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Texas Instruments INA241B5QDDFRQ1
- Part No.:
- INA241B5QDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA241B5QDDFRQ1.pdf
- Description:
- AEC-Q100, -4-V TO 110-V BIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:2,619
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Product details
Overview
INA241B5QDDFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) bidirectional current sense amplifier with 200V/V gain, −5V to 110V operational common-mode range, ±150µV max input offset voltage, and 1.1MHz bandwidth-designed for high-precision motor phase current monitoring in electric power steering and regenerative braking systems.
For engineers reviewing the INA241B5QDDFRQ1 datasheet, INA241B5QDDFRQ1 pinout, INA241B5QDDFRQ1 application, or INA241B5QDDFRQ1 equivalent, this page delivers verified specifications, SOT-23-8 pin mapping, automotive-grade PWM rejection performance up to 125kHz, and real-world design context for high-side/low-side shunt sensing in switching powertrain subsystems.
Technical Context
The INA241B5QDDFRQ1 implements a zero-drift, high-common-mode topology with integrated enhanced PWM rejection circuitry that holds output for 1µs during fast ΔV/Δt transients-enabling stable measurement under 125kHz PWM edge rates. Its input stage operates independently of supply voltage, supporting common-mode voltages beyond VS (up to 110V while powered from 2.7V–20V).
It features dual reference inputs (REF1/REF2) enabling programmable output offset from 0V to VS, and maintains 1.1MHz small-signal bandwidth across all gains. The device achieves 104dB AC-CMRR at 100kHz and 89dB at 1MHz-critical for rejecting noise in high-dV/dt motor drive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200V/V - enables 5mV full-scale shunt voltage to produce 1V output, optimizing dynamic range for low-resistance, high-current sensing. |
| Common-Mode Range | −5V to 110V - supports direct high-side sensing on 48V/60V bus systems without level-shifting or isolation. |
| Input Offset Voltage | ±150µV max - ensures ≤0.75mV error at 200V/V gain, critical for sub-1% current accuracy in EPS and starter/generator control. |
| Bandwidth | 1.1MHz - captures fast overcurrent events within ≤1µs settling time to 1%, meeting ISO 26262 ASIL-B timing requirements. |
| PWM Rejection | Up to 125kHz - suppresses output disturbance during gate-drive switching transients, eliminating need for external filtering in motor inverters. |
| Supply Range | 2.7V to 20V - compatible with 3.3V/5V logic domains and 12V/15V automotive supplies without regulation overhead. |
| Quiescent Current | 2.5mA - enables always-on current monitoring in battery-sensitive applications like brake-by-wire. |
Pinout & Package
INA241B5QDDFRQ1 is packaged in an 8-pin SOT-23 (DDF) measuring 2.9mm × 2.8mm, optimized for space-constrained automotive PCB layouts and thermally efficient high-density placement near power stages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− (Pin 1) | Current-sense amplifier negative input | Connect to load side in high-side sensing or ground side in low-side sensing; handles −5V to 110V common-mode. |
| GND (Pin 2) | Ground reference | System ground return for internal biasing and output swing reference; must be low-impedance path. |
| REF2 (Pin 3) | Reference voltage input | Adjusts output offset; connect to 0V–VS to set baseline output between GND and VS. |
| NC (Pin 4) | No-connect terminal | Reserved pin; must be connected to GND per TI layout guidelines to minimize noise coupling. |
| OUT (Pin 5) | Analog output | Provides amplified, bidirectional current signal; swings to within 70mV of VS and 8mV above GND (RL = 10kΩ). |
| VS (Pin 6) | Power supply | Accepts 2.7V–20V; powers internal amplifiers and reference circuitry; bypass with 1µF ceramic capacitor. |
| REF1 (Pin 7) | Reference voltage input | Paired with REF2 to define output center point; differential reference configuration enables rail-to-rail output tuning. |
| IN+ (Pin 8) | Current-sense amplifier positive input | Connect to bus-voltage side in high-side sensing or load side in low-side sensing; matched to IN− for CMRR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation-meets automotive powertrain ambient and junction temperature requirements without derating. |
| Enhanced PWM rejection | 1µs output hold + high AC-CMRR (104dB @ 100kHz) eliminates transient-induced measurement errors during IGBT/MOSFET switching. |
| Bidirectional sensing | Supports both charging and discharging current flow-essential for regenerative braking and eTurbo energy recovery circuits. |
| Zero-drift architecture | ±0.5µV/°C offset drift ensures long-term stability across thermal cycles in engine bay or under-hood locations. |
| Survival voltage rating | Withstands −20V to +120V common-mode transients-protects against load dump and inductive kickback in 48V systems. |
Applications
| eTurbo / Electric Turbocharger | Electric Power Steering (EPS) |
|---|---|
Use Scenario: Real-time phase current monitoring of 48V BLDC eTurbo motor during rapid boost pressure modulation. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 125kHz PWM rejection, placed inline with motor phases to feed FOC controller. Use Value: Enables <1µs overcurrent detection and torque ripple suppression, improving transient response and reducing mechanical stress on turbo vanes. |
Use Scenario: Low-side shunt sensing of assist motor current in column-assist EPS systems operating at 12V–48V. IC Role / Device Role / Timing Role: Precision bidirectional amplifier delivering 200V/V gain output to MCU ADC with minimal latency and offset drift. Use Value: Achieves ±0.5% current accuracy across −40°C to 125°C, ensuring consistent assist torque delivery and functional safety compliance. |
| Starter/Generator (P4 Hybrid) | Regenerative Braking System |
Use Scenario: High-side sensing of combined starter/generator current in 48V mild-hybrid architectures during cranking and generation modes. IC Role / Device Role / Timing Role: Wide common-mode (−5V to 110V) amplifier interfacing directly to battery bus, rejecting EMI from adjacent DC-DC converters. Use Value: Eliminates need for isolated amplifiers or discrete level-shifters-reducing BOM count and PCB area by >30%. |
Use Scenario: Bidirectional current measurement across brake caliper motor shunts during energy recovery and friction braking transitions. IC Role / Device Role / Timing Role: Fast-settling (1µs to 1%) amplifier feeding real-time current feedback to brake control unit for torque blending. Use Value: Maintains measurement integrity during 100kHz+ PWM transitions-preventing false regen disable triggers and improving energy capture efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A5QDRQ1 | Same 200V/V gain, but ±120µV max offset and 100kHz PWM rejection limit; no Grade 0 option. | Limited to Grade 1 (−40°C to 125°C); lower AC-CMRR (95dB @ 100kHz) reduces noise immunity in high-dV/dt environments. | Choose when cost sensitivity outweighs need for 125kHz PWM rejection or extended temperature margin. |
| MAX40056ATA+T | 200V/V gain, ±100µV offset, but only −0.2V to 65V common-mode range and no AEC-Q100 qualification. | Not qualified for automotive powertrain; requires external protection for >65V transients and lacks survival rating. | Select only for non-automotive industrial motor drives where 110V common-mode and AEC-Q100 are not required. |
Compared with INA240A5QDRQ1 and MAX40056ATA+T, INA241B5QDDFRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 110V common-mode operation, 125kHz PWM rejection, and SOT-23-8 footprint-making it the only drop-in solution for space-constrained, high-reliability 48V/60V automotive current sensing.
Availability
INA241B5QDDFRQ1 is available at Aetrix Electronics and suitable for electric power steering, regenerative braking, and eTurbo control systems requiring stable component supply, automotive-grade traceability, and long-term production continuity.
Supply support for INA241B5QDDFRQ1 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 automotive IC development expertise and ISO/TS 16949-certified manufacturing.
The INA241x-Q1 product line was engineered specifically for high-accuracy, high-reliability current sensing in next-generation 48V and high-voltage automotive powertrain systems-including EPS, brake-by-wire, and hybrid starter-generators.
FAQ
What is the maximum common-mode voltage the INA241B5QDDFRQ1 can withstand during normal operation?
The INA241B5QDDFRQ1 supports an operational common-mode input range of −5V to 110V, meaning it functions correctly when the voltage at IN+ and IN− floats anywhere within that span relative to GND-enabling direct high-side sensing on 48V and 60V automotive buses without external level-shifting circuitry. This specification is guaranteed across its full −40°C to +125°C operating temperature range.
Does the INA241B5QDDFRQ1 require external components for basic operation?
Yes-the INA241B5QDDFRQ1 requires a 1µF ceramic bypass capacitor between VS and GND, and both REF1 and REF2 must be connected to defined voltage potentials (e.g., VS/2 for centered output) or GND/VS for unidirectional operation. NC (Pin 4) must be tied to GND per TI layout guidance to ensure optimal noise immunity and PWM rejection performance.
How does the enhanced PWM rejection feature work in the INA241B5QDDFRQ1?
The INA241B5QDDFRQ1 employs proprietary circuitry that detects fast common-mode transients (ΔV/Δt) and holds its output stable for 1µs, preventing propagation of switching noise. For transients spaced ≥3µs apart, it relies on high AC-CMRR (104dB @ 100kHz) and 1.1MHz bandwidth to attenuate residual disturbance-enabling clean current measurement even under 125kHz PWM gate drive conditions.
Is the INA241B5QDDFRQ1 pin-compatible with other devices in the INA241x-Q1 family?
Yes-INA241B5QDDFRQ1 shares identical pinout and package (SOT-23-8, DDF) with all other INA241x-Q1 variants including INA241A1–A5QDDFRQ1 and INA241B1–B4QDDFRQ1. This allows direct substitution across gain options without PCB redesign, provided system-level offset, gain error, and temperature requirements are verified.
What is the typical quiescent current consumption of the INA241B5QDDFRQ1?
The INA241B5QDDFRQ1 draws 2.5mA of quiescent current at TA = 25°C and VS = 5V, rising to 3.2mA at maximum operating temperature (125°C). This low power draw supports always-on current monitoring in battery-powered automotive modules such as brake control units and EPS ECUs without compromising standby runtime.
INA241B5QDDFRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
INA241B5QDDFRQ1 FAQ
1.How can I place an order for INA241B5QDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241B5QDDFRQ1 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 INA241B5QDDFRQ1 reliable?
The price and inventory of INA241B5QDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241B5QDDFRQ1 is usually 5 days.
3.What payment methods are accepted for INA241B5QDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241B5QDDFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241B5QDDFRQ1?
INA241B5QDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241B5QDDFRQ1 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 INA241B5QDDFRQ1?
For technical support, including INA241B5QDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241B5QDDFRQ1 requirements.
6.How does Aetrix verify that INA241B5QDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241B5QDDFRQ1 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 INA241B5QDDFRQ1 meets industry standards.
7.What is the process for return or replacement of INA241B5QDDFRQ1?
All INA241B5QDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241B5QDDFRQ1, 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 INA241B5QDDFRQ1 part is unused and in its original packaging.
Return procedure for INA241B5QDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241B5QDDFRQ1 Tags
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