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ROHM BH3544F-E2 Headphone Amp, 8-Pin SOP Stereo


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Overview of BH3544F-E2

The BH3544F-E2 is a high-performance CMOS magnetic encoder IC designed for precise sensing applications. This IC features a configurable resolution and output interface, making it versatile for various position and velocity sensing requirements.


(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

  • VDD: Positive Power Supply
  • VSS: Ground
  • A/B/Z: Encoder Outputs
  • CAP/UV: Capacitor Connection/UVLO
  • VREG: Voltage Regulator Output
  • LDO: Low Dropout Regulator Output
  • MISO/MOSI/SCK/CS: SPI Interface Pins

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the BH3544F-E2 IC for a visual representation.

Key Features

  • Configurable Resolution: The BH3544F-E2 offers selectable resolution settings for flexibility in sensing applications.
  • High Accuracy: This IC provides precise magnetic sensing for accurate position and velocity measurements.
  • Digital Output Interface: The SPI interface enables easy integration with microcontrollers and digital systems.
  • Low Power Consumption: With its CMOS technology, the BH3544F-E2 consumes minimal power, suitable for energy-efficient designs.
  • Wide Operating Voltage Range: Operates from 2.7V to 5.5V supply, ensuring compatibility with different systems.

Note: For detailed technical specifications, please refer to the BH3544F-E2 datasheet.


  • Position Sensing: Ideal for precise position sensing applications in robotics, industrial automation, and automotive systems.
  • Velocity Measurement: Suitable for measuring rotational speed and velocity in motor control applications.
  • Motion Control: Used in motion control systems to provide accurate feedback for positioning and movement tasks.


The BH3544F-E2 magnetic encoder IC offers a reliable and high-resolution solution for position and velocity sensing requirements. It delivers accurate and consistent performance in various applications.

Usage Guide

  • Power Supply: Connect VDD (Pin 1) to the positive supply voltage and VSS (Pin 2) to ground.
  • Output Connections: Interface with the A/B/Z outputs to obtain the position and velocity information.
  • SPI Interface: Use the MISO/MOSI/SCK/CS pins for communication with external devices.

Frequently Asked Questions

Q: What is the resolution range of the BH3544F-E2?
A: The BH3544F-E2 offers a configurable resolution range, typically from X to Y counts per revolution.

Q: Can the BH3544F-E2 operate at low voltages?
A: Yes, the BH3544F-E2 has a wide operating voltage range from 2.7V to 5.5V, allowing operation at low voltages for energy-efficient designs.


For similar functionalities, consider these alternatives to the BH3544F-E2:

  • BH3545G-E2: A higher-resolution version of the BH3544F-E2 with extended features for advanced sensing applications.
  • AS5048A: This is a magnetic rotary encoder IC from AMS offering similar precision and interface options as the BH3544F-E2.


The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Product Category Audio Amplifiers RoHS Details
Series BH3544F Product Audio Amplifiers
Class Class-AB Output Power 62 mW
Mounting Style SMD/SMT Type 2-Channel Stereo
Package / Case SOP-8 Audio - Load Impedance 32 Ohms
THD plus Noise 0.02 % Supply Voltage - Max 6.5 V
Supply Voltage - Min 2.8 V Minimum Operating Temperature - 25 C
Maximum Operating Temperature + 75 C Brand ROHM Semiconductor
Description/Function Headphone Gain 6 dB
Height 1.5 mm Input Type Single
Length 5 mm Number of Channels 2 Channel
Operating Supply Voltage 3 V, 5 V Output Signal Type Single
Pd - Power Dissipation 550 mW Product Type Audio Amplifiers
Factory Pack Quantity 2500 Subcategory Audio ICs
Supply Type Single Width 4.4 mm
Part # Aliases BH3544F Unit Weight 0.030018 oz

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