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Allegro MicroSystems CTD415-30DC
- Part No.:
- CTD415-30DC
- Manufacturer:
- Allegro MicroSystems
- Category:
- Sensor Evaluation Boards
- Package:
- Datasheet:
-
CTD415-30DC.pdf
- Description:
- EVAL BOARD FOR CT415
- Quantity:
- Payment:
- Shipping:
Inventory:1,029
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Product details
Overview
CTD415-30DC from Allegro MicroSystems is a high-bandwidth, ultra-low-noise contact current sensor using XtremeSense™ TMR technology. It delivers linear analog voltage output for 0–30 A unidirectional current sensing with ±3.0% full-scale total output error, 1 MHz bandwidth, and 300 ns response time-designed for battery management systems and motor control in industrial and automotive applications.
For engineers reviewing the CTD415-30DC datasheet, CTD415-30DC pinout, CTD415-30DC application, or CTD415-30DC equivalent, this page provides verified specifications, isolation ratings, noise performance at 100 kHz, filter-capable architecture, and AEC-Q100 Grade 1 qualification for design-in decisions.
Technical Context
The CTD415-30DC integrates a current-carrying conductor (CCC) rated for up to 65 A peak, with internal TMR sensing elements and analog front-end processing delivering a ratiometric linear output voltage. Its architecture supports unidirectional operation with 0.50 V quiescent output and 133.3 mV/A sensitivity.
It features built-in common-mode field immunity (–40 dB), UL/IEC 62368-1 certified reinforced isolation (280 VRMS working voltage), and a dedicated FILTER pin connected to an internal 15 kΩ resistor for external RC noise filtering-enabling configurable bandwidth without sacrificing signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Range | 0 to 30 A unidirectional - supports primary-side sensing in DC-fed inverters and BMS shunt replacement |
| Sensitivity | 133.3 mV/A - enables precise low-current resolution (e.g., 75 mA per LSB with 10-bit ADC) |
| Total Output Error | ±3.0% FS - includes linearity, offset, sensitivity, and lifetime drift across –40°C to 125°C |
| Bandwidth | 1.0 MHz - supports fast transient detection in motor phase current or overcurrent fault protection |
| Response Time | 300 ns - ensures sub-microsecond current monitoring for real-time protection logic |
| Noise Density | 10.0 mARMS @ 100 kHz - optimized for high-SNR measurement in noisy power electronics environments |
| Supply Voltage | 4.75–5.50 V - compatible with standard 5 V rails and tolerant of automotive battery fluctuations |
| Isolation Rating | 2.5 kVRMS dielectric withstand - certified to UL 1577 and IEC 62368-1 for reinforced insulation |
Pinout & Package
The CTD415-30DC is housed in an industry-standard green, RoHS-compliant 8-lead SOIC package (4.89 mm × 6.00 mm × 1.62 mm) with creepage and clearance ≥4 mm for reinforced isolation compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | IP+ | Positive input primary conductor - carries sensed current into integrated CCC |
| 3, 4 | IP− | Negative input primary conductor - completes current path through CCC; not signal ground |
| 5 | GND | Analog ground reference - must be tied to system signal ground, isolated from power ground |
| 6 | FILTER | RC filter node - connects to external capacitor to set cutoff frequency; internal 15 kΩ resistor |
| 7 | OUT | Analog output voltage - linear 0.50–4.50 V range representing 0–30 A; drives ≤100 pF load |
| 8 | VCC | Power supply input - requires 1.0 µF bypass capacitor (X5R) close to pin per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| XtremeSense™ TMR Sensing | Enables ultra-low-noise, high-accuracy current measurement without magnetic core saturation or hysteresis |
| Integrated Current-Carrying Conductor | Eliminates external shunt resistors and associated power loss; supports up to 65 A peak current |
| Reinforced Isolation Certification | UL 1577 + IEC 62368-1 compliant with 280 VRMS working voltage - suitable for safety-critical automotive and industrial systems |
| Dedicated FILTER Pin | Allows external RC network to reduce high-frequency noise while preserving 1 MHz small-signal bandwidth |
| AEC-Q100 Grade 1 Qualification | Validated for operation from –40°C to +125°C ambient - qualified for under-hood automotive use |
| Common-Mode Field Immunity | –40 dB rejection - maintains accuracy in proximity to high-current busbars or switching nodes |
Applications
| Battery Management Systems | Motor Control |
|---|---|
Use Scenario: Monitoring charge/discharge current in 48 V EV auxiliary batteries and energy storage units. IC Role / Device Role / Timing Role: Primary-side unidirectional current sensor providing analog feedback to MCU-based state-of-charge algorithms. Use Value: 300 ns response enables cycle-by-cycle overcurrent detection during fast transients; ±3.0% FS error supports accurate Coulomb counting over temperature. | Use Scenario: Phase current sensing in BLDC motor drives for HVAC compressors and industrial pumps. IC Role / Device Role / Timing Role: High-bandwidth analog current monitor feeding ADC inputs for FOC (field-oriented control) loops. Use Value: 1 MHz bandwidth captures PWM-edge harmonics; integrated CCC eliminates shunt thermal drift and PCB layout complexity. |
| Solar Inverters | UPS & Telecom Power Supplies |
Use Scenario: DC-link current monitoring in string inverters and microinverters handling up to 30 A DC input. IC Role / Device Role / Timing Role: Isolated current sensor on high-voltage DC side, interfacing with isolated gate drivers and protection ICs. Use Value: 2.5 kVRMS isolation rating meets IEC 62109 requirements; 10.0 mARMS noise floor ensures clean MPPT algorithm inputs. | Use Scenario: Input/output current monitoring in modular UPS systems and 48 V telecom rectifiers. IC Role / Device Role / Timing Role: Secondary-side current sensor for load balancing and redundancy management in parallel PSUs. Use Value: AEC-Q100 Grade 1 reliability ensures long-term stability in 24/7 operation; FILTER pin allows noise tailoring for EMI-sensitive environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar contact current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CT418-30DC | Successor device with same 0–30 A range, improved ±1.5% FS total error, and enhanced noise performance (8.5 mARMS @ 100 kHz) | Designed for new designs; supports same SOIC-8 footprint but requires updated layout for revised thermal pad and GND routing | Select CT418-30DC for new designs requiring extended product lifecycle and tighter accuracy. |
| ACS724LLCTR-30AB-T | Allegro Hall-effect sensor; ±30 A bidirectional range, 400 kHz bandwidth, ±1.5% typical total error, no integrated FILTER pin | Lower bandwidth limits use in high-speed switching applications; lacks reinforced isolation certification (only basic isolation) | Choose ACS724LLCTR-30AB-T only if bidirectional sensing and lower cost outweigh need for 1 MHz bandwidth and reinforced isolation. |
Compared with CTD415-30DC, CT418-30DC offers better accuracy and longer availability for new designs, while ACS724LLCTR-30AB-T trades isolation robustness and speed for cost and simplicity in non-safety-critical applications.
Availability
CTD415-30DC is available at Aetrix Electronics and suitable for battery management systems, motor control, solar inverters, and UPS power supplies requiring stable component supply amid ongoing obsolescence transition planning.
Supply support for CTD415-30DC 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 CT415 product line delivers high-accuracy, isolated contact current sensors using proprietary XtremeSense™ TMR technology-designed specifically for demanding current measurement in power conversion, traction, and energy storage systems.
FAQ
What is the operating temperature range for CTD415-30DC?
The CTD415-30DC is qualified for operation from –40°C to +125°C ambient temperature and meets AEC-Q100 Grade 1 requirements. This range is validated across all electrical parameters including total output error, sensitivity, and offset voltage drift, making CTD415-30DC suitable for under-hood automotive and industrial environments where thermal stress is significant.
Does CTD415-30DC require an external shunt resistor?
No, CTD415-30DC does not require an external shunt resistor. It integrates a current-carrying conductor (CCC) capable of handling up to 65 A peak current, enabling direct in-line current sensing. The CCC's 1 mΩ resistance minimizes power loss and eliminates shunt-related thermal drift, PCB space, and Kelvin connection complexity-key advantages over discrete shunt+amplifier solutions.
What isolation certifications apply to CTD415-30DC?
CTD415-30DC is certified to UL 1577 and IEC 62368-1 for reinforced isolation, with a rated dielectric withstand voltage of 2.5 kVRMS (60 s) and a working voltage of 280 VRMS. Creepage and clearance distances are ≥4 mm, and internal distance through isolation is 110 µm-meeting safety requirements for industrial and automotive applications requiring reinforced insulation.
How does the FILTER pin function in CTD415-30DC?
The FILTER pin in CTD415-30DC connects to an internal 15 kΩ resistor, forming an RC low-pass filter when an external capacitor is added. This allows designers to reduce high-frequency noise on the OUT pin without compromising the base 1 MHz bandwidth. For example, a 100 pF capacitor sets ~106 MHz cutoff, while 1000 pF yields ~10.6 MHz-tailoring noise rejection to specific EMI environments.
Is CTD415-30DC recommended for new designs?
No-CTD415-30DC is classified as "Not for New Design" effective March 28, 2025. While still in production for existing customer applications, Allegro recommends transitioning to CT418-30DC for new designs due to its improved accuracy (±1.5% FS), extended lifecycle, and enhanced noise performance. CTD415-30DC samples are no longer available.
CTD415-30DC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- XtremeSense™ Crocus Technology
- Packaging:
- Bulk
- Product Status:
- Active
- Sensor Type:
- Current Sensor
- Sensing Range:
- 30A
- Interface:
- Analog
- Sensitivity:
- 133.3mV/A
- Voltage - Supply:
- 4.75V ~ 5.5V
- Embedded:
- No
- Contents:
- Board(s)
- Utilized IC / Part:
- CT415
CTD415-30DC FAQ
1.How can I place an order for CTD415-30DC through Aetrix?
Please submit a Request for Quotation (RFQ) for CTD415-30DC 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 CTD415-30DC reliable?
The price and inventory of CTD415-30DC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CTD415-30DC is usually 5 days.
3.What payment methods are accepted for CTD415-30DC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CTD415-30DC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CTD415-30DC?
CTD415-30DC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CTD415-30DC 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 CTD415-30DC?
For technical support, including CTD415-30DC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CTD415-30DC requirements.
6.How does Aetrix verify that CTD415-30DC is sourced from the original manufacturer or authorized distributors?
All CTD415-30DC 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 CTD415-30DC meets industry standards.
7.What is the process for return or replacement of CTD415-30DC?
All CTD415-30DC units undergo pre-shipment inspection (PSI). If there is an issue with CTD415-30DC, 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 CTD415-30DC part is unused and in its original packaging.
Return procedure for CTD415-30DC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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