[AK8777B]

MS1465-E-00

September 2012

2

Figure 1. Block diagram

Table 1. Circuit configuration

Block

Function

REGULATOR

Generate internal operating voltage.

HALL SENSORS

Two Hall elements fabricated by CMOS process.

CHOPPER_SW

Perform chopping in order to cancel the offset of Hall sensor.

CHOP_AMP

Amplifies two Hall sensor output voltage with summation and subtraction circuit.

COMP

Hysteresis comparator.

BIAS

Generates bias current to internal circuits.

HE_DRIVE

Generates bias current for Hall sensors.

OSC

Generates operating clock.

TIMING LOGIC

Generates timing signal for internal circuits.

LATCH & LOGIC

Logical circuits and open drain driver.

Block Diagram

Circuit Configuration

REGULATOR

BIAS

HE_DRIVE

OSC

TIMING

LOGIC

CHOP_AMP

COMP

VREG

VDD

VSS

OUTA

OUTB

HALL SENSORS