AS5046ASST datasheet(2/33 Pages) AMSCO

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AS5046 Programmable 360° Magnetic Angle Encoder – Preliminary Data Sheet

Revision 1.1

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Page 2 of 33

4 Pin Configuration

MagRngn

Prog

VSS

SDA

SCL

CSn

VDD5V

DACref

DACout

Vout

Mode

VDD3V3

Figure 3: AS5046 pin configuration SSOP16

Package = SSOP16 (16 lead Shrink Small Outline Package)

Symbol

Type

Description

MagRngn

DO_OD

Magnet Field Magnitude RaNGe warning;

active low, indicates that the magnetic

field strength is outside of the

recommended limits.

Mode

DI_PD,

Mode input. Select between low noise

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

Internal pull-down resistor

CSn

DI_PU,

Chip Select, active low; Schmitt-Trigger

input, internal pull-up resistor (~50k

Ω).

Must be connected to VSS for serial data

transmission.

SCL

DI,ST

Serial Clock Line.Clock input for 2-wire

serial data transmission

must be left unconnected

SDA

DIO

Serial Data Line. Bi-directional I/O for 2-

wire serial data transmission

VSS

Negative Supply Voltage (GND)

Prog

DI_PD

OTP Programming Input.

Internal pull-down resistor (~74k

Ω).

Should be connected to VSS if

programming is not used

DACref

DAC Reference voltage input for external

reference

DACout

DAC output (unbuffered, Ri ~8k

Ω)

Feedback, OPAMP inverting input

Vout

OPAMP output

Must be left unconnected

VDD3V3

3V-Regulator Output for internal core,

regulated from VDD5V.Connect to

VDD5V for 3V supply voltage. Do not

load externally.

VDD5V

Positive Supply Voltage, 3.0 to 5.5 V

Table 1: Pin description SSOP16

DO_OD digital output open drain

supply pin

DI_PD

digital input pull-down

DO_T digital output /tri-state

DI_PU

digital input pull-up

schmitt-trigger input

analog input

analog output

digital input

4.1

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 10.

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

serial data transmission over the 2-wire interface. A

“logic high” at CSn forces output SDA to digital tri-state.

Pin 4 SCL (Serial Clock) is the clock input for data

transmission over the 2-wire serial interface

Pin 6 SDA (Serial Data Line) is the serial data input /

output line during data transmission over the 2-wire

interface

Pin 8 PROG is used to program the different operation

modes, as well as the zero-position in the OTP register.

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.

Access to this pin allows various OPAMP configurations.

Pin 12 Vout is the analog output pin. The analog output

is a DC voltage, ratiometric to VDD5V (3.0 – 5.5V) or an

external voltage source and proportional to the angle.

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