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Allegro MicroSystems ACS70310LKTALU-001B5-C
- Part No.:
- ACS70310LKTALU-001B5-C
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- 4-SSIP Module
- Datasheet:
-
ACS70310LKTALU-001B5-C.pdf
- Description:
- VERY HIGH PRECISION LINEAR HALL
- Quantity:
- Payment:
- Shipping:
Inventory:4,521
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Product details
Overview
ACS70310LKTALU-001B5-C from Allegro MicroSystems is a customer-programmable, bidirectional linear Hall-effect current sensor IC in a 4-pin SIP (KT) package. It delivers ±1% sensitivity error, ±5 mV offset error over –40°C to 150°C, 240 kHz bandwidth, and 2 µs response time for high-frequency automotive inverter current monitoring.
For engineers reviewing the ACS70310LKTALU-001B5-C datasheet, ACS70310LKTALU-001B5-C pinout, ACS70310LKTALU-001B5-C application, or ACS70310LKTALU-001B5-C equivalent, this page provides verified specifications, automotive-grade diagnostics (broken ground detection, output clamps), programmable quiescent voltage (2.5 V nominal), and factory-trimmed 1 mV/G sensitivity with temperature compensation.
Technical Context
The ACS70310LKTALU-001B5-C integrates a proprietary Hall element with BiCMOS signal conditioning, dynamic offset cancellation, and segmented linear temperature compensation. Its analog output is ratiometric to VCC and supports user programming of offset and sensitivity via Manchester-encoded pulses on VCC/VOUT pins.
It features reverse-battery protection, onboard supply regulation (±18 V survivability), undervoltage detection only in ACS70311 variants (not present here), and open-circuit GND detection. The KT package enables surface-mount assembly with mechanical vibration tolerance and 1 mm case thickness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensitivity | Factory-trimmed 1 mV/G, programmable range 0.5–1.2 mV/G - enables precise calibration for low-current sensing in DC-DC converters |
| Bandwidth | DC to 240 kHz - supports accurate measurement of fast-switching currents in SiC/GaN inverters |
| Response Time | 2.1 µs typical - ensures real-time current feedback for overcurrent protection circuits |
| Operating Temp | –40°C to 150°C - qualified for under-hood automotive applications including traction inverters |
| Quiescent Output | 2.5 V ±5 mV at 25°C, bidirectional - provides centered analog reference for ADC interfacing |
| Supply Voltage | 4.5–5.5 V - compatible with standard 5 V automotive power rails |
| Output Drive | Push-pull, 2–8 Ω DC resistance - drives 4.7–10 kΩ loads directly without external buffering |
Pinout & Package
Package: 4-pin Single In-line Package (SIP), KT suffix, 1 mm case thickness, lead-free with 100% matte tin plating. Available in TH (lead-formed) and TN (straight leads) options for surface-mount assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VCC | Power input & programming channel | Accepts 4.5–5.5 V supply; also carries Manchester-encoded programming signals |
| 2: VOUT | Analog output & programming channel | Delivers ratiometric voltage proportional to magnetic flux; shares programming interface with VCC |
| 3: NC/GND | No-connect / ESD ground tie | Must be connected to system GND for optimal ESD performance; not functional in ACS70310 |
| 4: GND | Primary reference ground | System return path; open-circuit detection triggers diagnostic output voltage shift (VBRK_L/H) |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed TC | ±1% sensitivity error and ±5 mV offset error from –40°C to 150°C - eliminates need for external calibration across automotive temperature range |
| Reverse-battery protection | VCC survives –18 V - prevents damage during jump-start or battery reversal in vehicle systems |
| Broken-ground detection | GND pin open-circuit shifts VOUT to 0–200 mV or 4.8–5 V - enables fail-safe diagnostics without additional circuitry |
| Programmable output clamps | User-configurable VCLP_H/L limits - provide short-circuit fault indication by forcing output into defined voltage bands |
| High-resolution trim | 9-bit fine offset + 2-bit coarse sensitivity control - achieves <2.87 µV/G step resolution for sub-amp current accuracy |
Applications
| Automotive Traction Inverter | On-Board Charger (OBC) |
|---|---|
Use Scenario: Real-time phase current monitoring in 800 V SiC-based EV traction inverters operating up to 240 kHz switching frequency. IC Role / Device Role / Timing Role: Bidirectional analog current sensor providing isolated, high-bandwidth feedback to gate driver control loop. Use Value: 2 µs response time and 240 kHz bandwidth enable cycle-by-cycle overcurrent protection, improving IGBT/SiC FET reliability. | Use Scenario: Primary-side DC-link current sensing in bidirectional OBC modules with active rectification and PFC stages. IC Role / Device Role / Timing Role: Core-based linear Hall sensor delivering ratiometric analog output synchronized to 5 V MCU ADC reference. Use Value: ±1% sensitivity error over –40°C to 150°C ensures consistent energy metering accuracy across ambient and self-heating conditions. |
| 48 V Mild Hybrid DC-DC Converter | Commercial Vehicle Battery Management |
Use Scenario: High-side current monitoring in 48 V/12 V bi-directional buck-boost converters for start-stop and regenerative braking. IC Role / Device Role / Timing Role: Isolated current sensor interfaced to isolated SPI ADC via analog front-end, with broken-GND fault signaling. Use Value: Open-circuit GND detection (VBRK_L/H) provides immediate fault flag without requiring secondary monitoring circuitry. | Use Scenario: Cell-string current monitoring in heavy-duty truck battery packs exposed to wide thermal cycling and mechanical vibration. IC Role / Device Role / Timing Role: Surface-mount Hall sensor mounted directly on busbar within sealed module, leveraging 1 mm thin KT package. Use Value: TH/TN leadform options and 174 °C/W thermal resistance support reliable operation in confined, convection-limited enclosures. |
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 |
|---|---|---|---|
| ACS70311LKTALU-001B5-C | Includes undervoltage detection (UVD) and low-voltage programming; backward-compatible pinout | Required where system-level UVD diagnostics or <5 V programming voltage is mandated | Select when automotive ASIL-B diagnostics demand UVD reporting or legacy 3.3 V programmers must program the device |
| TLE4971-2C5-S0001 | Integrated conductor, 5 V supply, ±1.5% total error, no user programming capability | Used in cost-sensitive, fixed-gain applications where factory calibration suffices | Choose for simplified BOM where programmability and ultra-low drift are not required |
Compared with ACS70311LKTALU-001B5-C, the ACS70310LKTALU-001B5-C omits UVD but retains identical sensitivity accuracy, bandwidth, and packaging - making it optimal for cost-constrained, non-UVD automotive subsystems. Versus TLE4971-2C5-S0001, it offers field-programmable offset/sensitivity and superior thermal stability at the expense of external core dependency.
Availability
ACS70310LKTALU-001B5-C is available at Aetrix Electronics and suitable for automotive traction inverters, on-board chargers, and 48 V mild hybrid DC-DC converters requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for ACS70310LKTALU-001B5-C 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 IC solutions, headquartered in Manchester, NH.
The ACS70310/ACS70311 product line was developed specifically for automotive-grade, core-based current sensing in high-frequency inverters and converters, emphasizing programmability, thermal stability, and integrated diagnostics.
FAQ
What is the factory-trimmed sensitivity of ACS70310LKTALU-001B5-C?
The ACS70310LKTALU-001B5-C is factory-trimmed to 1 mV/G sensitivity, with a programmable range of 0.5–1.2 mV/G. This value is encoded in the part number suffix "-001B5-C", where "001" denotes 1 mV/G and "B" indicates bidirectional operation. The trim is performed using Allegro's segmented linear temperature compensation to ensure ±1% error from –40°C to 150°C.
Does ACS70310LKTALU-001B5-C support undervoltage detection (UVD)?
No, ACS70310LKTALU-001B5-C does not include undervoltage detection. UVD is exclusive to the ACS70311 family (e.g., ACS70311LKTALU-001B5-C). The ACS70310 variant lacks the UVD circuitry and associated PROG_EN pin functionality - pin 3 is designated NC/GND and must be tied to ground solely for ESD performance.
What package type and leadform does ACS70310LKTALU-001B5-C use?
ACS70310LKTALU-001B5-C uses the KT-suffix 4-pin SIP package with 1 mm case thickness and lead-free matte tin plating. The "LU" in the part number specifies the TH leadform (lead-formed for surface-mount), enabling high mechanical robustness in vibration-prone automotive environments.
How is programming performed on ACS70310LKTALU-001B5-C?
Programming of ACS70310LKTALU-001B5-C is performed via Manchester-encoded pulses applied simultaneously to VCC and VOUT pins, using the PROG_EN pin (pin 3) as a programming enable. The device supports 9-bit fine offset and 2-bit coarse sensitivity trimming. No external programmer is needed - communication follows Allegro's Manchester protocol with defined timing windows per the ACS70310/1 datasheet.
What is the maximum magnetic field range supported by ACS70310LKTALU-001B5-C?
The ACS70310LKTALU-001B5-C supports an input magnetic field range of ±3000 G. However, full accuracy specifications (e.g., ±1% sensitivity error, ±5 mV offset) are guaranteed only up to ±300 G for 1 mV/G devices. Operation beyond ±300 G remains functional but linearity and error bounds degrade per the datasheet's LinERR specification.
ACS70310LKTALU-001B5-C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 4-SSIP Module
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Hall Effect
- Axis:
- Single
- Output Type:
- Analog Voltage
- Sensing Range:
- ±300mT
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Supply (Max):
- 15mA
- Current - Output (Max):
- 10mA
- Resolution:
- -
- Bandwidth:
- 240kHz
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Features:
- Programmable, Temperature Compensated
- Supplier Device Package:
- 4-SIP
- Mounting Type:
- Through Hole
ACS70310LKTALU-001B5-C FAQ
1.How can I place an order for ACS70310LKTALU-001B5-C through Aetrix?
Please submit a Request for Quotation (RFQ) for ACS70310LKTALU-001B5-C 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 ACS70310LKTALU-001B5-C reliable?
The price and inventory of ACS70310LKTALU-001B5-C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ACS70310LKTALU-001B5-C is usually 5 days.
3.What payment methods are accepted for ACS70310LKTALU-001B5-C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ACS70310LKTALU-001B5-C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ACS70310LKTALU-001B5-C?
ACS70310LKTALU-001B5-C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ACS70310LKTALU-001B5-C 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 ACS70310LKTALU-001B5-C?
For technical support, including ACS70310LKTALU-001B5-C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ACS70310LKTALU-001B5-C requirements.
6.How does Aetrix verify that ACS70310LKTALU-001B5-C is sourced from the original manufacturer or authorized distributors?
All ACS70310LKTALU-001B5-C 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 ACS70310LKTALU-001B5-C meets industry standards.
7.What is the process for return or replacement of ACS70310LKTALU-001B5-C?
All ACS70310LKTALU-001B5-C units undergo pre-shipment inspection (PSI). If there is an issue with ACS70310LKTALU-001B5-C, 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 ACS70310LKTALU-001B5-C part is unused and in its original packaging.
Return procedure for ACS70310LKTALU-001B5-C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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