AS5035 – 64 PPR INCREMENTAL MAGNETIC ROTARY ENCODER

Revision 1.5

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AS5035

Sin

Cos

Ang

Mag

MagINCn

MagDECn

Channel A

Channel B

Index

VDD5V

VDDV3V

OTP_CLK

OTP_DO

PROG

CSn

LDO 3.3V

Hall Array

&

Frontend

Amplifier

OTP

Zero

Position

DSP

Incremental

Decoder

Figure 3: AS5035 Block diagram

4.1

Pin List & Description

Pin #

SSOP16

Name

Type

AS5035

1

MagInc

DO_OD

Mag. Field indicator

2

MagDec

DO_OD

Mag. Field indicator

3

A

DO

Quadrature channel A

4

B

DO

Quadrature channel B

5

N.C.

test

Must be left open

6

Index

DO

Incremental Index output

7

VSS

Supply

Supply Ground

8

Prog

DI , pd

OTP Programming Input. Internal pull-down resistor

(~74k

Ω).

Should be connected to VSS if not used

9

OTP_DO

DO_T

Data Output for Zero Position programming

10

OTP_CLK

DI,ST

Clock Input for Zero Position programming; Schmitt-

Trigger input. Should be connected to VSS if not used

11

CSn

DI_ST, pu

Enable outputs A,B,I (see 5.4). Connect to VSS for

normal operation

12

N.C.

test

Must be left open

13

N.C.

test

Must be left open

14

N.C.

test

Must be left open

15

VDD3V3

Supply

3V regulator output

16

VDD5V

Supply

5V positive supply input

Table 1: Pin description

DO_OD : digital output, open drain

DO

: digital push/pull output

DI

: digital input

ST

: Schmitt-Trigger input

pu

: internal pull-up resistor

pd

: internal pull-down resistor

test

: pin is used for factory testing, must be left unconnected

4.2

Unused Pins

Pins # 5, 8, 12, 13 and 14 are for factory testing and must be left unconnected

Pins# 8, 9 and 10 are used for OTP Zero Position Programming only. In normal operation, they can be left open or connected to

VSS (pins 8 and 10 only)