Product Overview
The CT417 is a high-bandwidth, ultra-low noise integrated contact current sensor leveraging Allegro's XtremeSense TMR technology for high-accuracy current measurements. It supports eight current ranges, with the integrated current-carrying conductor (CCC) handling up to 65 A and providing a linear analog output voltage. The device boasts a total output error of less than 1.0% full-scale (FS), a 300 ns output response time, and immunity to common mode fields. An integrated overcurrent detection (OCD) circuitry alerts the microcontroller via an active-low fault (FLT) pin. It is offered in an industry-standard, green, RoHS-compliant 8-lead SOIC package.
Product Attributes
- Brand: Allegro MicroSystems
- Technology: XtremeSense TMR
- Package: 8-lead SOIC
- Certifications: UL/IEC 62368-1, UL1577
- Compliance: Green, RoHS compliant
- AEC-Q100 Grade: 1 (for specific variants)
Technical Specifications
| Feature/Model | Specification | Value |
|---|---|---|
| General Specifications | ||
| Bandwidth | fBW | 1.0 MHz |
| Response Time | tRESPONSE | ~300 ns |
| Current Consumption | ICC | ~6.0 mA |
| Supply Voltage | VCC | 3.0 to 3.6 V |
| Total Output Error | ETOT | < 1.0% FS (stated in overview), < 3.0% FS (stated in performance characteristics) |
| Common Mode Field Rejection Ratio | CMFRR | -40 dB |
| Overcurrent Detection (OCD) | Integrated circuitry with FLT pin output | |
| Fault Output | FLT | Open drain, active low digital signal |
| Rated Isolation Voltage | 2.5 kVRMS | |
| Working Voltage (Basic Isolation) | 560 VRMS | |
| Working Voltage (Reinforced Isolation) | 280 VRMS | |
| Low Noise | eN @ fBW = 100 kHz | 9.5 to 19.0 mARMS |
| Power-On Time | tON | 100 s (typical) |
| Rise Time | tRISE | 200 ns (typical) |
| Propagation Delay | tDELAY | 250 ns (typical) |
| Undervoltage Lockout (UVLO) | Rising: 2.50 V, Falling: 2.45 V | |
| Current Ranges & Models | ||
| Model | Current Range (IPMAX) | Sensitivity (Typ.) |
| CT417-HSN820MR / CT417-ASN820MR | 20 A | 50 mV/A |
| CT417-HSN830MR / CT417-ASN830MR | 30 A | 33.3 mV/A |
| CT417-HSN850MR-1 / CT417-HSN850MR / CT417-ASN850MR | 40 A / 50 A | 26.4 mV/A (40 A) / 20 mV/A (50 A) |
| CT417-HSN865MR / CT417-ASN865MR | 65 A | 15.4 mV/A |
| CT417-HSN820DR / CT417-ASN820DR | 0 to 20 A | 100 mV/A |
| CT417-HSN830DR / CT417-ASN830DR | 0 to 30 A | 66.7 mV/A |
| CT417-HSN850DR / CT417-ASN850DR | 0 to 50 A | 40 mV/A |
| CT417-HSN865DR / CT417-ASN865DR | 0 to 65 A | 30.8 mV/A |
| Package Dimensions (SOIC-8) | ||
| Dimension | Symbol | Min. / Typ. / Max. (mm) |
| Body Length | D | 4.80 / 4.89 / 4.98 |
| Body Width | E | 3.81 / 3.90 / 3.99 |
| Height | A | 1.52 / 1.62 / 1.72 |
| Lead Pitch | e | 1.27 BSC |
| Overall Width | H | 5.80 / 6.00 / 6.20 |
| Lead Width | b | 0.36 / 0.41 / 0.46 |
| Operating Conditions | ||
| Operating Ambient Temperature | TA | -40 to 125 C |
Applications
- Solar/power inverters
- UPS, SMPS, and telecom power supplies
- Motor control
- Power utility meter
- Overcurrent fault protection
2508151349_ALLEGRO-CT417-HSN830MR_C26583416.pdf
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