LMV774MTX/NOPB National Semiconductor, LMV774MTX/NOPB Datasheet - Page 15

• Manufacturer Part Number: LMV774MTX/NOPB
• Description: IC OPAMP QUAD LO NOISE 14-TSSOP
• Manufacturer: National Semiconductor

Specifications of LMV774MTX/NOPB

• Amplifier Type: General Purpose
• Number Of Circuits: 4
• Output Type: Rail-to-Rail
• Slew Rate: 1.4 V/µs
• Gain Bandwidth Product: 3.5MHz
• Current - Input Bias: 0.23pA
• Voltage - Input Offset: 250µV
• Current - Supply: 600µA
• Current - Output / Channel: 75mA
• Voltage - Supply, Single/dual (±): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 14-TSSOP
• Rail/rail I/o Type: Rail to Rail Output
• Number Of Elements: 4
• Unity Gain Bandwidth Product: 3.5MHz
• Common Mode Rejection Ratio: 80dB
• Input Offset Voltage: 1@5VmV
• Input Bias Current: 100pA
• Single Supply Voltage (typ): 3/5V
• Dual Supply Voltage (typ): Not RequiredV
• Voltage Gain In Db: 100dB
• Power Supply Rejection Ratio: 82dB
• Power Supply Requirement: Single
• Shut Down Feature: No
• Single Supply Voltage (min): 2.7V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 14
• Package Type: TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -
• Lead Free Status / Rohs Status: Compliant
• Other names: LMV774MTX

HIGH PASS FILTER
In a similar approach, one can derive the transfer function of
a high pass filter. A typical first order high pass filter is shown
below:
Writing the KCL for this circuit :
(V
Solving these two equations to find the transfer function and
using:
(high frequency gain)
Which results:
Looking at the transfer function, it is clear that when f/f
small, the capacitor is open and hence no signal is getting in
to the amplifier. As the frequency increases the amplifier
starts operating. At f = f
circuit and the amplifier will have a constant, high frequency,
gain of H
pass filter:
1
denotes the voltage between C and R
O
.
Figure 6
FIGURE 5. Highpass FIlter
shows the transfer function of this high
O
the capacitor behaves like a short
and
1
)
20039654
(12)
(13)
(14)
O
is
15
BAND PASS FILTER
Combining a low pass filter and a high pass filter will generate
a band pass filter. In this network the input impedance forms
the high pass filter while the feedback impedance forms the
low pass filter. Choosing the corner frequencies so that f
f
through the filter while frequencies below f
be cut off.
The transfer function can be easily calculated using the same
methodology as before.
Where
The transfer function is presented in the following figure.
2
, then all the frequencies in between, f
FIGURE 6. Highpass Filter Transfer Function
FIGURE 7. Bandpass Filter
1
1
≤
and above f
f
≤
20039658
www.national.com
f
20039660
2
, will pass
2
(15)
will
1
<