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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Texas Instruments INA290A3IDCKT

Name: INA290A3IDCKT
Brand: Texas Instruments
SKU: INA290A3IDCKT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: INA290A3IDCKT

Manufacturer:: Texas Instruments

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: INA290A3IDCKT.pdf

Description:: IC CURR SENSE 1 CIRCUIT SC70-5

Quantity:: RFQ Add To RFQ list

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Product details

Overview

INA290A3IDCKT from Texas Instruments is a single-channel, high-side current-sense amplifier with 100 V/V fixed gain, 1.1-MHz bandwidth, ±12 µV max offset voltage, and 160-dB DC CMRR - designed for precision shunt-based current monitoring in 48-V server power rails and telecom RRU systems.

For engineers reviewing the INA290A3IDCKT datasheet, INA290A3IDCKT pinout, INA290A3IDCKT application, or INA290A3IDCKT equivalent, this ultra-precise amplifier delivers verified performance in high-common-mode, fast-response current sensing - especially where low drift (±0.2 µV/°C), wide V_CM (2.7 V to 120 V), and minimal quiescent current (370 µA) are critical selection criteria.

Technical Context

The INA290A3IDCKT 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 to high-side sensing only. Its zero-drift input stage ensures stable offset behavior across −40°C to +125°C.

Gain is internally fixed at 100 V/V via laser-trimmed resistor networks (10 kΩ/1000 kΩ), eliminating external gain-setting components. Bandwidth is gain-dependent: 900 kHz at A3 gain (100 V/V) with 5-pF load, supporting fast overcurrent detection in 48-V infrastructure applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Gain	100 V/V - fixed internal ratio enables predictable output scaling without external resistors; supports 40-mV full-scale input for 4-V output swing.
Input Offset Voltage	±12 µV (max) - enables accurate sub-ampere current measurement with low-value shunts (e.g., 1 mΩ yields 12 nA offset error).
Offset Drift	±0.2 µV/°C (max) - ensures <1 µV total drift over −40°C to +125°C, critical for thermal-stable power rail monitoring.
Common-Mode Range	2.7 V to 120 V - supports direct sensing on 48-V and 12-V bus rails, including transient survival up to +122 V.
Bandwidth	900 kHz - sufficient for detecting >1-µs overcurrent events in server VRMs and macro RRU protection circuits.
Quiescent Current	370 µA (typ) - allows integration into always-on monitoring paths without significant standby power penalty.
CMRR	160 dB DC / 85 dB at 50 kHz - rejects bus noise in noisy telecom and datacenter environments with minimal signal corruption.

Pinout & Package

INA290A3IDCKT is housed in a 5-pin SC-70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for space-constrained power management PCBs.

Pin/Terminal	Circuit Role	Design Meaning
OUT (Pin 1)	Amplified output	Delivers 100×(V_IN+ − V_IN−) voltage; rail-to-rail swing (VS − 0.2 V min) supports direct ADC interfacing.
GND (Pin 2)	Analog ground reference	Must connect to system power ground plane; serves as return path for internal bias and output stage.
VS (Pin 3)	Positive supply input	Accepts 2.7 V to 20 V; powers internal amplifiers and output buffer; independent of common-mode voltage.
IN+ (Pin 4)	High-side sense input	Connects to supply side of shunt resistor; referenced to V_CM; handles up to +122 V transient.
IN− (Pin 5)	Load-side sense input	Connects to load side of shunt; defines common-mode node; must remain within −20 V to +122 V absolute rating.

Key Features

Feature	Design Value
Ultra-low offset drift	±0.2 µV/°C enables <1 µV total drift over full temperature range - eliminates recalibration in industrial base stations.
High AC CMRR	85 dB at 50 kHz suppresses switching noise from adjacent buck converters in 48-V server PSUs.
Low input bias current	20 µA typical at 120 V V_CM minimizes error in high-impedance shunt networks (e.g., 100 mΩ + RC filter).
Fast slew rate	2 V/µs supports clean step response for overcurrent fault detection within 5 µs (1% settling).
Wide supply range	2.7 V to 20 V operation allows use with 3.3-V microcontrollers or 12-V auxiliary rails without level-shifting.

Applications

48-V Rack Server Power 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 PMBus ADC sampling. Use Value: ±0.1% gain error and ±12 µV offset enable ±0.5-A accuracy at 100-A full scale using 1-mΩ shunt, reducing power loss vs. higher-resistance alternatives.	Use Scenario: Protection and efficiency optimization in outdoor macro-cell base station power amplifiers. IC Role / Device Role / Timing Role: Fast-response current monitor feeding FPGA-based overcurrent logic with 900-kHz bandwidth. Use Value: 2-V/µs slew rate and 5-µs 1% settling time allow detection of 10-µs fault transients before PA damage occurs.
Active Antenna System (AAS)	Test and Measurement Equipment
Use Scenario: Per-channel current feedback in mMIMO active antenna arrays with distributed 48-V supplies. IC Role / Device Role / Timing Role: Precision current sensor providing real-time load telemetry to beamforming controller via analog interface. Use Value: 160-dB DC CMRR rejects coupled RF noise from adjacent TRX modules, preserving measurement integrity in dense RF environments.	Use Scenario: Calibration-grade current measurement in programmable DC electronic loads and source-measure units. IC Role / Device Role / Timing Role: Reference-grade sense amplifier in closed-loop current control path with <1-ppm/°C effective gain stability. Use Value: ±5 ppm/°C gain drift and ±0.1% gain error support NIST-traceable calibration without frequent re-zeroing.

48-V Rack Server Power 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 PMBus ADC sampling.

Use Value: ±0.1% gain error and ±12 µV offset enable ±0.5-A accuracy at 100-A full scale using 1-mΩ shunt, reducing power loss vs. higher-resistance alternatives.

Use Scenario: Protection and efficiency optimization in outdoor macro-cell base station power amplifiers.

IC Role / Device Role / Timing Role: Fast-response current monitor feeding FPGA-based overcurrent logic with 900-kHz bandwidth.

Use Value: 2-V/µs slew rate and 5-µs 1% settling time allow detection of 10-µs fault transients before PA damage occurs.

Active Antenna System (AAS)

Test and Measurement Equipment

Use Scenario: Per-channel current feedback in mMIMO active antenna arrays with distributed 48-V supplies.

IC Role / Device Role / Timing Role: Precision current sensor providing real-time load telemetry to beamforming controller via analog interface.

Use Value: 160-dB DC CMRR rejects coupled RF noise from adjacent TRX modules, preserving measurement integrity in dense RF environments.

Use Scenario: Calibration-grade current measurement in programmable DC electronic loads and source-measure units.

IC Role / Device Role / Timing Role: Reference-grade sense amplifier in closed-loop current control path with <1-ppm/°C effective gain stability.

Use Value: ±5 ppm/°C gain drift and ±0.1% gain error support NIST-traceable calibration without frequent re-zeroing.

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-sense amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
INA240A3IDR	Same 100 V/V gain, but wider V_CM (−4 V to 80 V), lower bandwidth (400 kHz), higher offset (±20 µV max).	Better suited for bidirectional sensing and lower-speed industrial motor drives; not rated for 120-V operation.	Select when bidirectional capability or cost sensitivity outweighs need for 120-V survivability and 900-kHz response.
MAX40056ASA+T	100 V/V gain, 1.5-MHz bandwidth, ±50 µV offset, 2.7–5.5 V supply only, no 120-V survival rating.	Optimized for low-voltage, high-speed applications like battery protection ICs; lacks extended common-mode range.	Choose for compact 3.3-V systems requiring faster response than INA290A3IDCKT, accepting higher offset and reduced V_CM.

Compared with INA240A3IDR and MAX40056ASA+T, the INA290A3IDCKT uniquely combines 120-V common-mode survivability, 900-kHz bandwidth, and ±12 µV offset - making it the only option qualified for precision 48-V telecom infrastructure monitoring where all three parameters are simultaneously required.

Availability

INA290A3IDCKT 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 telemetry requiring stable component supply and long-term production continuity.

Supply support for INA290A3IDCKT 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 engineered specifically for high-accuracy, high-common-mode current sensing in next-generation 48-V datacenter and telecom infrastructure - emphasizing ultra-low drift, robust ESD tolerance, and SC-70 space efficiency.

FAQ

What is the maximum common-mode voltage the INA290A3IDCKT can withstand?

The INA290A3IDCKT supports an operational common-mode input range of 2.7 V to 120 V and survives transients up to −20 V and +122 V. This makes it suitable for direct connection to 48-V and 12-V bus rails with margin for surge events, unlike many competing amplifiers rated only to 80 V.

Does the INA290A3IDCKT support bidirectional current sensing?

No - the INA290A3IDCKT is a high-side-only current-sense amplifier with topology restricted to unidirectional sensing. Its input stage requires V_IN+ ≥ V_IN−, and it cannot accurately measure reverse current flow. For bidirectional applications, consider the INA240 series instead.

What is the typical quiescent current of the INA290A3IDCKT at 5 V supply?

The INA290A3IDCKT draws 370 µA typical quiescent current at 5 V supply and 25°C, rising to 600 µA maximum across −40°C to +125°C. This low power consumption enables deployment in always-on monitoring circuits without impacting system standby efficiency.

Can the INA290A3IDCKT drive a 10-kΩ load directly?

Yes - the INA290A3IDCKT is specified to drive loads down to 10 kΩ while maintaining rail-to-rail output swing (VS − 0.2 V min, GND + 25 mV max) across temperature. It remains stable with capacitive loads up to 500 pF, supporting direct connection to SAR ADC inputs without buffering.

How does the gain option A3 map to the INA290A3IDCKT part number?

The "A3" suffix in INA290A3IDCKT explicitly denotes the 100 V/V fixed-gain variant. Texas Instruments uses A1–A5 to designate gain options: A1 = 20 V/V, A2 = 50 V/V, A3 = 100 V/V, A4 = 200 V/V, A5 = 500 V/V. The internal resistor network is laser-trimmed and non-adjustable.

INA290A3IDCKT 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:: 900 kHz

Current - Input Bias:: 20 µA

Voltage - Input Offset:: 3 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

INA290A3IDCKT FAQ

1.How can I place an order for INA290A3IDCKT through Aetrix?

Please submit a Request for Quotation (RFQ) for INA290A3IDCKT 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 INA290A3IDCKT reliable?

The price and inventory of INA290A3IDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA290A3IDCKT is usually 5 days.

3.What payment methods are accepted for INA290A3IDCKT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA290A3IDCKT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for INA290A3IDCKT?

INA290A3IDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your INA290A3IDCKT 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 INA290A3IDCKT?

For technical support, including INA290A3IDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA290A3IDCKT requirements.

6.How does Aetrix verify that INA290A3IDCKT is sourced from the original manufacturer or authorized distributors?

All INA290A3IDCKT 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 INA290A3IDCKT meets industry standards.

7.What is the process for return or replacement of INA290A3IDCKT?

All INA290A3IDCKT units undergo pre-shipment inspection (PSI). If there is an issue with INA290A3IDCKT, 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 INA290A3IDCKT part is unused and in its original packaging.

Return procedure for INA290A3IDCKT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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