Allegro XtremeSense CT426 TMR Current Sensor
Product Overview
The Allegro XtremeSense CT426 is a high-bandwidth, ultra-low noise integrated contact current sensor designed for high-accuracy current measurements. Leveraging Allegro's patented XtremeSense TMR technology, this sensor enables precise current sensing across various industrial, consumer, and automotive applications. It supports eight current ranges, with an integrated current-carrying conductor (CCC) capable of handling up to 65 A. The device provides a linear analog output voltage and achieves a total output error of less than 1.0% full-scale (FS). With a fast response time of approximately 300 ns and immunity to common mode fields, the CT426 is an ideal solution for applications requiring reliable and accurate current monitoring.
Product Attributes
- Brand: Allegro MicroSystems
- Technology: XtremeSense TMR
- Package: 8-lead SOIC
- Compliance: Green and RoHS compliant
- Certifications: UL/IEC 62368-1 and UL1577
- Automotive Qualification: AEC-Q100 Grade 1
Technical Specifications
| Model/Specification | Description/Value | Unit |
|---|---|---|
| Product Name | XtremeSense TMR Current Sensor with Ultra-Low Noise and <1% Total Error | |
| Part Number | CT426 | |
| Current Carrying Conductor (CCC) Max Current | 65 | A |
| Total Output Error (EOUT) | < 1.0 | % FS |
| Bandwidth | 1.0 | MHz |
| Response Time | ~300 | ns |
| Supply Voltage | 3.0 to 3.6 | V |
| Supply Current | ~6.0 (Typ.) | mA |
| Common Mode Field Rejection Ratio (CMFRR) | -54 | dB |
| Rated Isolation Voltage | 3.5 kVRMS | |
| Working Voltage (Basic Isolation) | 560 VRMS | |
| Working Voltage (Reinforced Isolation) | 280 VRMS | |
| Package Dimensions | 4.89 mm 6.00 mm 1.62 mm | |
| Operating Temperature Range | -40 to 125 | C |
| Noise (eN @ 100 kHz) | 9.5 to 19.0 | mARMS |
| Power-On Time (tON) | 100 (Typ.) | s |
| Rise Time (tRISE) | 200 (Typ.) | ns |
| Propagation Delay (tDELAY) | 250 (Typ.) | ns |
| Undervoltage Lockout (UVLO) | 2.45 / 2.50 | V |
| Models (Examples) | ||
| CT426-HSN820MR | 20 A Range | |
| CT426-HSN830MR | 30 A Range | |
| CT426-HSN850MR | 50 A Range | |
| CT426-HSN865MR | 65 A Range | |
| CT426-HSN820DR | 0 to 20 A Range | |
| CT426-HSN830DR | 0 to 30 A Range | |
| CT426-HSN850DR | 0 to 50 A Range | |
| CT426-HSN865DR | 0 to 65 A Range | |
| CT426-ASN820MR | 20 A Range (AEC-Q100 Grade 1) | |
| CT426-ASN830MR | 30 A Range (AEC-Q100 Grade 1) | |
| CT426-ASN850MR | 50 A Range (AEC-Q100 Grade 1) | |
| CT426-ASN865MR | 65 A Range (AEC-Q100 Grade 1) | |
| CT426-ASN820DR | 0 to 20 A Range (AEC-Q100 Grade 1) | |
| CT426-ASN830DR | 0 to 30 A Range (AEC-Q100 Grade 1) | |
| CT426-ASN850DR | 0 to 50 A Range (AEC-Q100 Grade 1) | |
| CT426-ASN865DR | 0 to 65 A Range (AEC-Q100 Grade 1) |
Note: The CT426 is classified as NOT FOR NEW DESIGN. Sales are restricted to existing customer applications. Obsolescence in the near future is probable.
2509221739_ALLEGRO-CT426-HSN850MR_C27454597.pdf
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