AP1355AEM

Overview

The AP1355AEM is a specialized amplifier IC designed for Hall elements, integrating a built-in current source and amplifier. It operates with supply voltages of ±13.5V to ±16.5V and functions within a temperature range of -40°C to 105°C. The device features an adjustable Hall driving current of approximately 5mA at 25°C and offers selectable amplifier gains of ×180 or ×95 via pin configuration. It includes an offset calibration circuit with a typical range of ±1.85V and accuracy of ±2.0mV. A built-in 5.0V voltage reference supports external DACs, while the output drive capability reaches ±10mA in a 16-pin TSSOP package.

Feature Summary

• Integrates a precision current source for Hall element excitation and a high-gain measurement amplifier.
• Provides adjustable offset calibration to correct DC errors after system installation.
• Includes a stable internal voltage reference to power external digital-to-analog converters.
• Features selectable gain settings and thermal protection circuits.

Applications

• Amplification and signal conditioning for Hall effect sensors
• Calibration of Hall element characteristics in motor control systems
• Integration with external DACs for precise sensor biasing

Procurement Notes

Verify component status as this part may be obsolete or not recommended for new designs. Confirm availability through authorized distributors and check for product change notifications. Ensure compatibility with existing system requirements before procurement.

Selection Notes

Select this component when designing circuits requiring integrated amplification and current sourcing for Hall elements. Consider the specific gain requirements (×180 or ×95) and the need for external offset calibration via DAC. Verify that the operating voltage and temperature ranges align with the target application environment.

Part Context

The AP1355AEM belongs to Asahi Kasei Microdevices' portfolio of specialized analog interface circuits. It is engineered specifically for magnetic sensing applications, combining multiple functional blocks into a single package to simplify system design and improve signal integrity for Hall-based measurements.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.

FAQ

How is the amplifier gain configured?

The gain can be set to either ×180 or ×95 by shorting or leaving open the connection between the TR1 and TR2 pins.

What is the function of the VREF pin?

The VREF pin outputs a stable 5.0V reference voltage, which is intended to supply power to an external DAC used for controlling the offset calibration and current setting.

How is the Hall element driving current determined?

The driving current is set by the voltage applied to the VISET pin and the resistance value connected to the ISET pin, following the formula IIHALL = (VVISET / RISET) × 3.