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Texas Instruments INA4290A3IRGVT
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- Part No.:
- INA4290A3IRGVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
INA4290A3IRGVT.pdf
- Description:
- IC CURR SENSE 4 CIRCUIT 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:166
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Product details
Overview
INA4290A3IRGVT from Texas Instruments is a quad-channel, ultra-precise current-sense amplifier designed for high-side sensing in 48-V and 120-V power rails. It delivers ±12 µV max offset voltage, ±0.1% max gain error, 100 V/V fixed gain, and 900 kHz bandwidth (at 100 V/V), enabling accurate low-current measurement in telecom and server power monitoring.
For engineers reviewing the INA4290A3IRGVT datasheet, INA4290A3IRGVT pinout, INA4290A3IRGVT application, or INA4290A3IRGVT equivalent, this page provides verified specifications, package mapping, channel-isolated pin functions, real-world use cases in 48-V rack servers and mMIMO systems, and two validated alternative parts with documented technical differences.
Technical Context
The INA4290A3IRGVT uses a transconductance architecture with current-feedback amplifiers to achieve 20 µA typical input bias current and operation up to 120 V common-mode voltage. Its zero-drift topology ensures stable offset performance across –40°C to +125°C, supporting precision shunt-based current sensing without external calibration.
It is strictly a high-side-only current-sense amplifier - not bidirectional - with differential inputs per channel (IN+, IN–) and rail-to-rail capable outputs. Channel separation exceeds 140 dB at 10 kHz, minimizing crosstalk in quad-channel monitoring of independent 48-V power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V - fixed internal resistor ratio enables direct voltage output scaling: 1 mV sense drop → 100 mV output, simplifying ADC interface design. |
| Offset Voltage (max) | ±12 µV - allows accurate sensing down to ~120 nA across 100 mΩ shunt at room temperature, critical for low-load standby monitoring. |
| Gain Error (max) | ±0.1% - reduces full-scale current measurement uncertainty to <0.1%, eliminating need for per-unit gain trimming in production test. |
| Bandwidth | 900 kHz - supports fast overcurrent detection (<1 µs response) in 48-V server VRMs and active antenna protection circuits. |
| Common-Mode Range | 2.7 V to 120 V - enables direct sensing on 48-V bus, 54-V PoE++, and 110-V industrial DC distribution without level-shifting. |
| Quiescent Current | 1.25 mA (typical, per device) - four channels draw only ~312 µA/channel, minimizing self-heating impact on shunt accuracy. |
| CMRR (DC) | 160 dB - rejects >99.9999% of common-mode noise from switching regulators, ensuring clean current signals in noisy 48-V server environments. |
Pinout & Package
The INA4290A3IRGVT is housed in a 4 mm × 4 mm, 16-pin QFN package (RGV) with exposed thermal pad. This RoHS-compliant, leadless package supports automated optical inspection and offers low thermal resistance (RθJA = 45.9°C/W) for sustained 4-channel operation at +125°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+1, IN+2, IN+3, IN+4 | Positive input (x4) | Connect to high-side (bus-voltage) terminal of respective shunt resistor; referenced to VCM, not GND. |
| IN−1, IN−2, IN−3, IN−4 | Negative input (x4) | Connect to low-side (load) terminal of respective shunt; defines sensed differential voltage VSENSE = IN+ − IN−. |
| OUT1–OUT4 | Analog output (x4) | Voltage output = Gain × VSENSE; rail-to-rail swing supports 0.005 V to VS − 0.07 V range into 10 kΩ load. |
| VS (pins 14, 15) | Power supply | Single 2.7–20 V supply powering all four channels; must be decoupled locally with ≥1 µF ceramic capacitor. |
| GND (pins 6, 7) | Ground reference | Low-impedance analog ground return; thermal pad may be left floating or connected to GND for improved thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low offset drift | ±0.2 µV/°C - maintains <1 µV total offset shift across –40°C to +125°C, enabling uncalibrated operation in outdoor telecom gear. |
| High AC CMRR | 85 dB at 50 kHz - suppresses high-frequency switching noise from GaN FETs in 48-V server PDNs, preserving signal integrity. |
| Channel isolation | ≥140 dB crosstalk rejection at 10 kHz - permits simultaneous monitoring of four independent 48-V rails (e.g., CPU, GPU, memory, I/O) without interference. |
| Low input bias current | 20 µA (typical) - minimizes voltage error across high-value shunts (>1 Ω), enabling precision sensing in low-current bias supplies. |
| Fast slew rate | 2 V/µs - ensures faithful reproduction of transient current events (e.g., CPU burst loads), critical for dynamic power management. |
Applications
| 48-V Rack Server Power Monitoring | Active Antenna System (mMIMO) |
|---|---|
Use Scenario: Real-time current monitoring of four independent 48-V power domains (CPU, GPU, memory, fan control) in hyperscale data center servers. IC Role / Device Role / Timing Role: Quad-channel high-side current-sense amplifier providing isolated analog outputs for simultaneous ADC sampling. Use Value: Enables per-rail power budgeting and thermal derating without adding four discrete amplifiers or layout area; 900 kHz bandwidth captures load transients during AI inference bursts. |
Use Scenario: Per-channel RF power amplifier current sensing in 64T64R mMIMO base station radios operating at 3.5 GHz. IC Role / Device Role / Timing Role: High-accuracy, high-CMRR current monitor for detecting PA overcurrent before thermal shutdown. Use Value: ±12 µV offset allows detection of <100 mA fault currents across 10 mΩ shunts, improving system uptime and reducing false alarms vs. lower-precision alternatives. |
| Macro Remote Radio Unit (RRU) | 48-V Merchant Network Switch PSU |
Use Scenario: Input and output current supervision in outdoor macro RRU power supplies handling wide temperature swings (–40°C to +85°C). IC Role / Device Role / Timing Role: Quad-channel current sensor feeding FPGA-based protection logic with <1 µs response latency. Use Value: Zero-drift architecture eliminates need for periodic offset recalibration; 120 V survival rating withstands lightning-induced surges on remote tower feeds. |
Use Scenario: Secondary-side current monitoring in multi-phase 48-V output DC/DC converters for enterprise network switches. IC Role / Device Role / Timing Role: Precision current feedback for digital power controllers managing phase shedding and efficiency optimization. Use Value: ±0.1% gain error ensures consistent current reporting across all phases, enabling accurate load balancing and predictive maintenance analytics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA4290A2IRGVT | 50 V/V gain (vs. 100 V/V); same offset (±12 µV), bandwidth (1100 kHz), and package. | Better suited for higher VSENSE ranges (e.g., ≥2 mV), trading output resolution for improved noise immunity in electrically noisy RRU enclosures. | Select when sensing across larger shunts (>20 mΩ) or where higher output swing margin is needed before ADC saturation. |
| INA4290A4IRGVT | 200 V/V gain (vs. 100 V/V); bandwidth reduced to 850 kHz; same offset and quiescent current. | Optimized for ultra-low-current detection (e.g., <50 mA) in always-on management controllers, with tighter output resolution at expense of transient response speed. | Select when measuring standby currents in 48-V OCP circuits where sub-100 nA resolution is required and bandwidth >850 kHz is sufficient. |
Compared with INA4290A2IRGVT and INA4290A4IRGVT, the INA4290A3IRGVT strikes the optimal balance for 48-V server and mMIMO applications: its 100 V/V gain maximizes ADC utilization for typical 0.5–2 mV sense voltages, while retaining 900 kHz bandwidth for fast fault detection - neither over-resolving nor under-resolving system requirements.
Availability
INA4290A3IRGVT is available at Aetrix Electronics and suitable for 48-V rack server power monitoring, active antenna system (mMIMO) current sensing, and macro remote radio unit (RRU) protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for INA4290A3IRGVT 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 INAx290 family - including INA4290A3IRGVT - was engineered specifically for high-accuracy, high-voltage current sensing in next-generation 48-V infrastructure, addressing the demand for reliable, calibrated-free monitoring in telecom, datacenter, and industrial power systems.
FAQ
What is the maximum common-mode voltage the INA4290A3IRGVT can withstand during normal operation?
The INA4290A3IRGVT operates with a common-mode input range of 2.7 V to 120 V under recommended conditions. Its survival rating extends to −20 V to +122 V, allowing tolerance of brief transients such as load-dump spikes in 48-V telecom systems. Operation below 2.7 V is not guaranteed and requires external biasing per Figure 7-1 in the datasheet.
Does the INA4290A3IRGVT support bidirectional current sensing?
No, the INA4290A3IRGVT is a high-side-only current-sense amplifier. Its internal topology restricts operation to sensing current flow from the supply side (IN+) to the load side (IN−) of the shunt resistor. It cannot measure reverse current or operate with the shunt placed on the low-side (ground-return path) without violating input voltage limits.
What is the thermal pad connection recommendation for the INA4290A3IRGVT QFN package?
The thermal pad on the INA4290A3IRGVT (RGV package) may be left electrically floating or connected to GND. TI documentation states either option is acceptable; connecting to GND improves thermal dissipation (reducing RθJA) and provides a low-impedance ground path for noise suppression, especially beneficial in multi-channel 48-V monitoring layouts.
How does the bandwidth of the INA4290A3IRGVT change with output voltage swing?
Per Figure 7-2 in the datasheet, the INA4290A3IRGVT's bandwidth increases with higher output voltage swing - reaching up to 900 kHz at full-scale output. At lower output levels (e.g., 1 V), bandwidth remains stable near spec; however, small-signal step response shows <9 µs settling to 0.5%, confirming suitability for fast overcurrent detection in server VRMs.
Can multiple INA4290A3IRGVT devices be used on the same PCB without crosstalk concerns?
Yes - each INA4290A3IRGVT integrates four fully isolated channels with ≥140 dB channel separation at 10 kHz (Figure 6-44). When using multiple quad devices on one board, maintain standard analog layout practices (separate ground pours, guard traces, local decoupling), and the inherent crosstalk performance ensures independent, accurate measurement across all 8+ channels.
INA4290A3IRGVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 4
- 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:
- 1.25mA (x4 Channels)
- 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:
- 16-VQFN (4x4)
INA4290A3IRGVT FAQ
1.How can I place an order for INA4290A3IRGVT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA4290A3IRGVT 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 INA4290A3IRGVT reliable?
The price and inventory of INA4290A3IRGVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA4290A3IRGVT is usually 5 days.
3.What payment methods are accepted for INA4290A3IRGVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA4290A3IRGVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA4290A3IRGVT?
INA4290A3IRGVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA4290A3IRGVT 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 INA4290A3IRGVT?
For technical support, including INA4290A3IRGVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA4290A3IRGVT requirements.
6.How does Aetrix verify that INA4290A3IRGVT is sourced from the original manufacturer or authorized distributors?
All INA4290A3IRGVT 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 INA4290A3IRGVT meets industry standards.
7.What is the process for return or replacement of INA4290A3IRGVT?
All INA4290A3IRGVT units undergo pre-shipment inspection (PSI). If there is an issue with INA4290A3IRGVT, 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 INA4290A3IRGVT part is unused and in its original packaging.
Return procedure for INA4290A3IRGVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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