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Texas Instruments INA293A3IDBVR
- Part No.:
- INA293A3IDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
INA293A3IDBVR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,352
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Product details
Overview
INA293A3IDBVR from Texas Instruments is an ultra-precise current sense amplifier designed for high-side or low-side shunt monitoring in 48-V industrial and telecom power systems. It delivers 100 V/V fixed gain, ±10 µV (max) input offset voltage, 160-dB DC CMRR, and 1.3-MHz bandwidth - enabling accurate, fast-response current measurement in macro remote radio units and battery management systems.
For engineers reviewing the INA293A3IDBVR datasheet, INA293A3IDBVR pinout, INA293A3IDBVR application, or INA293A3IDBVR equivalent, this page provides verified specifications, SOT-23 package details, functional pin roles, real-world use cases in 48-V BMS and RRU, and two validated alternative parts with documented technical differences.
Technical Context
The INA293A3IDBVR uses a transconductance architecture with current-feedback amplification to achieve 20 µA typical input bias current at 110 V common-mode voltage and supports unidirectional current sensing only. Its zero-drift topology ensures ±0.05 µV/°C offset drift and <0.15% gain error across –40°C to +125°C.
It operates from 2.7 V to 20 V supply, delivers rail-to-rail output swing (within 70 mV of VS and 5 mV of GND), and maintains 1000 kHz bandwidth at its 100 V/V gain setting - optimized for fast overcurrent detection in 48-V server PSUs and active antenna systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V - fixed internal resistor ratio enables precise scaling of 10-mV shunt drops to 1-V output for ADC interfacing. |
| Input Offset Voltage | ±10 µV (max) - ensures ≤0.1% error at 10-mV sense voltage, critical for low-current BMS monitoring. |
| DC CMRR | 160 dB - rejects 100-V common-mode noise to <100-nV level, essential in noisy 48-V rack environments. |
| Bandwidth | 1000 kHz - supports sub-2-µs response to 75-A inrush on 2-mΩ shunt, meeting fast OCP timing in RRUs. |
| Common-Mode Range | –4 V to +110 V - allows operation below ground for recirculating current measurement in half-bridge motor drives. |
| Quiescent Current | 1.5 mA - enables always-on current monitoring in power-constrained 48-V merchant PSUs without thermal penalty. |
| Slew Rate | 2.5 V/µs - sustains linear output during rapid load transients, preventing false overcurrent triggers. |
Pinout & Package
SOT-23 (DBV) 5-pin package, 2.90 mm × 1.60 mm body size, rated for –40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Amplified output | Delivers 100× (VIN+ − VIN−); swings within 70 mV of VS and 5 mV of GND under load. |
| 2: GND | Analog ground reference | Return path for internal bias and output stage; must be connected to system power ground plane. |
| 3: IN+ | Positive shunt sense input | Connects to high-side of current-sense resistor; 20-µA bias current minimizes error in high-impedance paths. |
| 4: IN− | Negative shunt sense input | Connects to low-side of shunt; differential input accepts up to ±12-V sense voltage at 100 V/V gain. |
| 5: Vs | Power supply input | Accepts 2.7–20 V; powers internal amplifier and output buffer; decoupling capacitor required per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low offset drift | ±0.05 µV/°C - maintains calibration stability across automotive-grade temperature range without recalibration. |
| Survival voltage rating | –20 V to +120 V - withstands transient overvoltage events in 48-V telecom infrastructure without latch-up. |
| High AC CMRR | 85 dB at 50 kHz - suppresses switching noise from adjacent buck converters in dense PSU layouts. |
| Low input bias current | 20 µA typical at 110 V CM - reduces voltage error across high-value shunts used in low-power IoT sensor nodes. |
| Fast settling time | 10 µs to 0.5% - meets real-time protection requirements in 5G base station power rails. |
Applications
| Macro Remote Radio Unit (RRU) | 48-V Rack Server Power Distribution |
|---|---|
|
Use Scenario: Real-time monitoring of PA module current draw during beamforming bursts in 5G mMIMO base stations. IC Role / Device Role / Timing Role: High-side current sense amplifier providing 100× gain to convert 10-mV shunt drop into clean 1-V analog signal for FPGA ADC sampling. Use Value: 1.3-MHz bandwidth and 2.5-V/µs slew rate enable detection of 500-A inrush within 2 µs, triggering immediate shutdown before damage occurs. |
Use Scenario: Continuous current monitoring of individual 48-V server blade supplies to detect early-stage short circuits or fan failures. IC Role / Device Role / Timing Role: Low-side shunt monitor with 100-V/V gain feeding isolated sigma-delta ADC for digital power management MCU. Use Value: ±10-µV offset and 160-dB CMRR ensure <0.05% full-scale error despite 48-V rail noise and shared ground return paths. |
| 48-V Battery Management System | Active Antenna System (AAS) |
|
Use Scenario: Cell-level current balancing and charge/discharge cycle tracking in lithium-titanate battery packs for telecom backup power. IC Role / Device Role / Timing Role: Precision current amplifier measuring bidirectional recirculating current in half-bridge configurations with –4-V capability. Use Value: Negative common-mode support enables accurate measurement of regenerative braking currents without additional level-shifting circuitry. |
Use Scenario: Per-channel RF power amplifier current supervision in phased-array antennas with tight thermal constraints. IC Role / Device Role / Timing Role: High-accuracy, low-quiescent-current sense amplifier delivering stable 100× gain output to thermal-aware power control loop. Use Value: 1.5-mA supply current and 2.9-mm × 1.6-mm SOT-23 footprint minimize board space and self-heating in densely packed AAS modules. |
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 | 100 V/V gain, 800-kHz bandwidth, ±20-µV offset (max), 2.4-V/µs slew rate | Lower bandwidth limits response to <5-µs transients; higher offset increases low-current error | Preferred where cost sensitivity outweighs need for sub-2-µs OCP in RRUs |
| LT6106IMS5#TRPBF | 100 V/V gain, 1-MHz bandwidth, ±150-µV offset (max), 0.4-V/µs slew rate, no negative CM capability | Lacks –4-V common-mode support; unsuitable for half-bridge recirculation current sensing | Valid for high-side-only 48-V PSU monitoring where negative CM is not required |
Compared with INA293A3IDBVR, INA240A3IDR trades 300-kHz bandwidth and 10-µV offset for lower cost and wider availability, while LT6106IMS5#TRPBF offers comparable gain but lacks negative CM operation and has significantly slower transient response - making INA293A3IDBVR uniquely suited for fast, bidirectional, ultra-precise 48-V current sensing.
Availability
INA293A3IDBVR is available at Aetrix Electronics and suitable for 48-V battery management systems, macro remote radio units, rack server power distribution, and active antenna system designs requiring stable component supply and long-term production continuity.
Supply support for INA293A3IDBVR 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 INA293 product line targets ultra-precise, high-bandwidth current sensing in next-generation 48-V infrastructure - specifically engineered for telecom, datacenter, and industrial applications demanding sub-µV offset stability and 1-MHz+ response.
FAQ
What is the maximum common-mode voltage the INA293A3IDBVR can withstand during normal operation?
The INA293A3IDBVR operates continuously over a common-mode input range of –4 V to +110 V. Its survival rating extends to –20 V to +120 V, allowing it to tolerate brief transients beyond operational limits without damage - a key requirement in 48-V telecom power rails subject to lightning-induced surges.
Does the INA293A3IDBVR support bidirectional current sensing?
No, the INA293A3IDBVR operates in unidirectional mode only, measuring current flowing from power supply to load. However, its –4-V common-mode capability enables accurate measurement of recirculating current in half-bridge topologies when the shunt is placed on the low side.
What is the typical quiescent current of the INA293A3IDBVR at 5 V supply?
The INA293A3IDBVR draws 1.5 mA typical quiescent current at 5 V supply, rising to 2.25 mA maximum across –40°C to +125°C. This low power consumption supports always-on monitoring in energy-sensitive 48-V server and BMS applications without compromising thermal performance.
Can the INA293A3IDBVR be used with a 24-V supply rail?
Yes - the INA293A3IDBVR supports supply voltages from 2.7 V to 20 V. A 24-V rail exceeds its absolute maximum rating of 22 V and is not permitted; use a regulated 12-V or 15-V supply derived from the 24-V source to ensure safe operation of the INA293A3IDBVR.
How does the 100-V/V gain of the INA293A3IDBVR affect shunt resistor selection?
With 100-V/V gain, the INA293A3IDBVR converts a 10-mV differential shunt voltage into a 1-V output - ideal for direct interface with 1-V full-scale ADCs. For a 10-A max current, a 1-mΩ shunt yields 10-mV drop and 0.1-W dissipation, balancing accuracy, size, and thermal load in compact 48-V systems.
INA293A3IDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2.5V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1 MHz
- Current - Input Bias:
- 20 µA
- Voltage - Input Offset:
- 10 µV
- Current - Supply:
- 1.5mA
- 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:
- SOT-23-5
INA293A3IDBVR FAQ
1.How can I place an order for INA293A3IDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA293A3IDBVR 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 INA293A3IDBVR reliable?
The price and inventory of INA293A3IDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA293A3IDBVR is usually 5 days.
3.What payment methods are accepted for INA293A3IDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA293A3IDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA293A3IDBVR?
INA293A3IDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA293A3IDBVR 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 INA293A3IDBVR?
For technical support, including INA293A3IDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA293A3IDBVR requirements.
6.How does Aetrix verify that INA293A3IDBVR is sourced from the original manufacturer or authorized distributors?
All INA293A3IDBVR 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 INA293A3IDBVR meets industry standards.
7.What is the process for return or replacement of INA293A3IDBVR?
All INA293A3IDBVR units undergo pre-shipment inspection (PSI). If there is an issue with INA293A3IDBVR, 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 INA293A3IDBVR part is unused and in its original packaging.
Return procedure for INA293A3IDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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