Datasheet

FGA
Overflow detection
RAILS_FLAG
OFLO_FLAGS
ADC_DOUT
SENDIAG_THLDH
and SENDIAG_THLDL
Filter
BUFF
Modulator
SHORT_THLD_
FLAG
RAILS_FLAG
VINP
VINN
RAILS_FLAG
Generator
RAILS_FLAG
Generator
CH1 CH2 CH3CH0
CH1 CH2 CH3CH0
CH1 CH2 CH3CH0
CH1 CH2 CH3CH0
CH0 is being sampled
CH1 is being sampled
CH2 is being sampled
CH3 is being sampled
BURNOUT_EN
BURNOUT_EN
BURNOUT_EN
Burnout Currents
BURNOUT_EN
LMP90100
SNAS510P –JANUARY 2011–REVISED MARCH 2013 www.ti.com
Figure 49. Burnout Currents Injection for ScanMode3
Sensor Diagnostic Flags
Burnout currents can be used to verify that an external sensor is still operational before attempting to make
measurements on that channel. A non-operational sensor means that there is a possibility the connection
between the sensor and the LMP90xxx is open circuited, short circuited, shorted to VA or GND, overloaded, or
the reference may be absent. The sensor diagnostic flags diagram can be seen in Figure 50.
Figure 50. Sensor Diagnostic Flags Diagram
The sensor diagnostic flags are located in the SENDIAG_FLAGS register and are described in further details
below.
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