My Inquiry
My Account
Allegro MicroSystems A1365LKTTN-10-T
- Part No.:
- A1365LKTTN-10-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- 4-SIP Module
- Datasheet:
-
A1365LKTTN-10-T.pdf
- Description:
- LOW NOICS HALL SENSOR
- Quantity:
- Payment:
- Shipping:
Inventory:4,131
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
A1365LKTTN-10-T from Allegro MicroSystems is a programmable linear Hall-effect sensor IC designed for high-accuracy current sensing in automotive HEV inverters and DC–DC converters. It delivers ratiometric analog output (0.6–14 mV/G sensitivity range), 120 kHz bandwidth, ±1% total error over –40°C to +150°C, and integrated self-test diagnostics with <4.5 µs fault response.
For engineers reviewing the A1365LKTTN-10-T datasheet, A1365LKTTN-10-T pinout, A1365LKTTN-10-T application, or A1365LKTTN-10-T equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific use cases, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The A1365LKTTN-10-T implements proprietary segmented linear temperature compensation (TC) to achieve ≤±2.5% sensitivity drift across –40°C to +150°C and near-zero quiescent voltage drift. Its chopper-stabilized BiCMOS architecture enables 120 kHz small-signal bandwidth and 1.1 mG/√Hz noise floor.
It integrates a 6-bit programmable window comparator for Over Field Fault detection, with user-selectable hysteresis (0–120 mV), latching/non-latching behavior, and ratiometric trigger thresholds (0.12×VCC to 0.28×VCC and 0.72×VCC to 0.88×VCC). Self-test mode validates both sensitivity and fault functionality at power-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensitivity Range | 6.4–14 mV/G - factory-set coarse range enabling optimal TC performance without post-factory recalibration |
| Bandwidth | 120 kHz - supports fast current transients in HEV motor control and high-frequency DC–DC switching |
| Operating Temp | –40°C to +150°C - qualified for under-hood automotive environments including inverter modules |
| Fault Response Time | <4.5 µs - enables rapid shutdown during magnetic over-field events in safety-critical power stages |
| Total Error | ≤±1% typical - achieved via segmented TC and factory-trimmed offset/sensitivity, reducing calibration burden |
| Output Clamps | VCLP(HIGH) = 4.55–4.85 V, VCLP(LOW) = 0.15–0.45 V - provide short-circuit detection and ADC interface robustness |
| Self-Test Mode | User-activated diagnostic verifying sensitivity accuracy and FAULT pin functionality - meets ASIL-B functional safety requirements |
Pinout & Package
Package: 4-pin SIP (Single Inline Package), 1 mm thickness, lead-free with 100% matte-tin plating - optimized for minimal air gap and high magnetic coupling in current-sensing cores.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VCC | Power supply input and programming channel | Supplies 4.5–5.5 V; also used for Manchester-encoded EEPROM programming and UVLO monitoring |
| 2: VOUT | Analog output and programming channel | Delivers ratiometric voltage proportional to magnetic field; doubles as bidirectional serial data line for configuration |
| 3: FAULT | Digital fault flag output | Open-drain output indicating over-field condition; internally pulled up to VCC via 10 kΩ resistor |
| 4: GND | Ground reference and broken-wire detection node | Monitored for open-circuit failure; triggers diagnostic if disconnected - critical for ISO 26262-compliant systems |
Key Features
| Feature | Design Value |
|---|---|
| Segmented Linear TC | Reduces sensitivity drift to ≤±2.5% over full temperature range - eliminates need for system-level software compensation |
| Programmable Fault Comparator | 6-bit threshold + 2-bit hysteresis + latch control - enables precise magnetic trip points tailored to specific busbar geometry |
| Broken Ground Detection | Validates GND continuity at power-up and runtime - prevents false zero-current readings in faulted wiring conditions |
| Ratiometric Output | VOUT(Q), sensitivity, and clamps scale with VCC - simplifies ADC interfacing without external reference voltage |
| EEPROM Memory Lock | One-time programmable EELOCK bit prevents accidental reprogramming after production calibration - ensures BOM stability |
Applications
| HEV Inverter Current Sensing | Automotive DC–DC Converter Monitoring |
|---|---|
|
Use Scenario: Real-time phase current measurement in 400 V traction inverters with SiC MOSFETs switching at >20 kHz. IC Role / Device Role / Timing Role: High-bandwidth linear Hall sensor providing isolated analog feedback to gate driver controller with <3.7 µs response time. Use Value: Enables precise torque control and overcurrent protection within 4.5 µs fault latency - critical for ASIL-C motor control loops. |
Use Scenario: Input/output current monitoring in 12 V/48 V bi-directional DC–DC converters for 48 V mild hybrid architectures. IC Role / Device Role / Timing Role: Ratiometric analog sensor interfaced directly to 12-bit MCU ADC, leveraging VCC-tracking clamps for rail-to-rail validity. Use Value: Eliminates external voltage references and reduces BOM count while maintaining ±1% accuracy across temperature and supply variation. |
| Onboard Charger (OBC) Isolation Feedback | Electric Power Steering (EPS) Motor Phase Sensing |
|
Use Scenario: Secondary-side current sensing in isolated LLC resonant converters inside EV onboard chargers. IC Role / Device Role / Timing Role: Thin SIP package mounted on PCB near current path; outputs analog signal referenced to isolated ground domain. Use Value: 1 mm package height minimizes magnetic air gap - improves coupling efficiency and signal-to-noise ratio by >3 dB vs. taller packages. |
Use Scenario: Low-noise rotor position–adjacent current sensing in EPS dual-motor redundancy systems. IC Role / Device Role / Timing Role: Dual-channel implementation using A1365LKTTN-10-T and companion part for cross-checked phase current measurement. Use Value: Integrated self-test validates sensor health before each drive cycle - satisfies ISO 26262 diagnostic coverage requirements for ASIL-D subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear Hall-effect sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ACS724LLCTR-10AU-T | Fixed 10 A range, galvanically isolated, 80 kHz bandwidth, no programmable fault comparator or self-test | Lacks field-programmable fault thresholds and diagnostic features - requires external logic for over-field detection | Choose when isolation is mandatory and diagnostic depth is secondary to cost; not suitable for ASIL-B/C fault handling |
| TLE4971-2K | 12-bit digital SPI output, 200 kHz bandwidth, integrated CRC, but no analog output or EEPROM programmability | Requires MCU with SPI interface; no ratiometric analog output for direct ADC connection | Prefer when digital bus integration and higher resolution are prioritized over analog simplicity and field-programmable fault behavior |
Compared with ACS724LLCTR-10AU-T and TLE4971-2K, the A1365LKTTN-10-T uniquely combines analog ratiometric output, on-chip fault comparator with 6-bit programmability, and production-ready self-test - making it the only option among the three qualified for HEV inverter current sensing with functional safety compliance.
Availability
A1365LKTTN-10-T is available at Aetrix Electronics and suitable for automotive HEV inverters, 48 V DC–DC converters, and electric power steering systems requiring stable component supply across extended temperature and long product lifecycles.
Supply support for A1365LKTTN-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 designer of high-performance magnetic sensing and power ICs, specializing in automotive-grade Hall-effect solutions since 1989.
The A1365 product line targets high-reliability current sensing in electrified vehicle powertrains, with emphasis on functional safety, temperature stability, and programmable diagnostics - directly addressing ASIL-B/C requirements in ISO 26262 systems.
FAQ
What is the factory-programmed sensitivity range for A1365LKTTN-10-T?
The A1365LKTTN-10-T is factory-programmed for a coarse sensitivity range of 6.4–14 mV/G, as indicated by the "-10" suffix. This setting enables optimal temperature compensation performance - altering coarse bits post-factory risks exceeding ΔSensTC limits of ±2.5% over temperature.
Does A1365LKTTN-10-T support self-test diagnostics, and how is it activated?
Yes, A1365LKTTN-10-T includes a user-activated self-test mode that verifies both sensitivity accuracy and Over Field Fault functionality. It is triggered via a specific Manchester-encoded command sequence on the VCC/VOUT pins after power-up, and is required for ASIL-B functional safety compliance in automotive applications.
What package type and dimensions does A1365LKTTN-10-T use?
A1365LKTTN-10-T uses a 4-pin SIP (single inline package) with TN (straight leadform), 1 mm maximum thickness, and lead-free construction with 100% matte-tin plating. Its thin profile minimizes magnetic air gap in current-sensing cores, improving coupling efficiency and SNR.
How is the FAULT pin configured and what are its timing characteristics?
The FAULT pin is an open-drain output with internal 10 kΩ pull-up to VCC. It asserts low within <4.5 µs (typ) of magnetic field crossing programmed thresholds. Trigger levels are ratiometric (0.12×VCC to 0.28×VCC and 0.72×VCC to 0.88×VCC) and configurable via 6-bit EEPROM registers.
Can A1365LKTTN-10-T operate with supply voltages outside 4.5–5.5 V?
No - A1365LKTTN-10-T is specified for 4.5–5.5 V operation. Undervoltage lockout disables output below 3.05–3.2 V (falling) and re-enables above 4.0–4.3 V (rising). Absolute maximum VCC is 6 V; exceeding this risks permanent damage per absolute ratings.
A1365LKTTN-10-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 4-SIP Module
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -
- Qualification:
- -
- Features:
- Programmable
- Supplier Device Package:
- 4-SIP
- Mounting Type:
- Through Hole
A1365LKTTN-10-T FAQ
1.How can I place an order for A1365LKTTN-10-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A1365LKTTN-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 A1365LKTTN-10-T reliable?
The price and inventory of A1365LKTTN-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 A1365LKTTN-10-T is usually 5 days.
3.What payment methods are accepted for A1365LKTTN-10-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1365LKTTN-10-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A1365LKTTN-10-T?
A1365LKTTN-10-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A1365LKTTN-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 A1365LKTTN-10-T?
For technical support, including A1365LKTTN-10-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1365LKTTN-10-T requirements.
6.How does Aetrix verify that A1365LKTTN-10-T is sourced from the original manufacturer or authorized distributors?
All A1365LKTTN-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 A1365LKTTN-10-T meets industry standards.
7.What is the process for return or replacement of A1365LKTTN-10-T?
All A1365LKTTN-10-T units undergo pre-shipment inspection (PSI). If there is an issue with A1365LKTTN-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 A1365LKTTN-10-T part is unused and in its original packaging.
Return procedure for A1365LKTTN-10-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
A1365LKTTN-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…
