LPV7215MG/NOPB National Semiconductor, LPV7215MG/NOPB Datasheet - Page 16

• Manufacturer Part Number: LPV7215MG/NOPB
• Description: IC COMP 1.8V P-P R-R I/O SC70-5
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: General Purposer

Specifications of LPV7215MG/NOPB

• Number Of Elements: 1
• Output Type: MOS, Push-Pull, Rail-to-Rail
• Voltage - Supply: 1.8 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 6-TSSOP (5 lead), SC-88A, SOT-353
• Comparator Type: General Purpose
• No. Of Comparators: 1
• Response Time: 4.5µs
• Ic Output Type: Push Pull
• Supply Current: 580nA
• Supply Voltage Range: 1.8V To 5.5V
• Amplifier Case Style: SC-70
• Rohs Compliant: Yes
• Number Of Elements: 1
• Technology: CMOS
• Input Offset Voltage: 3mV
• Single Supply Voltage (typ): 3/5V
• Dual Supply Voltage (typ): Not RequiredV
• Supply Current (max): 0.00103@5VmA
• Power Supply Requirement: Single
• Common Mode Rejection Ratio: 98dB
• Voltage Gain In Db: 120dB
• Power Supply Rejection Ratio: 82dB
• Single Supply Voltage (min): 1.8V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 5
• Package Type: SC-70
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LPV7215MG; LPV7215MGTR

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Consider the output of Figure 10 to be high to analyze the
circuit. That implies that the inverted input (V
the non-inverting input (V
through R
the non-inverting input. The value of V
If R
At this point the comparator switches pulling down the output
to the negative rail. The value of V
If R
The capacitor C
V
parator switches again, bringing it back to the initial stage. The
time period is equal to twice the time it takes to discharge
C
the formula for the frequency is:
F = 1/(2·R
WINDOW DETECTOR
A window detector monitors the input signal to determine if it
falls between two voltage levels.
The comparator outputs A and B are high only when
V
where these are defined as
Others names for window detectors are: threshold detector,
level detectors, and amplitude trigger or detector.
C
1
REF1
decreases until it is equal to V
from 2V
1
1
= R
= R
< V
2
2
IN
4
= R
= R
4
, and the voltage V
·C
CC
< V
1
/3 to V
V
3
3
·ln2)
REF2
then V
then V
REF2
1
V
now discharges through R
REF1
= (R
CC
“or within the window.”
A1
A2
/3, which is given by R
= R
2
= 2V
= V
A
+R
). This causes the C
3
/(R
CC
3
)/(R
CC
1
/3
C
+R
/3
increases until it is equal to
1
A2
+R
2
A
+R
, at which point the com-
at this point is
2
+R
3
A
) * V
at this point is
3
) * V
4
+
, and the voltage
C
4
1
+
) is lower than
C
to be charged
1
·ln2. Hence
16
FIGURE 12. Window Detector Output Signal
FIGURE 11. Window Detector
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