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Texas Instruments INA4290A2IRGVT
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- Part No.:
- INA4290A2IRGVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
INA4290A2IRGVT.pdf
- Description:
- IC CURR SENSE 4 CIRCUIT 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:205
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Product details
Overview
INA4290A2IRGVT from Texas Instruments is a quad-channel, high-side current-sense amplifier optimized for precision 48-V and 120-V power rail monitoring in server, telecom, and industrial systems. It delivers ±0.1% gain error, ±12 µV max input offset voltage, 1.1-MHz bandwidth at 50 V/V gain, and operates across –40°C to +125°C with 2.7-V to 20-V supply.
For engineers reviewing the INA4290A2IRGVT datasheet, INA4290A2IRGVT pinout, INA4290A2IRGVT application, or INA4290A2IRGVT equivalent, this page provides verified specifications, validated package mapping, confirmed quad-channel pin functions, real-world use cases in 48-V rack servers and mMIMO active antenna systems, and two technically documented alternative parts.
Technical Context
The INA4290A2IRGVT uses a transconductance architecture with current-feedback amplification to achieve ultra-low input bias current (20 µA typ) while sustaining 120-V common-mode operation. Its zero-drift topology ensures ±0.2 µV/°C offset drift and 160-dB DC CMRR - critical for rejecting bus noise in high-voltage, high-precision sensing.
As a fixed-gain, high-side-only device, it supports only unidirectional current measurement with dedicated IN+ and IN– inputs per channel. The A2 variant's 50 V/V gain enables accurate detection of sub-10-mV sense voltages across shunts as low as 1 mΩ, without external gain adjustment or calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V - fixed internal ratio; enables 20-mV full-scale output for 400-µA sensed current through 1-mΩ shunt. |
| Input Offset Voltage | ±12 µV max - allows accurate measurement of ≤10-mV differential signals even at 125°C ambient. |
| Common-Mode Range | 2.7 V to 120 V - supports direct sensing on 48-V server rails and macro RRU power buses without level-shifting. |
| Bandwidth | 1.1 MHz at 50 V/V - sufficient for fast overcurrent protection response (<9 µs settling to 0.5%) in telecom power stages. |
| Quiescent Current | 1.25 mA per channel (1.6 mA max) - total 5 mA typical for all four channels; enables low-power always-on monitoring. |
| CMRR | 160 dB DC / 85 dB at 50 kHz - rejects ripple and switching noise from adjacent buck converters in dense PCB layouts. |
| Supply Range | 2.7 V to 20 V - compatible with standard 3.3-V, 5-V, or 12-V bias rails; output swings to within 70 mV of VS. |
Pinout & Package
The INA4290A2IRGVT is housed in a 4 mm × 4 mm, 16-pin QFN package (RGV) with exposed thermal pad. Pin numbering follows TI-standard top-view orientation; thermal pad may be left floating or connected to GND for improved thermal performance.
| 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. |
| IN–1, IN–2, IN–3, IN–4 | Negative input (x4) | Connect to low-side (load) terminal of respective shunt resistor; defines current direction and reference point. |
| OUT1–OUT4 | Analog output (x4) | Voltage = 50 × (IN+ − IN−); rail-to-rail capable with 70-mV headroom to VS and 25-mV to GND. |
| VS (pins 14, 15) | Power supply | Single 2.7–20-V supply; dual pins reduce IR drop and improve PSRR under dynamic load. |
| GND (pins 6, 7) | Ground reference | Dual ground pins minimize ground bounce between channels; must connect to low-impedance system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-channel integration | Four independent 50 V/V amplifiers in one 4×4-mm QFN - reduces board area by >75% vs discrete solutions for multi-rail 48-V systems. |
| Zero-drift architecture | ±0.2 µV/°C offset drift - maintains accuracy across –40°C to +125°C without recalibration in outdoor telecom enclosures. |
| High AC CMRR (85 dB @ 50 kHz) | Rejects high-frequency switching noise from adjacent 500-kHz–1-MHz DC/DC converters in server VRMs. |
| Low input bias current (20 µA) | Minimizes error in high-value shunts (>10 mΩ); enables precise sensing of <1-A currents without signal degradation. |
| Channel separation >140 dB @ 100 kHz | Prevents crosstalk between monitored rails (e.g., CPU, memory, PCIe) in multi-output power supplies. |
Applications
| 48-V Rack Server Power Monitoring | Active Antenna System (mMIMO) |
|---|---|
|
Use Scenario: Real-time current monitoring of individual 48-V distribution rails feeding FPGA, ASIC, and RF front-end modules. IC Role / Device Role / Timing Role: Quad-channel high-side current sense amplifier providing simultaneous analog outputs for four independent power domains. Use Value: Enables per-rail fault detection with <10-mA resolution using 1-mΩ shunts, reducing power loss by 90% vs 10-mΩ alternatives. |
Use Scenario: Precise current feedback for beamforming power amplifiers in 5G mMIMO base stations operating at ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: High-bandwidth (1.1 MHz), low-drift current sensor for closed-loop PA bias control and thermal derating. Use Value: Maintains ±0.1% gain accuracy across temperature, ensuring consistent EVM and ACLR performance despite thermal cycling. |
| Macro Remote Radio Unit (RRU) | 48-V Merchant Network Power Supply |
|
Use Scenario: Input and output current supervision in outdoor macro RRUs powered from centralized 48-V DC plants with long cable runs. IC Role / Device Role / Timing Role: High-common-mode (120-V survival) current monitor for input fuse health and PA stage efficiency tracking. Use Value: Survives cable surge transients up to ±122 V while delivering stable 50-V/V gain - eliminates need for external TVS/clamping networks. |
Use Scenario: Multi-phase current balancing and phase-loss detection in modular 48-V merchant switch power supplies with hot-swap capability. IC Role / Device Role / Timing Role: Four-channel analog current readout for digital controller (e.g., PMBus MCU) with synchronized sampling via shared VS/GND references. Use Value: Channel-to-channel matching <0.05% gain error enables accurate current summation and imbalance alarms below ±2% threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA4290A1IRGVT | 20 V/V gain; ±25 µV max offset; 1.1-MHz BW; same package and pinout. | Better suited for higher-current, lower-resolution applications where 100-mV full-scale output is acceptable. | Select when sensing ≥500-mA currents with ≥5-mΩ shunts - trades sensitivity for wider dynamic range. |
| INA4290A3IRGVT | 100 V/V gain; ±15 µV max offset; 900-kHz BW; identical pinout and thermal design. | Optimized for ultra-low-current sensing (<100 mA) with sub-5-mV VSENSE; reduced bandwidth limits high-speed OCP. | Choose for battery-backed backup rails or low-power standby monitoring where 10-mV resolution is mandatory. |
Compared with INA4290A1IRGVT and INA4290A3IRGVT, the INA4290A2IRGVT strikes a balanced trade-off: its 50 V/V gain delivers optimal SNR for 48-V server rails (20–200 mA range), retains full 1.1-MHz bandwidth, and maintains tighter offset specs than the A1 while avoiding the bandwidth penalty of the A3.
Availability
INA4290A2IRGVT is available at Aetrix Electronics and suitable for 48-V rack servers, active antenna systems, and macro remote radio units requiring stable component supply, extended temperature support (–40°C to +125°C), and production-grade traceability.
Supply support for INA4290A2IRGVT 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, embedded processing, and high-reliability ICs for industrial, automotive, and communications infrastructure.
The INA4290 series belongs to TI's precision current-sense amplifier product line, designed specifically for high-voltage, high-accuracy power monitoring in next-generation 48-V and 120-V datacenter and 5G telecom systems.
FAQ
What is the maximum common-mode voltage the INA4290A2IRGVT can withstand during normal operation?
The INA4290A2IRGVT 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, enabling robustness against transient surges in telecom and industrial 48-V systems. This specification is validated per TI SBOS961C Rev C test conditions and applies directly to the INA4290A2IRGVT device.
Does the INA4290A2IRGVT support bidirectional current sensing?
No, the INA4290A2IRGVT is a high-side-only, unidirectional current-sense amplifier. Its architecture requires IN+ to be at a higher potential than IN–, and it cannot measure reverse current flow. For bidirectional applications, TI recommends the INA2290 or INA240 families - the INA4290A2IRGVT is explicitly designed for single-direction monitoring in 48-V server and RRU power rails.
What is the thermal resistance (RθJA) of the INA4290A2IRGVT in its QFN package?
The INA4290A2IRGVT in the 16-pin RGV QFN package has a junction-to-ambient thermal resistance (RθJA) of 45.9°C/W, measured under JEDEC JESD51-2 standard conditions. This value assumes a 2-layer board with 1-in² copper pour under the thermal pad; actual performance improves with enhanced layout per TI's Layout Guidelines in SBOS961C Section 10.
Can the INA4290A2IRGVT drive a 10-kΩ load while maintaining specified accuracy?
Yes - the INA4290A2IRGVT output is characterized for RLOAD = 10 kΩ across –40°C to +125°C, with guaranteed swing to within 70 mV of VS and 25 mV of GND. Output voltage accuracy, gain error, and settling time specifications in SBOS961C Section 6.5 are all tested under this exact load condition, confirming full compliance for standard ADC interface use.
How does the gain option (A2) affect bandwidth and noise performance in the INA4290A2IRGVT?
The A2 gain (50 V/V) delivers 1.1-MHz bandwidth and 50 nV/√Hz input-referred voltage noise - identical to the A1 variant and higher than A3–A5. Per SBOS961C Figure 6-10 and Table 6.5, bandwidth decreases only for gains ≥100 V/V (A3: 900 kHz, A4: 850 kHz). Noise remains constant across all variants, as it is defined by the core amplifier topology, not gain setting.
INA4290A2IRGVT 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)
INA4290A2IRGVT FAQ
1.How can I place an order for INA4290A2IRGVT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA4290A2IRGVT 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 INA4290A2IRGVT reliable?
The price and inventory of INA4290A2IRGVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA4290A2IRGVT is usually 5 days.
3.What payment methods are accepted for INA4290A2IRGVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA4290A2IRGVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA4290A2IRGVT?
INA4290A2IRGVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA4290A2IRGVT 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 INA4290A2IRGVT?
For technical support, including INA4290A2IRGVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA4290A2IRGVT requirements.
6.How does Aetrix verify that INA4290A2IRGVT is sourced from the original manufacturer or authorized distributors?
All INA4290A2IRGVT 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 INA4290A2IRGVT meets industry standards.
7.What is the process for return or replacement of INA4290A2IRGVT?
All INA4290A2IRGVT units undergo pre-shipment inspection (PSI). If there is an issue with INA4290A2IRGVT, 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 INA4290A2IRGVT part is unused and in its original packaging.
Return procedure for INA4290A2IRGVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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