My Inquiry
My Account
Allegro MicroSystems A1366LKTTF-10-T
- Part No.:
- A1366LKTTF-10-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- 4-SSIP
- Datasheet:
-
A1366LKTTF-10-T.pdf
- Description:
- LOW NOISE, HIGH-PRECISION LINEAR
- Quantity:
- Payment:
- Shipping:
Inventory:2,510
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
A1366LKTTF-10-T from Allegro MicroSystems is a factory-programmed linear Hall-effect current sensor IC designed for high-accuracy, high-bandwidth analog current sensing in automotive power electronics. It delivers 10 mV/G sensitivity, ±1% typical accuracy over –40°C to 150°C, and 120 kHz bandwidth - enabling precise closed-loop control in HEV inverters, DC-DC converters, and electric power steering (EPS) systems.
For engineers reviewing the A1366LKTTF-10-T datasheet, A1366LKTTF-10-T pinout, A1366LKTTF-10-T application, or A1366LKTTF-10-T equivalent, key selection criteria include its ratiometric analog output, built-in broken-ground-wire detection, AEC-Q100 qualification, and factory-trimmed temperature compensation delivering flat sensitivity drift (<±2.5%) across full operating range.
Technical Context
The A1366LKTTF-10-T integrates a BiCMOS interface with proprietary chopper-stabilized Hall element, dynamic offset cancellation, and digital-domain segmented linear interpolated temperature compensation stored in on-chip EEPROM. This architecture preserves analog signal path bandwidth while eliminating thermal drift in both sensitivity and quiescent output voltage.
Its functional block includes VCC-powered signal conditioning, real-time temperature sensing, EEPROM-based calibration lookup, and a low-impedance rail-to-rail analog output stage. The device implements undervoltage lockout (VUVLOH = 4 V), power-on reset (VPORH = 2.6 V), and open-circuit ground detection - all optimized for fault-tolerant operation in safety-critical automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensitivity | 10 mV/G (factory-programmed; enables direct scaling for 100 G full-scale current sensing) |
| Operating Temperature | –40°C to +150°C (AEC-Q100 Grade 0 qualified; supports under-hood EPS and inverter placement) |
| Bandwidth | 120 kHz (–3 dB small-signal; sufficient for fast-switching SiC/GaN inverter current monitoring) |
| Accuracy | ±1% typical total error over temperature (achieved via digital TC interpolation; eliminates external calibration) |
| Output Type | Ratiometric analog voltage (VOUT(Q) = 2.5 V at VCC = 5 V; tracks supply variation for ADC reference alignment) |
| Noise | 5 mVRMS (CL = 1 nF; supports high-resolution current measurement without external filtering) |
| Supply Voltage | 4.5–5.5 V (with UVLO at 3.5 V/4 V; ensures clean startup and brownout recovery in 5 V automotive rails) |
Pinout & Package
Package: 4-pin SIP (Single In-line Package), 1 mm case thickness, Pb-free with 100% matte tin leadframe plating, TH/TN leadform options available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Power input (4.5–5.5 V); requires 0.1 µF bypass capacitor to GND for noise immunity and UVLO stability |
| 2 | VOUT | Analog output (0.5–4.5 V ratiometric range); low-impedance (9 Ω) drive supports direct connection to 12-bit+ ADCs |
| 3 | NC | No internal connection; must be tied to GND for optimal ESD protection per Allegro layout guidelines |
| 4 | GND | Ground reference; open-circuit detection triggers VBRK(HIGH)/VBRK(LOW) fault signaling |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed sensitivity & quiescent output | 10 mV/G and 2.5 V (±10 mV) trimmed at Allegro; eliminates system-level calibration labor and test time |
| Segmented linear interpolated temperature compensation | Digital TC stored in EEPROM; achieves <±0.25% linearity error and <±2.5% sensitivity drift over –40°C to 150°C |
| 120 kHz analog bandwidth with chopper stabilization | Enables real-time current feedback for >60 kHz PWM switching frequencies without phase lag penalties |
| Built-in broken ground wire detection | Monitors GND continuity; asserts fault voltage (VBRK) to alert host controller of wiring failure in EPS or inverter harnesses |
| AEC-Q100 Grade 0 qualification | Validated for 150°C junction operation; meets automotive reliability requirements for powertrain and chassis applications |
Applications
| Hybrid Electric Vehicle (HEV) Inverter | Electric Power Steering (EPS) |
|---|---|
Use Scenario: Real-time phase current sensing in 3-phase IGBT/SiC inverter modules for torque vectoring and motor control. IC Role / Device Role / Timing Role: Primary analog current transducer; provides isolated, high-bandwidth feedback to MCU ADC with <3.7 µs response time. Use Value: Enables field-oriented control (FOC) at >10 kHz loop rates; ±1% accuracy reduces thermal derating margins by up to 15%. | Use Scenario: Motor current monitoring in brushless DC assist motors for torque estimation and overload protection. IC Role / Device Role / Timing Role: High-reliability current sensor with broken-wire detection; integrated into EPS ECU's current sense path. Use Value: AEC-Q100 qualification and 150°C operation ensure uninterrupted function during sustained high-load steering maneuvers. |
| Automotive DC-DC Converter | Onboard Charger (OBC) Current Monitoring |
Use Scenario: Input/output current sensing in 48 V–12 V bidirectional DC-DC converters for mild hybrid architectures. IC Role / Device Role / Timing Role: Ratiometric analog sensor interfacing directly to converter controller's ADC; immune to supply ripple. Use Value: 10 mV/G sensitivity and 5 mVRMS noise support ±1% current regulation accuracy across full load and temperature range. | Use Scenario: Secondary-side current measurement in AC-DC and DC-DC stages of EV onboard chargers. IC Role / Device Role / Timing Role: High-bandwidth analog front-end for isolation amplifier or shunt-based current loops requiring fast transient response. Use Value: 120 kHz bandwidth captures switching harmonics up to 5th order; reduces need for external anti-aliasing filters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear Hall-effect current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ACS724LLCTR-10AU-T | 10 mV/A sensitivity, integrated conductor, SOIC-8 package; no factory TC interpolation - relies on analog compensation (±1.5% typical error over temp) | Lower cost, lower bandwidth (80 kHz), not AEC-Q100 Grade 0 qualified; suited for non-safety-critical 12 V systems | Select when board space allows SOIC-8 and Grade 0 qualification is not required; verify thermal derating at 150°C ambient. |
| TLE4971-2500S4HALA | 25 mV/mT sensitivity (≈2.5 mV/G), 200 kHz bandwidth, PG-TO263-7 package; uses digital TC but with different interpolation algorithm (±0.5% typical error) | Higher bandwidth and integrated overcurrent flag; requires external 5 V regulator; designed for 48 V battery systems | Select when >100 kHz response is mandatory and system supports dual-supply (5 V logic + 12 V analog); confirm compatibility with existing PCB footprint. |
Compared with ACS724LLCTR-10AU-T and TLE4971-2500S4HALA, the A1366LKTTF-10-T offers superior temperature stability (±1% vs. ±1.5%/±0.5%) within its 120 kHz bandwidth and single 5 V supply constraint - making it optimal for cost-sensitive, space-constrained AEC-Q100-compliant EPS and HEV inverter designs where factory calibration assurance is critical.
Availability
A1366LKTTF-10-T is available at Aetrix Electronics and suitable for hybrid electric vehicle (HEV) inverters, electric power steering (EPS) systems, and automotive DC-DC converters requiring stable component supply through product lifecycle transitions.
Supply support for A1366LKTTF-10-T 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
Allegro MicroSystems is a U.S.-based semiconductor company specializing in magnetic sensing and power ICs for automotive, industrial, and consumer applications.
The A1366 product line was developed specifically for high-accuracy, high-bandwidth current sensing in automotive electrification systems - emphasizing AEC-Q100 compliance, factory-trimmed temperature stability, and robust fault diagnostics for safety-critical powertrain functions.
FAQ
What is the sensitivity of the A1366LKTTF-10-T and how is it programmed?
The A1366LKTTF-10-T has a factory-programmed sensitivity of 10 mV/G, measured at 100 G and 25°C. This value is permanently stored in on-chip EEPROM using Allegro's proprietary linear interpolation TC algorithm. No external programming or calibration is required - the A1366LKTTF-10-T ships fully characterized and ready for system integration.
Does the A1366LKTTF-10-T support operation at 150°C ambient temperature?
Yes, the A1366LKTTF-10-T is AEC-Q100 Grade 0 qualified and specified for continuous operation from –40°C to +150°C ambient. Its thermal resistance (RθJA = 174 °C/W) and internal thermal protection enable reliable function in under-hood locations such as HEV inverter control units and EPS motor modules without derating.
How does the broken ground wire detection work on the A1366LKTTF-10-T?
The A1366LKTTF-10-T monitors continuity on its GND pin (Pin 4). If disconnected, the output voltage shifts to VBRK(HIGH) ≈ VCC (when pulled up) or VBRK(LOW) ≤ 100 mV (when pulled down), providing a clear fault signal to the host microcontroller. This feature is implemented entirely within the IC and requires no external circuitry.
What is the bandwidth and response time of the A1366LKTTF-10-T?
The A1366LKTTF-10-T has a –3 dB small-signal bandwidth of 120 kHz and a response time (tRESPONSE) of 3.7 µs. Propagation delay is 2.2 µs and rise time is 3.6 µs (measured at 400 G step, CL = 1 nF). These values are guaranteed across –40°C to 150°C and enable accurate current capture in fast-switching SiC/GaN power stages.
Is the A1366LKTTF-10-T pin-compatible with other variants in the A1366 family?
Yes, all A1366 variants - including A1366LKTTF-1-T, A1366LKTTF-2-T, A1366LKTTF-5-T, and A1366LKTTF-10-T - share identical 4-pin SIP (KT) packaging, pinout, and electrical interface. Only sensitivity and quiescent output voltage differ; no PCB layout changes are needed when substituting between variants for different current range requirements.
A1366LKTTF-10-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 4-SSIP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Technology:
- Hall Effect
- Axis:
- Single
- Output Type:
- Analog Voltage
- Sensing Range:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Supply (Max):
- 15mA
- Current - Output (Max):
- 10mA
- Resolution:
- -
- Bandwidth:
- 120kHz
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Features:
- Temperature Compensated
- Supplier Device Package:
- 4-SIP
- Mounting Type:
- Through Hole
A1366LKTTF-10-T FAQ
1.How can I place an order for A1366LKTTF-10-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A1366LKTTF-10-T 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 A1366LKTTF-10-T reliable?
The price and inventory of A1366LKTTF-10-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1366LKTTF-10-T is usually 5 days.
3.What payment methods are accepted for A1366LKTTF-10-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1366LKTTF-10-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A1366LKTTF-10-T?
A1366LKTTF-10-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A1366LKTTF-10-T 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 A1366LKTTF-10-T?
For technical support, including A1366LKTTF-10-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1366LKTTF-10-T requirements.
6.How does Aetrix verify that A1366LKTTF-10-T is sourced from the original manufacturer or authorized distributors?
All A1366LKTTF-10-T 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 A1366LKTTF-10-T meets industry standards.
7.What is the process for return or replacement of A1366LKTTF-10-T?
All A1366LKTTF-10-T units undergo pre-shipment inspection (PSI). If there is an issue with A1366LKTTF-10-T, 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 A1366LKTTF-10-T part is unused and in its original packaging.
Return procedure for A1366LKTTF-10-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
A1366LKTTF-10-T Tags
-
DRV5053VAQDBZR
Texas Instruments
-
MMC5603NJ
Memsic Inc.
-
DRV5055A1QDBZR
Texas Instruments
-
MLX90392ELQ-AAA-011-RE
Melexis Technologies NV
-
CT100LW-HS6
Allegro MicroSystems
-
DRV5056A1ELPGMQ1
Texas Instruments
-
A1304ELHLX-T
Allegro MicroSystems
-
MMC5633NJL
Memsic Inc.
-
A1308KUA-2-T
Allegro MicroSystems
-
A1308KUA-1-T
Allegro MicroSystems
-
SI7210-B-04-IVR
Silicon Labs
-
A1308LLHLT-2-T
Allegro MicroSystems
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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…
