AS5043 datasheet(2/26 Pages) AMSCO

Part #	AS5043

Description	PROGRAMMABLE 360째 MAGNETIC ANGLE ENCODER WITH ABSOLUTE SSI AND ANALOG OUTPUTS

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Manufacturer	AMSCO [ams AG]

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AS5043 Programmable 360° Magnetic Angle Encoder

Revision 1.4, 04-Apr-06

www.austriamicrosystems.com

Page 2 of 26

5 Pin Configuration

Figure 2: AS5043 pin configuration SSOP16

Package = SSOP16 (16 lead Shrink Small Outline Package)

Symbol

Type

Description

1

MagRngn

DO_OD

Magnet Field Magnitude RaNGe warning;

active low, indicates that the magnetic

field strength is outside of the

recommended limits.

2

Mode

DI_PD,

ST

Mode input. Select between low noise

(open, low) and high speed (high) mode.

Internal pull-down resistor

3

CSn

DI_PU,

ST

Chip Select, active low; Schmitt-Trigger

input, internal pull-up resistor (~50k

Ω)

4

CLK

DI,ST

Clock Input of Synchronous Serial

Interface; Schmitt-Trigger input

5

NC

-

must be left unconnected

6

DO

DO_T

Data Output of Synchronous Serial

Interface

7

VSS

S

Negative Supply Voltage (GND)

8

Prog_DI

DI_PD

OTP Programming Input and Data Input

for Daisy Chain mode. Internal pull-down

resistor (~74k

Ω).

Should be connected to VSS if

programming is not used

9

DACref

AI

DAC Reference voltage input for external

reference

10

DACout

AO

DAC output (unbuffered, Ri ~8k

Ω)

11

FB

AI

Feedback, OPAMP inverting input

12

Vout

AO

OPAMP output

13

NC

-

Must be left unconnected

14

NC

-

Must be left unconnected

15

VDD3V3

S

3V-Regulator Output for internal core,

regulated from VDD5V.Connect to

VDD5V for 3V supply voltage. Do not

load externally.

16

VDD5V

S

Positive Supply Voltage, 3.0 to 5.5 V

Table 1: Pin description SSOP16

DO_OD digital output open drain S

supply pin

DI_PD

digital input pull-down

DO_T digital output /tri-

state

DI_PU

digital input pull-up

ST

schmitt-trigger

input

AI

analog input

AO

analog output

DI

digital input

5.1

Pin Description

Pins 7, 15 and 16 are supply pins, pins 5, 13 and 14

are for internal use and must be left open.

Pin 1 is the magnetic field strength indicator,

MagRNGn. It is an open-drain output that is pulled to

VSS when the magnetic field is out of the

recommended range (45mT to 75mT). The chip will

still

continue

to

operate,

but

with

reduced

performance, when the magnetic field is out of range.

When this pin is low, the analog output at pins #10

and #12 will be 0V to indicate the out-of-range

condition.

Pin 2 MODE allows switching between filtered (slow)

and unfiltered (fast mode). See section 9.

Pin 3 Chip Select (CSn; active low) selects a device

for serial data transmission over the SSI interface. A

“logic high” at CSn forces output DO to digital tri-

state.

Pin 4 CLK is the clock input for serial data

transmission over the SSI interface (see section 8)

Pin 6 DO (Data Out) is the serial data output during

data transmission over the SSI interface (see section

8)

Pin 8 PROG_DI is used to program the different

operation modes, as well as the zero-position in the

OTP register.

This pin is also used as a digital input to shift serial

data through the device in Daisy Chain Configuration,

(see page 6).

Pin 9 DACref is the external voltage reference input

for the Digital-to-Analog Converter (DAC). If selected,

the analog output voltage on pin 12 (Vout) will be

ratiometric to the voltage on this pin.

Pin10 DACout is the unbuffered output of the DAC.

This pin may be used to connect an external OPAMP,

etc. to the DAC.

Pin 11 FB (Feedback) is the inverting input of the

OPAMP buffer stage.

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