My Inquiry
My Account
Texas Instruments INA241B4IDR
- Part No.:
- INA241B4IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA241B4IDR.pdf
- Description:
- -5-V TO 110-V BIDIRECTIONAL HIGH
- Quantity:
- Payment:
- Shipping:
Inventory:2,460
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA241B4IDR from Texas Instruments is a bidirectional, ultra-precise current sense amplifier optimized for high-voltage switching systems, featuring 100V/V fixed gain, −5V to 110V operational common-mode range, ±150µV max input offset voltage, and enhanced PWM rejection up to 125kHz - deployed in motor drive inline current monitoring where precision under fast transients is critical.
For engineers reviewing the INA241B4IDR datasheet, INA241B4IDR pinout, INA241B4IDR application, or INA241B4IDR equivalent, this page delivers verified specifications, package mapping, real-world use cases, and validated alternative options - all grounded in TI's SBOSA30D production data sheet (December 2024 revision).
Technical Context
The INA241B4IDR employs a zero-drift, multistage amplifier architecture with integrated enhanced PWM rejection circuitry that holds output for 1µs during large ΔV/Δt common-mode transients, then relies on 1.1MHz bandwidth and 89dB AC-CMRR at 1MHz to suppress residual disturbances. Its input bias current remains constant (35µA typ) across the full −20V to 120V survival common-mode range.
This device operates from 2.7V to 20V supply, draws 2.5mA quiescent current, and delivers rail-to-rail output swing (within 20mV of GND and 200mV below VS) while maintaining ±0.1% max gain error and ±5ppm/°C drift - enabling accurate bidirectional current measurement in high-side, low-side, or inline configurations without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - sets full-scale output to 100× shunt voltage drop, enabling high-resolution sensing with low-value shunts (e.g., 1mΩ yields 100mV/A). |
| Common-Mode Range | −5V to 110V - supports operation beyond supply rails, allowing direct high-side sensing in 48V/60V bus systems without level-shifting. |
| Input Offset Voltage | ±150µV max - ensures ≤1.5mA error at 100mV full-scale output when using 10mΩ shunt, critical for low-current accuracy. |
| Small-Signal Bandwidth | 1.1MHz - enables detection of sub-microsecond overcurrent events in BLDC motor commutation or solenoid turn-on. |
| PWM Rejection | Up to 125kHz - suppresses output disturbance from gate-drive switching edges, eliminating need for external filtering in 20–100kHz motor drives. |
| Supply Voltage | 2.7V to 20V - compatible with 3.3V control logic and 12V/15V analog rails, simplifying mixed-supply system integration. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, industrial motor controllers, and drone power stages. |
Pinout & Package
SOT-23-8 package (DDF), 2.9mm × 2.8mm footprint, thermally enhanced for high-density PCB layouts in space-constrained motor control modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− (Pin 1) | Negative current-sense input | Connect to load side (high-side) or ground side (low-side) of shunt; differential input with IN+ defines VSENSE. |
| GND (Pin 2) | Ground reference | System ground return for internal circuitry and output stage; must be low-impedance path to minimize noise coupling. |
| REF2 (Pin 3) | Reference voltage input | Paired with REF1 to set output mid-point; tied to GND for unidirectional mode or to VS for inverted output scaling. |
| NC (Pin 4) | No-connect terminal | Internally reserved; must be connected to GND per datasheet to ensure stability and EMI performance. |
| OUT (Pin 5) | Analog output | 100×(IN+ − IN−) + (REF1 + REF2)/2; drives ADC inputs or comparator thresholds directly with rail-swing capability. |
| VS (Pin 6) | Power supply | 2.7V–20V single supply; powers internal amplifiers and reference network; bypass with 1µF ceramic near pin. |
| REF1 (Pin 7) | Reference voltage input | Matches REF2 function; differential reference pair enables bidirectional output centered at (REF1 + REF2)/2. |
| IN+ (Pin 8) | Positive current-sense input | Connect to bus-voltage side (high-side) or load side (low-side); forms differential pair with IN− for VSENSE measurement. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced PWM rejection | 1µs hold time + high AC-CMRR attenuates gate-drive transients up to 125kHz, eliminating post-processing correction in motor FOC loops. |
| Constant input bias current | 35µA typical across −20V to 120V common-mode range - avoids gain error drift caused by shunt leakage in high-voltage solenoid drivers. |
| Zero-drift topology | ±150µV max offset and ±0.5µV/°C drift enable stable <1% current measurement error from −40°C to +125°C without calibration. |
| Reference-configurable output | REF1/REF2 pins allow programmable output centering (e.g., 0–5V for unidirectional, ±2.5V for bidirectional), reducing external signal conditioning. |
| High-speed settling | 1µs to 1% for 0.5V–4.5V step - supports real-time overcurrent shutdown in cordless tool battery protection circuits. |
Applications
| Motor Drive Current Monitoring | Solenoid Actuator Control |
|---|---|
|
Use Scenario: Real-time phase current measurement in 3-phase BLDC motor inverters operating at 20–80kHz PWM frequency. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier placed between IGBT/driver and motor winding, sampling VSENSE at >100kSPS. Use Value: Enhanced PWM rejection prevents false overcurrent trips during gate transitions, improving system reliability without added RC filters. |
Use Scenario: Precision current regulation in industrial hydraulic solenoid valves with 12V–48V supply and 500mA–5A load range. IC Role / Device Role / Timing Role: Low-side current monitor feeding closed-loop PID controller; measures turn-on/turn-off transients within 1µs. Use Value: 1.1MHz bandwidth captures solenoid inrush peaks, enabling predictive coil health diagnostics via transient shape analysis. |
| Drone Propeller ESC Feedback | Cordless Power Tool Battery Protection |
|
Use Scenario: Inline current sensing in brushless ESCs for multirotor drones, where compact size and thermal resilience are critical. IC Role / Device Role / Timing Role: Bidirectional amplifier in 4-layer PCB with minimal copper area, measuring motor regeneration current during braking. Use Value: SOT-23-8 package and −40°C to +125°C rating support operation in enclosed carbon-fiber frames exposed to ambient temperature swings. |
Use Scenario: Cell-level current monitoring in 18V–60V cordless drill battery packs with active protection ICs. IC Role / Device Role / Timing Role: High-side monitor detecting short-circuit events (<500ns response) before MOSFETs fail, interfacing with TI BQ769x2 AFE. Use Value: ±150µV offset ensures <50mA detection threshold with 2mΩ shunt, enabling precise charge/discharge balancing without false triggers. |
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 | Same 100V/V gain, but ±120µV max offset and ±0.2µV/°C drift - tighter initial accuracy but lower tempco than INA241B4IDR. | Preferred for room-temperature lab equipment; less suited for wide-temp industrial environments due to higher drift. | Select INA240A4IDR only if system operates ≤85°C and requires lower initial offset; INA241B4IDR better for automotive/industrial thermal cycling. |
| MAX40056ASA+T | 100V/V gain, −5V to 65V common-mode, ±200µV offset, no integrated PWM rejection - requires external filtering for 100kHz+ switching. | Used in cost-sensitive consumer tools where PWM edge rates are <50kHz and layout allows RC snubbers. | Choose MAX40056ASA+T only if common-mode stays ≤65V and system can accommodate external transient suppression; INA241B4IDR eliminates that design burden. |
Compared with INA240A4IDR and MAX40056ASA+T, the INA241B4IDR uniquely combines extended 110V common-mode range, built-in 125kHz PWM rejection, and guaranteed ±150µV offset across −40°C to +125°C - making it the only option requiring no external components for robust operation in high-voltage, high-dV/dt motor control.
Availability
INA241B4IDR is available at Aetrix Electronics and suitable for motor drives, solenoid actuators, drone ESCs, cordless power tools, and medical cordless tools requiring stable component supply across extended temperature and high-voltage operating conditions.
Supply support for INA241B4IDR 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 chain solutions.
The INA241x family was designed specifically for high-reliability current sensing in switching power systems - targeting motor control, industrial automation, and battery-powered equipment where common-mode transients and temperature stability are primary constraints.
FAQ
What is the maximum common-mode voltage the INA241B4IDR can withstand continuously?
The INA241B4IDR supports continuous operation from −5V to 110V common-mode voltage. Its survival rating extends to −20V to 120V, meaning it tolerates brief transients within that range without damage. This allows direct connection to 48V, 60V, or 72V bus systems in motor drives without external attenuation or isolation.
Does the INA241B4IDR require external components for PWM rejection?
No. The INA241B4IDR integrates proprietary enhanced PWM rejection circuitry that holds its output for 1µs during large ΔV/Δt transients and leverages 1.1MHz bandwidth plus 89dB AC-CMRR at 1MHz to suppress residual disturbances - eliminating the need for external RC filters or ferrite beads in 20–125kHz motor drive applications.
How does the REF1 and REF2 pin configuration affect bidirectional operation of the INA241B4IDR?
Connecting REF1 to VS and REF2 to GND centers the INA241B4IDR output at VS/2, enabling true bidirectional output swing (e.g., 0.5V to 4.5V for 5V supply). This allows positive current to raise OUT above mid-supply and negative current to pull it below - essential for regenerative braking current measurement in ESCs and servo drives.
Can the INA241B4IDR be used in low-side current sensing configurations?
Yes. The INA241B4IDR supports low-side, high-side, and inline configurations. For low-side use, connect IN+ to the load side of the shunt and IN− to ground. Its −5V to 110V common-mode range accommodates ground-referenced designs while maintaining immunity to supply noise and enabling accurate measurement even with noisy ground returns.
What is the quiescent current consumption of the INA241B4IDR across its operating temperature range?
The INA241B4IDR draws 2.5mA typical quiescent current at 25°C, rising to 3.2mA maximum across −40°C to +125°C. This stable, low supply current enables use in always-on battery monitoring circuits and energy-conscious industrial sensors without compromising response speed or accuracy.
INA241B4IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
INA241B4IDR FAQ
1.How can I place an order for INA241B4IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241B4IDR 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 INA241B4IDR reliable?
The price and inventory of INA241B4IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241B4IDR is usually 5 days.
3.What payment methods are accepted for INA241B4IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241B4IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241B4IDR?
INA241B4IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241B4IDR 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 INA241B4IDR?
For technical support, including INA241B4IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241B4IDR requirements.
6.How does Aetrix verify that INA241B4IDR is sourced from the original manufacturer or authorized distributors?
All INA241B4IDR 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 INA241B4IDR meets industry standards.
7.What is the process for return or replacement of INA241B4IDR?
All INA241B4IDR units undergo pre-shipment inspection (PSI). If there is an issue with INA241B4IDR, 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 INA241B4IDR part is unused and in its original packaging.
Return procedure for INA241B4IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241B4IDR Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
