FS72X

FS72XY

This datasheet contains new product information.

Feeling Technology reserves the rights to modify the product specification without notice.

No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.

Rev1.2 June. 29, 2009

P.2

FEELING

TECHNOLOGY

Pin Connection.

Figure 2

Pin Descriptions

Name

I/O

FS72X

FS72XY

Description

VDD

P

1

1

Positive power supply

VSS

G

2

3

Ground

NO

O

3

2

Driver output

Legend: I=input, O=output, I/O=input/output, P=power supply, G=ground

Functional Descriptions

Refer to the block diagram (Figure.1), FS72X/FS72XY is composed of the following building blocks:

Bias generator

The bias generator provides precise, temperature- and process-insensitive bias references for the analog blocks.

These references guarantee proper operation of the chip under all conditions specified in this specification.

Oscillator + Sequencer

The built-in oscillator provides the clock signal, which is taken by the sequencer to generate the sequential signals

necessary for both the Hall sensor and the digital control logics

Power on Reset

Used to detect the power-up ramp and reset the digital circuits to attain correct operation as soon as the power is

ready.

Chopper Amplifier

To achieve a higher magnetic sensitivity the chopper amplifier structure is adopted in this design. Use of this

structure dynamically removes both the offset and flicker noise at the same time.

Digital control logics

Generates controlling signals for the Hall sensor.

NO

VSS

VDD

1

2

3

Mark

Side

FS72XY

FS72X

Top

View

3

1

2