AS5262

Datasheet - Detailed Descr i p ti on

www.ams.com

Revision 1.1

15 - 36

8.2.8 Analog Output Diagnostic Mode

Due to the low pin count in the application a wrong operation must be indicated by the output pin OUT. 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 over the total operation

range. The failure band high is defined always from 96 to 100%. Several failures can happen during operation. The output signal remains in

these bands over the specified operating and load conditions. All different failures can be grouped into the internal alarms (failures) and the

application related failures.

Ω

Ω load pull-up

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

8.2.9 Analog Output Driver Parameters

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

Notes:

1. This parameter will be finally defined after temperature characterisation.

2. Design target for this value is reduced.

Table 9. Different Failure Cases of AS5262

Type

Failure Mode

Symbol

Failure Band

Note

Internal alarms (failures)

Out of magnetic range

(too less or too high magnetic input)

MAGRng

High/Low

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

Dependant 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 10. General Parameters for the Output Driver

Symbol

Parameter

Min

Typ

Max

Unit

Note

IOUTSCL

Short circuit output current (low side driver)

5

10

20

mA

IOUTSCH

Short circuit output current (high side driver)

-20

-10

-5

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

0

4

%VDD

BVDDPU

Output voltage broken VDD with pull-up

96

100

%VDD

BVDDPD

Output voltage broken VDD with pull-down

0

4

%VDD

OUTRATIO

Output ratiometric error

-0.5

0.5

%VDD

OUTDNL

Output DNL

10

(1)

LSB

Between 4% and 96% of VDD

OUTINL

Output INL

-10

(2)

10

(2)

LSB

Between 4% and 96% of VDD