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Texas Instruments INA2290A1IDGKT
- Part No.:
- INA2290A1IDGKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA2290A1IDGKT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:131
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Product details
Overview
INA2290A1IDGKT 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 input offset voltage (max), and 1.1-MHz bandwidth at 20 V/V gain - enabling accurate, high-speed current monitoring in telecom and server power systems.
For engineers reviewing the INA2290A1IDGKT datasheet, INA2290A1IDGKT pinout, INA2290A1IDGKT application, or INA2290A1IDGKT equivalent, key selection criteria include its 2.7–20-V supply range, 120-V common-mode capability, dual-channel isolation, and A1-gain (20 V/V) configuration optimized for low-VSENSE precision measurement in dense PCB layouts.
Technical Context
The INA2290A1IDGKT uses a transconductance architecture with current-feedback amplifiers to achieve 20 µA typical input bias current and 120-V common-mode operation - strictly limited to high-side sensing due to internal topology. Its zero-drift design ensures stable offset performance across −40°C to +125°C.
It features dual independent channels with matched gain (20 V/V), 160-dB DC CMRR, and 85-dB AC CMRR at 50 kHz. Channel separation exceeds 140 dB up to 100 kHz, supporting simultaneous high-accuracy measurements without crosstalk in multi-rail monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20 V/V - fixed internal resistor network; enables 50-mV full-scale VSENSE detection with 1-V output swing |
| Input Offset Voltage | ±12 µV (max) - supports sub-100-µA current resolution with 10-mΩ shunt at room temperature |
| Common-Mode Range | 2.7 V to 120 V - allows direct sensing on 48-V server rails and macro RRU bus lines without level-shifting |
| Bandwidth | 1.1 MHz (at G=20) - sufficient for fast overcurrent protection response within <1 µs rise time |
| Quiescent Current | 680 µA (typ) - dual-channel total; enables low-power always-on monitoring in thermal-constrained modules |
| CMRR | 160 dB DC / 85 dB @ 50 kHz - rejects noise from switching regulators and adjacent high-dV/dt traces |
| Slew Rate | 2 V/µs - maintains fidelity during transient load steps without output saturation |
Pinout & Package
The INA2290A1IDGKT is housed in an 8-pin VSSOP (DGK) package measuring 3.00 mm × 3.00 mm, with exposed thermal pad recommended for GND connection to enhance thermal performance in high-power density applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+1, IN+2 | Positive input (ch1, ch2) | Connect to high-side (bus-voltage) terminal of respective shunt resistor; referenced to VCM |
| IN−1, IN−2 | Negative input (ch1, ch2) | Connect to low-side (load) terminal of respective shunt resistor; defines sensed differential voltage |
| OUT1, OUT2 | Analog output (ch1, ch2) | Single-ended voltage output proportional to ISENSE × 20; rail-to-rail capable with 70-mV headroom to VS |
| VS | Power supply | 2.7–20-V single supply; powers both channels and sets output swing limits |
| GND | Ground reference | System ground return; thermal pad should be connected to GND plane for optimal θJA = 169.3°C/W |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low offset drift | ±0.2 µV/°C - ensures <1 µV total offset shift over −40°C to +125°C, critical for uncalibrated field deployments |
| High AC CMRR | 85 dB @ 50 kHz - suppresses PWM noise from adjacent buck converters in 48-V server PSUs |
| Dual-channel independence | Channel separation >140 dB @ 100 kHz - enables simultaneous monitoring of input and output rails without signal coupling |
| Low input bias current | 20 µA (typ) - minimizes error from shunt resistor self-heating and leakage in high-impedance sense paths |
| Wide supply range | 2.7–20 V - supports operation from Li-ion battery packs up to industrial 18-V rails without external LDO |
Applications
| Active Antenna System (AAS) | Macro Remote Radio Unit (RRU) |
|---|---|
Use Scenario: Real-time per-element RF power monitoring in mMIMO base stations with distributed amplifiers. IC Role / Device Role / Timing Role: Dual-channel high-side current sensor measuring PA bias current and DC feed current independently. Use Value: Enables closed-loop thermal derating using two synchronized, drift-stable measurements - eliminating need for system-level calibration across temperature. | Use Scenario: Input/output current supervision in outdoor macro RRU power modules operating at −40°C to +85°C ambient. IC Role / Device Role / Timing Role: High-common-mode (up to 120 V) dual-channel monitor for front-end DC-DC converter input and PA stage output rails. Use Value: 1.1-MHz bandwidth supports fast OCP triggering (<1 µs), while ±12 µV offset ensures <0.5% full-scale error at 1-A load with 10-mΩ shunt. |
| 48-V Rack Server PSU | 48-V Merchant Network Switch |
Use Scenario: Input current monitoring and phase-leg current balancing in multi-phase 48-V intermediate bus converters. IC Role / Device Role / Timing Role: Dual-channel current sense for input bulk capacitor charging current and per-phase inductor current feedback. Use Value: 160-dB DC CMRR rejects common-mode noise from synchronous rectifiers; 20-µA bias current avoids loading low-value shunts (<5 mΩ). | Use Scenario: Per-port PD (Power over Ethernet) current limiting and fault detection in 48-V backplane-fed switches. IC Role / Device Role / Timing Role: Dual-channel monitor for main 48-V supply rail and auxiliary 12-V management rail. Use Value: A1 gain (20 V/V) provides optimal SNR for 50-mV full-scale sensing; VSSOP package fits tight spacing between PoE controller and magnetics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA2290A2IDGKT | 50 V/V fixed gain; higher sensitivity but reduced dynamic range (20-mV full-scale VSENSE) | Better suited for lower-current rails (<2 A) where higher gain improves ADC utilization | Select when measuring sub-ampere loads with 100-mΩ shunts - avoid if VSENSE may exceed 20 mV |
| INA240A1IDR | Bi-directional sensing; 80-V max common-mode; 120-kHz bandwidth; ±150-µV offset | Supports bidirectional motor control and battery charge/discharge monitoring | Choose only for reverse-current detection needs; not suitable for 120-V telecom rails or >1-MHz response |
Compared with INA2290A2IDGKT and INA240A1IDR, the INA2290A1IDGKT uniquely balances 120-V common-mode tolerance, 1.1-MHz bandwidth, and ultra-low offset for unidirectional high-voltage power rail monitoring - making it optimal for 48-V/120-V telecom and server infrastructure where accuracy and speed coexist.
Availability
INA2290A1IDGKT is available at Aetrix Electronics and suitable for 48-V rack servers, macro remote radio units, and active antenna systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial deployment.
Supply support for INA2290A1IDGKT 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 delivering analog and embedded processing solutions, with deep expertise in precision signal chain and power management technologies.
The INA2290 series belongs to TI's ultra-precise current-sense amplifier product line, engineered specifically for high-common-mode, high-bandwidth, and low-drift current monitoring in telecom infrastructure, enterprise power systems, and industrial automation.
FAQ
What is the maximum common-mode voltage supported by the INA2290A1IDGKT?
The INA2290A1IDGKT supports a maximum common-mode input voltage of +120 V and a survival rating of +122 V. Its operational common-mode range is specified from 2.7 V to 120 V, enabling direct high-side sensing on 48-V and 120-V power rails without external level-shifting circuitry. This capability is validated across the full −40°C to +125°C temperature range.
Does the INA2290A1IDGKT support bidirectional current sensing?
No, the INA2290A1IDGKT is a high-side-only, unidirectional current-sense amplifier. Its internal architecture restricts operation to sensing current flow from the supply side toward the load. For bidirectional applications such as battery charge/discharge monitoring, alternative devices like the INA240A1IDR must be used - the INA2290A1IDGKT does not provide negative VSENSE capability or symmetric output swing about midsupply.
What is the quiescent current consumption of the INA2290A1IDGKT?
The INA2290A1IDGKT draws 680 µA typical quiescent current across both channels at TA = 25°C and VS = 5 V. Over the full operating temperature range (−40°C to +125°C), quiescent current remains below 900 µA. This low power draw supports always-on monitoring in thermally constrained telecom modules and energy-sensitive server subsystems.
Can the INA2290A1IDGKT be used with a 3.3-V supply?
Yes, the INA2290A1IDGKT operates with a minimum supply voltage of 2.7 V, making 3.3-V operation fully supported. At VS = 3.3 V, the output swing is guaranteed from 5 mV above GND to within 70 mV of VS (i.e., up to 3.23 V), and all key specifications - including gain error, offset, and CMRR - remain valid per the datasheet's recommended operating conditions.
How does the gain option A1 differ from other variants in the INA2290 family?
The A1 suffix in INA2290A1IDGKT denotes a fixed gain of 20 V/V, optimized for applications requiring wide dynamic range and low VSENSE operation down to 50 mV full-scale. Compared to A2 (50 V/V), A3 (100 V/V), and higher-gain variants, the A1 version offers the highest bandwidth (1.1 MHz), lowest noise contribution, and greatest immunity to PCB layout-induced errors - making it ideal for precision 48-V server and telecom power monitoring.
INA2290A1IDGKT 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
INA2290A1IDGKT FAQ
1.How can I place an order for INA2290A1IDGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA2290A1IDGKT 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 INA2290A1IDGKT reliable?
The price and inventory of INA2290A1IDGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA2290A1IDGKT is usually 5 days.
3.What payment methods are accepted for INA2290A1IDGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA2290A1IDGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA2290A1IDGKT?
INA2290A1IDGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA2290A1IDGKT 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 INA2290A1IDGKT?
For technical support, including INA2290A1IDGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA2290A1IDGKT requirements.
6.How does Aetrix verify that INA2290A1IDGKT is sourced from the original manufacturer or authorized distributors?
All INA2290A1IDGKT 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 INA2290A1IDGKT meets industry standards.
7.What is the process for return or replacement of INA2290A1IDGKT?
All INA2290A1IDGKT units undergo pre-shipment inspection (PSI). If there is an issue with INA2290A1IDGKT, 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 INA2290A1IDGKT part is unused and in its original packaging.
Return procedure for INA2290A1IDGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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