www.austriamicrosystems.com/AS5263

Revision 1.4

14 - 37

AS5263

Datasheet - Detailed Descr i pti on

7.2.7 Analog Output Diagnostic Mode

Due to the low pin count in the application, a wrong operation must be indicated by the output pin OUT_T, OUT_B. This could be realized using

the failure bands. The failure band is defined with a fixed level. The failure band low is specified from 0% to 4% of the supply range. The failure

band high is defined from 100% to 96%. Several failures can happen during operation. The output signal remains in these bands over the

specified operating and load conditions. All the different failures can be grouped into the internal alarms (failures) and the application related

failures.

For efficient use of diagnostics it is recommended to program to clamping levels CLL and CLH.

7.2.8 Analog Output Driver Parameters

The output stage is configured in a push-pull output. Therefore it is possible to sink and source currents.

Note:

A Pull-Up/Down load is up to 1k

Ω with increased diagnostic bands from 0%-6% and 94%-100%.

Table 8. Different Failure Cases of AS5263

Type

Failure Mode

Symbol

Failure Band

Note

Internal alarms (failures)

Out of magnetic range

(too less or too high magnetic

input)

MAGRng

High/Low

Could be switched off by one OTP bit

EXT_RANGE.

Programmable by OTP bit DIAG_HIGH

Cordic overflow

COF

High/Low

Programmable by OTP bit DIAG_HIGH

Offset compensation finished

OCF

High/Low

Programmable by OTP bit DIAG_HIGH

Watchdog fail

WDF

High/Low

Programmable by OTP bit DIAG_HIGH

Oscillator fail

OF

High/Low

Programmable by OTP bit DIAG_HIGH

Application related

failures

Overvoltage condition

OV

High/Low

Dependent on the load resistor

Pull up

→ failure band high

Pull down

→ failure band low

Broken VDD

BVDD

Broken VSS

BVSS

Short circuit output

SCO

High/Low

Switch off

→ short circuit dependent

Table 9. General Parameters for the Output Driver

Symbol

Parameter

Min

Typ

Max

Unit

Note

IOUTSCL

Short circuit output current (low side driver)

832

mA

IOUTSCH

Short circuit output current (high side driver)

-8

-32

mA

TSCDET

Short circuit detection time

20

600

µs

output stage turned off

TSCREC

Short circuit recovery time

2

20

ms

output stage turned on

ILEAKOUT

Output Leakage current

-20

20

µA

BGNDPU

Output voltage broken GND with pull-up

96

100

%VDD

BGNDPD

Output voltage broken GND with pull-down

04

%VDD

BVDDPU

Output voltage broken VDD with pull-up

96

100

%VDD

BVDDPD

Output voltage broken VDD with pull-down

04

%VDD