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Texas Instruments INA280A2IDCKR
- Part No.:
- INA280A2IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
INA280A2IDCKR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,393
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Product details
Overview
INA280A2IDCKR from Texas Instruments is a unidirectional, high-side 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 measures shunt voltages across common-mode ranges up to 120 V - ideal for precision 48-V server power rail monitoring.
For engineers reviewing the INA280A2IDCKR datasheet, INA280A2IDCKR pinout, INA280A2IDCKR application, or INA280A2IDCKR equivalent, this page delivers verified specifications, validated SC-70 pin mapping, real-world use cases in telecom and server power systems, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The INA280A2IDCKR 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 50 V/V with ±20 ppm/°C drift over −40°C to +125°C.
It achieves 120 dB minimum DC CMRR and 85 dB AC CMRR at 50 kHz, while maintaining 2 V/µs slew rate and 9 µs settling time to 0.5%. The device's output swings to within 70 mV of VS and 25 mV above GND under load, enabling accurate low-current detection in 48-V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V fixed - sets output = 50 × shunt voltage; enables 100-mV full-scale input for 5-V output |
| Gain error | ±0.5% max - contributes ≤25 mV error at 5-V output; critical for <1% current measurement accuracy |
| Input offset voltage | ±150 µV max - limits minimum resolvable current (e.g., 3 mA on 50-mΩ shunt) |
| Bandwidth | 1.1 MHz at 50 V/V - supports <2 µs overcurrent response for 75-A/2-mΩ fault detection |
| Common-mode range | 2.7 V to 120 V operational - allows direct sensing on 48-V and 54-V telecom rails without level-shifting |
| Supply voltage | 2.7 V to 20 V - compatible with 3.3-V or 5-V logic supplies while monitoring high-voltage power paths |
| Quiescent current | 370 µA typical - enables always-on monitoring in power-constrained RF PA and server control loops |
Pinout & Package
INA280A2IDCKR is housed in a 5-pin SC-70 (DCK) package with 2.00 mm × 1.25 mm body size and 0.65-mm lead pitch. This ultra-compact footprint minimizes PCB area in space-constrained 48-V server VRMs and active antenna modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Amplified output | Delivers 50× shunt voltage; swings to within 70 mV of VS and 25 mV above GND into 10-kΩ load |
| GND (Pin 2) | Analog ground reference | Return path for internal bias and output stage; must connect to clean system ground near shunt |
| VS (Pin 3) | Positive supply | Accepts 2.7–20 V; powers internal circuitry and defines output swing ceiling |
| IN+ (Pin 4) | High-side shunt connection | Connects to supply side of shunt; common-mode voltage here reaches up to 120 V |
| IN− (Pin 5) | Load-side shunt connection | Connects to load side of shunt; differential input (IN+ − IN−) is amplified with 50× gain |
Key Features
| Feature | Design Value |
|---|---|
| High common-mode rejection | 120 dB min DC CMRR ensures <0.1% error from 48-V rail noise coupling into shunt measurement |
| Low input bias current | 20 µA typical up to 120 V CM - avoids significant voltage drop across high-value shunts (>1 Ω) |
| Fast transient response | 2 V/µs slew rate + 1.1 MHz BW enables sub-2-µs detection of inrush currents in RRU protection circuits |
| Extended temperature operation | Specified from −40°C to +125°C - supports deployment in base station enclosures and server chassis hot zones |
| Small-footprint packaging | SC-70 (2.0 mm × 1.25 mm) reduces layout area by >50% vs SOIC-8, easing placement near high-current traces |
Applications
| 48-V Rack Server Power Monitoring | Macro Remote Radio Unit (RRU) |
|---|---|
|
Use Scenario: Real-time current monitoring of 48-V intermediate bus feeding multiple VRMs in hyperscale data center servers. IC Role / Device Role / Timing Role: High-side current sense amplifier converting mV-level shunt voltage to 0–5 V analog output for ADC sampling at 100 kSPS. Use Value: ±0.5% gain error and ±150 µV offset enable <1% full-scale current accuracy across −40°C to +85°C ambient, meeting ASHRAE A4 thermal compliance. |
Use Scenario: Overcurrent protection and PA bias current feedback in outdoor macro-cell RRUs powered from −48 V DC telco supply. IC Role / Device Role / Timing Role: Unidirectional high-side amplifier driving fast comparator input for <2 µs fault shutdown during lightning-induced surges. Use Value: 1.1 MHz bandwidth and 2 V/µs slew rate ensure reliable 75-A/2-mΩ fault detection within 1.5 µs - faster than legacy solutions using op-amp-based comparators. |
| Active Antenna System (AAS) mMIMO | 48-V Merchant Network Switch PSU |
|
Use Scenario: Per-channel RF power amplifier current sensing in 64T64R massive MIMO base station arrays with distributed 48-V distribution. IC Role / Device Role / Timing Role: Compact SC-70 current sensor placed adjacent to GaN PA module, feeding analog telemetry to FPGA-based health monitor. Use Value: 2.0 mm × 1.25 mm SC-70 footprint allows integration directly on PA daughterboard without compromising RF layout integrity or thermal dissipation. |
Use Scenario: Input current supervision of multi-phase 48-V-to-12-V buck converters in enterprise network switches with strict efficiency targets. IC Role / Device Role / Timing Role: Precision shunt amplifier providing feedback to digital PWM controller for adaptive phase shedding and loss optimization. Use Value: ±20 ppm/°C gain drift ensures stable current loop gain across chassis temperatures (0–70°C), preventing false phase-drop events during thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA293A2IDBVR | Same 50 V/V gain, but wider 2.7–110 V common-mode range and higher 1.5 MHz bandwidth; offset voltage ±120 µV (tighter), quiescent current 420 µA (higher) | Better suited for 100-V industrial motor drives; less optimal for 120-V telecom rails where INA280A2IDCKR's survival rating (−20 V to +122 V) adds margin | Select INA293A2IDBVR when bandwidth >1.1 MHz is required and 120-V operation is not needed; verify PCB layout for SOT-23-5 thermal relief |
| MAX40056AUB+T | 50 V/V gain, 1.2 MHz bandwidth, ±100 µV offset, but narrower 0–65 V common-mode range and 5.5-V max supply; requires dual supply for bidirectional sensing | Designed for automotive battery monitoring (12 V/48 V); incompatible with 54-V RRU or 120-V server backplanes | Choose MAX40056AUB+T only for 48-V automotive or low-voltage industrial systems where bidirectional capability is mandatory and 120-V tolerance is unnecessary |
Compared with INA293A2IDBVR and MAX40056AUB+T, the INA280A2IDCKR uniquely combines 120-V operational common-mode, SC-70 compactness, and guaranteed 1.1-MHz bandwidth at 50 V/V - making it the only option qualified for space-constrained, high-voltage telecom and server power monitoring where survival margin and layout density are critical.
Availability
INA280A2IDCKR is available at Aetrix Electronics and suitable for 48-V rack server power monitoring, macro remote radio unit (RRU) protection, active antenna system (AAS) mMIMO telemetry, and merchant network switch PSU supervision requiring stable component supply across extended temperature and high-common-mode environments.
Supply support for INA280A2IDCKR 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 INA280 product line was designed specifically for high-accuracy, high-bandwidth current sensing in next-generation 48-V and high-voltage telecom and data center infrastructure - emphasizing small size, wide common-mode tolerance, and robust thermal performance.
FAQ
What is the maximum common-mode voltage the INA280A2IDCKR can withstand continuously?
The INA280A2IDCKR supports continuous operation from 2.7 V to 120 V common-mode voltage, with survival rating up to −20 V to +122 V. This allows direct connection across 48-V, 54-V, and 120-V power rails without external attenuation or level-shifting circuitry - a key advantage over alternatives limited to 65 V or 80 V.
Does the INA280A2IDCKR support bidirectional current sensing?
No, the INA280A2IDCKR is strictly unidirectional and optimized for high-side current sensing only. Its internal architecture does not support negative differential inputs or reverse current flow detection. For bidirectional applications, TI recommends the INA229 or INA240 families instead of the INA280A2IDCKR.
What is the output voltage swing capability of the INA280A2IDCKR at 5-V supply?
At VS = 5 V, the INA280A2IDCKR output swings from GND + 25 mV (minimum) to VS − 70 mV (maximum) into a 10-kΩ load across −40°C to +125°C. This 4.93-V usable range enables full-scale 5-V ADC interfacing while preserving headroom for noise margin and temperature drift.
How does the 1.1-MHz bandwidth of the INA280A2IDCKR translate to overcurrent response time?
With 2 V/µs slew rate and 1.1-MHz bandwidth, the INA280A2IDCKR achieves <2 µs response for a 3-V output step (e.g., 75-A fault on 2-mΩ shunt). This enables fast comparator triggering in telecom RRU protection circuits - significantly faster than legacy 100-kHz amplifiers that require >10 µs to settle.
Is the INA280A2IDCKR pin-compatible with other variants in the INA280 family?
Yes, all INA280 variants (A1–A5) share identical SC-70 (DCK) 5-pin pinout and footprint. Engineers may substitute INA280A2IDCKR with INA280A1IDCKR or INA280A3IDCKR without PCB changes - only the gain changes (20 V/V, 50 V/V, or 100 V/V), allowing flexible design reuse across current-sense ranges.
INA280A2IDCKR 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:
- 1.1 MHz
- -3db Bandwidth:
- -
- 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
INA280A2IDCKR FAQ
1.How can I place an order for INA280A2IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA280A2IDCKR 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 INA280A2IDCKR reliable?
The price and inventory of INA280A2IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA280A2IDCKR is usually 5 days.
3.What payment methods are accepted for INA280A2IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA280A2IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA280A2IDCKR?
INA280A2IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA280A2IDCKR 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 INA280A2IDCKR?
For technical support, including INA280A2IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA280A2IDCKR requirements.
6.How does Aetrix verify that INA280A2IDCKR is sourced from the original manufacturer or authorized distributors?
All INA280A2IDCKR 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 INA280A2IDCKR meets industry standards.
7.What is the process for return or replacement of INA280A2IDCKR?
All INA280A2IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with INA280A2IDCKR, 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 INA280A2IDCKR part is unused and in its original packaging.
Return procedure for INA280A2IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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