LM6142AIM National Semiconductor, LM6142AIM Datasheet - Page 13

• Manufacturer Part Number: LM6142AIM
• Description: IC, OP AMP, DUAL 17MHZ, 6142, SOIC8
• Manufacturer: National Semiconductor

Specifications of LM6142AIM

• Op Amp Type: General Purpose
• No. Of Amplifiers: 2
• Bandwidth: 17MHz
• Slew Rate: 25V/µs
• Supply Voltage Range: 1.8V To 24V
• Amplifier Case Style: SOIC
• No. Of Pins: 8
• Operating Temperature Range: -40°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Typical Applications
lowers the input impedance. Any mismatch in these preci-
sion resistors reduces the CMR as well. Using the LM6144,
all of these problems are eliminated.
In this example, amplifiers A and B act as buffers to the
differential stage (Figure 6). These buffers assure that the
input impedance is over 100MΩ 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.
Ordering Information
8-Pin Molded DIP
8-Pin Small Outline
14-Pin Molded DIP
14-Pin Small Outline
8-Pin CDIP
Package
FIGURE 6.
(Continued)
Temperature Range
−40˚C to +85˚C
LM6142AIMX
LM6142BIMX
LM6144AIMX
LM6144BIMX
LM6142AIM
LM6142BIM
LM6144AIM
LM6144BIM
LM6142AIN
LM6142BIN
LM6144AIN
LM6144BIN
Industrial
01205713
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The gain is set by the ratio of R2/R1 and R3 should equal R1
and R4 equal R2. Making R4 slightly smaller than R2 and
adding a trim pot equal to twice the difference between R2
and R4 will allow the CMR to be adjusted for optimum.
With both rail to rail input and output ranges, the inputs and
outputs are only limited by the supply voltages. Remember
that even with rail-to-rail output, the output can not swing
past the supplies so the combined common mode voltage
plus the signal should not be greater than the supplies or
limiting will occur.
SPICE MACROMODEL
A SPICE macromodel of this and many other National Semi-
conductor op amps is available at no charge from the NSC
Customer Response Group at 800-272-9959.
Temperature Range
LM6142AMJ-QML
−55˚C to +125˚C
Military
Drawing
www.national.com
N08E
M08A
N14A
M14A
J08A
NSC