LM6134BIM National Semiconductor, LM6134BIM Datasheet - Page 12

• Manufacturer Part Number: LM6134BIM
• Description: IC OP AMP QUAD H SPEED LP 14SOIC
• Manufacturer: National Semiconductor

Specifications of LM6134BIM

• Amplifier Type: General Purpose
• Number Of Circuits: 4
• Output Type: Rail-to-Rail
• Slew Rate: 14 V/µs
• Gain Bandwidth Product: 11MHz
• Current - Input Bias: 125nA
• Voltage - Input Offset: 1700µV
• Current - Supply: 390µA
• Current - Output / Channel: 3.5mA
• Voltage - Supply, Single/dual (±): 1.8 V ~ 24 V, ±0.9 V ~ 12 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• -3db Bandwidth: -
• Other names: *LM6134BIM

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LM6132/34 Application Information
Figure 6 shows a method for compensating for load capaci-
tance (C
(Continued)
O
) effects by adding both an isolation resistor R
FIGURE 3.
FIGURE 4.
FIGURE 5.
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O
at
12
the output and a feedback capacitor C
output and the inverting input pin. Feedback capacitor C
compensates for the pole introduced by R
mizing ringing in the output waveform while the feedback
resistor R
R
of R
Typical Applications
3 OP AMP INSTRUMENTATION AMP WITH
RAIL-TO-RAIL INPUT AND OUTPUT
Using the LM6134, a 3 op amp instrumentation amplifier with
rail-to-rail inputs and rail to rail output can be made. These
features make these instrumentation amplifiers ideal for
single supply systems.
Some manufacturers use a precision voltage divider array of
5 resistors to divide the common-mode voltage to get an
input range of rail-to-rail or greater. The problem with this
method is that it also divides the signal, so to even get unity
gain, the amplifier must be run at high closed loop gains.
This raises the noise and drift by the internal gain factor and
lowers the input impedance. Any mismatch in these preci-
sion resistors reduces the CMR as well. Using the LM6134,
all of these problems are eliminated.
In this example, amplifiers A and B act as buffers to the
differential stage (Figure 7). These buffers assure that the
input impedance is over 100 MΩ and they eliminate the
requirement for precision matched resistors in the input
stage. They also assure that the difference amp is driven
from a voltage source. This is necessary to maintain the
CMR set by the matching of R1–R2 with R3–R4.
O
. Depending on the size of the load capacitance, the value
O
is typically chosen to be between 100Ω to 1 kΩ.
F
compensates for dc inaccuracies introduced by
FIGURE 6.
FIGURE 7.
F
directly between the
O
and C
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O
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, mini-
F