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Texas Instruments INA290A1IDCKT
- Part No.:
- INA290A1IDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
INA290A1IDCKT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:691
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Product details
Overview
INA290A1IDCKT from Texas Instruments is a single-channel, high-side current-sense amplifier with 20 V/V fixed gain, 2.7 V to 120 V common-mode input range, ±12 µV max offset voltage, and 1.1 MHz bandwidth at 20 V/V gain. It enables ultra-precise DC and fast transient current monitoring in 48-V server power rails and active antenna systems.
For engineers reviewing the INA290A1IDCKT datasheet, INA290A1IDCKT pinout, INA290A1IDCKT application, or INA290A1IDCKT equivalent, this page delivers verified specifications, SC-70 package layout, real-world use cases in telecom and datacenter power, and two validated alternative parts for design flexibility.
Technical Context
The INA290A1IDCKT uses a transconductance architecture with current-feedback amplifier topology, enabling 20 µA typical input bias current even at 120 V common-mode voltage and restricting operation strictly to high-side sensing. Its zero-drift core achieves ±12 µV max offset and ±0.2 µV/°C drift over −40°C to +125°C.
It delivers 160 dB DC CMRR and 85 dB AC CMRR at 50 kHz, supporting accurate current measurement under noisy high-voltage bus conditions. The 2 V/µs slew rate and 9 µs settling time (to 0.5%) enable reliable overcurrent detection in fast-switching 48-V power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20 V/V - fixed internal ratio; enables 50-mV full-scale sense voltage for 1-A current with 50-mΩ shunt |
| Common-Mode Range | 2.7 V to 120 V - supports direct connection to 48-V and 12-V bus rails without level-shifting |
| Offset Voltage | ±12 µV max - allows sub-100-mA current resolution with 10-mΩ shunt at room temperature |
| Bandwidth | 1.1 MHz at 20 V/V - sufficient for detecting <1 µs overcurrent events in telecom RRU protection circuits |
| Quiescent Current | 370 µA per channel - enables always-on monitoring in low-power 48-V rack management systems |
| CMRR | 160 dB DC / 85 dB at 50 kHz - rejects bus noise in high-noise macro base station environments |
| Slew Rate | 2 V/µs - ensures faithful reproduction of fast current transients without distortion |
Pinout & Package
The INA290A1IDCKT is housed in a 5-pin SC-70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for space-constrained PCB layouts in telecom and server modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Amplified output | Delivers 20× sensed differential voltage; rail-to-rail swing up to VS − 0.2 V supports wide dynamic range ADC interfacing |
| GND (Pin 2) | Analog ground reference | Must be connected to clean system ground plane; separates signal return from power ground to minimize noise coupling |
| VS (Pin 3) | Positive supply | Accepts 2.7 V to 20 V; powers internal amplifier and output stage; decoupling capacitor required within 1 cm |
| IN+ (Pin 4) | High-side sense input | Connects to supply side of shunt resistor; common-mode voltage up to 120 V is supported |
| IN− (Pin 5) | Low-side sense input | Connects to load side of shunt; completes differential measurement path; must not be grounded externally |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low offset voltage | ±12 µV max enables accurate sub-ampere current sensing with low-value shunts (e.g., 5–10 mΩ), reducing I²R losses |
| High DC CMRR | 160 dB rejects common-mode noise from switching regulators and high-current traces, preserving measurement integrity |
| Wide common-mode operating range | 2.7 V to 120 V eliminates need for external level shifters or isolated amplifiers in 48-V and 12-V infrastructure |
| Zero-drift architecture | ±0.2 µV/°C offset drift maintains accuracy across −40°C to +125°C ambient, critical for outdoor telecom deployments |
| Fast transient response | 9 µs settling time to 0.5% supports real-time overcurrent protection in 5G remote radio units |
Applications
| 48-V Rack Server Power Monitoring | Macro Remote Radio Unit (RRU) |
|---|---|
Use Scenario: Real-time current monitoring of CPU/GPU VRMs and backplane distribution in 48-V datacenter servers. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting shunt voltage to scaled analog output for PMBus ADC or microcontroller sampling. Use Value: Enables precise power budgeting and fault logging with ±0.1% gain error and minimal thermal drift across rack temperature gradients. | Use Scenario: Fast overcurrent detection and reporting in outdoor macrocell RRUs powered from 48-V DC plant. IC Role / Device Role / Timing Role: High-bandwidth current monitor feeding protection logic to shut down PA stages within microseconds of fault onset. Use Value: 1.1 MHz bandwidth and 2 V/µs slew rate ensure no loss of transient fidelity during burst-mode transmission events. |
| Active Antenna System (AAS) | Test and Measurement Equipment |
Use Scenario: Per-channel current supervision in mMIMO active antenna arrays with distributed 48-V power feeds. IC Role / Device Role / Timing Role: Precision current sensor on each RF module's DC feed line, providing feedback to centralized thermal/power management MCU. Use Value: ±12 µV offset and 160 dB CMRR allow simultaneous monitoring of dozens of closely spaced channels without crosstalk-induced errors. | Use Scenario: Calibration-grade current measurement in benchtop power analyzers and programmable DC loads. IC Role / Device Role / Timing Role: Reference-grade sense amplifier in feedback loop of precision current sources/sinks. Use Value: 0.1% max gain error and 5 ppm/°C drift support NIST-traceable calibration across extended temperature ranges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA282A1IDR | Same 20 V/V gain, but wider supply range (2.7 V to 36 V); higher quiescent current (700 µA); 12-bit effective resolution vs. INA290A1IDCKT's 16-bit-equivalent precision | Preferred for industrial 24-V systems where supply exceeds 20 V; less suitable for battery-backed 48-V telecom where low IQ matters | Select INA282A1IDR only if VS > 20 V is required; otherwise INA290A1IDCKT offers superior offset and CMRR for telecom-grade accuracy |
| MAX40056ASA+ | 20 V/V gain; lower bandwidth (700 kHz); higher offset (±50 µV); integrated reference buffer; operates up to 100 V common-mode | Better suited for cost-sensitive industrial motor drives where 1.1 MHz bandwidth is unnecessary and reference buffering simplifies layout | Choose MAX40056ASA+ when reference integration reduces BOM count and 700 kHz suffices; avoid where 160 dB CMRR or sub-20-µV offset is mandatory |
Compared with INA282A1IDR and MAX40056ASA+, the INA290A1IDCKT provides the highest DC precision (±12 µV offset, 160 dB CMRR) and fastest response (1.1 MHz, 2 V/µs) in a 5-pin SC-70 footprint-making it optimal for 48-V telecom and high-density server current monitoring where accuracy and speed are non-negotiable.
Availability
INA290A1IDCKT is available at Aetrix Electronics and suitable for 48-V rack server power monitoring, macro remote radio unit (RRU) protection, and active antenna system (AAS) current supervision requiring stable component supply and long-term production continuity.
Supply support for INA290A1IDCKT 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 INA290 family was designed specifically for ultra-precise, high-common-mode current sensing in next-generation 48-V infrastructure-including telecom RRUs, datacenter servers, and active antenna systems-where offset, drift, and noise performance directly impact system reliability and efficiency.
FAQ
What is the maximum common-mode voltage the INA290A1IDCKT can withstand?
The INA290A1IDCKT supports an operational common-mode input range of 2.7 V to 120 V and a survival rating of −20 V to +122 V. This allows direct connection to 48-V and 12-V bus rails while surviving transient overvoltages common in telecom power systems. The device is strictly high-side only and does not support low-side sensing configurations.
Does the INA290A1IDCKT require external gain-setting resistors?
No, the INA290A1IDCKT features a factory-trimmed, fixed 20 V/V gain implemented via an internal precision resistor network. External resistors must not be added to modify gain, as TI explicitly warns that absolute resistor values vary significantly-even though ratios are tightly matched. The INA290A1IDCKT is intended for plug-and-play deployment with no external gain components.
What is the output voltage swing capability of the INA290A1IDCKT?
The INA290A1IDCKT delivers rail-to-rail output swing: minimum output is 0.005 V above ground and maximum is VS − 0.07 V (typical) at −40°C to +125°C with 10-kΩ load. This wide dynamic range preserves signal fidelity when interfacing with 12-bit or higher ADCs in 48-V server PMBus controllers and enables full utilization of ADC input range without external level shifting.
Can the INA290A1IDCKT be used in low-side current sensing applications?
No-the INA290A1IDCKT is architecturally restricted to high-side sensing only due to its transconductance current-feedback topology and internal biasing scheme. Its common-mode range starts at 2.7 V (not ground), and the IN− pin must connect to the load side of the shunt-not ground. For low-side sensing, TI recommends the INA199 or similar dedicated low-side amplifiers.
How does the INA290A1IDCKT handle ESD and ruggedness in harsh environments?
The INA290A1IDCKT is rated for ±2000 V HBM and ±1000 V CDM ESD per JEDEC standards, and its survival common-mode range of −20 V to +122 V provides robustness against bus transients in 48-V telecom plants. Combined with 160 dB CMRR and 85 dB AC CMRR at 50 kHz, it maintains accuracy even in electrically noisy macro RRU enclosures without additional filtering or shielding.
INA290A1IDCKT 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:
- 1.1 MHz
- Current - Input Bias:
- 20 µA
- Voltage - Input Offset:
- 5 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
INA290A1IDCKT FAQ
1.How can I place an order for INA290A1IDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA290A1IDCKT 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 INA290A1IDCKT reliable?
The price and inventory of INA290A1IDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA290A1IDCKT is usually 5 days.
3.What payment methods are accepted for INA290A1IDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA290A1IDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA290A1IDCKT?
INA290A1IDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA290A1IDCKT 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 INA290A1IDCKT?
For technical support, including INA290A1IDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA290A1IDCKT requirements.
6.How does Aetrix verify that INA290A1IDCKT is sourced from the original manufacturer or authorized distributors?
All INA290A1IDCKT 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 INA290A1IDCKT meets industry standards.
7.What is the process for return or replacement of INA290A1IDCKT?
All INA290A1IDCKT units undergo pre-shipment inspection (PSI). If there is an issue with INA290A1IDCKT, 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 INA290A1IDCKT part is unused and in its original packaging.
Return procedure for INA290A1IDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA290A1IDCKT Tags
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