AS5043
Data Sheet – Analog Output
11.1.2 Diagnostic Output Mode
Figure 9: Diagnostic Output Mode
In an error case, the output
voltage is in the grey area
In Diagnostic Output Mode (see Figure 9)
the analog output of the internal DAC ranges
from 10% - 90% Vref*). In an error case,
either when the supply is interrupted or
when the magnetic field is in the “red” range,
(see Table 3) the output is switched to 0V
and thus indicates the error condition.
Vref
100%
90%
analog
output
voltage
normal
operating
area
10%
0%
It is possible to enable the analog output
permanently (it will not be switched off even
if the magnetic field is out of range). To
angle
360°
0°
180°
270°
90°
enable this feature an OTP bit in the factory setting must be set. The corresponding bit is FS6. See application note
AS5040-20 (Extended features of OTP programming) for further details. The application note is available for download at
the austriamicrosystems website.
The analog and digital outputs will have the following conditions:
Status
DAC Output Voltage
10% - 90% Vref*)
< 10% Vref*),
SSI Digital Output
#0 - #1023 (0°-360°), MagRngn = 1
#0 - #1023 (0°-360°)
Normal operation
Magnetic field out of range
DAC output is switched to 0V
out of range is signaled in status bits:
MagInc=MagDec=LIN=1, MagRngn= 0
Broken positive power supply
< 10% VDD**)
< 10% VDD**)
> 90% VDD**)
> 90% VDD**)
(VOUT pull down resistor at receiving side)
Broken power supply ground
with pull down resistor at DO (receiving
side), all bits read by the SSI will be “0”-
s, indicating a non-valid output
(VOUT pull down resistor at receiving side)
Broken positive power supply
(VOUT pull up resistor at receiving side)
Broken power supply ground
(VOUT pull up resistor at receiving side)
*) Vref = internal: ½ * VDD5V (pin #16) or external: VDACref (pin#9), depending on Ref_extEN bit in OTP (0=int., 1=ext.)
**) VDD = positive supply voltage at receiving side (3.0 – 5.5V)
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