LM6165W883 National Semiconductor, LM6165W883 Datasheet - Page 8

• Manufacturer Part Number: LM6165W883
• Description: High Speed Operational Amplifier
• Manufacturer: National Semiconductor

www.national.com
Simplified Schematic
Application Tips
The LM6365 is stable for gains of 25 or greater. The LM6361
and LM6364, specified in separate datasheets, are compen-
sated versions of the LM6365. The LM6361 is unity-gain
stable, while the LM6364 is stable for gains as low as 5. The
LM6361, and LM6364 have the same high slew rate as the
LM6365, typically 300 V/µs.
To use the LM6365 for gains less than 25, a series
resistor-capacitor network should be added between the in-
put pins (as shown in the Typical Applications, Noise Gain
Compensation) so that the high-frequency noise gain rises
to at least 25.
Power supply bypassing will improve stability and transient
response of the LM6365, and is recommended for every de-
sign. 0.01 µF to 0.1 µF ceramic capacitors should be used
Typical Applications
Offset Voltage Adjustment
DS009152-11
R
[R1 + R
8
X
C
X
(from each supply “rail” to ground); an additional 2.2 µF to
10 µF (tantalum) may be required for extra noise reduction.
Keep all leads short to reduce stray capacitance and lead in-
ductance, and make sure ground paths are low-impedance,
especially where heavier currents will be flowing. Stray ca-
pacitance in the circuit layout can cause signal coupling be-
tween adjacent nodes, and can cause circuit gain to uninten-
tionally vary with frequency.
Breadboarded circuits will work best if they are built using
generic PC boards with a good ground plane. If the op amps
are used with sockets, as opposed to being soldered into the
circuit, the additional input capacitance may degrade circuit
performance.
F
1/(2 • 25 MHz)
(1 + R1/R2)] = 25 R
Noise-Gain Compensation
X
DS009152-3
DS009152-12