LMV824M National Semiconductor, LMV824M Datasheet - Page 15

Operational Amplifier (Op-Amp) IC

LMV824M

Manufacturer Part Number
LMV824M
Description
Operational Amplifier (Op-Amp) IC
Manufacturer
National Semiconductor
Datasheet

Specifications of LMV824M

No. Of Amplifiers
1
Bandwidth
5MHz
Slew Rate
2V/µs
No. Of Pins
14
Single Supply Voltage Min (+v)
2.7V
Amplifier Type
Operational
Mounting Type
Surface Mount
Peak Reflow Compatible (260 C)
No
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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2.5 Tri-level Voltage Detector
The tri-level voltage detector of Figure 13 provides a type of
window comparator function. It detects three different input
voltage ranges: Min-range, Mid-range, and Max-range. The
output voltage (V
clamped at GND for the Mid-range. For the Max-range, V
at V
the circuit of Figure 13 .
Its operation is as follows: V
the diode bridge to absorb I
tion (V
ode bridge. When this limit is reached, the clamping effect
ee
. Figure 14 shows a V
O
= 0V). Eventually, I
FIGURE 13. Tri-level Voltage Detector
O
) is at V
IN
IN
O
reaches the bias limit of the di-
I
CC
to maintain a clamped condi-
vs. V
deviating from GND, causes
for the Min-range. V
I
oscilloscope photo per
DS100128-34
O
O
is
is
15
stops and the op amp responds open loop. The design equa-
tion directly preceding Figure 14 , shows how to determine
the clamping range. The equation solves for the input volt-
age band on each side GND. The mid-range is twice this
voltage band.
FIGURE 14. X, Y Oscilloscope Trace showing V
OV
V
IN
-V IN
per the Circuit of Figure 13
|
v
OV
|
DS100128-89
v
|
+V IN
DS100128-35
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OUT
vs

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