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Allegro MicroSystems ACS70311LOKATX-010B5-C
- Part No.:
- ACS70311LOKATX-010B5-C
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- 4-SSIP Formed Leads
- Datasheet:
-
ACS70311LOKATX-010B5-C.pdf
- Description:
- HIGHEST ACCURACY PROGRAMMABLE LI
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ACS70311LOKATX-010B5-C from Allegro MicroSystems is a programmable linear Hall-effect current sensor IC designed for core-based current sensing in automotive inverters and DC-DC converters. It delivers ±1% sensitivity error, ±5 mV offset error over –40°C to 150°C, 240 kHz bandwidth, 2 µs response time, and integrated undervoltage detection (UVD) for diagnostic compliance.
For engineers reviewing the ACS70311LOKATX-010B5-C datasheet, ACS70311LOKATX-010B5-C pinout, ACS70311LOKATX-010B5-C application, or ACS70311LOKATX-010B5-C equivalent, this page provides verified technical context, package mapping, real-world application cards, and two validated alternative parts with documented functional and selection differences.
Technical Context
The ACS70311LOKATX-010B5-C integrates a proprietary Hall element with BiCMOS signal conditioning, dynamic offset cancellation, and segmented linear temperature compensation. Its architecture includes an onboard supply regulator with reverse-battery protection, programmable output clamps, and broken-ground detection logic.
It supports low-voltage programming (≤ VCC), UVD with 4.2 V nominal threshold and 250 mV hysteresis, and ratiometric output behavior configurable per application ADC interface requirements. The device operates across DC to 240 kHz with propagation delay ≤1.65 µs and slew rate ≥410 V/ms under 10 kΩ load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensitivity Range | 5.5–11.5 mV/G - factory-trimmed to 10 mV/G; enables precise scaling for ±150 G full-scale current sensing with core |
| Bandwidth | DC to 240 kHz - supports high-frequency switching in SiC/GaN-based automotive inverters |
| Response Time | 2.1–3 µs - ensures accurate capture of fast current transients in motor phase-leg monitoring |
| Operating Temp | –40°C to 150°C - qualified to AEC-Q100 Grade 0 for under-hood and traction inverter placement |
| UVD Threshold | 4.2 V (typ), 250 mV hysteresis - triggers diagnostic flag before system brown-out affects control loop stability |
| Supply Voltage | 4.5–5.5 V - compatible with standard automotive 5 V rail; survives ±18 V on VCC due to internal regulator |
| Output Clamps | VCLP_H = 4.7 V, VCLP_L = 0.3 V - provides short-circuit fault indication without external circuitry |
Pinout & Package
ACS70311LOKATX-010B5-C uses the 4-pin SIP OK package (1 mm case thickness, TX leadform), optimized for current-sensing modules with enhanced mechanical robustness and solder joint reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VCC | Power input & programming supply | Accepts 4.5–5.5 V; withstands ±18 V transient; powers internal regulator and EEPROM during programming |
| 2: VOUT | Analog output & programming data line | Delivers ratiometric voltage proportional to magnetic flux; used with Manchester protocol for trim calibration |
| 3: PROG_EN | Low-voltage programming enable | Pulled low to enter programming mode; eliminates need for >VCC voltages; improves ESD robustness when tied to GND |
| 4: GND | Reference ground & broken-wire detection node | Open-circuit detection triggers VBRK_H/VBRK_L output states for fail-safe diagnostics |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed TC | ±1% sensitivity error and ±5 mV offset error maintained from –40°C to 150°C via segmented linear compensation |
| Undervoltage detection | Dedicated UVD circuit with 4.2 V threshold and 250 mV hysteresis - enables early warning before MCU reset threshold |
| Low-voltage programming | Full trim capability using only VCC (no auxiliary voltage required) - simplifies production test fixtures and field calibration |
| Reverse battery protection | Withstands –18 V on VCC - eliminates need for external TVS or diode in 12 V/24 V automotive systems |
| Broken ground detection | GND pin open-circuit forces VOUT to 0.1–0.2 V (pull-down) or 4.8–5.0 V (pull-up) - provides unambiguous fault signature |
Applications
| Motor Phase Current Sensing | Onboard Charger (OBC) Current Monitoring |
|---|---|
Use Scenario: Real-time measurement of high-frequency phase currents in 3-phase traction inverters using toroidal cores. IC Role / Device Role / Timing Role: Linear Hall-effect sensor providing analog output synchronized to PWM switching at up to 240 kHz. Use Value: 2 µs response time and 240 kHz bandwidth ensure accurate current reconstruction during fast SiC FET transitions. | Use Scenario: Bidirectional current sensing in isolated DC-DC stages of EV onboard chargers for energy flow direction and efficiency optimization. IC Role / Device Role / Timing Role: Core-based analog current transducer interfacing directly to precision ADC with ratiometric scaling. Use Value: ±1% sensitivity error and ±5 mV offset error over –40°C to 150°C maintain accuracy across thermal cycling in compact OBC enclosures. |
| Traction Inverter DC Link Monitoring | 12 V System Load Diagnostics |
Use Scenario: High-side DC link current sensing in dual-motor drive systems where isolation and bandwidth are critical. IC Role / Device Role / Timing Role: Isolated current sensor IC with reverse-battery protection and UVD, mounted directly on busbar. Use Value: ±18 V VCC survivability and undervoltage detection enable reliable operation during load dump and cold-crank events. | Use Scenario: Fault-tolerant current monitoring of high-current 12 V subsystems (e.g., HVAC blower, ADAS ECUs) requiring ASIL-B compliance. IC Role / Device Role / Timing Role: Diagnostic-ready current sensor with broken-ground detection and programmable output clamps. Use Value: Open-GND detection and output clamping provide immediate hardware-level fault signaling without software polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable Hall-effect current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ACS70310LKTATN-010B5-C | Lacks UVD and low-voltage programming; uses KT package with thinner leads; no PROG_EN pin (NC/GND instead) | Not suitable for ASIL-B diagnostic requirements; requires external programming voltage >VCC; less robust in module-level assembly | Select only if UVD and simplified programming are not required and KT package form factor is preferred |
| ACS70311LKTATN-010B5-C | Same functionality and specs, but uses KT package (TH/TG/TN leadforms); identical pinout except PROG_EN replaces NC/GND | Better suited for PCB-mounted designs; lower profile than OK package; less ideal for busbar-integrated modules | Choose for surface-mount applications where mechanical vibration tolerance is needed but module integration is not required |
Compared with ACS70310LKTATN-010B5-C, the ACS70311LOKATX-010B5-C adds mandatory diagnostics (UVD, broken-GND) and simplifies production programming; compared with ACS70311LKTATN-010B5-C, it trades PCB footprint for enhanced mechanical retention and thermal performance in current-sensing modules.
Availability
ACS70311LOKATX-010B5-C is available at Aetrix Electronics and suitable for automotive traction inverters, onboard chargers, and 12 V system diagnostics requiring stable component supply, AEC-Q100 Grade 0 qualification, and long-term lifecycle continuity.
Supply support for ACS70311LOKATX-010B5-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 global leader in motion control and energy-efficient power solutions, specializing in Hall-effect sensors, motor drivers, and power ICs for automotive and industrial markets.
The ACS70311 product line delivers programmable, high-bandwidth, diagnostic-ready current sensing for next-generation electric vehicle power electronics - emphasizing AEC-Q100 compliance, core-based accuracy, and production-line programmability.
FAQ
What is the factory-programmed sensitivity of ACS70311LOKATX-010B5-C?
The ACS70311LOKATX-010B5-C is factory-programmed to a nominal sensitivity of 10 mV/G, within a customer-programmable range of 5.5–11.5 mV/G. This value is set during final test and enables precise scaling for ±150 G full-scale magnetic field input when used with a ferromagnetic core. The device maintains ±1% sensitivity error across –40°C to 150°C due to segmented linear temperature compensation.
Does ACS70311LOKATX-010B5-C support bidirectional current sensing?
Yes, ACS70311LOKATX-010B5-C supports bidirectional current sensing. Its quiescent output voltage is factory-set to 2.5 V at 5 V supply, enabling symmetric positive/negative current measurement around that midpoint. The device's magnetic polarity response - south pole increasing VOUT, north pole decreasing VOUT - is defined in the functional block diagram and confirmed by its B-directional suffix 'B5' in the part number.
What package type does ACS70311LOKATX-010B5-C use, and how does it differ from KT?
ACS70311LOKATX-010B5-C uses the OK package - a 4-pin SIP variant with longer, thicker leads optimized for current-sensing modules and busbar mounting. Unlike the KT package, OK offers improved mechanical retention and thermal dissipation (RθJA = 177°C/W vs. 174°C/W), and is only available with TX leadform. The OK package is exclusive to ACS70311 variants and supports the PROG_EN pin function.
How does the undervoltage detection (UVD) feature work in ACS70311LOKATX-010B5-C?
The UVD circuit in ACS70311LOKATX-010B5-C monitors VCC and asserts a diagnostic condition when voltage falls below 4.2 V (typical), with 250 mV hysteresis. It activates within 64 µs of threshold breach and deactivates after 1.4 µs once VCC recovers. This feature is exclusive to ACS70311 devices and provides early warning before system brown-out compromises control-loop integrity in automotive applications.
Can ACS70311LOKATX-010B5-C be programmed in-system without external voltage sources?
Yes, ACS70311LOKATX-010B5-C supports true low-voltage programming: all trim operations - including sensitivity, offset, and clamp settings - are performed using only the VCC supply (4.5–5.5 V), with no need for auxiliary programming voltages. The PROG_EN pin enables this mode and eliminates risk of overvoltage damage during calibration, making it suitable for automated end-of-line testing and field reconfiguration.
ACS70311LOKATX-010B5-C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 4-SSIP Formed Leads
- 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):
- -
- Resolution:
- -
- Bandwidth:
- 240kHz
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Features:
- Temperature Compensated
- Supplier Device Package:
- 4-SIP
- Mounting Type:
- Through Hole
ACS70311LOKATX-010B5-C FAQ
1.How can I place an order for ACS70311LOKATX-010B5-C through Aetrix?
Please submit a Request for Quotation (RFQ) for ACS70311LOKATX-010B5-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 ACS70311LOKATX-010B5-C reliable?
The price and inventory of ACS70311LOKATX-010B5-C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ACS70311LOKATX-010B5-C is usually 5 days.
3.What payment methods are accepted for ACS70311LOKATX-010B5-C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ACS70311LOKATX-010B5-C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ACS70311LOKATX-010B5-C?
ACS70311LOKATX-010B5-C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ACS70311LOKATX-010B5-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 ACS70311LOKATX-010B5-C?
For technical support, including ACS70311LOKATX-010B5-C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ACS70311LOKATX-010B5-C requirements.
6.How does Aetrix verify that ACS70311LOKATX-010B5-C is sourced from the original manufacturer or authorized distributors?
All ACS70311LOKATX-010B5-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 ACS70311LOKATX-010B5-C meets industry standards.
7.What is the process for return or replacement of ACS70311LOKATX-010B5-C?
All ACS70311LOKATX-010B5-C units undergo pre-shipment inspection (PSI). If there is an issue with ACS70311LOKATX-010B5-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 ACS70311LOKATX-010B5-C part is unused and in its original packaging.
Return procedure for ACS70311LOKATX-010B5-C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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