KMA199E T/R NXP Semiconductors, KMA199E T/R Datasheet - Page 6

• Manufacturer Part Number: KMA199E T/R
• Manufacturer: NXP Semiconductors

Specifications of KMA199E T/R

• Operating Temperature (min): -40C
• Operating Supply Voltage (typ): 5V
• Lead Free Status / Rohs Status: Compliant

NXP Semiconductors
KMA199E_1
Product data sheet
6.3 Power-lost detection
6.4 Low supply voltage detection
The power-lost detection circuits enable the detection of an interrupted supply or ground
line of the KMA199E. In case of a power-lost condition, two internal switches within the
sensor are closed, connecting the pin of the analog output with the pins of the supply
voltage and the ground.
Table 3
resistance.
Table 3.
If the supply voltage is below the switch-off threshold voltage, a status bit is set.
Following table describes the behavior of the analog output at different supply voltages.
Table 4.
Load resistance
R
Voltage range
0 V to
V
V
V
4.5 V
4.5 V to 5.5 V
Fig 3. Equivalent output circuit in case of a power-lost condition
POR
th(off)
th(on)
L
1.5 V to V
> 5 k
to V
or V
shows the resulting output voltage depending on the error case and the load
1.5 V
th(on)
th(off)
Power-lost behavior
Supply voltage behavior
POR
or
to
Description
the output drives an active LOW, but the
switches of the power-lost detection circuits
are not fully opened and set the output to a
level between ground and half the supply
voltage
all modules begin to work and the power-on
reset is active
all modules begin to work and the digital part
is initialized
analog output is switched on after power-on
time and represents the measured angle
normal operation where the sensor works with
the specified accuracy
Rev. 01 — 18 October 2007
Supply voltage lost
V
O
4 %V
KMA199E
Z O(pl)
Z O(pl)
DD
V
OUT/DIGINT
GND
DD
001aag810
Programmable angle sensor
Ground lost
V
O
Analog output
actively driven output to a
voltage level between ground
and half the supply voltage
diagnostics at LOW level
EEPROM defined diagnostic
level
analog output of the
measured angle without the
specified accuracy
analog output of the
measured angle
96 %V
KMA199E
DD
© NXP B.V. 2007. All rights reserved.
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