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Texas Instruments INA293A4IDBVT
- Part No.:
- INA293A4IDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
INA293A4IDBVT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:240
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Product details
Overview
INA293A4IDBVT from Texas Instruments is an ultra-precise, unidirectional current sense amplifier optimized for high-side and low-side shunt monitoring in 48-V power systems. It delivers 200 V/V fixed gain, ±5 µV (max) input offset voltage, 160-dB DC CMRR, and 900-kHz bandwidth at 20-mV full-scale sense voltage - enabling accurate, fast overcurrent detection in telecom and server PSU protection circuits.
For engineers reviewing the INA293A4IDBVT datasheet, INA293A4IDBVT pinout, INA293A4IDBVT application, or INA293A4IDBVT equivalent, this page provides verified specifications, SOT-23-5 pin mapping, real-world use cases in 48-V BMS and RRU, and validated alternative parts with documented functional differences.
Technical Context
The INA293A4IDBVT uses a transconductance architecture with current-feedback amplifier topology to achieve 20 µA typical input bias current at 110 V common-mode and maintain ±0.15% gain error across –40°C to +125°C. Its zero-drift input stage ensures ±0.025 µV/°C offset drift and supports precise low-VSENSE operation down to 20 mV.
This variant is configured for 200 V/V gain via internal matched resistor network (5 kΩ/1000 kΩ), delivering 900-kHz small-signal bandwidth and 2.5 V/µs slew rate - specifically tuned for sub-2-µs response in fast overcurrent events on 2-mΩ shunts at 75-A thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200 V/V - fixed internal ratio; enables 25-mV input to produce 5-V output, matching ADC full-scale without external scaling |
| Input Offset Voltage | ±5 µV (max) - limits current measurement error to ≤0.25 mA on 2-mΩ shunt at room temperature |
| DC CMRR | 160 dB - rejects >99.9999% of 48-V common-mode noise, critical for accuracy in noisy 48-V rack environments |
| Bandwidth | 900 kHz - supports detection of <1.1-µs rise-time overcurrent transients in macro RRU protection loops |
| Supply Range | 2.7 V to 20 V - operates from single 3.3-V or 5-V rail while interfacing to 48-V or 110-V bus domains |
| Quiescent Current | 1.5 mA - enables always-on monitoring in battery-backed BMS without significant standby drain |
| Common-Mode Range | –4 V to +110 V - allows recirculating current sensing below ground in half-bridge motor drives and bidirectional PSU stages |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm max height, surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Amplified output | Delivers 200×(VIN+ − VIN−); swings to 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 low-impedance system ground plane |
| 3 - IN+ | Positive shunt sense input | Connects to high-side of shunt resistor; 20 µA typical bias current minimizes error on high-value shunts |
| 4 - IN− | Negative shunt sense input | Connects to low-side of shunt; supports –4 V common-mode for recirculating current measurement |
| 5 - VS | Power supply input | Accepts 2.7–20 V; powers internal amplifier and output buffer; decoupling capacitor required at pin |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low offset drift | ±0.025 µV/°C - maintains ≤±0.005% gain-referred error over full –40°C to +125°C range in outdoor telecom gear |
| High AC CMRR | 85 dB at 50 kHz - suppresses switching noise from 48-V buck converters feeding server PSUs |
| Survival voltage rating | –20 V to +120 V - withstands transient surges during hot-swap insertion in 48-V rack servers |
| Fast overload recovery | <10 µs settling to 0.5% - ensures clean output reestablishment after brief overcurrent events in RRU front-end protection |
| ESD robustness | ±2000 V HBM - survives handling in automated SMT assembly lines without special ESD controls |
Applications
| 48-V Rack Server PSU Monitoring | Macro Remote Radio Unit (RRU) |
|---|---|
Use Scenario: Real-time current monitoring of 48-V input stage in multi-rail server power supplies to detect short-circuit faults before MOSFET failure. IC Role / Device Role / Timing Role: High-side current sense amplifier converting 2-mΩ shunt voltage to 0–5 V output for MCU ADC sampling at 100-kSPS. Use Value: 900-kHz bandwidth enables detection of 1.1-µs rise-time faults; ±5 µV offset ensures ≤0.25 mA absolute error at 0 A, critical for idle-current validation. |
Use Scenario: Overcurrent protection in 4G/5G macro base station RRUs where rapid shutdown (<2 µs) prevents PA module damage during lightning-induced surges. IC Role / Device Role / Timing Role: Low-latency analog comparator input driver, feeding fast-response protection logic with amplified shunt signal. Use Value: 2.5 V/µs slew rate and sub-2-µs response time meet 3GPP TR 38.901 surge immunity requirements for outdoor wireless infrastructure. |
| Active Antenna System (AAS) Power Management | 48-V Battery Management System (BMS) |
Use Scenario: Bidirectional current sensing in mMIMO active antenna arrays with half-bridge power stages requiring measurement of both forward and recirculating currents. IC Role / Device Role / Timing Role: Precision current monitor supporting –4 V common-mode to capture negative current flow during dead-time conduction. Use Value: –4 V to +110 V input range enables direct connection across shunt without level-shifting; 160-dB DC CMRR eliminates baseline drift from RF coupling. |
Use Scenario: Cell-level current monitoring in 48-V lithium-ion battery packs for data center UPS, requiring microamp-level accuracy at low SoC states. IC Role / Device Role / Timing Role: Low-drift analog front-end for coulomb counting, interfaced to isolated sigma-delta ADC via 200× gain scaling. Use Value: ±0.025 µV/°C offset drift reduces accumulated charge error to <0.1% over –20°C to +60°C operating range, improving state-of-charge estimation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A4IDR | 200 V/V gain, but 120-dB DC CMRR and ±50 µV max offset; wider –5 V to +80 V common-mode | Better suited for industrial motor drives with lower voltage rails; insufficient CMRR for 48-V telecom noise immunity | Select when cost sensitivity outweighs precision; avoid in RRU or AAS where 160-dB CMRR is required for RF-noise rejection |
| MAX40056ASA+T | 200 V/V gain, 140-dB DC CMRR, ±10 µV max offset, 1-MHz bandwidth; requires dual supply (±5 V) | Designed for test equipment; dual-supply requirement adds complexity in single-rail 48-V systems | Choose only if existing design already uses split supplies; not drop-in for INA293A4IDBVT's single 3.3/5-V operation |
Compared with INA240A4IDR and MAX40056ASA+T, the INA293A4IDBVT uniquely combines 160-dB DC CMRR, ±5 µV offset, and single-supply operation in SOT-23-5 - making it the only option qualified for high-noise, high-accuracy 48-V telecom current sensing without layout or supply redesign.
Availability
INA293A4IDBVT is available at Aetrix Electronics and suitable for 48-V rack server PSU monitoring, macro remote radio unit (RRU) protection, and active antenna system (AAS) power management requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for INA293A4IDBVT 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, power management, and signal chain solutions.
The INA293 product line is designed for ultra-precise, high-bandwidth current sensing in next-generation 48-V infrastructure - targeting telecom, data center, and industrial power systems demanding sub-microvolt offset and 160-dB CMRR at 110-V common-mode.
FAQ
What is the maximum common-mode voltage the INA293A4IDBVT can handle during normal operation?
The INA293A4IDBVT operates continuously over a common-mode input range of –4 V to +110 V. This allows direct connection across shunt resistors in high-side configurations on 48-V or 110-V buses without attenuation or level-shifting. Its survival rating extends to –20 V to +120 V, accommodating transient surges during hot-swap events in rack-mounted systems.
Does the INA293A4IDBVT support bidirectional current sensing?
No, the INA293A4IDBVT is specified for unidirectional current sensing only. It measures current flowing from power supply to load, as confirmed by its functional block diagram and application schematics. While its –4 V common-mode capability permits recirculating current detection in half-bridge topologies, the device does not provide polarity-reversal output or true bidirectional gain configuration.
What is the typical quiescent current of the INA293A4IDBVT, and how does it vary with supply voltage?
The INA293A4IDBVT draws 1.5 mA typical quiescent current at 25°C. According to the datasheet's Figure 6-29, IQ remains stable between 1.4 mA and 1.6 mA across the full 2.7–20 V supply range at room temperature, increasing to 2.25 mA maximum at +125°C. This stability simplifies power budgeting in always-on monitoring applications like BMS.
Can the INA293A4IDBVT drive a 10-kΩ load while maintaining specified output swing?
Yes - the INA293A4IDBVT is characterized driving a 10-kΩ load per the Electrical Characteristics table. At TA = –40°C to +125°C, its output swings to within 70 mV of VS and 5 mV of GND under this load, ensuring compatibility with standard SAR and sigma-delta ADC inputs without buffering. Output impedance remains below 1 Ω up to 100 kHz, minimizing gain error.
How does the 200 V/V gain version differ from other INA293 variants in bandwidth and noise performance?
The INA293A4IDBVT (200 V/V) has a 900-kHz small-signal bandwidth and 50 nV/√Hz input-referred voltage noise density - lower than the 1.3-MHz, 50-nV/√Hz spec of the 20 V/V variant due to gain-bandwidth trade-off. Its noise spectral density remains flat up to 100 kHz, making it optimal for 48-V PSU monitoring where SNR above 10 kHz matters more than raw bandwidth.
INA293A4IDBVT 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:
- 900 kHz
- Current - Input Bias:
- 20 µA
- Voltage - Input Offset:
- 5 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
INA293A4IDBVT FAQ
1.How can I place an order for INA293A4IDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA293A4IDBVT 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 INA293A4IDBVT reliable?
The price and inventory of INA293A4IDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA293A4IDBVT is usually 5 days.
3.What payment methods are accepted for INA293A4IDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA293A4IDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA293A4IDBVT?
INA293A4IDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA293A4IDBVT 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 INA293A4IDBVT?
For technical support, including INA293A4IDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA293A4IDBVT requirements.
6.How does Aetrix verify that INA293A4IDBVT is sourced from the original manufacturer or authorized distributors?
All INA293A4IDBVT 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 INA293A4IDBVT meets industry standards.
7.What is the process for return or replacement of INA293A4IDBVT?
All INA293A4IDBVT units undergo pre-shipment inspection (PSI). If there is an issue with INA293A4IDBVT, 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 INA293A4IDBVT part is unused and in its original packaging.
Return procedure for INA293A4IDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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