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AS5163

Datasheet - Application In form atio n

8 Application Information

The benefits of AS5163 are as follows:

Unique fully differential patented solution

Best protection for automotive applications

Easy to program

Flexible interface selection PWM, analog output

Ideal for applications in harsh environments due to contactless position sensing

Robust system, tolerant to magnet misalignment, airgap variations, temperature variations and external magnetic fields

No calibration required because of inherent accuracy

High driving capability of analog output (including diagnostics)

8.1 Programming the AS5163

The AS5163 programming is a one-time-programming (OTP) method, based on polysilicon fuses. The advantage of this method is that no

additional programming voltage is needed. The internal LDO provides the current for programming.

The OTP consists of 128 bits, wherein several bits are available for user programming. In addition, factory settings are stored in the OTP

memory. Both regions are independently lockable by built-in lock bits.

A single OTP cell can be programmed only once. By default, each cell is “0”; a programmed cell will contain a “1”. While it is not possible to reset

a programmed bit from “1” to “0”, multiple OTP writes are possible, as long as only unprogrammed “0”-bits are programmed to “1”.

Independent of the OTP programming, it is possible to overwrite the OTP register temporarily with an OTP write command. This is possible only

if the user lock bit is not programmed.

Due to the programming over the output pin, the device will initially start in the communication mode. In this mode, the digital angle value can be

read with a specific protocol format. It is a bidirectional communication possible. Parameters can be written into the device. A programming of the

device is triggered by a specific command. With another command (pass2funcion), the device can be switched into operation mode (analog or

PWM output). In case of a programmed user lock bit, the AS5163 automatically starts up in the functional operation mode. No communication of

the specific protocol is possible after this.

8.1.1 Hardware Setup

The pin OUT and the supply connection are required for OTP memory access. Without the programmed Mem_Lock_USER OTP bit, the device

startup. Figure 1 shows the configuration of an AS5163.

Figure 11. Programming Schematic of the AS5163

VDD3

GND

VDD5

GNDA

2.2µF

(low ESR)

0.3 ohm

OUT

VDD

SENSOR PCB

Programmer

2.2µF

(low ESR)

1µF

KDOWN

VDD

GNDD GNDP

VDD

GND

DIO

AS5163