Allegro MicroSystems CT430 XtremeSense™ TMR Sensors
Allegro MicroSystems CT430 XtremeSense™ TMR Sensors are high bandwidth and ultra-low noise integrated contact current sensors. The Allegro CT430 utilizes the patented XtremeSense TMR technology to enable high-accuracy current measurements for many consumer and industrial applications. The CT430 Sensors support eight current ranges. The integrated current-carrying conductor (CCC) handles up to 65A of current and generates a current measurement as a linear analog output voltage. The device delivers a total output error of less than ±1.0% full-scale (FS) over-voltage and the full temperature range. The CT430 Sensors achieve 1MHz bandwidth and 300ns response time. High signal-to-noise (SNR) with ultra-low noise of 9mARMS. Integrated common-mode field rejection of -54 dB to ensure stray fields do not impact measurements in the working application.
Allegro CT430 XtremeSense TMR sensors offer an integrated over-current detection (OCD) circuitry to identify out-of-range currents (OCD) with the result outputted to the fault-bar (FLT) pin. The FLT is an open drain, an active LOW digital signal that the CT430 activates to alert the microcontroller that a fault condition has occurred.
Features
- Integrated contact current sensing for low to medium current ranges:
- 0A to +20A
- -20A to +20A
- 0A to +30A
- -30A to +30A
- 0A to +50A
- -50A to +50A
- Integrated CCC
- Linear analog output voltage
- Total error output <±1.0% FS, -40°C to +125°C
- 1MHz bandwidth
- Response time <1.0µs
- Reference voltage output for AC/DC current measurements
- VOUT to VREF <1.0% (Typical)
- Low noise performance
- <0.5mA/G immunity to common-mode fields
- OCD
- Out-of-range currents
- 16-lead SOIC-wide package
Applications
- Solar/power inverters
- Smart appliances
- Motors and generators
- UPS, SMPS, and telecom power
- Battery management
- Power utility
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Associated Products
Allegro MicroSystems CT431 XtremeSense® TMR Sensors
High bandwidth and ultra-low noise integrated contact current sensors.
Allegro MicroSystems CT432 & CT433 XtremeSense® TMR Current Sensors
Integrated contact current sensors with high bandwidth and ultra-low noise.
Allegro MicroSystems CT450 XtremeSense® TMR Sensors
High bandwidth and low noise integrated contactless current sensors.
Related Development Tool
Allegro MicroSystems ACSEVB-MA16-LA16 Evaluation Board
Evaluates Allegro current sensors in a lab environment without needing a custom circuit board.