Product Overview
The CT455 is a high-bandwidth, low-noise contactless current sensor utilizing Allegro's XtremeSense TMR technology for high-accuracy current measurements. It offers two standard field ranges and a user-programmable variant for end-of-line calibration of gain and offset. The device features a < 300 ns output response time, ~6 mA current consumption, and a 1 MHz bandwidth, making it suitable for consumer, enterprise, and industrial applications such as solar/power inverters, battery management systems, industrial equipment, power utility meters, power conditioners, and DC-DC converters. It is available in 8-lead SOIC and TSSOP green, RoHS-compliant packages.
Product Attributes
- Brand: Allegro MicroSystems
- Technology: XtremeSense Tunnel Magnetoresistance (TMR)
- Certifications: RoHS Compliant, AEC-Q100 Grade 1 (A variants only)
- Package Types: 8-lead SOIC, 8-lead TSSOP
- Environmental Compliance: Green, RoHS Compliant
Technical Specifications
| Feature | Specification | Details |
|---|---|---|
| Bandwidth | 1 MHz | |
| Output Response Time | < 300 ns | |
| Current Consumption | ~6 mA | |
| Supply Voltage | 3.3 V or 5 V | |
| Magnetic Field Ranges (Preset) | 6 mT, 48 mT | |
| Magnetic Field Ranges (Programmable) | 6 to 8 mT, 12 to 48 mT | |
| Output Type | Linear Analog Voltage | |
| Package Options | 8-lead SOIC, 8-lead TSSOP | |
| Operating Temperature Range | -40C to 125C | Extended Industrial |
| dV/dt Optimization | Optimized for high dV/dt applications | (A variants only) |
| Power-On Time (tON) | 100 s (typ) | |
| Rise Time (tRISE) | 200 ns (typ) | |
| Propagation Delay (tDELAY) | 250 ns (typ) | |
| Undervoltage Lockout (UVLO) | Rising: 2.5 V (typ), Falling: 2.45 V (typ) | |
| Bypass Capacitor | 1 F | Recommended for VCC pin |
| Programming Interface | One-Time Programming (OTP) via TEST pin | Requires 3.3V VCC for test mode |
| Model Variants | CT455-A06B5-TS08 | AEC-Q100 Grade 1, Bipolar, 6 mT, 5V, TSSOP |
| CT455-H06B5-TS08 | (No AEC-Q100 Grade 1), Bipolar, 6 mT, 5V, TSSOP | |
| CT455-A48B5-TS08 | AEC-Q100 Grade 1, Bipolar, 48 mT, 5V, TSSOP | |
| CT455-H48B5-TS08 | (No AEC-Q100 Grade 1), Bipolar, 48 mT, 5V, TSSOP | |
| CT455-A00B3-TS08 | AEC-Q100 Grade 1, Programmable, Bipolar, 3.3V, TSSOP | |
| CT455-H00B3-TS08 | (No AEC-Q100 Grade 1), Programmable, Bipolar, 3.3V, TSSOP | |
| CT455-A00B5-TS08 | AEC-Q100 Grade 1, Programmable, Bipolar, 5V, TSSOP | |
| CT455-H00B5-TS08 | (No AEC-Q100 Grade 1), Programmable, Bipolar, 5V, TSSOP | |
| CT455-A00U5-TS08 | AEC-Q100 Grade 1, Programmable, Unipolar, 5V, TSSOP | |
| CT455-H00U5-TS08 | (No AEC-Q100 Grade 1), Programmable, Unipolar, 5V, TSSOP | |
| CT455-A00B5-SN08 | AEC-Q100 Grade 1, Programmable, Bipolar, 5V, SOIC | |
| CT455-H00B5-SN08 | (No AEC-Q100 Grade 1), Programmable, Bipolar, 5V, SOIC |
2510091532_ALLEGRO-CT455-H48B5-TS08_C39471014.pdf
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