LM13700M National Semiconductor, LM13700M Datasheet - Page 8

• Manufacturer Part Number: LM13700M
• Description: Operational Amplifier (Op-Amp) IC
• Manufacturer: National Semiconductor

Specifications of LM13700M

• No. Of Amplifiers: 2
• No. Of Pins: 16
• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Mounting Type: Surface Mount
• Package / Case: 16-NSOIC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Applications
Voltage Controlled Amplifiers
For optimum signal-to-noise performance, I
large as possible as shown by the Output Voltage vs. Ampli-
fier Bias Current graph. Larger amplitudes of input signal
also improve the S/N ratio. The linearizing diodes help here
by allowing larger input signals for the same output distortion
as shown by the Distortion vs. Differential Input Voltage
graph. S/N may be optimized by adjusting the magnitude of
the input signal via R
below some desired level. The output voltage swing can
then be set at any level by selecting R
IN
(Figure 2) until the output distortion is
L
.
FIGURE 2. Voltage Controlled Amplifier
ABC
should be as
FIGURE 1. Linearizing Diodes
(Continued)
8
Although the noise contribution of the linearizing diodes is
negligible relative to the contribution of the amplifier’s inter-
nal transistors, I
mizes the dynamic junction resistance of the diodes (r
maximizes their linearizing action when balanced against
R
specific application demands otherwise.
IN
. A value of 1 mA is recommended for I
D
should be as large as possible. This mini-
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D
unless the
e
) and