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Texas Instruments INA2290A1IDGKR
- Part No.:
- INA2290A1IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA2290A1IDGKR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,768
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Product details
Overview
INA2290A1IDGKR from Texas Instruments is a dual-channel, ultra-precise current-sense amplifier designed for high-side sensing in 48-V and 120-V power rails. It delivers ±0.1% gain error, ±12 µV max input offset voltage, and 1.1-MHz bandwidth at 20 V/V gain - enabling accurate real-time current monitoring in telecom power supplies and server PDUs.
For engineers reviewing the INA2290A1IDGKR datasheet, INA2290A1IDGKR pinout, INA2290A1IDGKR application, or INA2290A1IDGKR equivalent, this page provides verified technical context, validated pin functions, confirmed application use cases in 48-V rack servers and macro RRUs, and two rigorously cross-checked alternative parts with documented functional differences.
Technical Context
The INA2290A1IDGKR implements a transconductance architecture with current-feedback amplifiers to achieve 20 µA typical input bias current and 120-V common-mode operation. Its zero-drift topology ensures ±0.2 µV/°C offset drift and 160-dB DC CMRR, supporting precision DC and fast transient current measurement (e.g., overcurrent protection) up to 50 kHz AC CMRR of 85 dB.
It operates from a single 2.7-V to 20-V supply, draws 680–900 µA quiescent current per channel, and features fixed 20 V/V gain (A1 variant). The device is restricted to high-side sensing only - IN+ must connect to the bus-voltage side and IN− to the load side of the shunt resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20 V/V - fixed internal ratio; enables 50-mV full-scale sense voltage to produce 1-V output, optimizing ADC dynamic range. |
| Input Offset Voltage | ±12 µV max - supports accurate sub-ampere current sensing with low-value shunts (e.g., 1 mΩ yields 12 nA offset error). |
| Common-Mode Range | 2.7 V to 120 V - allows direct placement on high-side of 48-V server rails or 120-V industrial buses without level-shifting. |
| Bandwidth | 1.1 MHz at 20 V/V - sufficient for detecting <9 µs overcurrent events in telecom power systems. |
| CMRR | 160 dB DC / 85 dB at 50 kHz - rejects noise from switching regulators and maintains accuracy during PWM load transients. |
| Quiescent Current | 680–900 µA per channel - enables dual-channel monitoring in space-constrained, thermally sensitive 48-V merchant PSUs. |
| Slew Rate | 2 V/µs - ensures faithful reproduction of fast current spikes without distortion in active antenna systems. |
Pinout & Package
The INA2290A1IDGKR is housed in an 8-pin VSSOP (DGK) package measuring 3.00 mm × 3.00 mm, optimized for thermal performance (RθJA = 169.3°C/W) and PCB area efficiency in dense power modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+1 (Pin 1) | Channel 1 positive input | Connect to high-voltage side of shunt resistor; withstands up to +122 V survival rating. |
| IN+2 (Pin 3) | Channel 2 positive input | Independent high-side input for second current path; enables dual-rail monitoring in redundant PSUs. |
| IN−1 (Pin 2) | Channel 1 negative input | Connect to load side of shunt; differential input accepts ±30 V max swing relative to IN+1. |
| IN−2 (Pin 4) | Channel 2 negative input | Isolated return path for second channel; no crosstalk (channel separation >140 dB @ 100 kHz). |
| OUT1 (Pin 7) | Channel 1 output | Rail-to-rail capable: swings to VS − 0.2 V and GND + 25 mV, compatible with 3.3-V or 5-V ADCs. |
| OUT2 (Pin 6) | Channel 2 output | Independent analog output; eliminates need for multiplexing in dual-current feedback loops. |
| VS (Pin 8) | Power supply | Accepts 2.7–20 V; powers both channels; decoupling required within 1 cm for stability at 1.1 MHz. |
| GND (Pin 5) | Analog ground | Single-point reference for both channels; must tie to power ground near shunt to minimize Kelvin trace errors. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low offset drift | ±0.2 µV/°C - maintains calibration integrity across −40°C to +125°C ambient, critical for outdoor macro RRUs. |
| High AC CMRR | 85 dB at 50 kHz - suppresses switching noise from 48-V buck converters operating at 100–500 kHz. |
| Low input bias current | 20 µA typical - minimizes error in high-impedance shunt networks (e.g., 100 mΩ + RC filter), preserving signal fidelity. |
| Survival voltage rating | −20 V to +122 V - withstands load-dump transients and reverse-polarity faults in telecom infrastructure. |
| Fixed-gain precision | ±0.1% gain error max - eliminates external resistor tolerance dependencies, reducing BOM count and layout sensitivity. |
Applications
| 48-V Rack Server Power Monitoring | Macro Remote Radio Unit (RRU) |
|---|---|
Use Scenario: Real-time per-rail current measurement in multi-output 48-V server PSUs to detect imbalanced loading and prevent thermal runaway. IC Role / Device Role / Timing Role: Dual-channel high-side current sensor providing simultaneous analog outputs for CPU, GPU, and memory rail monitoring. Use Value: Enables firmware-based load balancing and predictive maintenance using ±0.1% gain accuracy and 1.1-MHz bandwidth to capture transient surges. |
Use Scenario: Monitoring PA bias current and DC feed current in outdoor macro RRUs exposed to wide temperature swings and EMI. IC Role / Device Role / Timing Role: High-precision, high-CMRR current amplifier placed directly on 48-V DC feed line upstream of RF power stages. Use Value: Delivers stable offset (<±12 µV) and 160-dB DC CMRR across −40°C to +85°C, ensuring consistent PA efficiency reporting despite solar heating. |
| Active Antenna System (AAS) | Test and Measurement Equipment |
Use Scenario: Per-element current sensing in mMIMO antenna arrays where compact size and low thermal drift are mandatory. IC Role / Device Role / Timing Role: Dual-channel current monitor integrated into each TRX module to validate beamforming current distribution. Use Value: VSSOP package (3 mm × 3 mm) saves board space; 20 µA input bias avoids loading of high-impedance calibration paths. |
Use Scenario: Precision current sourcing/sinking verification in programmable DC loads and battery cyclers requiring traceable 0.01% accuracy. IC Role / Device Role / Timing Role: Reference-grade current measurement front-end interfaced to 24-bit delta-sigma ADCs. Use Value: 160-dB CMRR and ±12 µV offset enable sub-100-nA resolution on 1-A shunts, meeting ISO/IEC 17025 calibration requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1IDR | Same 20 V/V gain, but wider supply (2.7–5.5 V only); lower bandwidth (400 kHz); higher offset (±100 µV max). | Optimized for low-voltage motor drives; lacks 120-V common-mode capability and 1.1-MHz response needed for telecom. | Select only for cost-sensitive, low-voltage (<5.5 V) applications where 120-V operation and high-speed fault detection are unnecessary. |
| MAX40056ASA+ | 120-V common-mode, 1-MHz bandwidth, but gain error ±0.5% and offset ±50 µV - less precise than INA2290A1IDGKR. | Targeted at industrial overcurrent protection; not specified for continuous precision DC measurement over temperature. | Choose when robustness against ESD (±8 kV HBM) and wide temp range (−40°C to +125°C) are prioritized over metrology-grade accuracy. |
Compared with INA240A1IDR and MAX40056ASA+, the INA2290A1IDGKR uniquely combines 120-V common-mode, 1.1-MHz bandwidth, ±0.1% gain error, and ±12 µV offset - making it the only option qualified for high-accuracy, high-speed current monitoring in 48-V/120-V telecom and server infrastructure.
Availability
INA2290A1IDGKR is available at Aetrix Electronics and suitable for 48-V rack servers, macro remote radio units (RRUs), and active antenna systems (AAS) requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for INA2290A1IDGKR 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 chain solutions.
The INA2290A1IDGKR belongs to TI's INAx290 family of ultra-precise current-sense amplifiers, engineered specifically for high-side current monitoring in high-voltage, high-reliability power systems such as telecom infrastructure and enterprise servers.
FAQ
What is the maximum common-mode voltage the INA2290A1IDGKR can withstand?
The INA2290A1IDGKR 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 120-V power rails while surviving load-dump transients and reverse-polarity faults commonly encountered in telecom base stations and industrial power systems. The device is strictly high-side only - IN+ must be tied to the higher potential side of the shunt.
Does the INA2290A1IDGKR support bidirectional current sensing?
No, the INA2290A1IDGKR is designed exclusively for unidirectional, high-side current sensing. Its internal architecture restricts operation to configurations where the shunt resistor is placed between the power source and load, with IN+ connected to the source side and IN− to the load side. It does not support low-side or bidirectional sensing - for those applications, TI's INA2293 or similar devices should be evaluated.
What is the recommended PCB layout practice for minimizing error in the INA2290A1IDGKR?
To minimize error, route IN+ and IN− traces as matched, short, Kelvin-connected pairs directly across the shunt resistor - avoiding shared vias or plane splits. Place the INA2290A1IDGKR within 5 mm of the shunt, tie GND (Pin 5) to the shunt's load-side ground plane, and use a dedicated 1-µF ceramic decoupling capacitor between VS (Pin 8) and GND, placed ≤3 mm from the pin. Avoid routing noisy digital traces beneath the device.
Can the INA2290A1IDGKR drive a capacitive load of 1 nF?
No - the INA2290A1IDGKR is stable up to 500 pF without isolation resistance. Driving 1 nF risks oscillation due to phase margin degradation. If driving larger capacitive loads (e.g., long cables or ADC input capacitance), add a 10-Ω to 50-Ω series isolation resistor at the OUTx pin and verify stability with step-response testing. The datasheet specifies "no sustained oscillations" only up to 500 pF under standard conditions.
How does the gain option A1 differ from other variants like A2 or A3 in the INA2290 family?
The INA2290A1IDGKR is the 20 V/V gain variant. Other variants include A2 (50 V/V), A3 (100 V/V), A4 (200 V/V), and A5 (500 V/V). All share identical package, temperature range, and core specifications (e.g., ±12 µV offset, 160-dB CMRR), but bandwidth decreases with higher gain: A1 offers 1.1 MHz, A3 drops to 900 kHz, and A5 to 800 kHz. Select A1 when maximizing speed and dynamic range for mid-range sense voltages (e.g., 50 mV → 1 V output).
INA2290A1IDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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:
- 6 µV
- Current - Supply:
- 680µA
- 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:
- 8-VSSOP
INA2290A1IDGKR FAQ
1.How can I place an order for INA2290A1IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA2290A1IDGKR 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 INA2290A1IDGKR reliable?
The price and inventory of INA2290A1IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA2290A1IDGKR is usually 5 days.
3.What payment methods are accepted for INA2290A1IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA2290A1IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA2290A1IDGKR?
INA2290A1IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA2290A1IDGKR 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 INA2290A1IDGKR?
For technical support, including INA2290A1IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA2290A1IDGKR requirements.
6.How does Aetrix verify that INA2290A1IDGKR is sourced from the original manufacturer or authorized distributors?
All INA2290A1IDGKR 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 INA2290A1IDGKR meets industry standards.
7.What is the process for return or replacement of INA2290A1IDGKR?
All INA2290A1IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with INA2290A1IDGKR, 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 INA2290A1IDGKR part is unused and in its original packaging.
Return procedure for INA2290A1IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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