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Allegro MicroSystems A1367LKTTN-2U-T
- Part No.:
- A1367LKTTN-2U-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- 4-SIP Module
- Datasheet:
-
A1367LKTTN-2U-T.pdf
- Description:
- SENSOR HALL EFFECT ANALOG 4SIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,951
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Product details
Overview
A1367LKTTN-2U-T from Allegro MicroSystems is a programmable linear Hall-effect current sensor IC designed for high-accuracy, high-bandwidth magnetic field sensing in automotive power electronics. It delivers 240 kHz analog bandwidth, ±1% typical sensitivity accuracy over –40°C to 150°C, and factory-programmed temperature-compensated quiescent output (VOUT(Q)) and sensitivity - with user-adjustable offset (0.4–0.6 VCC) and sensitivity range of 1.3–2.9 mV/G. It is used in HEV inverter current monitoring, DC-DC converter feedback loops, and electric power steering (EPS) motor phase current sensing.
For engineers reviewing the A1367LKTTN-2U-T datasheet, A1367LKTTN-2U-T pinout, A1367LKTTN-2U-T application, or A1367LKTTN-2U-T equivalent, this page provides verified technical context, confirmed pin functions, real-world design meaning of key specs, validated alternatives for legacy design continuity, and supply support guidance for obsolescence-managed procurement.
Technical Context
The A1367LKTTN-2U-T implements proprietary segmented linear temperature compensation in the digital domain using factory-programmed EEPROM, enabling <±2% sensitivity drift (ΔSensTC) and <±10 mV quiescent voltage drift (ΔVOUT(Q)TC) across –40°C to 150°C. Its 240 kHz analog signal path is maintained via chopper stabilization and dynamic offset cancellation, independent of digital temperature compensation latency.
It features ratiometric operation with user-selectable enable/disable of ratiometry for sensitivity, quiescent voltage, and output clamps; integrated broken-ground detection; and programmable output voltage clamps (0.15–0.45 V low, 4.55–4.85 V high) for short-circuit diagnostics. The device uses a BiCMOS interface with low-noise amplifier and clamped push-pull output stage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 240 kHz nominal - enables real-time current sensing in fast-switching SiC/GaN inverters without phase lag. |
| Sensitivity Range | 1.3–2.9 mV/G (SENS_COARSE = 01) - matches mid-range current sensing needs in 30–150 A EPS and DC-DC applications. |
| Operating Temp | –40°C to 150°C - qualified per AEC-Q100 Grade 0, suitable for under-hood automotive placement. |
| Quiescent Output | User-programmable 0.4–0.6 × VCC - supports bidirectional (50% VCC) or unidirectional (10% VCC) configurations for ADC interface flexibility. |
| Output Clamps | VCLP(LOW): 0.15–0.45 V; VCLP(HIGH): 4.55–4.85 V - provides diagnostic flagging of short-to-battery/short-to-ground faults. |
| Noise Performance | 12.6 mVp-p (BW = 240 kHz, Sens = 2 mV/G) - enables sub-0.5% current measurement resolution in noisy power systems. |
| Supply Voltage | 4.5–5.5 V - compatible with standard 5 V automotive rail; includes reverse-battery protection and internal regulator. |
Pinout & Package
Package: 4-pin SIP (Single In-line Package), suffix KT; 1 mm case thickness; Pb-free, 100% matte-tin leadframe; TH and TN leadform options available (TN used in A1367LKTTN-2U-T).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Power input and programming interface | Supplies internal regulator; bypass capacitor required; also used during customer programming via voltage pulses. |
| 2 - VOUT | Analog output and programming interface | Delivers ratiometric voltage proportional to magnetic field; also accepts programming pulses to set offset/sensitivity. |
| 3 - NC | No-connect terminal | Must be connected to GND for optimal ESD performance; no internal connection. |
| 4 - GND | Ground reference and broken-wire detection node | Provides return path; open-circuit detection triggers diagnostic state on VOUT if disconnected. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed TC | Zero-slope sensitivity TC (0 %/°C typ) and zero-drift quiescent voltage TC (0 mV/°C) - eliminates need for external calibration across temperature. |
| Programmable resolution | 9-bit quiescent voltage trim (±0.5×1.15 mV step) and 9-bit fine sensitivity trim (±0.5×6.6 µV/G step) - enables precise end-of-line tuning without hardware changes. |
| Broken ground detection | Detects open GND pin via internal current source and voltage threshold - prevents silent failure in safety-critical EPS and inverter systems. |
| High-bandwidth noise suppression | Proprietary Hall element + low-noise amplifier + dynamic offset cancellation - achieves 1.4 mG/√Hz noise floor at 240 kHz, enabling clean current reconstruction. |
| Ratiometric clamp control | Clamp voltages scale with VCC - ensures consistent fault thresholds across supply variations in automotive 12 V systems. |
Applications
| HEV/EV Inverter Phase Current Sensing | Electric Power Steering (EPS) Motor Control |
|---|---|
Use Scenario: Real-time measurement of high-frequency AC phase currents in traction inverters using SiC MOSFETs switching at >20 kHz. IC Role / Device Role / Timing Role: Linear Hall-effect current sensor providing isolated, high-bandwidth analog feedback to gate driver control loop. Use Value: 240 kHz bandwidth captures fast current transients; ±1% sensitivity accuracy over temperature reduces torque ripple and improves efficiency mapping. |
Use Scenario: Closed-loop current control of brushless DC motor in column-assist EPS systems operating at ambient temperatures up to 150°C. IC Role / Device Role / Timing Role: Primary current feedback sensor interfacing directly with MCU ADC, with built-in fault diagnostics. Use Value: Factory TC eliminates thermal drift compensation code; broken-ground detection meets ASIL-B diagnostic coverage requirements. |
| Automotive DC-DC Converter Feedback | Onboard Charger (OBC) Isolated Current Monitoring |
Use Scenario: High-side current sensing in 48 V–12 V bidirectional DC-DC converters for mild hybrid architectures. IC Role / Device Role / Timing Role: Ratiometric analog sensor delivering stable output despite input rail fluctuations and thermal cycling. Use Value: Adjustable quiescent output (0.4–0.6 VCC) enables optimal ADC utilization; output clamps flag overcurrent events before MOSFET failure. |
Use Scenario: Secondary-side current monitoring in transformer-isolated OBC topologies where galvanic isolation and compact size are critical. IC Role / Device Role / Timing Role: Thin-profile (1 mm) SIP-packaged Hall sensor mounted directly on PCB near current-carrying trace. Use Value: 4-pin SIP footprint minimizes board area; AEC-Q100 qualification ensures reliability in 10+ year automotive service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable linear Hall-effect sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| A1367LKTTN-2B-T | Identical package, pinout, and sensitivity range (1.3–2.9 mV/G); same factory TC and EEPROM architecture; LAST TIME BUY status (July 31, 2024). | Same functional use in HEV inverter/EPS; requires immediate procurement planning due to imminent discontinuation. | Select only for existing production continuity; not for new designs; verify stock availability and lead time with distributor. |
| ACS724LLCTR-20AU-T | Integrated current conductor; fixed 20 A range; 80 kHz bandwidth; no user programming; SOIC-8 package; ±1.5% total error. | Limited to lower-bandwidth applications; no field-programmable offset/sensitivity; unsuitable for high-dynamic-range EPS or SiC inverter use. | Use only where bandwidth <100 kHz suffices and PCB layout allows integrated conductor; avoid where programmability or 240 kHz response is required. |
Compared with A1367LKTTN-2U-T, the A1367LKTTN-2B-T offers identical performance and drop-in compatibility but carries LAST TIME BUY constraints, while the ACS724LLCTR-20AU-T trades programmability and bandwidth for simplicity and integrated current path - making it viable only in cost-sensitive, lower-performance legacy systems.
Availability
A1367LKTTN-2U-T is available at Aetrix Electronics and suitable for HEV inverter current sensing, electric power steering (EPS) motor control, and automotive DC-DC converter feedback requiring stable component supply despite end-of-life status.
Supply support for A1367LKTTN-2U-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 and manufacturer of high-performance magnetic sensing and power ICs, specializing in automotive-grade Hall-effect sensors, motor drivers, and current sensors.
The A1367 product line was developed specifically for high-accuracy, high-bandwidth current sensing in demanding automotive powertrain applications - emphasizing factory temperature compensation, programmability, and AEC-Q100 reliability.
FAQ
Is A1367LKTTN-2U-T still available for purchase?
Yes, A1367LKTTN-2U-T is available through Aetrix Electronics for legacy design support and production continuity, though it is officially discontinued by Allegro MicroSystems as of September 30, 2024. No new samples are available, and long-term supply requires proactive inventory planning and traceable sourcing verification for each lot.
What is the exact sensitivity range programmed into A1367LKTTN-2U-T?
The A1367LKTTN-2U-T is factory configured with SENS_COARSE = 01, giving it a guaranteed sensitivity range of 1.3–2.9 mV/G at 25°C. This range is fixed and cannot be altered post-factory without risking temperature compensation degradation beyond specification limits.
Can A1367LKTTN-2U-T be reprogrammed by the end user?
Yes, the A1367LKTTN-2U-T supports customer programming of quiescent output voltage (VOUT(Q)) and fine sensitivity trim via voltage pulses on VCC and VOUT pins. However, coarse sensitivity bits (SENS_COARSE) are factory-set and must not be changed - doing so invalidates the factory temperature compensation and causes ΔSensTC to exceed ±2%.
What does "TN leadform" mean for A1367LKTTN-2U-T?
TN leadform refers to the straight-pin configuration of the 4-pin SIP package used in A1367LKTTN-2U-T, where all leads extend vertically from the same side of the package body. This differs from TH (through-hole bent) leadform and ensures compatibility with standard wave-solder or selective soldering processes in automotive PCB assembly.
Does A1367LKTTN-2U-T include reverse-battery protection?
Yes, A1367LKTTN-2U-T incorporates an on-board supply regulator with reverse-battery protection, allowing it to withstand –15 V reverse supply voltage without damage. This feature is essential for automotive environments where battery polarity reversal may occur during jump-start procedures or service operations.
A1367LKTTN-2U-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 4-SIP Module
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Hall Effect
- Axis:
- Single
- Output Type:
- Analog Voltage
- Sensing Range:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Supply (Max):
- 16.5mA
- Current - Output (Max):
- 10mA
- Resolution:
- -
- Bandwidth:
- 240kHz
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Features:
- Programmable
- Supplier Device Package:
- 4-SIP
- Mounting Type:
- Through Hole
A1367LKTTN-2U-T FAQ
1.How can I place an order for A1367LKTTN-2U-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A1367LKTTN-2U-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 A1367LKTTN-2U-T reliable?
The price and inventory of A1367LKTTN-2U-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1367LKTTN-2U-T is usually 5 days.
3.What payment methods are accepted for A1367LKTTN-2U-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1367LKTTN-2U-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A1367LKTTN-2U-T?
A1367LKTTN-2U-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A1367LKTTN-2U-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 A1367LKTTN-2U-T?
For technical support, including A1367LKTTN-2U-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1367LKTTN-2U-T requirements.
6.How does Aetrix verify that A1367LKTTN-2U-T is sourced from the original manufacturer or authorized distributors?
All A1367LKTTN-2U-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 A1367LKTTN-2U-T meets industry standards.
7.What is the process for return or replacement of A1367LKTTN-2U-T?
All A1367LKTTN-2U-T units undergo pre-shipment inspection (PSI). If there is an issue with A1367LKTTN-2U-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 A1367LKTTN-2U-T part is unused and in its original packaging.
Return procedure for A1367LKTTN-2U-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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