 10 mV input. This gain-dependent behavior is inherent to its multistage transconductance design and must be accounted for in fast overcurrent protection timing budgets.
Can the INA280A4IDCKT drive a standard 10-kΩ ADC input directly?
Yes, the INA280A4IDCKT is fully specified to drive 10-kΩ loads across −40°C to +125°C, with output swing guaranteed to within 25 mV of GND and 200 mV of VS (Section 6.5). Its 500 pF maximum capacitive load rating also accommodates typical ADC input capacitance without instability, eliminating need for output buffers in most 12-bit to 16-bit sampling systems.
How does the gain error drift of the INA280A4IDCKT impact accuracy over temperature?
The INA280A4IDCKT exhibits ±20 ppm/°C maximum gain error drift over −40°C to +125°C (Section 1). Over a 165°C span, this contributes up to ±0.33% additional gain error beyond room-temperature ±0.5% limit-total worst-case gain error remains within ±0.83%. This is verified in Figure 6-4 and enables stable calibration in telecom base station environments without frequent recalibration.
INA280A4IDCKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 850 kHz
- 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
INA280A4IDCKT FAQ
1.How can I place an order for INA280A4IDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA280A4IDCKT 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 INA280A4IDCKT reliable?
The price and inventory of INA280A4IDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA280A4IDCKT is usually 5 days.
3.What payment methods are accepted for INA280A4IDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA280A4IDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA280A4IDCKT?
INA280A4IDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA280A4IDCKT 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 INA280A4IDCKT?
For technical support, including INA280A4IDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA280A4IDCKT requirements.
6.How does Aetrix verify that INA280A4IDCKT is sourced from the original manufacturer or authorized distributors?
All INA280A4IDCKT 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 INA280A4IDCKT meets industry standards.
7.What is the process for return or replacement of INA280A4IDCKT?
All INA280A4IDCKT units undergo pre-shipment inspection (PSI). If there is an issue with INA280A4IDCKT, 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 INA280A4IDCKT part is unused and in its original packaging.
Return procedure for INA280A4IDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA280A4IDCKT Tags
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