Datasheet
V
OV
V
UV
V
OUT
V
IN
R3 set
R2 = R3((V
THR
/V
THF
)V
OV
/V
UV
± 1)
R1 = R3((1/V
THF
)V
OV
- (V
THR
/V
THF
)V
OV
/V
UV
)
Ex. V
OV
= 3.465V, V
UV
= 3.135V, i.e. V
RANGE
= 3.3V +/- 5%
R3 set to 10 k5
R2 = 10k((0.4/0.394)3.465/3.135 ± 1) 1.21 k5
R1 = 10k((1/0.394)3.465 - (0.4/0.394)3.465/3.135) 76.8 k5
V
OV
V
UV
V
OUT
V
IN
R3 set
R2 = R3(V
OV
/V
UV
± 1)
R1 = R3((1/V
THF
)V
OV
- V
OV
/V
UV
)
Ex. V
OV
= 3.465V, V
UV
= 3.135V, i.e. V
RANGE
= 3.3V +/- 5%
R3 set to 10 k5
R2 = 10k((3.465/3.135) ± 1) 1.05 k5
R1 = 10k((1/0.394)3.465 ± 3.465/3.135) 76.8 k5
V
OV
V
UV
V
OUT
V
IN
R3 set
R2 = R3((V
THF
/V
THR
)V
OV
/V
UV
± 1)
R1 = R3((1/V
THR
)V
OV
- (V
THF
/V
THR
)V
OV
/V
UV
)
Ex. V
OV
= 3.465V, V
UV
= 3.135V, i.e. V
RANGE
= 3.3V +/- 5%
R3 set to 10 k5
R2 = 10k((0.394/0.4)3.465/3.135 ± 1) 8875
R1 = 10k((1/0.4)3.465 - (0.394/0.4)3.465/3.135) 75 k5
V
OV
V
UV
V
OUT
V
IN
R3 set
R2 = R3(V
OV
/V
UV
± 1)
R1 = R3((1/V
THR
)V
OV
- V
OV
/V
UV
)
Ex. V
OV
= 3.465V, V
UV
= 3.135V, i.e. V
RANGE
= 3.3V +/- 5%
R3 set to 10 k5
R2 = 10k((3.465/3.135) ± 1) 1.05 k5
R1 = 10k((1/0.4)3.465 ± 3.465/3.135) 75 k5
LMV7231
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SNOSB45E –FEBRUARY 2010–REVISED MARCH 2013
Figure 34. Exiting the Voltage Detection Window Figure 35. Rising Into and Out Of the Voltage
Detection Window
Figure 36. Entering the Voltage Detection Window Figure 37. Falling Into and Out Of the Voltage
Detection Window
INPUT/OUTPUT VOLTAGE RANGE ABOVE V+
The LMV7231 Hex Window Comparator with 1.5% precision can accurately monitor up to 6 power rails or
batteries at one time. The input and output voltages of the device can exceed the supply voltage, V+, of the
comparator, and can be up to the absolute maximum ratings without causing damage or performance
degradation. The typical µC input pin with crowbar diode ESD protection circuitry will not allow the input to go
above V+, and thus its usefulness is limited in power supply supervision applications.
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