My Inquiry
My Account
Allegro MicroSystems A1343LLETR-T
- Part No.:
- A1343LLETR-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
A1343LLETR-T.pdf
- Description:
- PROGRAMMABLE LINEAR W/EEPROM, SE
- Quantity:
- Payment:
- Shipping:
Inventory:3,148
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
A1343LLETR-T from Allegro MicroSystems is a high-precision, EEPROM-programmable linear Hall-effect sensor IC with open-drain output, supporting SENT and PWM digital protocols, 12-bit resolution, 3 kHz maximum bandwidth, and –40°C to 150°C operating range-used in automotive throttle position, brake pedal, and transmission gear sensing.
For engineers reviewing the A1343LLETR-T datasheet, A1343LLETR-T pinout, A1343LLETR-T application, or A1343LLETR-T equivalent, key selection criteria include programmable magnetic input range (±100 G to ±2250 G), 32-segment output linearization, dual-mode SENT/PWM output, on-chip 1st-/2nd-order temperature compensation, and EEPROM-based gain/offset/bandwidth/clamp configuration.
Technical Context
The A1343LLETR-T integrates a Hall element, chopper-stabilized analog front-end, 12-bit ADC, and digital signal processor with configurable linearization lookup table (32 segments), programmable bandwidth (188–3000 Hz), and dual-temperature-zone (hot/cold) compensation algorithms for sensitivity and offset. Its BiCMOS monolithic architecture enables simultaneous adjustment of coarse magnetic range (SENS_COARSE), fine quiescent output (QOUT_FINE), and sensitivity multiplier (SENS_MULT).
Signal path includes analog conditioning with dynamic offset cancellation, digitization, then digital processing for SENT message formatting (SAE J2716 JAN2010 or Allegro proprietary mode) or PWM generation with ±15% period tolerance. All programmable parameters-including clamps, polarity, and linearization coefficients-are stored in on-board EEPROM with up to 100 write cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Protocol | Configurable SENT (SAE J2716 or Allegro proprietary) or PWM-enables direct interface with automotive microcontrollers without external signal conditioning. |
| Resolution | 12-bit output (0–4095 LSB in SENT mode; 0–96% duty cycle in PWM)-supports high-accuracy position feedback with <±1% linearity error after programming. |
| Bandwidth | Programmable 188–3000 Hz-tradeoff between response time (e.g., 0.35 ms propagation delay at 4 kHz update rate) and noise rejection. |
| Magnetic Range | Customer-selectable ±100 G to ±2250 G via SENS_COARSE register-optimizes ADC utilization across diverse field strengths without signal clipping. |
| Temperature Compensation | Independent 1st- and 2nd-order coefficients for sensitivity and offset, programmed separately for hot (>25°C) and cold (<25°C) zones-reduces drift to <±0.02%/°C over full range. |
| Supply Voltage | 4.5–5.5 V-compatible with standard automotive 5 V rail; includes UVLO (4.25–4.55 V) and OVLO (5.6–7.9 V) protection. |
| Operating Temp | –40°C to 150°C-AEC-Q100 Grade 0 qualified for under-hood and transmission applications. |
Pinout & Package
Package: 8-pin TSSOP (Pb-free, 100% matte-tin leadframe plating, LE suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VCC | Power supply input | 4.5–5.5 V nominal supply; internal UVLO/OVLO protection active; bypass capacitor required (10 nF typical). |
| 2,3: GND | Ground reference | Dual ground pins reduce impedance and improve noise immunity in high-EMI automotive environments. |
| 4: OUT | Open-drain output driver | Sinks up to 60 mA; supports SENT Manchester encoding or PWM; requires external pull-up (10–50 kΩ). |
| 5–8: NC | No-connect terminals | Not internally bonded; Allegro recommends grounding for mechanical stability and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| 32-segment linearization | Applies unique coefficient per segment to correct nonlinear magnetic fields-achieves <±1% linearity error without external calibration. |
| EEPROM parameter storage | Holds gain, offset, bandwidth, clamps, TC coefficients, and protocol settings-enables one-time system optimization and field reprogramming (up to 100 cycles). |
| Dual-temperature-zone TC | Separate 1st-/2nd-order coefficients for hot and cold ambient conditions-compensates non-monotonic sensitivity drift across –40°C to 150°C. |
| SENT/PWM protocol select | Single register bit switches output format-eliminates need for external protocol translators in mixed-architecture ECUs. |
| Chopper-stabilized front-end | Four-phase chopping reduces 1/f noise and offset drift-delivers stable output under mechanical stress and thermal cycling. |
Applications
| Throttle Position Sensing | Brake Pedal Position Sensing |
|---|---|
Use Scenario: Measures angular displacement of accelerator pedal shaft via back-biased magnet. IC Role / Device Role / Timing Role: Linear Hall-effect sensor providing ratiometric position feedback with SENT output synchronized to ECU clock. Use Value: 32-segment linearization corrects inherent magnet nonlinearity; programmable clamps prevent saturation during pedal overtravel. | Use Scenario: Detects travel distance of hydraulic brake master cylinder rod using side-biased magnet. IC Role / Device Role / Timing Role: High-bandwidth (3 kHz) magnetic sensor delivering real-time position data via PWM for brake-by-wire control loops. Use Value: Dual-zone temperature compensation maintains <±0.02%/°C sensitivity drift across under-hood thermal transients. |
| Transmission Gear Selector | Electric Power Steering (EPS) Torque Sensing |
Use Scenario: Monitors rotary position of PRNDL lever in automatic transmission housing. IC Role / Device Role / Timing Role: SENT-output Hall sensor interfacing directly with transmission control module for gear state validation. Use Value: EEPROM-stored magnetic range (±500 G) and offset trim match production tolerances without factory calibration. | Use Scenario: Measures torsion bar twist in EPS column using differential Hall arrangement. IC Role / Device Role / Timing Role: Precision linear sensor with 12-bit resolution feeding torque estimate to EPS motor controller. Use Value: On-chip 2nd-order TC compensates for sensitivity shift caused by motor heat soak during sustained assist. |
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 |
|---|---|---|---|
| TLV493D-A1B6 | 3D Hall sensor with I²C interface; 12-bit resolution; no SENT/PWM; lower max temp (125°C); no EEPROM linearization. | Best for 3-axis orientation sensing; unsuitable for single-axis high-linearity automotive position feedback requiring SENT. | Select only if 3D field measurement and I²C bus integration outweigh need for SENT output and advanced linearization. |
| Melexis MLX90393 | Triaxis Hall with SPI/I²C; 16-bit resolution; integrated EEPROM; no SENT/PWM; 150°C rating; no 32-segment linearization. | Preferred for multi-axis current sensing or joystick applications; lacks automotive SENT compliance and dedicated PWM mode. | Choose when triaxial field data and higher resolution are critical, and SENT protocol is not mandated by ECU architecture. |
Compared with TLV493D-A1B6 and MLX90393, the A1343LLETR-T uniquely combines SENT/PWM dual-protocol support, 32-segment hardware linearization, and AEC-Q100 Grade 0 qualification-making it the only option for high-accuracy, production-ready automotive position sensing where protocol compatibility and field nonlinearity correction are mandatory.
Availability
A1343LLETR-T is available at Aetrix Electronics and suitable for automotive throttle position, brake pedal, and transmission gear sensing requiring stable component supply across extended temperature and long product lifecycles.
Supply support for A1343LLETR-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 sensors and power ICs, specializing in automotive and industrial motion control solutions.
The A1343 product line delivers programmable linear Hall-effect sensing for demanding automotive applications-designed to replace potentiometers and resolver-based systems with contactless, high-reliability alternatives.
FAQ
What output protocols does the A1343LLETR-T support?
The A1343LLETR-T supports two configurable digital output protocols: SENT (Single Edge Nibble Transmission) compliant with SAE J2716 JAN2010 or Allegro's proprietary enhanced mode, and PWM (Pulse-Width Modulation). Protocol selection is controlled via EEPROM register PWM_MODE. SENT mode delivers 12-bit data in nibble format with programmable tick time (0.25–3 µs), while PWM mode provides duty-cycle output with ±15% period tolerance. Both modes use the same open-drain OUT pin and require an external pull-up resistor.
How is magnetic field linearity achieved in the A1343LLETR-T?
The A1343LLETR-T achieves high magnetic field linearity through on-chip 32-segment piecewise linearization. The device divides its output range into 32 equal segments and applies a unique linearization coefficient-stored in EEPROM-to each segment. This hardware-based correction compensates for nonlinearities in the magnetic circuit (e.g., magnet geometry or ferrous concentrators), enabling <±1% linearity error after programming. Unlike software-only methods, this occurs in real time within the signal path before output formatting.
What temperature compensation capabilities does the A1343LLETR-T offer?
The A1343LLETR-T provides independent, customer-programmable 1st- and 2nd-order temperature compensation for both sensitivity and magnetic offset. Coefficients are set separately for hot (>25°C) and cold (<25°C) ambient zones using dedicated EEPROM registers (TC1_SENS_HOT/CLD, TC2_SENS_HOT/CLD, TC1_OFFSET). This dual-zone approach corrects non-monotonic drift behavior, reducing sensitivity drift to <±0.02%/°C and offset drift to <±0.005%/°C across –40°C to 150°C-critical for under-hood automotive reliability.
Can the A1343LLETR-T be reprogrammed in-system?
Yes, the A1343LLETR-T supports in-system programming via its serial interface using a standard UART connection. All EEPROM parameters-including magnetic range (SENS_COARSE), fine offset (QOUT_FINE), bandwidth (BW), linearization coefficients, SENT/PWM configuration, and temperature compensation coefficients-can be written or read in the field. The device allows up to 100 EEPROM write cycles, and memory locking mechanisms prevent accidental overwrite. Programming requires sending a 16-bit access code followed by command/data packets per the Allegro serial interface protocol.
What is the package type and pin configuration of the A1343LLETR-T?
The A1343LLETR-T uses an 8-pin TSSOP package with lead-free (Pb-free) construction and 100% matte-tin leadframe plating (LE suffix). Pin 1 is VCC, pins 2 and 3 are GND, pin 4 is the open-drain OUT terminal, and pins 5–8 are no-connect (NC) terminals-Allegro recommends grounding these for mechanical stability and EMI suppression. The package meets JEDEC standards with θJA = 145°C/W on a 4-layer PCB and is rated for AEC-Q100 Grade 0 reliability.
A1343LLETR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Hall Effect
- Axis:
- Single
- Output Type:
- PWM, SENT
- Sensing Range:
- ±25mT
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Supply (Max):
- 10mA
- Current - Output (Max):
- 60mA
- Resolution:
- 12 b
- Bandwidth:
- 3kHz
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Features:
- Programmable, Temperature Compensated
- Supplier Device Package:
- 8-TSSOP
- Mounting Type:
- Surface Mount
A1343LLETR-T FAQ
1.How can I place an order for A1343LLETR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A1343LLETR-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 A1343LLETR-T reliable?
The price and inventory of A1343LLETR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1343LLETR-T is usually 5 days.
3.What payment methods are accepted for A1343LLETR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1343LLETR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A1343LLETR-T?
A1343LLETR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A1343LLETR-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 A1343LLETR-T?
For technical support, including A1343LLETR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1343LLETR-T requirements.
6.How does Aetrix verify that A1343LLETR-T is sourced from the original manufacturer or authorized distributors?
All A1343LLETR-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 A1343LLETR-T meets industry standards.
7.What is the process for return or replacement of A1343LLETR-T?
All A1343LLETR-T units undergo pre-shipment inspection (PSI). If there is an issue with A1343LLETR-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 A1343LLETR-T part is unused and in its original packaging.
Return procedure for A1343LLETR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
A1343LLETR-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…
