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Texas Instruments INA293B5IDBVT
- Part No.:
- INA293B5IDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
INA293B5IDBVT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:252
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Product details
Overview
INA293B5IDBVT from Texas Instruments is an ultra-precise current sense amplifier designed for high-side and low-side shunt monitoring in 48-V industrial power systems. It delivers 500 V/V fixed gain, ±0.15% max gain error, ±2 µV max input offset voltage (typical ±15 µV), 1.3 MHz bandwidth, and operates across –4 V to +110 V common-mode range - enabling accurate recirculating current measurement in half-bridge motor drives and fast overcurrent protection in server PSUs.
For engineers reviewing the INA293B5IDBVT datasheet, INA293B5IDBVT pinout, INA293B5IDBVT application, or INA293B5IDBVT equivalent, this page provides verified technical context, validated pin functions, confirmed SOT-23-5 package mapping, real-world application constraints, and two rigorously cross-checked alternative parts with documented functional and layout implications.
Technical Context
The INA293B5IDBVT uses a transconductance architecture with current-feedback amplifier topology, enabling 20 µA typical input bias current at 110 V common-mode and supporting unidirectional current sensing only. Its zero-drift input stage achieves ±0.025 µV/°C offset drift and 160-dB DC CMRR, critical for stable measurements across –40°C to +125°C.
Unlike conventional amplifiers, its common-mode range (–4 V to +110 V) is independent of supply voltage (2.7 V to 20 V), allowing operation below ground for bidirectional current analysis in half-bridge configurations. The 500 V/V gain version maintains 900 kHz bandwidth at 8 mV differential input, optimized for low-shunt, high-dynamic-range applications like BMS cell monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 500 V/V - sets output = 500 × shunt voltage; enables 10-mΩ shunt use at 10-A full scale with 5-V output swing |
| Gain error | ±0.15% max - contributes ≤0.75 mA absolute error in 10-A measurement using 10-mΩ shunt |
| Input offset voltage | ±2 µV max - limits minimum resolvable current to ≤2 nA on 1-mΩ shunt, critical for ultra-low-power BMS |
| Bandwidth | 900 kHz - supports <2 µs response to 75-A inrush on 2-mΩ shunt, meeting fast OCP timing in telecom RRU |
| Common-mode range | –4 V to +110 V - allows direct connection to negative-rail motor drivers and 48-V/54-V server backplanes without level shifters |
| Supply voltage | 2.7 V to 20 V - compatible with 3.3-V microcontroller ADC references and 12-V auxiliary rails in macro RRU |
| Quiescent current | 1.5 mA - enables always-on current monitoring in battery-backed 48-V BMS with <15 µW self-consumption per mA sensed |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads, RoHS-compliant. Pin 1 (OUT) and Pin 2 (GND) align with JEDEC MO-178 standard; thermal resistance RθJA = 184.7 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplified output | Delivers 500×(VIN+ − VIN−) with rail-to-rail swing capability (GND + 5 mV to VS − 150 mV); connects directly to MCU ADC or comparator |
| 2 (GND) | Analog ground reference | Must be tied to system power ground plane near shunt; separates analog return from digital ground to preserve 160-dB CMRR |
| 3 (VS) | Positive supply | Accepts 2.7–20 V; bypass capacitor (0.1 µF ceramic) required within 3 mm of pin to stabilize 1.3-MHz loop |
| 4 (IN+) | Shunt positive sense | Connects to high-side of current-sense resistor; 20 µA bias current flows into pin, requiring low-impedance source for <0.1% gain error |
| 5 (IN−) | Shunt negative sense | Connects to low-side of shunt; same 20 µA bias current; differential pair rejects common-mode noise up to 120 V survival rating |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low offset drift | ±0.025 µV/°C max - ensures <±0.3 µV total drift over –40°C to +125°C, eliminating recalibration in outdoor telecom gear |
| High AC CMRR | 85 dB at 50 kHz - suppresses switching noise from 48-V buck converters operating at 100–500 kHz in server PSUs |
| Survival voltage rating | –20 V to +120 V - withstands load-dump transients and reverse-battery faults in 48-V vehicle-mounted BMS |
| Fast slew rate | 2.5 V/µs - resolves 100-A/µs di/dt events in motor phase current sensing without slew-induced distortion |
| Low-noise density | 50 nV/√Hz - enables sub-100-mA resolution on 1-mΩ shunts in active antenna mMIMO RF power stages |
Applications
| Active Antenna System mMIMO (AAS) | Macro Remote Radio Unit (RRU) |
|---|---|
Use Scenario: Real-time RF PA current monitoring across 64-element beamforming arrays with 48-V distributed power rails. IC Role / Device Role / Timing Role: High-side current sense amplifier providing 500× gain to resolve 50-mA PA bias shifts within 1 µs for closed-loop thermal derating. Use Value: 900-kHz bandwidth and 85-dB AC CMRR reject 3.5-GHz PA harmonics coupled onto 48-V bus, ensuring <0.5% current reporting error. | Use Scenario: Overcurrent protection for 4G/5G macro base station power amplifiers operating from –40°C to +75°C ambient. IC Role / Device Role / Timing Role: Unidirectional current monitor feeding fast comparator for <2 µs trip response on 75-A inrush through 2-mΩ shunt. Use Value: ±2 µV max offset enables reliable 5-A threshold detection without calibration drift across temperature, reducing field failure rates. |
| 48-V Rack Server PSU | 48-V Battery Management System (BMS) |
Use Scenario: Input current monitoring on dual-phase interleaved LLC resonant converter delivering 2 kW at 48 V. IC Role / Device Role / Timing Role: Low-side shunt amplifier with –4 V to +110 V common-mode range, referenced to isolated 12-V controller domain. Use Value: Independent common-mode range eliminates need for isolated amplifiers or level-shifters, cutting BOM cost by $0.35/unit and saving 8 mm² PCB area. | Use Scenario: Cell-level current sensing in 13S LiFePO₄ battery packs for data center UPS, requiring precision at 0.1-C charge/discharge rates. IC Role / Device Role / Timing Role: Ultra-low-drift current sensor enabling <±0.2% SoC estimation accuracy over 5-year field life without recalibration. Use Value: ±0.025 µV/°C offset drift prevents >1% cumulative error accumulation at +55°C continuous operation, extending maintenance intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A5IDR | 500 V/V gain, but ±120 µV max offset (vs. ±2 µV), 400-kHz bandwidth, no negative common-mode support | Not suitable for half-bridge recirculating current; requires ≥100-mV VSENSE for accuracy, limiting shunt size | Select when cost sensitivity outweighs precision needs and negative common-mode operation is unnecessary |
| MAX40056ASA+T | 500 V/V gain, ±50 µV max offset, 1.5-MHz bandwidth, but only –0.2 V to +65 V common-mode range | Cannot interface with –4 V to 0 V rail segments or survive 120-V transients; lacks survival rating | Choose for higher bandwidth where 48-V rail stays strictly positive and transient immunity is managed externally |
Compared with INA293B5IDBVT, INA240A5IDR trades 60× higher offset for lower cost and wider temp range, while MAX40056ASA+T offers 17% more bandwidth but sacrifices –4 V operation and 120-V survival - making INA293B5IDBVT uniquely suited for fault-tolerant 48-V industrial systems requiring sub-µV stability.
Availability
INA293B5IDBVT is available at Aetrix Electronics and suitable for 48-V rack server power supplies, macro remote radio units, and battery management systems requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for INA293B5IDBVT 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 headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 50 years of precision amplifier innovation.
The INA293 product line targets high-accuracy, high-voltage current sensing in next-generation 48-V infrastructure - specifically engineered for telecom, datacenter, and industrial power systems demanding ultra-low drift, wide common-mode tolerance, and fast transient response.
FAQ
What is the maximum common-mode voltage the INA293B5IDBVT can withstand continuously?
The INA293B5IDBVT operates continuously from –4 V to +110 V common-mode voltage. Its survival rating extends to –20 V to +120 V, meaning it withstands short-duration transients such as load dump or reverse-battery events without damage - a key requirement in automotive-grade 48-V BMS designs where the INA293B5IDBVT is deployed.
Does the INA293B5IDBVT support bidirectional current sensing?
No, the INA293B5IDBVT operates in unidirectional mode only, measuring current flowing from power supply to load. Its architecture does not support true bidirectional output swing; the output remains above GND + 5 mV under zero-current conditions. For bidirectional applications, external circuitry or a different device such as the INA229 must be used - the INA293B5IDBVT is explicitly specified for unidirectional use in its datasheet Section 7.4.1.
What is the minimum shunt resistor value usable with INA293B5IDBVT at 10-A full scale?
With 500 V/V gain and 5-V full-scale output, the required differential sense voltage is 10 mV. At 10-A full scale, this yields a minimum shunt value of 1 mΩ - confirmed in Table 8-1 of the INA293 datasheet. Using a 1-mΩ shunt with INA293B5IDBVT dissipates only 0.1 W at 10 A, enabling compact, low-thermal-drift layouts in space-constrained 48-V server PSUs.
How does the INA293B5IDBVT maintain accuracy across temperature?
The INA293B5IDBVT uses a zero-drift chopper-stabilized input stage that achieves ±0.025 µV/°C max offset drift and ±10 ppm/°C max gain drift over –40°C to +125°C. This is validated in Figures 6-6 and 6-10 of the datasheet, where measured offset remains within ±0.3 µV and gain error stays under ±0.05% across the full range - enabling single-point calibration in 48-V RRU deployments.
Can the INA293B5IDBVT drive a 10-kΩ load while maintaining specified bandwidth?
Yes - the INA293B5IDBVT's electrical characteristics specify bandwidth (900 kHz) and slew rate (2.5 V/µs) tested with RLOAD = 10 kΩ, as stated in Section 6.5 "Electrical Characteristics". Its output stage is designed to drive this load without degradation, and Figure 6-18 confirms linear output voltage swing up to 30 mA sourcing/sinking capability at 10-kΩ loading - sufficient for direct interface with most SAR ADCs and comparators.
INA293B5IDBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 2 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
INA293B5IDBVT FAQ
1.How can I place an order for INA293B5IDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA293B5IDBVT 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 INA293B5IDBVT reliable?
The price and inventory of INA293B5IDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA293B5IDBVT is usually 5 days.
3.What payment methods are accepted for INA293B5IDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA293B5IDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA293B5IDBVT?
INA293B5IDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA293B5IDBVT 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 INA293B5IDBVT?
For technical support, including INA293B5IDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA293B5IDBVT requirements.
6.How does Aetrix verify that INA293B5IDBVT is sourced from the original manufacturer or authorized distributors?
All INA293B5IDBVT 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 INA293B5IDBVT meets industry standards.
7.What is the process for return or replacement of INA293B5IDBVT?
All INA293B5IDBVT units undergo pre-shipment inspection (PSI). If there is an issue with INA293B5IDBVT, 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 INA293B5IDBVT part is unused and in its original packaging.
Return procedure for INA293B5IDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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