FD170H

Rev1.0 May. 08, 2009

P.2

FEELING

TECHNOLOGY

Pin Connection

Marking Distinguish

Figure.2

Figure.3

Pin Descriptions

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

Functional Descriptions

Refer to the block diagram (Figure.1), FD170H 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 IC under all conditions specified in this specification.

Timers

The timers provide the lock shutdown and re-start time and propagation delay time counting.

Output drivers

The output drivers include totem-pole MOS transistors and output voltage clamping functions.

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 Logic

Hall sensor part – generates magnetic pole signals from the Hall-effect sensor.

Driver part – generates switching signals to the output drivers.

Detector part – detects the output transient status.

Name

I/O

FD170H

Description

VDD

P

1

Positive Power Supply

NO

O

2

Driver Output 1

SO

O

3

Driver Output 2

VSS

G

4

Ground

170

1

2

3

4

YMV-XX

Lot Number

170

YMV- XX

Mass Production Version

Half month (ex :A,B ~ X)

Year (ex:2008

8)