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Texas Instruments INA296B5IDGKR
- Part No.:
- INA296B5IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA296B5IDGKR.pdf
- Description:
- -5-V TO 110-V, BIDIRECTIONAL, 1.
- Quantity:
- Payment:
- Shipping:
Inventory:2,485
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Product details
Overview
INA296B5IDGKR from Texas Instruments is a bidirectional, ultra-precise current sense amplifier with 200V/V fixed gain, −5V to 110V common-mode input range, 1.1MHz bandwidth, and 8V/µs slew rate-designed for high-speed overcurrent detection in 48V BMS and DC/DC converters.
For engineers reviewing the INA296B5IDGKR datasheet, INA296B5IDGKR pinout, INA296B5IDGKR application, or INA296B5IDGKR equivalent, this page delivers verified specifications, package mapping (VSSOP-8), functional pin roles, real-world use cases in 48V power systems, and two validated alternative parts with documented technical and application differences.
Technical Context
The INA296B5IDGKR employs a zero-drift, high-voltage input stage enabling operation beyond supply rails (−5V to 110V CM) while maintaining ±150µV max offset and ±0.1% max gain error across −40°C to 125°C. Its 1.1MHz bandwidth and 1µs 1% settling time support fast transient response in protection-critical applications.
It uses dual reference inputs (REF1/REF2) to configure unidirectional or bidirectional output centering, with internal precision resistor matching ensuring ≤±0.15% reference divider accuracy. Input bias current remains constant at 35µA (typ) across full CM range-unaffected by voltage swing-enabling low-leakage shunt sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200V/V - sets output scaling for low VSENSE signals (e.g., 10mV shunt drop → 2V output), optimizing dynamic range with 48V bus systems. |
| Common-Mode Range | −5V to 110V - supports high-side, low-side, and inline sensing in 48V/60V/100V systems without level-shifting or isolation. |
| Bandwidth | 1.1MHz - enables detection of sub-microsecond overcurrent events in telecom RRU and server PSU protection circuits. |
| Slew Rate | 8V/µs - ensures faithful reproduction of fast current transients without distortion during fault conditions. |
| Offset Voltage (max) | ±150µV - limits measurement error to ≤0.75mV at 200× gain, critical for accurate low-current monitoring in BMS cell balancing. |
| Supply Range | 2.7V to 20V - decouples power rail from sensing rail, allowing single 3.3V/5V logic supply while monitoring 48V–110V buses. |
| Operating Temp | −40°C to 125°C - qualified for under-hood automotive, industrial rack-mount, and outdoor telecom equipment environments. |
Pinout & Package
VSSOP-8 (DGK) package: 3mm × 4.9mm body, 0.65mm pitch, exposed thermal pad (not electrically connected), RoHS-compliant, moisture sensitivity level 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Current-sense positive input | Connect to bus side of shunt in high-side config; load side in low-side-defines polarity for bidirectional output swing. |
| IN− | Current-sense negative input | Connect to load side in high-side; ground side in low-side-differential voltage (IN+ − IN−) scaled by 200× appears at OUT. |
| GND | Ground reference | Return path for supply current and reference network; must be low-impedance to avoid CMRR degradation. |
| NC | No-connect terminal | Internally reserved; must be tied to GND per datasheet to ensure stability and EMI performance. |
| OUT | Analog output | Provides 200×(IN+ − IN−) + (REF1 + REF2)/2; swings within 20mV of GND and 70mV below VS at full load. |
| VS | Power supply input | Accepts 2.7V–20V; powers internal circuitry-output compliance depends on VS, not CM voltage. |
| REF1 | Reference voltage input | One half of programmable output center point; paired with REF2 to set quiescent output (e.g., VS/2 for bidirectional mode). |
| REF2 | Reference voltage input | Second half of output centering network; identical function to REF1-both must be biased between GND and VS. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing capability | Configurable via REF1/REF2 biasing-enables single-device current direction and magnitude measurement in 48V BMS charge/discharge paths. |
| CMRR ≥120dB (min) | Rejects >99.9999% of common-mode noise at 48V bus, preserving µV-level VSENSE integrity in noisy switch-mode environments. |
| Constant 35µA input bias | Eliminates CM-dependent leakage error-critical for precision shunt measurements where input impedance must remain stable across −5V–110V. |
| 1µs 1% settling time | Supports <1µs fault response in safety-critical 48V server PSUs, meeting IEC 62368-1 transient overcurrent reaction requirements. |
| Zero-drift architecture | Maintains ±150µV offset and ±5ppm/°C drift over −40°C to 125°C-ensures calibration stability without periodic re-zeroing in field-deployed gear. |
Applications
| 48V Battery Management System | Macro Remote Radio Unit (RRU) |
|---|---|
Use Scenario: Monitoring bidirectional charge/discharge current in 48V lithium-ion battery packs for telecom base stations. IC Role / Device Role / Timing Role: High-side current sense amplifier measuring mV-level shunt voltage with 200× gain and rail-to-rail output referenced to VS/2. Use Value: Enables precise state-of-charge estimation and overcurrent shutdown within 1µs-preventing cell imbalance and thermal runaway. |
Use Scenario: Real-time PA current monitoring in 5G macro RRU power amplifiers operating from 48V input. IC Role / Device Role / Timing Role: Low-latency current feedback element in closed-loop PA bias control, interfacing directly with ADC input. Use Value: Delivers 1.1MHz bandwidth and 8V/µs slew rate to capture fast PA envelope transients-improving efficiency and linearity. |
| 48V Rack Server PSU | Industrial 48V DC/DC Converter |
Use Scenario: Input/output current monitoring in redundant 48V server power supplies for fault logging and derating control. IC Role / Device Role / Timing Role: Bidirectional amplifier placed on primary-side shunt, rejecting 48V CM noise while resolving ±10mA sense current. Use Value: ±0.1% gain error and ±150µV offset ensure <0.5% total current measurement uncertainty across temperature-meeting PMBus accuracy specs. |
Use Scenario: Output current sensing in isolated 48V-to-12V/5V DC/DC modules for overcurrent protection and load sharing. IC Role / Device Role / Timing Role: Low-side current monitor with GND-referenced output, driving analog input of microcontroller's integrated ADC. Use Value: 2.7V–20V supply flexibility allows direct interface with 3.3V MCU rail; 35µA input bias prevents shunt loading errors in high-precision designs. |
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 | 200V/V gain, −4V to 80V CM range, 4V/µs slew rate, ±120µV offset (A-grade), SOIC-8 only | Limited to ≤80V systems; slower response unsuitable for <500ns fault detection; no VSSOP option | Select when cost-sensitive 80V applications tolerate reduced speed and wider package footprint. |
| MAX40056ASA+T | 200V/V gain, −5V to 65V CM, 1.5MHz BW, ±100µV offset, SOT23-8 only, 2.7V–5.5V supply | Narrower supply range restricts use with >5.5V MCUs; 65V CM limit excludes 100V industrial systems | Choose for space-constrained 48V consumer electronics where SOT23-8 fit is mandatory and 65V ceiling is acceptable. |
Compared with INA296B5IDGKR, INA240A5IDR trades 30V CM headroom and 2× slew rate for lower cost and broader temp range, while MAX40056ASA+T sacrifices CM range and supply flexibility to achieve smaller footprint-neither matches the VSSOP-8 + 110V + 8V/µs combination of the INA296B5IDGKR.
Availability
INA296B5IDGKR is available at Aetrix Electronics and suitable for 48V battery management systems, macro remote radio units, and industrial DC/DC converters requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for INA296B5IDGKR 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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision signal conditioning and power management ICs.
The INA296x family was engineered specifically for high-voltage, high-bandwidth bidirectional current sensing in next-generation 48V power architectures-including datacenter PSUs, EV charging infrastructure, and 5G telecom equipment.
FAQ
What is the maximum common-mode voltage the INA296B5IDGKR can withstand during operation?
The INA296B5IDGKR operates continuously over a common-mode input range of −5V to 110V. Its survival rating extends to −20V to 120V, meaning it tolerates brief transients up to 120V without damage. This enables reliable use in 48V, 60V, and 100V industrial bus systems without external protection circuitry-verified per TI SBOSA04D Absolute Maximum Ratings table.
Does the INA296B5IDGKR require external compensation components for stability?
No, the INA296B5IDGKR is internally compensated and stable with capacitive loads up to 1nF-no external compensation is needed. The device maintains phase margin >45° across all gains and supply voltages, as confirmed in the Typical Characteristics section (Figure 6-24, Output Impedance vs Frequency) and Electrical Characteristics table (Maximum Capacitive Load = 1nF).
How does the reference pin configuration affect bidirectional operation of the INA296B5IDGKR?
For bidirectional operation, REF1 and REF2 are biased to different potentials-typically VS and GND-to set the quiescent output to VS/2. A positive VSENSE drives OUT above VS/2; negative VSENSE pulls OUT below VS/2. This is defined in Equation 1 of the datasheet and validated in Figure 7-1 test circuit-enabling full-scale current direction detection with a single-ended ADC input.
What is the typical input bias current of the INA296B5IDGKR, and why is it important for shunt accuracy?
The INA296B5IDGKR draws 35µA (typical) input bias current per input pin-and critically, this value remains constant across the full −20V to 120V common-mode range. Unlike competitive amplifiers, its bias current does not scale with VCM, eliminating variable shunt loading error and ensuring consistent gain accuracy in high-side 48V sensing configurations.
Can the INA296B5IDGKR be used in low-side current sensing applications?
Yes, the INA296B5IDGKR supports low-side sensing: connect IN+ to the load side of the shunt and IN− to system ground. Its −5V to 110V common-mode range fully covers ground-referenced configurations, and its 20mV output swing to GND (min) ensures usable signal headroom even at low supply voltages like 3.3V-confirmed in Section 6.5 Electrical Characteristics (Swing to Ground).
INA296B5IDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- Single-Ended
- Slew Rate:
- 8V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.1 MHz
- Current - Input Bias:
- 35 µA
- Voltage - Input Offset:
- 25 µV
- Current - Supply:
- 2.5mA
- 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:
- 8-VSSOP
INA296B5IDGKR FAQ
1.How can I place an order for INA296B5IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA296B5IDGKR 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 INA296B5IDGKR reliable?
The price and inventory of INA296B5IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA296B5IDGKR is usually 5 days.
3.What payment methods are accepted for INA296B5IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA296B5IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA296B5IDGKR?
INA296B5IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA296B5IDGKR 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 INA296B5IDGKR?
For technical support, including INA296B5IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA296B5IDGKR requirements.
6.How does Aetrix verify that INA296B5IDGKR is sourced from the original manufacturer or authorized distributors?
All INA296B5IDGKR 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 INA296B5IDGKR meets industry standards.
7.What is the process for return or replacement of INA296B5IDGKR?
All INA296B5IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with INA296B5IDGKR, 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 INA296B5IDGKR part is unused and in its original packaging.
Return procedure for INA296B5IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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