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Texas Instruments INA290A5IDCKT
- Part No.:
- INA290A5IDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
INA290A5IDCKT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:140
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Product details
Overview
INA290A5IDCKT from Texas Instruments is a single-channel, high-side current-sense amplifier with 500 V/V fixed gain, 2.7 V to 120 V common-mode input range, ±12 µV max offset voltage, and 800 kHz bandwidth (at A5 gain). It enables ultra-precise shunt-based current monitoring in 48-V server power rails and fast overcurrent protection circuits.
For engineers reviewing the INA290A5IDCKT datasheet, INA290A5IDCKT pinout, INA290A5IDCKT application, or INA290A5IDCKT equivalent, this page delivers verified specifications, SC-70 package layout, real-world use cases in telecom and datacenter power systems, and two validated alternative parts for design flexibility.
Technical Context
The INA290A5IDCKT 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 zero-drift input stage achieves ±0.15% max gain error and ±0.2 µV/°C offset drift across –40°C to +125°C.
It operates from a single 2.7 V to 20 V supply, draws 370–600 µA quiescent current, and delivers rail-to-rail output swing (VS – 0.2 V min, 0.025 V above GND) into 10 kΩ loads - optimized for interfacing directly with SAR ADCs or microcontroller analog inputs without external buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 500 V/V - scales 8 mV shunt drop to full-scale 4 V output, enabling precise low-current measurement with minimal I²R loss. |
| Common-mode range | 2.7 V to 120 V - supports direct sensing on 48-V and 12-V bus rails without level-shifting or attenuation networks. |
| Offset voltage | ±12 µV max - ensures <1 µA error in 100 mΩ shunt at 25°C, critical for sub-ampere load current accuracy. |
| Bandwidth | 800 kHz - provides <9 µs settling time for 0.5% accuracy, suitable for fast overcurrent detection in PSU protection loops. |
| CMRR | 160 dB DC / 85 dB @ 50 kHz - rejects noise from switching regulators and high-dv/dt bus transients in dense PCB layouts. |
| Supply current | 370 µA typ. per channel - allows integration into always-on monitoring paths without significant system power penalty. |
| Operating temp. | –40°C to +125°C - qualified for industrial and telecom equipment operating in uncontrolled ambient environments. |
Pinout & Package
INA290A5IDCKT is housed in a 5-pin SC-70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for space-constrained power management subsystems. Thermal pad is optional and may be left floating or connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Amplified output | Delivers 500×(IN+ − IN−); drives ADC input or comparator directly; rail-to-rail swing supports 3.3-V or 5-V logic interfaces. |
| GND (Pin 2) | Analog ground reference | Return path for internal circuitry; must connect to low-noise analog ground plane, separate from high-current power ground. |
| VS (Pin 3) | Positive supply | Accepts 2.7 V to 20 V; powers internal amplifier and output stage; decoupling capacitor required within 1 cm of pin. |
| IN+ (Pin 4) | High-side sense input | Connects to supply side of shunt resistor; withstands up to +122 V survival voltage; high-impedance node minimizes loading. |
| IN− (Pin 5) | Load-side sense input | Connects to load side of shunt; common-mode voltage referenced to this pin; differential input rejects bus ripple and noise. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low offset drift | ±0.2 µV/°C - maintains calibration stability across thermal cycling in rack-mounted servers without periodic recalibration. |
| High AC CMRR | 85 dB @ 50 kHz - suppresses PWM noise from adjacent buck converters, reducing need for additional filtering components. |
| Low input bias current | 20 µA typ. - enables accurate sensing with high-value shunts (>1 Ω) or low-current applications (<10 mA) without signal degradation. |
| Fast slew rate | 2 V/µs - preserves pulse fidelity during transient events like short-circuit detection, supporting response times under 10 µs. |
| Fixed precision gain | 500 V/V with ±0.15% max error - eliminates external gain-setting resistors, removing matching errors and board area for trimming networks. |
Applications
| 48-V Rack Server Monitoring | Macro Remote Radio Unit (RRU) |
|---|---|
Use Scenario: Real-time current monitoring of 48-V backplane distribution in hyperscale datacenter servers. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting shunt voltage to scaled analog output for ADC sampling at 100 kSPS. Use Value: Enables dynamic power budgeting and fault isolation with ±0.5% full-scale accuracy across temperature, reducing need for redundant sensors. |
Use Scenario: Load current supervision in outdoor macro-cell base station RF power amplifiers. IC Role / Device Role / Timing Role: Fast-response current monitor feeding protection logic that triggers shutdown within 10 µs of overcurrent event. Use Value: 800 kHz bandwidth and 2 V/µs slew rate ensure reliable detection of RF PA failure modes before thermal damage occurs. |
| Active Antenna System (AAS) | Test and Measurement Equipment |
Use Scenario: Per-channel current measurement in mMIMO antenna array power modules with tight thermal constraints. IC Role / Device Role / Timing Role: Precision current sensor interfaced to isolated SPI ADC, operating continuously at +85°C ambient. Use Value: ±12 µV offset and ±0.2 µV/°C drift maintain sub-mA accuracy over full temperature range, eliminating calibration drift in field-deployed units. |
Use Scenario: High-accuracy current sourcing/sinking verification in programmable DC electronic loads. IC Role / Device Role / Timing Role: Reference-grade sense element providing feedback to control loop with <10 ppm linearity error. Use Value: 160 dB DC CMRR rejects common-mode noise from switching power supplies, ensuring measurement integrity during dynamic load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A5IDR | Same 500 V/V gain, but wider common-mode range (–4 V to 80 V), higher quiescent current (1.8 mA), and SOIC-8 package. | Better suited for bidirectional sensing and lower-voltage industrial motor drives; less optimal for 48-V telecom rails due to reduced upper CM limit. | Select when bidirectional current measurement or PCB layout allows larger SOIC footprint and higher supply current is acceptable. |
| MAX40056ASA+ | 500 V/V gain, 2.7 V to 65 V CM range, 1.5 MHz bandwidth, but ±50 µV offset and no guaranteed 125°C operation. | Targeted at cost-sensitive test equipment where speed outweighs precision; not rated for continuous operation above +105°C. | Choose for benchtop instruments requiring faster response but tolerating higher offset and narrower temperature range. |
Compared with INA240A5IDR and MAX40056ASA+, the INA290A5IDCKT offers superior DC precision (±12 µV vs. ±50 µV), extended 120-V common-mode capability for next-gen 48-V architectures, and SC-70 packaging for ultra-dense power modules - making it the optimal choice for thermally demanding, high-accuracy telecom and datacenter applications.
Availability
INA290A5IDCKT is available at Aetrix Electronics and suitable for 48-V rack server monitoring, macro remote radio unit (RRU) protection, and active antenna system (AAS) current sensing requiring stable component supply and long-term production continuity.
Supply support for INA290A5IDCKT 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-bandwidth current sensing in high-voltage, high-reliability infrastructure applications - including telecom power systems, datacenter PSUs, and industrial motor controls.
FAQ
What is the maximum common-mode voltage the INA290A5IDCKT can withstand?
The INA290A5IDCKT has 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 up to +122 V without damage - a key requirement for telecom and server power systems where bus faults occur.
Does the INA290A5IDCKT support bidirectional current sensing?
No, the INA290A5IDCKT is a high-side-only current-sense amplifier with a topology restricted to unidirectional sensing. Its input structure requires IN− to be at or below IN+, and it cannot measure reverse current flow. For bidirectional applications, consider the INA240 series instead.
What is the typical output swing capability of the INA290A5IDCKT?
The INA290A5IDCKT delivers rail-to-rail output swing: minimum output is 0.025 V above GND and maximum is VS – 0.2 V at 10 kΩ load, across –40°C to +125°C. This ensures full utilization of 3.3-V or 5-V ADC input ranges without external level-shifting circuitry.
Can the INA290A5IDCKT drive capacitive loads directly?
The INA290A5IDCKT is stable driving up to 500 pF capacitive load without isolation resistors. For loads exceeding 500 pF - such as long PCB traces or ADC input capacitance - a small series resistor (10–50 Ω) between OUT and the load is recommended to maintain phase margin and prevent oscillation.
How does the gain option A5 map to the INA290A5IDCKT part number?
The "A5" suffix in INA290A5IDCKT explicitly denotes the 500 V/V fixed-gain variant. TI's INAx290 family uses A1–A5 suffixes to indicate gain: A1 = 20 V/V, A2 = 50 V/V, A3 = 100 V/V, A4 = 200 V/V, and A5 = 500 V/V. This eliminates ambiguity in design-in and procurement.
INA290A5IDCKT 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:
- 800 kHz
- Current - Input Bias:
- 20 µA
- Voltage - Input Offset:
- 2 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
INA290A5IDCKT FAQ
1.How can I place an order for INA290A5IDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA290A5IDCKT 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 INA290A5IDCKT reliable?
The price and inventory of INA290A5IDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA290A5IDCKT is usually 5 days.
3.What payment methods are accepted for INA290A5IDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA290A5IDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA290A5IDCKT?
INA290A5IDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA290A5IDCKT 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 INA290A5IDCKT?
For technical support, including INA290A5IDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA290A5IDCKT requirements.
6.How does Aetrix verify that INA290A5IDCKT is sourced from the original manufacturer or authorized distributors?
All INA290A5IDCKT 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 INA290A5IDCKT meets industry standards.
7.What is the process for return or replacement of INA290A5IDCKT?
All INA290A5IDCKT units undergo pre-shipment inspection (PSI). If there is an issue with INA290A5IDCKT, 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 INA290A5IDCKT part is unused and in its original packaging.
Return procedure for INA290A5IDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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