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Home > Products > Sensors, Transducers > Magnetic Sensors > Linear, Compass (ICs)

Allegro MicroSystems A1367LKTTG-2B-T

Name: A1367LKTTG-2B-T
Brand: Allegro MicroSystems
SKU: A1367LKTTG-2B-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: A1367LKTTG-2B-T

Manufacturer:: Allegro MicroSystems

Category:: Linear, Compass (ICs)

Package:: 4-SSIP Formed Leads

Datasheet:: A1367LKTTG-2B-T.pdf

Description:: PROGRAMMABLE LINEAR W/REVERSE BA

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Product details

Overview

A1367LKTTG-2B-T from Allegro MicroSystems is a programmable linear Hall-effect current sensor IC designed for high-accuracy, high-bandwidth current 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 (V_OUT(Q)) with <±10 mV drift across temperature. It is deployed in HEV inverter phase-leg monitoring, DC–DC converter current feedback, and electric power steering (EPS) motor phase current sensing.

For engineers reviewing the A1367LKTTG-2B-T datasheet, A1367LKTTG-2B-T pinout, A1367LKTTG-2B-T application, or A1367LKTTG-2B-T equivalent, key selection criteria include its 1.3–2.9 mV/G coarse sensitivity range, 4-pin SIP (KT) package with NC pin, ratiometric output behavior, broken-ground detection, and AEC-Q100 qualification for under-hood use.

Technical Context

The A1367LKTTG-2B-T implements proprietary segmented linear temperature compensation in digital domain using on-chip EEPROM, enabling flat sensitivity and offset across –40°C to 150°C without sacrificing analog signal path integrity. Its 240 kHz bandwidth is sustained via chopper stabilization and optimized packaging, not digital filtering.

It integrates a BiCMOS interface with dynamic offset cancellation, low-noise amplifier, regulated supply with reverse-battery protection, and user-programmable V_OUT(Q) (adjustable to ~50% or ~10% of V_CC) and sensitivity (0.6–6.4 mV/G), all configured via V_CC/V_OUT pin programming sequences.

Key Specifications

Parameter	Value and Actual Design Meaning
Bandwidth	240 kHz nominal – enables real-time current control in fast-switching SiC/GaN inverters without phase lag.
Sensitivity Range	1.3–2.9 mV/G (SENS_COARSE = 01) – factory-set range optimized for mid-range current sensing with minimal TC drift.
Operating Temp	–40°C to +150°C – supports placement near power modules in HEV/EPS systems without external thermal shielding.
Accuracy	±1% typical sensitivity error over full temperature range – achieved via factory-programmed digital TC and EEPROM-trimmed offset.
Output Type	Ratiometric analog voltage – scales with V_CC, simplifying ADC interfacing and eliminating reference voltage dependency.
Package	4-pin SIP (KT), 1 mm case thickness – ultra-thin profile for space-constrained PCB layouts in automotive ECUs.
Protection	Built-in broken-ground detection, output clamps (0.15–4.85 V), reverse-battery protection – enhances system-level fault resilience.

Pinout & Package

Package: 4-pin Single In-line Package (SIP), suffix KT, Pb-free with 100% matte-tin leadframe plating, 1 mm maximum case thickness.

Pin/Terminal	Circuit Role	Design Meaning
1: V_CC	Power input & programming interface	Supplies internal regulator (4.5–5.5 V); used with V_OUT for customer programming of sensitivity and quiescent output.
2: V_OUT	Analog output & programming interface	Provides ratiometric voltage proportional to magnetic field; dual-use pin enables in-system calibration without dedicated programming hardware.
3: NC	No-connect terminal	Internally unconnected; must be tied to GND per datasheet for optimal ESD immunity and noise performance.
4: GND	Reference ground	Return path for supply and output; includes broken-wire detection circuitry that asserts diagnostic state if open-circuited.

Key Features

Feature	Design Value
Proprietary digital temperature compensation	Factory-programmed EEPROM-based TC achieves <±2% ΔSens_TC over –40°C to 150°C, eliminating need for external compensation circuits.
User-programmable quiescent output	V_OUT(Q) adjustable from 0.4–0.6 V (unidirectional) or 2.35–2.65 V (bidirectional) at 5 V supply, enabling optimal ADC utilization in diverse current-sense topologies.
High-resolution sensitivity trim	9-bit fine programming resolution (±0.5 × Step_SENS) allows <±0.01 mV/G tuning within factory-set coarse range, supporting precise gain matching across production units.
Integrated diagnostics	Real-time broken-ground detection and configurable output clamps provide fail-safe signaling for ISO 26262 ASIL-B–capable system monitoring.
Low-noise analog path	1.4 mG/√Hz noise density and 12.6 mV_p-p output noise at 240 kHz enable sub-ampere current resolution in high-bandwidth applications.

Applications

HEV Inverter Phase Current Sensing	DC–DC Converter Output Current Monitoring
Use Scenario: Real-time measurement of high-frequency phase currents in 400 V traction inverters using shunt-based or flux-gate-assisted closed-loop configurations. IC Role / Device Role / Timing Role: Primary analog current sensor providing isolated, high-fidelity feedback to gate driver control loop with <2.2 µs response time. Use Value: Enables stable PWM control at >20 kHz switching frequencies while maintaining <1% current error across thermal cycling, critical for torque ripple reduction.	Use Scenario: Continuous monitoring of output current in 12 V/48 V bidirectional DC–DC converters for vehicle energy management systems. IC Role / Device Role / Timing Role: High-bandwidth analog front-end delivering ratiometric voltage to MCU ADC for closed-loop regulation and overcurrent shutdown. Use Value: 240 kHz bandwidth captures transient load steps without aliasing; ratiometric output eliminates need for precision voltage reference, reducing BOM cost.
Electric Power Steering (EPS) Motor Phase Sensing	Onboard Charger (OBC) Input Current Feedback
Use Scenario: Compact, high-reliability current sensing in EPS motor control modules mounted directly on steering column assemblies. IC Role / Device Role / Timing Role: Bidirectional current transducer with 50% V_CC quiescent point, interfaced to safety MCU for torque assist calculation and fault detection. Use Value: AEC-Q100 Grade 0 qualification and 150°C operation allow direct mounting near motor windings; broken-ground detection satisfies ASIL-C diagnostic coverage requirements.	Use Scenario: Input-side current monitoring in 6.6 kW OBCs to regulate grid-side power factor and detect AC line faults during charging cycles. IC Role / Device Role / Timing Role: High-accuracy analog sensor feeding isolated sigma-delta ADC, supporting IEC 61851-compliant charge control algorithms. Use Value: ±1% sensitivity accuracy over temperature ensures consistent power metering across ambient conditions; output clamps provide deterministic fault reporting during short-circuit events.

HEV Inverter Phase Current Sensing

DC–DC Converter Output Current Monitoring

Use Scenario: Real-time measurement of high-frequency phase currents in 400 V traction inverters using shunt-based or flux-gate-assisted closed-loop configurations.

IC Role / Device Role / Timing Role: Primary analog current sensor providing isolated, high-fidelity feedback to gate driver control loop with <2.2 µs response time.

Use Value: Enables stable PWM control at >20 kHz switching frequencies while maintaining <1% current error across thermal cycling, critical for torque ripple reduction.

Use Scenario: Continuous monitoring of output current in 12 V/48 V bidirectional DC–DC converters for vehicle energy management systems.

IC Role / Device Role / Timing Role: High-bandwidth analog front-end delivering ratiometric voltage to MCU ADC for closed-loop regulation and overcurrent shutdown.

Use Value: 240 kHz bandwidth captures transient load steps without aliasing; ratiometric output eliminates need for precision voltage reference, reducing BOM cost.

Electric Power Steering (EPS) Motor Phase Sensing

Onboard Charger (OBC) Input Current Feedback

Use Scenario: Compact, high-reliability current sensing in EPS motor control modules mounted directly on steering column assemblies.

IC Role / Device Role / Timing Role: Bidirectional current transducer with 50% V_CC quiescent point, interfaced to safety MCU for torque assist calculation and fault detection.

Use Value: AEC-Q100 Grade 0 qualification and 150°C operation allow direct mounting near motor windings; broken-ground detection satisfies ASIL-C diagnostic coverage requirements.

Use Scenario: Input-side current monitoring in 6.6 kW OBCs to regulate grid-side power factor and detect AC line faults during charging cycles.

IC Role / Device Role / Timing Role: High-accuracy analog sensor feeding isolated sigma-delta ADC, supporting IEC 61851-compliant charge control algorithms.

Use Value: ±1% sensitivity accuracy over temperature ensures consistent power metering across ambient conditions; output clamps provide deterministic fault reporting during short-circuit events.

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable Hall-effect current sensor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ACS724LLCTR-20AU-T	Fixed 20 A range, integrated conductor, lower bandwidth (80 kHz), no user programming of V_OUT(Q) or sensitivity.	Best for cost-sensitive, lower-bandwidth applications where factory-calibrated fixed-range sensing suffices.	Select ACS724 when board space permits integrated conductor and design does not require field-programmable gain or offset.
TLE4971-2K12M	Higher bandwidth (300 kHz), but limited temperature range (–40°C to 125°C), no EEPROM-based TC, and requires external programming interface.	Suitable for industrial motor drives where extended temperature is not required and external programming infrastructure exists.	Choose TLE4971 only if 300 kHz bandwidth is mandatory and system can accommodate external programming hardware and thermal derating above 125°C.

Compared with ACS724LLCTR-20AU-T and TLE4971-2K12M, the A1367LKTTG-2B-T uniquely combines factory-temperature-compensated programmability, 240 kHz bandwidth, and AEC-Q100 Grade 0 qualification in a 4-pin SIP-enabling compact, high-accuracy current sensing in thermally aggressive automotive power stages without external components or programming tools.

Availability

A1367LKTTG-2B-T is available at Aetrix Electronics and suitable for HEV inverter monitoring, DC–DC converter feedback, and electric power steering (EPS) applications requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100 compliance.

Supply support for A1367LKTTG-2B-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 markets.

The A1367 product line is engineered for high-precision, high-bandwidth current sensing in demanding automotive power electronics-including traction inverters, EPS, and onboard chargers-where accuracy, thermal stability, and functional safety are critical.

FAQ

What is the sensitivity range programmed into the A1367LKTTG-2B-T?

The A1367LKTTG-2B-T is factory-programmed with SENS_COARSE = 01, yielding a sensitivity range of 1.3–2.9 mV/G. This range is optimized for mid-scale current sensing applications and is temperature-compensated at the Allegro factory to minimize drift. Users may perform fine trimming within this range using the 9-bit sensitivity programming interface, but altering the coarse bits is not recommended as it degrades temperature compensation performance. The A1367LKTTG-2B-T maintains ±2% max ΔSens_TC across –40°C to 150°C within this factory-set configuration.

Does the A1367LKTTG-2B-T support both unidirectional and bidirectional current sensing?

Yes, the A1367LKTTG-2B-T supports both modes via customer programming of its quiescent output voltage (V_OUT(Q)). In bidirectional configuration, V_OUT(Q) is set near 50% of V_CC (2.35–2.65 V at 5 V supply), enabling symmetric positive/negative field response. In unidirectional mode, V_OUT(Q) is set near 10% of V_CC (0.4–0.6 V), reserving full output swing for one polarity. This flexibility is implemented entirely through V_CC/V_OUT pin programming-no external components or firmware are required. The A1367LKTTG-2B-T's architecture ensures both configurations retain full 240 kHz bandwidth and temperature-stable performance.

How is temperature compensation implemented in the A1367LKTTG-2B-T?

Temperature compensation in the A1367LKTTG-2B-T is performed digitally using factory-programmed EEPROM lookup tables and segmented linear interpolation. Sensitivity and quiescent output are compensated independently across –40°C to 150°C, with TC coefficients (TC_SENS ≈ 0 %/°C, TC_QVO ≈ 0 mV/°C) stored in nonvolatile memory. Compensation occurs in the digital domain prior to DAC conversion, preserving the 240 kHz analog signal path. The A1367LKTTG-2B-T achieves <±2% sensitivity drift and <±15 mV V_OUT(Q) drift over temperature without requiring external calibration or host processor intervention.

What protection features are integrated into the A1367LKTTG-2B-T?

The A1367LKTTG-2B-T integrates multiple hardware-level protections: reverse-battery protection on V_CC (withstands –15 V), broken-ground detection on the GND pin (asserts diagnostic voltage level if open), and programmable output voltage clamps (0.15–4.85 V). It also includes supply Zener clamping (18–21 V), ESD robustness (±4.5 kV HBM), and short-circuit tolerant output stage (10 mA sink, 2.8 mA source). These features eliminate the need for external protection circuitry in automotive environments and directly support ASIL-B diagnostic requirements. All protections operate autonomously-no software or external components are needed for the A1367LKTTG-2B-T to maintain safe operation.

Is the A1367LKTTG-2B-T pin-compatible with other variants in the A1367 family?

Yes, all A1367 variants-including A1367LKTTG-2B-T, A1367LKTTN-1B-T, and A1367LKTTN-5B-T-share identical 4-pin SIP (KT) packaging and pinout (V_CC, V_OUT, NC, GND). Mechanical and electrical pin compatibility is guaranteed across the family, enabling drop-in replacement for sensitivity range changes during design iteration or qualification. However, coarse sensitivity programming (SENS_COARSE bits) and factory TC data differ per variant, so reprogramming is required to match original calibration. The A1367LKTTG-2B-T maintains full functional equivalence with other KT-package A1367 parts in layout, thermal, and interface design.

A1367LKTTG-2B-T Specifications

Product attributes: Attribute value

Manufacturer:: Allegro MicroSystems

Series:: -

Package/Case:: 4-SSIP Formed Leads

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):: 16.25mA

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

A1367LKTTG-2B-T FAQ

1.How can I place an order for A1367LKTTG-2B-T through Aetrix?

Please submit a Request for Quotation (RFQ) for A1367LKTTG-2B-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 A1367LKTTG-2B-T reliable?

The price and inventory of A1367LKTTG-2B-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1367LKTTG-2B-T is usually 5 days.

3.What payment methods are accepted for A1367LKTTG-2B-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1367LKTTG-2B-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for A1367LKTTG-2B-T?

A1367LKTTG-2B-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your A1367LKTTG-2B-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 A1367LKTTG-2B-T?

For technical support, including A1367LKTTG-2B-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1367LKTTG-2B-T requirements.

6.How does Aetrix verify that A1367LKTTG-2B-T is sourced from the original manufacturer or authorized distributors?

All A1367LKTTG-2B-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 A1367LKTTG-2B-T meets industry standards.

7.What is the process for return or replacement of A1367LKTTG-2B-T?

All A1367LKTTG-2B-T units undergo pre-shipment inspection (PSI). If there is an issue with A1367LKTTG-2B-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 A1367LKTTG-2B-T part is unused and in its original packaging.

Return procedure for A1367LKTTG-2B-T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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